diff options
| author | theshed <theshed@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-06-01 22:00:28 +0000 |
|---|---|---|
| committer | theshed <theshed@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2013-06-01 22:00:28 +0000 |
| commit | 51af0586c9634da8dfb35c6c71e0726392c1fbb3 (patch) | |
| tree | 43506df5154db29d232b02f8189871eacc975bc3 /os/hal/platforms/LPC122x | |
| parent | 62ae17087c620312a24a87ac7435a8c2257ab8b6 (diff) | |
| download | ChibiOS-51af0586c9634da8dfb35c6c71e0726392c1fbb3.tar.gz ChibiOS-51af0586c9634da8dfb35c6c71e0726392c1fbb3.tar.bz2 ChibiOS-51af0586c9634da8dfb35c6c71e0726392c1fbb3.zip | |
More LPC122x drivers from Marcin J.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@5794 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/platforms/LPC122x')
| -rw-r--r-- | os/hal/platforms/LPC122x/ext_lld.c | 234 | ||||
| -rw-r--r-- | os/hal/platforms/LPC122x/ext_lld.h | 172 | ||||
| -rw-r--r-- | os/hal/platforms/LPC122x/ext_lld_isr.c | 159 | ||||
| -rw-r--r-- | os/hal/platforms/LPC122x/ext_lld_isr.h | 103 | ||||
| -rw-r--r-- | os/hal/platforms/LPC122x/i2c_lld.c | 438 | ||||
| -rw-r--r-- | os/hal/platforms/LPC122x/i2c_lld.h | 228 | ||||
| -rw-r--r-- | os/hal/platforms/LPC122x/platform.mk | 5 | ||||
| -rw-r--r-- | os/hal/platforms/LPC122x/pwm_lld.c | 446 | ||||
| -rw-r--r-- | os/hal/platforms/LPC122x/pwm_lld.h | 455 | ||||
| -rw-r--r-- | os/hal/platforms/LPC122x/rtc_lld.c | 259 | ||||
| -rw-r--r-- | os/hal/platforms/LPC122x/rtc_lld.h | 236 |
11 files changed, 2735 insertions, 0 deletions
diff --git a/os/hal/platforms/LPC122x/ext_lld.c b/os/hal/platforms/LPC122x/ext_lld.c new file mode 100644 index 000000000..553ae9b5c --- /dev/null +++ b/os/hal/platforms/LPC122x/ext_lld.c @@ -0,0 +1,234 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+ LPC122x EXT driver - Copyright (C) 2013 Marcin Jokel
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file LPC122x/ext_lld.c
+ * @brief LPC122x EXT subsystem low level driver source.
+ *
+ * @addtogroup EXT
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if HAL_USE_EXT || defined(__DOXYGEN__)
+
+#include "ext_lld_isr.h"
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/**
+ * @brief EXTD0 driver identifier.
+ */
+#if LPC122x_EXT_USE_EXT0 || defined(__DOXYGEN__)
+EXTDriver EXTD0;
+#endif
+
+/**
+ * @brief EXTD1 driver identifier.
+ */
+#if LPC122x_EXT_USE_EXT1 || defined(__DOXYGEN__)
+EXTDriver EXTD1;
+#endif
+
+/**
+ * @brief EXTD2 driver identifier.
+ */
+#if LPC122x_EXT_USE_EXT2 || defined(__DOXYGEN__)
+EXTDriver EXTD2;
+#endif
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level EXT driver initialization.
+ *
+ * @notapi
+ */
+void ext_lld_init(void) {
+
+ /* Driver initialization.*/
+#if LPC122x_EXT_USE_EXT0
+ extObjectInit(&EXTD0);
+ EXTD0.gpio = LPC_GPIO0;
+#endif
+
+#if LPC122x_EXT_USE_EXT1
+ extObjectInit(&EXTD1);
+ EXTD1.gpio = LPC_GPIO1;
+#endif
+
+#if LPC122x_EXT_USE_EXT2
+ extObjectInit(&EXTD2);
+ EXTD2.gpio = LPC_GPIO2;
+#endif
+}
+
+/**
+ * @brief Configures and activates the EXT peripheral.
+ *
+ * @param[in] extp pointer to the @p EXTDriver object
+ *
+ * @notapi
+ */
+void ext_lld_start(EXTDriver *extp) {
+ int i;
+
+ /* Configure all pins as edge sensitive */
+#if LPC122x_EXT_USE_EXT0
+ if (extp == &EXTD0) {
+ LPC_GPIO0->IS = 0;
+ ext_lld_exti_irq_enable(EXTI0_IRQ);
+ }
+#endif
+
+#if LPC122x_EXT_USE_EXT1
+ if (extp == &EXTD1) {
+ LPC_GPIO1->IS = 0;
+ ext_lld_exti_irq_enable(EXTI1_IRQ);
+ }
+#endif
+
+#if LPC122x_EXT_USE_EXT2
+ if (extp == &EXTD2) {
+ LPC_GPIO2->IS = 0;
+ ext_lld_exti_irq_enable(EXTI2_IRQ);
+ }
+#endif
+
+ /* Configuration of autostart channels.*/
+ for (i = 0; i < EXT_MAX_CHANNELS; i++)
+ if (extp->config->channels[i].mode & EXT_CH_MODE_AUTOSTART)
+ ext_lld_channel_enable(extp, i);
+ else
+ ext_lld_channel_disable(extp, i);
+}
+
+/**
+ * @brief Deactivates the EXT peripheral.
+ *
+ * @param[in] extp pointer to the @p EXTDriver object
+ *
+ * @notapi
+ */
+void ext_lld_stop(EXTDriver *extp) {
+
+ LPC_GPIO_Type * gp = extp->gpio;
+
+ if (extp->state == EXT_ACTIVE) {
+#if LPC122x_EXT_USE_EXT0
+ if (extp == &EXTD0) {
+ ext_lld_exti_irq_disable(EXTI0_IRQ);
+ }
+#endif
+
+#if LPC122x_EXT_USE_EXT1
+ if (extp == &EXTD1) {
+ ext_lld_exti_irq_disable(EXTI1_IRQ);
+ }
+#endif
+
+#if LPC122x_EXT_USE_EXT2
+ if (extp == &EXTD2) {
+ ext_lld_exti_irq_disable(EXTI2_IRQ);
+ }
+#endif
+ }
+
+ gp->IE = 0;
+ gp->IC = 0xFFFFFFFF;
+ __NOP();
+ __NOP();
+}
+
+/**
+ * @brief Enables an EXT channel.
+ *
+ * @param[in] extp pointer to the @p EXTDriver object
+ * @param[in] channel channel to be enabled
+ *
+ * @notapi
+ */
+void ext_lld_channel_enable(EXTDriver *extp, expchannel_t channel) {
+
+ LPC_GPIO_Type * gp;
+
+ gp = extp->gpio;
+
+ /* Programming edge irq enables */
+ if (extp->config->channels[channel].mode & EXT_CH_MODE_BOTH_EDGES)
+ gp->IBE |= (1 << channel);
+ else {
+ gp->IBE &= ~(1 << channel);
+ if (extp->config->channels[channel].mode & EXT_CH_MODE_RISING_EDGE)
+ gp->IEV |= (1 << channel);
+ else
+ gp->IEV &= (1 << channel);
+ }
+
+ gp->IC = (1 << channel); /* Clear interrupt on selected channel */
+ __NOP();
+ __NOP();
+
+ gp->IE |= (1 << channel); /* Interrupt on selected channel
+ is not masked */
+}
+
+/**
+ * @brief Disables an EXT channel.
+ *
+ * @param[in] extp pointer to the @p EXTDriver object
+ * @param[in] channel channel to be disabled
+ *
+ * @notapi
+ */
+void ext_lld_channel_disable(EXTDriver *extp, expchannel_t channel) {
+
+ LPC_GPIO_Type * gp;
+
+ gp = extp->gpio;
+
+ gp->IE &= ~(1 << channel); /* Mask interrupt on selected channel */
+ gp->IC = (1 << channel); /* Clear interrupt on selected channel */
+ __NOP();
+ __NOP();
+}
+
+#endif /* HAL_USE_EXT */
+
+/** @} */
diff --git a/os/hal/platforms/LPC122x/ext_lld.h b/os/hal/platforms/LPC122x/ext_lld.h new file mode 100644 index 000000000..89e720494 --- /dev/null +++ b/os/hal/platforms/LPC122x/ext_lld.h @@ -0,0 +1,172 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+ LPC122x EXT driver - Copyright (C) 2013 Marcin Jokel
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file LPC122x/ext_lld.h
+ * @brief LPC122x EXT subsystem low level driver header.
+ *
+ * @addtogroup EXT
+ * @{
+ */
+
+#ifndef _EXT_LLD_H_
+#define _EXT_LLD_H_
+
+#if HAL_USE_EXT || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/**
+ * @brief Available number of EXT channels.
+ */
+#define EXT_MAX_CHANNELS 32
+
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @brief EXT0 driver enable switch.
+ * @details If set to @p TRUE the support for EXT1 is included.
+ * @note The default is @p FALSE.
+ */
+#if !defined(LPC122x_EXT_USE_EXT0) || defined(__DOXYGEN__)
+#define LPC122x_EXT_USE_EXT0 FALSE
+#endif
+
+/**
+ * @brief EXT1 driver enable switch.
+ * @details If set to @p TRUE the support for EXT1 is included.
+ * @note The default is @p FALSE.
+ */
+#if !defined(LPC122x_EXT_USE_EXT1) || defined(__DOXYGEN__)
+#define LPC122x_EXT_USE_EXT1 FALSE
+#endif
+
+/**
+ * @brief EXT2 driver enable switch.
+ * @details If set to @p TRUE the support for EXT1 is included.
+ * @note The default is @p FALSE.
+ */
+#if !defined(LPC122x_EXT_USE_EXT2) || defined(__DOXYGEN__)
+#define LPC122x_EXT_USE_EXT2 FALSE
+#endif
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief EXT channel identifier.
+ */
+typedef uint32_t expchannel_t;
+
+/**
+ * @brief Type of an EXT generic notification callback.
+ *
+ * @param[in] extp pointer to the @p EXPDriver object triggering the
+ * callback
+ */
+typedef void (*extcallback_t)(EXTDriver *extp, expchannel_t channel);
+
+/**
+ * @brief Channel configuration structure.
+ */
+typedef struct {
+ /**
+ * @brief Channel mode.
+ */
+ uint8_t mode;
+
+ /**
+ * @brief Channel callback.
+ */
+ extcallback_t cb;
+} EXTChannelConfig;
+
+/**
+ * @brief Driver configuration structure.
+ * @note It could be empty on some architectures.
+ */
+typedef struct {
+ /**
+ * @brief Channel configurations.
+ */
+ EXTChannelConfig channels[EXT_MAX_CHANNELS];
+ /* End of the mandatory fields.*/
+} EXTConfig;
+
+/**
+ * @brief Structure representing an EXT driver.
+ */
+struct EXTDriver {
+ /**
+ * @brief Driver state.
+ */
+ extstate_t state;
+ /**
+ * @brief Current configuration data.
+ */
+ const EXTConfig *config;
+ /* End of the mandatory fields.*/
+ LPC_GPIO_Type *gpio;
+};
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#if LPC122x_EXT_USE_EXT0 || !defined(__DOXYGEN__)
+extern EXTDriver EXTD0;
+#endif
+
+#if LPC122x_EXT_USE_EXT1 || !defined(__DOXYGEN__)
+extern EXTDriver EXTD1;
+#endif
+
+#if LPC122x_EXT_USE_EXT2 || !defined(__DOXYGEN__)
+extern EXTDriver EXTD2;
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void ext_lld_init(void);
+ void ext_lld_start(EXTDriver *extp);
+ void ext_lld_stop(EXTDriver *extp);
+ void ext_lld_channel_enable(EXTDriver *extp, expchannel_t channel);
+ void ext_lld_channel_disable(EXTDriver *extp, expchannel_t channel);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_EXT */
+
+#endif /* _EXT_LLD_H_ */
+
+/** @} */
diff --git a/os/hal/platforms/LPC122x/ext_lld_isr.c b/os/hal/platforms/LPC122x/ext_lld_isr.c new file mode 100644 index 000000000..e8ad6f841 --- /dev/null +++ b/os/hal/platforms/LPC122x/ext_lld_isr.c @@ -0,0 +1,159 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+ LPC122x EXT driver - Copyright (C) 2013 Marcin Jokel
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file LPC122x/ext_lld_isr.c
+ * @brief LPC122x EXT subsystem low level driver ISR code.
+ *
+ * @addtogroup EXT
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if HAL_USE_EXT || defined(__DOXYGEN__)
+
+#include "ext_lld_isr.h"
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+#if LPC122x_EXT_USE_EXT0 || LPC122x_EXT_USE_EXT1 || LPC122x_EXT_USE_EXT2 || \
+ defined(__DOXYGEN__)
+/**
+ * @brief I2C error handler.
+ *
+ * @param[in] i2cp pointer to the @p I2CDriver object
+ *
+ * @notapi
+ */
+static void ext_lld_serve_interrupt(EXTDriver *extp) {
+ uint32_t port_stat;
+ uint8_t i;
+
+ port_stat = extp->gpio->MIS; /* Read interrupt status */
+ extp->gpio->IC = port_stat; /* Clear interrupt flags */
+
+ for (i = 0; i < EXT_MAX_CHANNELS; i++) {
+ if (port_stat & 0x01) {
+ extp->config->channels[i].cb(extp, i);
+ }
+ port_stat = port_stat >> 1;
+ }
+}
+#endif
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+#if LPC122x_EXT_USE_EXT0 || defined(__DOXYGEN__)
+/**
+ * @brief PIO0 interrupt handler.
+ *
+ * @isr
+ */
+CH_IRQ_HANDLER(VectorA4) {
+
+ CH_IRQ_PROLOGUE();
+ ext_lld_serve_interrupt(&EXTD0);
+ CH_IRQ_EPILOGUE();
+}
+#endif
+
+#if LPC122x_EXT_USE_EXT1 || defined(__DOXYGEN__)
+/**
+ * @brief PIO1 interrupt handler.
+ *
+ * @isr
+ */
+CH_IRQ_HANDLER(VectorA8) {
+
+ CH_IRQ_PROLOGUE();
+ ext_lld_serve_interrupt(&EXTD1);
+ CH_IRQ_EPILOGUE();
+}
+#endif
+
+#if LPC122x_EXT_USE_EXT2 || defined(__DOXYGEN__)
+/**
+ * @brief PIO2 interrupt handler.
+ *
+ * @isr
+ */
+CH_IRQ_HANDLER(VectorAC) {
+
+ CH_IRQ_PROLOGUE();
+ ext_lld_serve_interrupt(&EXTD2);
+ CH_IRQ_EPILOGUE();
+}
+#endif
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Enables EXTI IRQ sources.
+ *
+ * @notapi
+ */
+void ext_lld_exti_irq_enable(extirq_t irqn) {
+
+ uint32_t pmask;
+
+ switch (irqn) {
+ case EXTI0_IRQ:
+ pmask = LPC122x_EXT_EXTI0_IRQ_PRIORITY;
+ break;
+ case EXTI1_IRQ:
+ pmask = LPC122x_EXT_EXTI1_IRQ_PRIORITY;
+ break;
+ case EXTI2_IRQ:
+ pmask = LPC122x_EXT_EXTI2_IRQ_PRIORITY;
+ break;
+ }
+ nvicEnableVector(EINT0_IRQn + irqn, CORTEX_PRIORITY_MASK(pmask));
+
+}
+
+/**
+ * @brief Disables EXTI IRQ sources.
+ *
+ * @notapi
+ */
+void ext_lld_exti_irq_disable(extirq_t irqn) {
+
+ nvicDisableVector(EINT0_IRQn + irqn);
+}
+
+#endif /* HAL_USE_EXT */
+
+/** @} */
diff --git a/os/hal/platforms/LPC122x/ext_lld_isr.h b/os/hal/platforms/LPC122x/ext_lld_isr.h new file mode 100644 index 000000000..a201cce9b --- /dev/null +++ b/os/hal/platforms/LPC122x/ext_lld_isr.h @@ -0,0 +1,103 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+ LPC122x EXT driver - Copyright (C) 2013 Marcin Jokel
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file LPC122x/ext_lld_isr.h
+ * @brief LPC122x EXT subsystem low level driver ISR header.
+ *
+ * @addtogroup EXT
+ * @{
+ */
+
+#ifndef _EXT_LLD_ISR_H_
+#define _EXT_LLD_ISR_H_
+
+#if HAL_USE_EXT || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+#define EXTI0_IRQ 0
+#define EXTI1_IRQ 1
+#define EXTI2_IRQ 2
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @name Configuration options
+ * @{
+ */
+/**
+ * @brief EXTI0 interrupt priority level setting.
+ */
+#if !defined(LPC122x_EXT_EXTI0_IRQ_PRIORITY) || defined(__DOXYGEN__)
+#define LPC122x_EXT_EXTI0_IRQ_PRIORITY 3
+#endif
+
+/**
+ * @brief EXTI1 interrupt priority level setting.
+ */
+#if !defined(LPC122x_EXT_EXTI1_IRQ_PRIORITY) || defined(__DOXYGEN__)
+#define LPC122x_EXT_EXTI1_IRQ_PRIORITY 3
+#endif
+
+/**
+ * @brief EXTI2 interrupt priority level setting.
+ */
+#if !defined(LPC122x_EXT_EXTI2_IRQ_PRIORITY) || defined(__DOXYGEN__)
+#define LPC122x_EXT_EXTI2_IRQ_PRIORITY 3
+#endif
+
+/** @} */
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief EXT irq port identifier.
+ */
+typedef uint32_t extirq_t;
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void ext_lld_exti_irq_enable(extirq_t irqn);
+ void ext_lld_exti_irq_disable(extirq_t irqn);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_EXT */
+
+#endif /* _EXT_LLD_ISR_H_ */
+
+/** @} */
diff --git a/os/hal/platforms/LPC122x/i2c_lld.c b/os/hal/platforms/LPC122x/i2c_lld.c new file mode 100644 index 000000000..32055d4c2 --- /dev/null +++ b/os/hal/platforms/LPC122x/i2c_lld.c @@ -0,0 +1,438 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+ LPC122x I2C driver - Copyright (C) 2013 Marcin Jokel
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/*
+ Concepts and parts of this file have been contributed by Uladzimir Pylinsky
+ aka barthess.
+ */
+
+
+/**
+ * @file LPC122x/i2c_lld.h
+ * @brief LPC122x I2C subsystem low level driver header.
+ *
+ * @addtogroup I2C
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if HAL_USE_I2C || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/** @brief I2C1 driver identifier.*/
+I2CDriver I2CD1;
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Wakes up the waiting thread.
+ *
+ * @param[in] i2cp pointer to the @p I2CDriver object
+ * @param[in] msg wakeup message
+ *
+ * @notapi
+ */
+#define wakeup_isr(i2cp, msg) { \
+ chSysLockFromIsr(); \
+ if ((i2cp)->thread != NULL) { \
+ Thread *tp = (i2cp)->thread; \
+ (i2cp)->thread = NULL; \
+ tp->p_u.rdymsg = (msg); \
+ chSchReadyI(tp); \
+ } \
+ chSysUnlockFromIsr(); \
+}
+
+/**
+ * @brief Handling of stalled I2C transactions.
+ *
+ * @param[in] i2cp pointer to the @p I2CDriver object
+ *
+ * @notapi
+ */
+static void i2c_lld_safety_timeout(void *p) {
+ I2CDriver *i2cp = (I2CDriver *)p;
+
+ chSysLockFromIsr();
+ if (i2cp->thread) {
+ Thread *tp = i2cp->thread;
+ i2cp->thread = NULL;
+ tp->p_u.rdymsg = RDY_TIMEOUT;
+ chSchReadyI(tp);
+ }
+ chSysUnlockFromIsr();
+}
+
+/**
+ * @brief I2C error handler.
+ *
+ * @param[in] i2cp pointer to the @p I2CDriver object
+ *
+ * @notapi
+ */
+static void i2c_lld_serve_error_interrupt(I2CDriver *i2cp, uint32_t status) {
+ i2cflags_t error = 0;
+
+ switch (status) {
+ case I2C_STATE_ARB_LOST:
+ error = I2CD_ARBITRATION_LOST;
+ break;
+ case I2C_STATE_BUS_ERROR:
+ error = I2CD_BUS_ERROR;
+ break;
+ case I2C_STATE_MS_SLAR_NACK:
+ case I2C_STATE_MS_TDAT_NACK:
+ case I2C_STATE_MS_SLAW_NACK:
+ error = I2CD_ACK_FAILURE ;
+ break;
+ }
+
+ /* If some error has been identified then sends wakes the waiting thread.*/
+ i2cp->errors = error;
+ wakeup_isr(i2cp, RDY_RESET);
+}
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+/**
+ * @brief I2C1 event interrupt handler.
+ *
+ * @notapi
+ */
+CH_IRQ_HANDLER(Vector70) {
+ uint32_t status;
+
+ CH_IRQ_PROLOGUE();
+ status = LPC_I2C->STAT;
+ switch(status) {
+ case I2C_STATE_MS_START: /* A START condition has been transmitted. */
+ if (I2CD1.txbytes > 0) {
+ LPC_I2C->DAT = I2CD1.addr; /* Write slave address with WR bit. */
+ }
+ else {
+ LPC_I2C->DAT = I2CD1.addr | I2C_RD_BIT; /* Write slave address with RD bit. */
+ }
+
+ LPC_I2C->CONCLR = I2C_CONCLR_STAC | I2C_CONCLR_SIC; /* Clear START and SI bit. */
+ break;
+
+ case I2C_STATE_MS_SLAR_NACK: /* NOT ACK has been received, Master will be transmitted STOP. */
+ case I2C_STATE_MS_TDAT_NACK: /* NOT ACK has been received, Master will be transmitted STOP. */
+ case I2C_STATE_MS_SLAW_NACK: /* NOT ACK has been received, Master will be transmitted STOP. */
+ LPC_I2C->CONSET = I2C_CONSET_STO; /* Set STOP bit. */
+ LPC_I2C->CONCLR = I2C_CONCLR_SIC; /* Clear SI bit. */
+ i2c_lld_serve_error_interrupt(&I2CD1, status);
+ break;
+
+ case I2C_STATE_MS_SLAW_ACK: /* SLA + W has been transmitted, ACK has been received. */
+ case I2C_STATE_MS_TDAT_ACK: /* Data byte has been transmitted, ACK has been received. */
+ if (I2CD1.txbytes > 0) {
+ LPC_I2C->DAT = *I2CD1.txbuf++; /* Write data. */
+ I2CD1.txbytes--;
+ }
+ else {
+ if (I2CD1.rxbytes > 0) {
+ LPC_I2C->CONSET = I2C_CONSET_STO | I2C_CONSET_STA; /* Set START and STOP bit. */
+ } /* STOP bit will be transmit, then START bit. */
+ else {
+ LPC_I2C->CONSET = I2C_CONSET_STO; /* Set STOP bit. */
+ wakeup_isr(&I2CD1, RDY_OK);
+ }
+ }
+ LPC_I2C->CONCLR = I2C_CONCLR_SIC; /* Clear SI bit. */
+ break;
+
+ case I2C_STATE_MS_SLAR_ACK: /* SLA + R has been transmitted, ACK has been received. */
+ case I2C_STATE_MS_RDAT_ACK: /* Data byte has been received, ACK has been returned. */
+ if (status == I2C_STATE_MS_RDAT_ACK) {
+ *I2CD1.rxbuf++ = LPC_I2C->DAT; /* Read data */
+ I2CD1.rxbytes--;
+ }
+ if (I2CD1.rxbytes == 1) {
+ LPC_I2C->CONCLR = I2C_CONCLR_SIC | I2C_CONCLR_AAC; /* Clear SI and ACK bit. */
+ }
+ else {
+ LPC_I2C->CONSET = I2C_CONSET_AA; /* Set ACK bit. */
+ LPC_I2C->CONCLR = I2C_CONCLR_SIC; /* Clear SI bit. */
+ }
+ break;
+
+ case I2C_STATE_MS_RDAT_NACK: /* Data byte has been received, NOT ACK has been returned. */
+ *I2CD1.rxbuf++ = LPC_I2C->DAT; /* Read data. */
+ I2CD1.rxbytes--;
+ LPC_I2C->CONSET = I2C_CONSET_STO; /* Set STOP bit. */
+ LPC_I2C->CONCLR = I2C_CONCLR_SIC; /* Clear SI bit. */
+ wakeup_isr(&I2CD1, RDY_OK);
+ break;
+
+ case I2C_STATE_BUS_ERROR: /* Bus error. */
+ case I2C_STATE_ARB_LOST: /* Arbitration lost. */
+ LPC_I2C->CONCLR = I2C_CONCLR_SIC; /* Clear SI bit. */
+ i2c_lld_serve_error_interrupt(&I2CD1, status);
+ break;
+
+ }
+
+ CH_IRQ_EPILOGUE();
+}
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level I2C driver initialization.
+ *
+ * @notapi
+ */
+void i2c_lld_init(void) {
+
+ i2cObjectInit(&I2CD1);
+ I2CD1.thread = NULL;
+ I2CD1.i2c = LPC_I2C;
+
+ LPC_IOCON->PIO0_10 = 0x0482; /* Set I2C SCL pin function */
+ LPC_IOCON->PIO0_11 = 0x0482; /* Set I2C SDA pin function */
+}
+
+/**
+ * @brief Configures and activates the I2C peripheral.
+ *
+ * @param[in] i2cp pointer to the @p I2CDriver object
+ *
+ * @notapi
+ */
+void i2c_lld_start(I2CDriver *i2cp) {
+ uint32_t i2cscl;
+ uint32_t mulh, mull, div;
+ LPC_I2C_Type *dp = i2cp->i2c;
+
+ /* Make sure I2C peripheral is disabled */
+ dp->CONCLR = I2C_CONCLR_ENC;
+
+ /* If in stopped state then enables the I2C clock. */
+ if (i2cp->state == I2C_STOP) {
+
+ if (&I2CD1 == i2cp) {
+ LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 5); /* Enable clock. */
+ LPC_SYSCON->PRESETCTRL &= ~(1 << 1); /* Reset I2C peripheral.*/
+ __NOP();
+ LPC_SYSCON->PRESETCTRL |= (1 << 1);
+ nvicEnableVector(I2C_IRQn,
+ CORTEX_PRIORITY_MASK(LPC122x_I2C_IRQ_PRIORITY));
+ }
+
+ }
+
+ /* Setup I2C clock parameters.*/
+ i2cscl = (LPC122x_SYSCLK/(i2cp->config->clock_timing));
+ if (i2cp->config->mode == I2C_FAST_MODE) {
+ div = 19;
+ mull = 13;
+ mulh = 6;
+ } else if (i2cp->config->mode == I2C_FAST_MODE_PLUS) {
+ div = 3;
+ mull = 2;
+ mulh = 1;
+ } else { /* i2cp->config->mode == I2C_STANDARD_MODE */
+ div = 2;
+ mull = 1;
+ mulh = 1;
+ }
+
+ dp->SCLH = (mulh * i2cscl) / div;
+ dp->SCLL = (mull *i2cscl) / div;
+
+ /* Enable I2C.*/
+ dp->CONSET |= I2C_CONSET_EN;
+}
+
+/**
+ * @brief Deactivates the I2C peripheral.
+ *
+ * @param[in] i2cp pointer to the @p I2CDriver object
+ *
+ * @notapi
+ */
+void i2c_lld_stop(I2CDriver *i2cp) {
+
+ /* If not in stopped state then disables the I2C clock.*/
+ if (i2cp->state != I2C_STOP) {
+
+ /* I2C disable.*/
+ i2cp->i2c->CONCLR = I2C_CONCLR_ENC;
+
+ if (&I2CD1 == i2cp) {
+ nvicDisableVector(I2C_IRQn);
+ LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 5);
+ }
+ }
+}
+
+/**
+ * @brief Receives data via the I2C bus as master.
+ * @details Number of receiving bytes must be more than 1 on STM32F1x. This is
+ * hardware restriction.
+ *
+ * @param[in] i2cp pointer to the @p I2CDriver object
+ * @param[in] addr slave device address
+ * @param[out] rxbuf pointer to the receive buffer
+ * @param[in] rxbytes number of bytes to be received
+ * @param[in] timeout the number of ticks before the operation timeouts,
+ * the following special values are allowed:
+ * - @a TIME_INFINITE no timeout.
+ * .
+ * @return The operation status.
+ * @retval RDY_OK if the function succeeded.
+ * @retval RDY_RESET if one or more I2C errors occurred, the errors can
+ * be retrieved using @p i2cGetErrors().
+ * @retval RDY_TIMEOUT if a timeout occurred before operation end. <b>After a
+ * timeout the driver must be stopped and restarted
+ * because the bus is in an uncertain state</b>.
+ *
+ * @notapi
+ */
+msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
+ uint8_t *rxbuf, size_t rxbytes,
+ systime_t timeout) {
+ LPC_I2C_Type *dp = i2cp->i2c;
+ VirtualTimer vt;
+
+ i2cp->addr = addr << 1;
+ /* Global timeout for the whole operation.*/
+ if (timeout != TIME_INFINITE)
+ chVTSetI(&vt, timeout, i2c_lld_safety_timeout, (void *)i2cp);
+
+ /* Releases the lock from high level driver.*/
+ chSysUnlock();
+
+ /* Initializes driver fields */
+ i2cp->errors = 0;
+ i2cp->rxbuf = rxbuf;
+ i2cp->rxbytes = rxbytes;
+
+ /* This lock will be released in high level driver.*/
+ chSysLock();
+
+ /* Atomic check on the timer in order to make sure that a timeout didn't
+ happen outside the critical zone.*/
+ if ((timeout != TIME_INFINITE) && !chVTIsArmedI(&vt))
+ return RDY_TIMEOUT;
+
+ /* Starts the operation.*/
+ dp->CONSET = I2C_CONSET_STA;
+
+ /* Waits for the operation completion or a timeout.*/
+ i2cp->thread = chThdSelf();
+ chSchGoSleepS(THD_STATE_SUSPENDED);
+ if ((timeout != TIME_INFINITE) && chVTIsArmedI(&vt))
+ chVTResetI(&vt);
+
+ return chThdSelf()->p_u.rdymsg;
+}
+
+/**
+ * @brief Transmits data via the I2C bus as master.
+ * @details Number of receiving bytes must be 0 or more than 1 on STM32F1x.
+ * This is hardware restriction.
+ *
+ * @param[in] i2cp pointer to the @p I2CDriver object
+ * @param[in] addr slave device address
+ * @param[in] txbuf pointer to the transmit buffer
+ * @param[in] txbytes number of bytes to be transmitted
+ * @param[out] rxbuf pointer to the receive buffer
+ * @param[in] rxbytes number of bytes to be received
+ * @param[in] timeout the number of ticks before the operation timeouts,
+ * the following special values are allowed:
+ * - @a TIME_INFINITE no timeout.
+ * .
+ * @return The operation status.
+ * @retval RDY_OK if the function succeeded.
+ * @retval RDY_RESET if one or more I2C errors occurred, the errors can
+ * be retrieved using @p i2cGetErrors().
+ * @retval RDY_TIMEOUT if a timeout occurred before operation end. <b>After a
+ * timeout the driver must be stopped and restarted
+ * because the bus is in an uncertain state</b>.
+ *
+ * @notapi
+ */
+msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr,
+ const uint8_t *txbuf, size_t txbytes,
+ uint8_t *rxbuf, size_t rxbytes,
+ systime_t timeout) {
+ LPC_I2C_Type *dp = i2cp->i2c;
+ VirtualTimer vt;
+
+ i2cp->addr = addr << 1;
+ /* Global timeout for the whole operation.*/
+ if (timeout != TIME_INFINITE)
+ chVTSetI(&vt, timeout, i2c_lld_safety_timeout, (void *)i2cp);
+
+ /* Releases the lock from high level driver.*/
+ chSysUnlock();
+
+ /* Initializes driver fields */
+ i2cp->errors = 0;
+ i2cp->txbuf = txbuf;
+ i2cp->txbytes = txbytes;
+ i2cp->rxbuf = rxbuf;
+ i2cp->rxbytes = rxbytes;
+
+ /* This lock will be released in high level driver.*/
+ chSysLock();
+
+ /* Atomic check on the timer in order to make sure that a timeout didn't
+ happen outside the critical zone.*/
+ if ((timeout != TIME_INFINITE) && !chVTIsArmedI(&vt))
+ return RDY_TIMEOUT;
+
+ /* Starts the operation.*/
+ dp->CONSET = I2C_CONSET_STA;
+
+ /* Waits for the operation completion or a timeout.*/
+ i2cp->thread = chThdSelf();
+ chSchGoSleepS(THD_STATE_SUSPENDED);
+
+ if ((timeout != TIME_INFINITE) && chVTIsArmedI(&vt))
+ chVTResetI(&vt);
+
+ return chThdSelf()->p_u.rdymsg;
+}
+
+#endif /* HAL_USE_I2C */
+
+/** @} */
diff --git a/os/hal/platforms/LPC122x/i2c_lld.h b/os/hal/platforms/LPC122x/i2c_lld.h new file mode 100644 index 000000000..edff13a95 --- /dev/null +++ b/os/hal/platforms/LPC122x/i2c_lld.h @@ -0,0 +1,228 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+ LPC122x I2C driver - Copyright (C) 2013 Marcin Jokel
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+/*
+ Concepts and parts of this file have been contributed by Uladzimir Pylinsky
+ aka barthess.
+ */
+
+/**
+ * @file LPC122x/i2c_lld.h
+ * @brief LPC122x I2C subsystem low level driver header.
+ *
+ * @addtogroup I2C
+ * @{
+ */
+
+#ifndef _I2C_LLD_H_
+#define _I2C_LLD_H_
+
+#if HAL_USE_I2C || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+#define I2C_CONSET_AA 0x04 /* Assert acknowledge flag. */
+#define I2C_CONSET_SI 0x08 /* I2C interrupt flag. */
+#define I2C_CONSET_STO 0x10 /* STOP flag. */
+#define I2C_CONSET_STA 0x20 /* START flag. */
+#define I2C_CONSET_EN 0x40 /* I2C interface enable. */
+
+#define I2C_CONCLR_AAC 0x04 /* Assert acknowledge Clear bit. */
+#define I2C_CONCLR_SIC 0x08 /* I2C interrupt Clear bit. */
+#define I2C_CONCLR_STAC 0x20 /* START flag Clear bit. */
+#define I2C_CONCLR_ENC 0x40 /* I2C interface Disable bit. */
+
+#define I2C_WR_BIT 0x00
+#define I2C_RD_BIT 0x01
+
+#define I2C_STATE_MS_START 0x08
+#define I2C_STATE_MS_RSTART 0x10
+#define I2C_STATE_MS_SLAW_ACK 0x18
+#define I2C_STATE_MS_SLAW_NACK 0x20
+#define I2C_STATE_MS_TDAT_ACK 0x28
+#define I2C_STATE_MS_TDAT_NACK 0x30
+#define I2C_STATE_ARB_LOST 0x38
+
+#define I2C_STATE_MS_SLAR_ACK 0x40
+#define I2C_STATE_MS_SLAR_NACK 0x48
+#define I2C_STATE_MS_RDAT_ACK 0x50
+#define I2C_STATE_MS_RDAT_NACK 0x58
+
+#define I2C_STATE_BUS_ERROR 0x00
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+/**
+ * @name Configuration options
+ * @{
+ */
+
+/**
+ * @brief I2C interrupt priority level setting.
+ */
+#if !defined(LPC122x_I2C_IRQ_PRIORITY) || defined(__DOXYGEN__)
+#define LPC122x_I2C_IRQ_PRIORITY 3
+#endif
+
+/** @} */
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief Type representing I2C address.
+ */
+typedef uint16_t i2caddr_t;
+
+/**
+ * @brief I2C Driver condition flags type.
+ */
+typedef uint32_t i2cflags_t;
+/**
+ * @brief Supported modes for the I2C bus.
+ */
+typedef enum {
+ I2C_STANDARD_MODE = 1,
+ I2C_FAST_MODE = 2,
+ I2C_FAST_MODE_PLUS = 3
+} i2cmode_t;
+
+/**
+ * @brief Driver configuration structure.
+ */
+typedef struct {
+ i2cmode_t mode; /**< @brief Specifies the I2C mode. */
+ uint32_t clock_timing; /**< @brief Specifies the clock timing */
+} I2CConfig;
+
+/**
+ * @brief Type of a structure representing an I2C driver.
+ */
+typedef struct I2CDriver I2CDriver;
+
+/**
+ * @brief Structure representing an I2C driver.
+ */
+struct I2CDriver {
+ /**
+ * @brief Driver state.
+ */
+ i2cstate_t state;
+ /**
+ * @brief Current configuration data.
+ */
+ const I2CConfig *config;
+ /**
+ * @brief Error flags.
+ */
+ i2cflags_t errors;
+#if I2C_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)
+#if CH_USE_MUTEXES || defined(__DOXYGEN__)
+ /**
+ * @brief Mutex protecting the bus.
+ */
+ Mutex mutex;
+#elif CH_USE_SEMAPHORES
+ Semaphore semaphore;
+#endif
+#endif /* I2C_USE_MUTUAL_EXCLUSION */
+#if defined(I2C_DRIVER_EXT_FIELDS)
+ I2C_DRIVER_EXT_FIELDS
+#endif
+ /* End of the mandatory fields.*/
+ /**
+ * @brief Thread waiting for I/O completion.
+ */
+ Thread *thread;
+ /**
+ * @brief Current slave address without R/W bit.
+ */
+ i2caddr_t addr;
+ /**
+ * @brief Pointer to the transmit buffer.
+ */
+ const uint8_t *txbuf;
+ /**
+ * @brief Number of bytes to transmit.
+ */
+ size_t txbytes;
+ /**
+ * @brief Pointer to the receive buffer.
+ */
+ uint8_t *rxbuf;
+ /**
+ * @brief Number of bytes to receive.
+ */
+ size_t rxbytes;
+ /**
+ * @brief Pointer to the I2C registers block.
+ */
+ LPC_I2C_Type *i2c;
+};
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/**
+ * @brief Get errors from I2C driver.
+ *
+ * @param[in] i2cp pointer to the @p I2CDriver object
+ *
+ * @notapi
+ */
+#define i2c_lld_get_errors(i2cp) ((i2cp)->errors)
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#if !defined(__DOXYGEN__)
+extern I2CDriver I2CD1;
+#endif
+
+#endif /* !defined(__DOXYGEN__) */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void i2c_lld_init(void);
+ void i2c_lld_start(I2CDriver *i2cp);
+ void i2c_lld_stop(I2CDriver *i2cp);
+ msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr,
+ const uint8_t *txbuf, size_t txbytes,
+ uint8_t *rxbuf, size_t rxbytes,
+ systime_t timeout);
+ msg_t i2c_lld_master_receive_timeout(I2CDriver *i2cp, i2caddr_t addr,
+ uint8_t *rxbuf, size_t rxbytes,
+ systime_t timeout);
+#ifdef __cplusplus
+}
+#endif
+
+
+
+#endif /* _I2C_LLD_H_ */
+
+/** @} */
diff --git a/os/hal/platforms/LPC122x/platform.mk b/os/hal/platforms/LPC122x/platform.mk index dbf5aaf48..9a9853fbd 100644 --- a/os/hal/platforms/LPC122x/platform.mk +++ b/os/hal/platforms/LPC122x/platform.mk @@ -2,6 +2,11 @@ PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/LPC122x/hal_lld.c \
${CHIBIOS}/os/hal/platforms/LPC122x/gpt_lld.c \
${CHIBIOS}/os/hal/platforms/LPC122x/pal_lld.c \
+ ${CHIBIOS}/os/hal/platforms/LPC122x/ext_lld.c \
+ ${CHIBIOS}/os/hal/platforms/LPC122x/ext_lld_isr.c \
+ ${CHIBIOS}/os/hal/platforms/LPC122x/pwm_lld.c \
+ ${CHIBIOS}/os/hal/platforms/LPC122x/i2c_lld.c \
+ ${CHIBIOS}/os/hal/platforms/LPC122x/rtc_lld.c \
${CHIBIOS}/os/hal/platforms/LPC122x/serial_lld.c \
${CHIBIOS}/os/hal/platforms/LPC122x/spi_lld.c
diff --git a/os/hal/platforms/LPC122x/pwm_lld.c b/os/hal/platforms/LPC122x/pwm_lld.c new file mode 100644 index 000000000..24e5b2639 --- /dev/null +++ b/os/hal/platforms/LPC122x/pwm_lld.c @@ -0,0 +1,446 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+ LPC122x PWM driver - Copyright (C) 2013 Marcin Jokel
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file LPC122x/pwm_lld.c
+ * @brief LPC122x PWM subsystem low level driver header.
+ *
+ * @addtogroup PWM
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if HAL_USE_PWM || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/**
+ * @brief PWMD1 driver identifier.
+ * @note The driver PWMD1 allocates the complex timer TIM1 when enabled.
+ */
+#if LPC122x_PWM_USE_CT16B0 || defined(__DOXYGEN__)
+PWMDriver PWMD1;
+#endif
+
+/**
+ * @brief PWMD2 driver identifier.
+ * @note The driver PWMD2 allocates the timer TIM2 when enabled.
+ */
+#if LPC122x_PWM_USE_CT16B1 || defined(__DOXYGEN__)
+PWMDriver PWMD2;
+#endif
+
+/**
+ * @brief PWMD3 driver identifier.
+ * @note The driver PWMD3 allocates the timer TIM3 when enabled.
+ */
+#if LPC122x_PWM_USE_CT32B0 || defined(__DOXYGEN__)
+PWMDriver PWMD3;
+#endif
+
+/**
+ * @brief PWMD4 driver identifier.
+ * @note The driver PWMD4 allocates the timer TIM4 when enabled.
+ */
+#if LPC122x_PWM_USE_CT32B1 || defined(__DOXYGEN__)
+PWMDriver PWMD4;
+#endif
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+#if LPC122x_PWM_USE_CT16B0 || LPC122x_PWM_USE_CT16B1 || \
+ LPC122x_PWM_USE_CT32B0 || LPC122x_PWM_USE_CT32B1 || defined(__DOXYGEN__)
+/**
+ * @brief Common TIM2...TIM5 IRQ handler.
+ * @note It is assumed that the various sources are only activated if the
+ * associated callback pointer is not equal to @p NULL in order to not
+ * perform an extra check in a potentially critical interrupt handler.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ */
+static void pwm_lld_serve_interrupt(PWMDriver *pwmp) {
+ uint16_t sr;
+
+ sr = pwmp->tim->IR;
+ pwmp->tim->IR = sr;
+ if ((sr & IR_MR0INT) != 0)
+ pwmp->config->channels[0].callback(pwmp);
+ if ((sr & IR_MR1INT) != 0)
+ pwmp->config->channels[1].callback(pwmp);
+ if ((sr & IR_MR3INT) != 0)
+ pwmp->config->callback(pwmp);
+}
+#endif
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+#if LPC122x_PWM_USE_CT16B0 || defined(__DOXYGEN__)
+/**
+ * @brief CT16B0 interrupt handler.
+ *
+ * @isr
+ */
+CH_IRQ_HANDLER(Vector74) {
+
+ CH_IRQ_PROLOGUE();
+ pwm_lld_serve_interrupt(&PWMD1);
+ CH_IRQ_EPILOGUE();
+}
+
+#endif /* STM32_PWM_USE_TIM1 */
+
+#if LPC122x_PWM_USE_CT16B1 || defined(__DOXYGEN__)
+/**
+ * @brief CT16B1 interrupt handler.
+ *
+ * @isr
+ */
+CH_IRQ_HANDLER(Vector78) {
+
+ CH_IRQ_PROLOGUE();
+ pwm_lld_serve_interrupt(&PWMD2);
+ CH_IRQ_EPILOGUE();
+}
+#endif /* LPC122x_PWM_USE_CT16B1 */
+
+#if LPC122x_PWM_USE_CT32B0 || defined(__DOXYGEN__)
+/**
+ * @brief CT32B0 interrupt handler.
+ *
+ * @isr
+ */
+CH_IRQ_HANDLER(Vector7C) {
+
+ CH_IRQ_PROLOGUE();
+ pwm_lld_serve_interrupt(&PWMD3);
+ CH_IRQ_EPILOGUE();
+}
+#endif /* LPC122x_PWM_USE_CT32B0 */
+
+#if LPC122x_PWM_USE_CT32B1 || defined(__DOXYGEN__)
+/**
+ * @brief CT32B1 interrupt handler.
+ *
+ * @isr
+ */
+CH_IRQ_HANDLER(Vector80) {
+
+ CH_IRQ_PROLOGUE();
+ pwm_lld_serve_interrupt(&PWMD4);
+ CH_IRQ_EPILOGUE();
+}
+#endif /* LPC122x_PWM_USE_CT32B1 */
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level PWM driver initialization.
+ *
+ * @notapi
+ */
+void pwm_lld_init(void) {
+
+#if LPC122x_PWM_USE_CT16B0
+ /* Driver initialization.*/
+ pwmObjectInit(&PWMD1);
+ PWMD1.tim = LPC_CT16B0;
+
+#if LPC122x_PWM_USE_CT16B0_CH0
+#if LPC122x_PWM_CT16B0_CH0_SELECTOR == PWM_CT16B0_CH0_IS_PIO0_11
+ LPC_IOCON->PIO0_11 = 0x84;
+#elif LPC122x_PWM_CT16B0_CH0_SELECTOR == PWM_CT16B0_CH0_IS_PIO0_28
+ LPC_IOCON->PIO0_28 = 0x84;
+#else /* LPC122x_PWM_CT16B0_CH0_SELECTOR == PWM_CT16B0_CH0_IS_PIO2_0 */
+ LPC_IOCON->PIO2_0 = 0x84;
+#endif
+#endif
+
+#if LPC122x_PWM_USE_CT16B0_CH1
+#if LPC122x_PWM_CT16B0_CH1_SELECTOR == PWM_CT16B0_CH1_IS_PIO0_12
+ LPC_IOCON->PIO0_12 = 0x84;
+#elif LPC122x_PWM_CT16B0_CH1_SELECTOR == PWM_CT16B0_CH1_IS_PIO0_29
+ LPC_IOCON->PIO0_29 = 0x84;
+#else /* LPC122x_PWM_CT16B0_CH1_SELECTOR == PWM_CT16B0_CH1_IS_PIO2_1 */
+ LPC_IOCON->PIO2_1 = 0x83;
+#endif
+#endif
+#endif
+
+#if LPC122x_PWM_USE_CT16B1
+ /* Driver initialization.*/
+ pwmObjectInit(&PWMD2);
+ PWMD2.tim = LPC_CT16B1;
+
+#if LPC122x_PWM_USE_CT16B1_CH0
+#if LPC122x_PWM_CT16B1_CH0_SELECTOR == PWM_CT16B1_CH0_IS_PIO0_15
+ LPC_IOCON->PIO0_15 = 0x84;
+#elif LPC122x_PWM_CT16B1_CH0_SELECTOR == PWM_CT16B1_CH0_IS_PIO1_5
+ LPC_IOCON->PIO1_5 = 0x83;
+#else /* LPC122x_PWM_CT16B1_CH0_SELECTOR == PWM_CT16B1_CH0_IS_PIO2_2 */
+ LPC_IOCON->PIO2_2 = 0x83;
+#endif
+#endif
+
+#if LPC122x_PWM_USE_CT16B1_CH1
+#if LPC122x_PWM_CT16B1_CH1_SELECTOR == PWM_CT16B1_CH1_IS_PIO0_16
+ LPC_IOCON->PIO0_16 = 0x84;
+#elif LPC122x_PWM_CT16B1_CH1_SELECTOR == PWM_CT16B1_CH1_IS_PIO1_6
+ LPC_IOCON->PIO1_6 = 0x82;
+#else /* LPC122x_PWM_CT16B1_CH1_SELECTOR == PWM_CT16B1_CH1_IS_PIO2_3 */
+ LPC_IOCON->PIO2_3 = 0x83;
+#endif
+#endif
+#endif
+
+#if LPC122x_PWM_USE_CT32B0
+ /* Driver initialization.*/
+ pwmObjectInit(&PWMD3);
+ PWMD3.tim = LPC_CT32B0;
+
+#if LPC122x_PWM_USE_CT32B0_CH0
+#if LPC122x_PWM_CT32B0_CH0_SELECTOR == PWM_CT32B0_CH0_IS_PIO0_1
+ LPC_IOCON->PIO0_1 = 0x84;
+#elif LPC122x_PWM_CT32B0_CH0_SELECTOR == PWM_CT32B0_CH0_IS_PIO0_18
+ LPC_IOCON->PIO0_18 = 0x84;
+#else /* LPC122x_PWM_CT32B0_CH0_SELECTOR == PWM_CT32B0_CH0_IS_PIO2_4 */
+ LPC_IOCON->PIO2_4 = 0x83;
+#endif
+#endif
+
+#if LPC122x_PWM_USE_CT32B0_CH1
+#if LPC122x_PWM_CT32B0_CH1_SELECTOR == PWM_CT32B0_CH1_IS_PIO0_2
+ LPC_IOCON->PIO0_2 = 0x84;
+#elif LPC122x_PWM_CT32B0_CH1_SELECTOR == PWM_CT32B0_CH1_IS_PIO0_19
+ LPC_IOCON->PIO0_19 = 0x84;
+#else /* LPC122x_PWM_CT32B0_CH1_SELECTOR == PWM_CT32B0_CH1_IS_PIO2_5 */
+ LPC_IOCON->PIO2_5 = 0x83;
+#endif
+#endif
+#endif
+
+#if LPC122x_PWM_USE_CT32B1
+ /* Driver initialization.*/
+ pwmObjectInit(&PWMD4);
+ PWMD4.tim = LPC_CT32B1;
+
+#if LPC122x_PWM_USE_CT32B1_CH0
+#if LPC122x_PWM_CT32B1_CH0_SELECTOR == PWM_CT32B1_CH0_IS_PIO0_6
+ LPC_IOCON->PIO0_6 = 0x84;
+#elif LPC122x_PWM_CT32B1_CH0_SELECTOR == PWM_CT32B1_CH0_IS_PIO0_23
+ LPC_IOCON->PIO0_23 = 0x84;
+#else /* LPC122x_PWM_CT32B1_CH0_SELECTOR == PWM_CT32B1_CH0_IS_PIO2_8 */
+ LPC_IOCON->PIO2_8 = 0x83;
+#endif
+#endif
+
+#if LPC122x_PWM_USE_CT32B1_CH1
+#if LPC122x_PWM_CT32B1_CH1_SELECTOR == PWM_CT32B1_CH1_IS_PIO0_7
+ LPC_IOCON->PIO0_7 = 0x84;
+#elif LPC122x_PWM_CT32B1_CH1_SELECTOR == PWM_CT32B1_CH1_IS_PIO0_24
+ LPC_IOCON->PIO0_24 = 0x84;
+#else /* LPC122x_PWM_CT32B1_CH1_SELECTOR == PWM_CT32B1_CH1_IS_PIO2_9 */
+ LPC_IOCON->PIO2_9 = 0x83;
+#endif
+#endif
+#endif
+}
+
+/**
+ * @brief Configures and activates the PWM peripheral.
+ * @note Starting a driver that is already in the @p PWM_READY state
+ * disables all the active channels.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ *
+ * @notapi
+ */
+void pwm_lld_start(PWMDriver *pwmp) {
+ uint32_t pr;
+
+ if (pwmp->state == PWM_STOP) {
+ /* Clock activation and timer reset.*/
+#if LPC122x_PWM_USE_CT16B0
+ if (&PWMD1 == pwmp) {
+ LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 7);
+ nvicEnableVector(TIMER_16_0_IRQn, LPC122x_PWM_CT16B0_IRQ_PRIORITY);
+ }
+#endif
+#if LPC122x_PWM_USE_CT16B1
+ if (&PWMD2 == pwmp) {
+ LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 8);
+ nvicEnableVector(TIMER_16_1_IRQn, LPC122x_PWM_CT16B1_IRQ_PRIORITY);
+ }
+#endif
+#if LPC122x_PWM_USE_CT32B0
+ if (&PWMD3 == pwmp) {
+ LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 9);
+ nvicEnableVector(TIMER_32_0_IRQn, LPC122x_PWM_CT32B0_IRQ_PRIORITY);
+ }
+#endif
+#if LPC122x_PWM_USE_CT32B1
+ if (&PWMD4 == pwmp) {
+ LPC_SYSCON->SYSAHBCLKCTRL |= (1 << 10);
+ nvicEnableVector(TIMER_32_1_IRQn, LPC122x_PWM_CT32B1_IRQ_PRIORITY);
+ }
+#endif
+ }
+ else {
+ /* Driver re-configuration scenario, it must be stopped first.*/
+ pwmp->tim->TCR = 0;
+ }
+
+ /* Output enables and polarities setup.*/
+ if(pwmp->config->channels[0].mode == PWM_OUTPUT_ACTIVE_LOW)
+ pwmp->tim->PWMC = (1 << 0);
+
+ if(pwmp->config->channels[1].mode == PWM_OUTPUT_ACTIVE_LOW)
+ pwmp->tim->PWMC |= (1 << 1);
+
+ /* Timer configured and started.*/
+ pr = (uint16_t)((LPC122x_SYSCLK / pwmp->config->frequency) - 1);
+ chDbgAssert(((uint32_t)(pr + 1) * pwmp->config->frequency) == LPC122x_SYSCLK,
+ "pwm_lld_start(), #1", "invalid frequency");
+
+ pwmp->tim->TC = 0;
+ pwmp->tim->PR = pr;
+ pwmp->tim->IR = 0xFF;
+ pwmp->tim->MCR = MCR_MR3R; /* Reset on Match3 */
+ pwmp->tim->MR3 = pwmp->config->period;
+
+ if (pwmp->config->callback != NULL)
+ pwmp->tim->MCR |= MCR_MR3I;
+
+ pwmp->tim->TCR = 1; /* Timer start */
+}
+
+/**
+ * @brief Deactivates the PWM peripheral.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ *
+ * @notapi
+ */
+void pwm_lld_stop(PWMDriver *pwmp) {
+
+ /* If in ready state then disables the PWM clock.*/
+ if (pwmp->state == PWM_READY) {
+ pwmp->tim->TCR = 0; /* Timer disabled. */
+ pwmp->tim->MCR = 0; /* All IRQs disabled. */
+ pwmp->tim->IR = 0xFF; /* Clear eventual pending IRQs. */
+ pwmp->tim->PWMC = 0; /* PWM outputs disable */
+
+#if LPC122x_PWM_USE_CT16B0
+ if (&PWMD1 == pwmp) {
+ nvicDisableVector(TIMER_16_0_IRQn);
+ LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 7);
+ }
+#endif
+#if LPC122x_PWM_USE_CT16B1
+ if (&PWMD2 == pwmp) {
+ nvicDisableVector(TIMER_16_1_IRQn);
+ LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 8);
+ }
+#endif
+#if LPC122x_PWM_USE_CT32B0
+ if (&PWMD3 == pwmp) {
+ nvicDisableVector(TIMER_32_0_IRQn);
+ LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 9);
+ }
+#endif
+#if LPC122x_PWM_USE_CT32B1
+ if (&PWMD4 == pwmp) {
+ nvicDisableVector(TIMER_32_1_IRQn);
+ LPC_SYSCON->SYSAHBCLKCTRL &= ~(1 << 10);
+ }
+#endif
+ }
+}
+
+/**
+ * @brief Enables a PWM channel.
+ * @pre The PWM unit must have been activated using @p pwmStart().
+ * @post The channel is active using the specified configuration.
+ * @note The function has effect at the next cycle start.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ * @param[in] channel PWM channel identifier (0...PWM_CHANNELS-1)
+ * @param[in] width PWM pulse width as clock pulses number
+ *
+ * @notapi
+ */
+void pwm_lld_enable_channel(PWMDriver *pwmp,
+ pwmchannel_t channel,
+ pwmcnt_t width) {
+
+ pwmp->tim->MCR &= ~(7 << (channel * 3));
+
+ if ( channel == 0)
+ pwmp->tim->MR0 = width; /* New duty cycle. */
+ else
+ pwmp->tim->MR1 = width; /* New duty cycle. */
+ /* If there is a callback defined for the channel then the associated
+ interrupt must be enabled.*/
+ if (pwmp->config->channels[channel].callback != NULL) {
+ pwmp->tim->IR = (1 << channel); /* Clear interrupt flag*/
+ pwmp->tim->MCR |= (1 << (channel * 3)); /* Set interrupt on selected channel */
+ }
+
+}
+
+/**
+ * @brief Disables a PWM channel.
+ * @pre The PWM unit must have been activated using @p pwmStart().
+ * @post The channel is disabled and its output line returned to the
+ * idle state.
+ * @note The function has effect at the next cycle start.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ * @param[in] channel PWM channel identifier (0...PWM_CHANNELS-1)
+ *
+ * @notapi
+ */
+void pwm_lld_disable_channel(PWMDriver *pwmp, pwmchannel_t channel) {
+
+ if ( channel == 0)
+ pwmp->tim->MR0 = 0;
+ else
+ pwmp->tim->MR1 = 0;
+ pwmp->tim->MCR &= ~(7 << (channel * 3));
+ pwmp->tim->IR = (1 << channel);
+}
+
+#endif /* HAL_USE_PWM */
+
+/** @} */
diff --git a/os/hal/platforms/LPC122x/pwm_lld.h b/os/hal/platforms/LPC122x/pwm_lld.h new file mode 100644 index 000000000..d0d54d234 --- /dev/null +++ b/os/hal/platforms/LPC122x/pwm_lld.h @@ -0,0 +1,455 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+ LPC122x PWM driver - Copyright (C) 2013 Marcin Jokel
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+
+/**
+ * @file LPC122x/pwm_lld.h
+ * @brief LPC122x PWM subsystem low level driver header.
+ *
+ * @addtogroup PWM
+ * @{
+ */
+
+#ifndef _PWM_LLD_H_
+#define _PWM_LLD_H_
+
+#if HAL_USE_PWM || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Unsupported modes and specific modes */
+/*===========================================================================*/
+#undef PWM_OUTPUT_ACTIVE_HIGH
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+#define IR_MR0INT (1 << 0)
+#define IR_MR1INT (1 << 1)
+#define IR_MR2INT (1 << 2)
+#define IR_MR3INT (1 << 3)
+#define IR_CR0INT (1 << 4)
+#define IR_CR1INT (1 << 5)
+#define IR_CR2INT (1 << 6)
+#define IR_CR3INT (1 << 7)
+
+#define MCR_MR3I (1 << 9)
+#define MCR_MR3R (1 << 10)
+#define MCR_MR3S (1 << 11)
+
+/**
+ * @brief Number of PWM channels per PWM driver.
+ */
+#define PWM_CHANNELS 2
+
+#define PWM_CT16B0_CH0_IS_PIO0_11 0
+#define PWM_CT16B0_CH0_IS_PIO0_28 1
+#define PWM_CT16B0_CH0_IS_PIO2_0 2
+
+#define PWM_CT16B0_CH1_IS_PIO0_12 0
+#define PWM_CT16B0_CH1_IS_PIO0_29 1
+#define PWM_CT16B0_CH1_IS_PIO2_1 2
+
+#define PWM_CT16B1_CH0_IS_PIO0_15 0
+#define PWM_CT16B1_CH0_IS_PIO1_5 1
+#define PWM_CT16B1_CH0_IS_PIO2_2 2
+
+#define PWM_CT16B1_CH1_IS_PIO0_16 0
+#define PWM_CT16B1_CH1_IS_PIO1_6 1
+#define PWM_CT16B1_CH1_IS_PIO2_3 2
+
+
+#define PWM_CT32B0_CH0_IS_PIO0_1 0
+#define PWM_CT32B0_CH0_IS_PIO0_18 1
+#define PWM_CT32B0_CH0_IS_PIO2_4 2
+
+#define PWM_CT32B0_CH1_IS_PIO0_2 0
+#define PWM_CT32B0_CH1_IS_PIO0_19 1
+#define PWM_CT32B0_CH1_IS_PIO2_5 2
+
+
+#define PWM_CT32B1_CH0_IS_PIO0_6 0
+#define PWM_CT32B1_CH0_IS_PIO0_23 1
+#define PWM_CT32B1_CH0_IS_PIO2_8 2
+
+#define PWM_CT32B1_CH1_IS_PIO0_7 0
+#define PWM_CT32B1_CH1_IS_PIO0_24 1
+#define PWM_CT32B1_CH1_IS_PIO2_9 2
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @name Configuration options
+ * @{
+ */
+
+/**
+ * @brief PWMD1 driver enable switch.
+ * @details If set to @p TRUE the support for PWMD1 is included.
+ * @note The default is @p TRUE.
+ */
+#if !defined(LPC122x_PWM_USE_CT16B0) || defined(__DOXYGEN__)
+#define LPC122x_PWM_USE_CT16B0 FALSE
+#endif
+
+/**
+ * @brief PWMD2 driver enable switch.
+ * @details If set to @p TRUE the support for PWMD2 is included.
+ * @note The default is @p TRUE.
+ */
+#if !defined(LPC122x_PWM_USE_CT16B1) || defined(__DOXYGEN__)
+#define LPC122x_PWM_USE_CT16B1 FALSE
+#endif
+
+/**
+ * @brief PWMD3 driver enable switch.
+ * @details If set to @p TRUE the support for PWMD3 is included.
+ * @note The default is @p TRUE.
+ */
+#if !defined(LPC122x_PWM_USE_CT32B0) || defined(__DOXYGEN__)
+#define LPC122x_PWM_USE_CT32B0 FALSE
+#endif
+
+/**
+ * @brief PWMD4 driver enable switch.
+ * @details If set to @p TRUE the support for PWMD4 is included.
+ * @note The default is @p TRUE.
+ */
+#if !defined(LPC122x_PWM_USE_CT32B1) || defined(__DOXYGEN__)
+#define LPC122x_PWM_USE_CT32B1 FALSE
+#endif
+
+/**
+ * @brief PWMD1 Channel 0 driver enable switch.
+ * @details If set to @p TRUE PWMD1 Channel 0 is enabled.
+ * @note The default is @p FALSE.
+ */
+#if !defined(LPC122x_PWM_USE_CT16B0_CH0) || defined(__DOXYGEN__)
+#define LPC122x_PWM_USE_CT16B0_CH0 FALSE
+#endif
+
+/**
+ * @brief PWMD1 Channel 1 driver enable switch.
+ * @details If set to @p TRUE PWMD1 Channel 1 is enabled.
+ * @note The default is @p FALSE.
+ */
+#if !defined(LPC122x_PWM_USE_CT16B0_CH1) || defined(__DOXYGEN__)
+#define LPC122x_PWM_USE_CT16B0_CH1 FALSE
+#endif
+
+/**
+ * @brief PWMD2 Channel 0 driver enable switch.
+ * @details If set to @p TRUE PWMD2 Channel 0 is enabled.
+ * @note The default is @p FALSE.
+ */
+#if !defined(LPC122x_PWM_USE_CT16B1_CH0) || defined(__DOXYGEN__)
+#define LPC122x_PWM_USE_CT16B1_CH0 FALSE
+#endif
+
+/**
+ * @brief PWMD2 Channel 1 driver enable switch.
+ * @details If set to @p TRUE PWMD2 Channel 1 is enabled.
+ * @note The default is @p FALSE.
+ */
+#if !defined(LPC122x_PWM_USE_CT16B1_CH1) || defined(__DOXYGEN__)
+#define LPC122x_PWM_USE_CT16B1_CH1 FALSE
+#endif
+
+/**
+ * @brief PWMD3 Channel 0 driver enable switch.
+ * @details If set to @p TRUE PWMD3 Channel 0 is enabled.
+ * @note The default is @p FALSE.
+ */
+#if !defined(LPC122x_PWM_USE_CT32B0_CH0) || defined(__DOXYGEN__)
+#define LPC122x_PWM_USE_CT32B0_CH0 FALSE
+#endif
+
+/**
+ * @brief PWMD3 Channel 1 driver enable switch.
+ * @details If set to @p TRUE PWMD3 Channel 1 is enabled.
+ * @note The default is @p FALSE.
+ */
+#if !defined(LPC122x_PWM_USE_CT32B0_CH1) || defined(__DOXYGEN__)
+#define LPC122x_PWM_USE_CT32B0_CH1 FALSE
+#endif
+
+/**
+ * @brief PWMD4 Channel 0 driver enable switch.
+ * @details If set to @p TRUE PWMD4 Channel 0 is enabled.
+ * @note The default is @p FALSE.
+ */
+#if !defined(LPC122x_PWM_USE_CT32B1_CH0) || defined(__DOXYGEN__)
+#define LPC122x_PWM_USE_CT32B1_CH0 FALSE
+#endif
+
+/**
+ * @brief PWMD4 Channel 1 driver enable switch.
+ * @details If set to @p TRUE PWMD4 Channel 1 is enabled.
+ * @note The default is @p FALSE.
+ */
+#if !defined(LPC122x_PWM_USE_CT32B1_CH1) || defined(__DOXYGEN__)
+#define LPC122x_PWM_USE_CT32B1_CH1 FALSE
+#endif
+/**
+ * @brief PWMD1 interrupt priority level setting.
+ */
+#if !defined(LPC122x_PWM_CT16B0_IRQ_PRIORITY) || defined(__DOXYGEN__)
+#define LPC122x_PWM_CT16B0_IRQ_PRIORITY 3
+#endif
+
+/**
+ * @brief PWMD2 interrupt priority level setting.
+ */
+#if !defined(LPC122x_PWM_CT16B1_IRQ_PRIORITY) || defined(__DOXYGEN__)
+#define LPC122x_PWM_CT16B1_IRQ_PRIORITY 3
+#endif
+
+/**
+ * @brief PWMD3 interrupt priority level setting.
+ */
+#if !defined(LPC122x_PWM_CT32B0_IRQ_PRIORITY) || defined(__DOXYGEN__)
+#define LPC122x_PWM_CT32B0_IRQ_PRIORITY 3
+#endif
+
+/**
+ * @brief PWMD4 interrupt priority level setting.
+ */
+#if !defined(LPC122x_PWM_CT32B1_IRQ_PRIORITY) || defined(__DOXYGEN__)
+#define LPC122x_PWM_CT32B1_IRQ_PRIORITY 3
+#endif
+
+/**
+ * @brief PWM_CT16B0_CH0 signal selector.
+ */
+#if !defined(LPC122x_PWM_CT16B0_CH0_SELECTOR) || defined(__DOXYGEN__)
+#define LPC122x_PWM_CT16B0_CH0_SELECTOR PWM_CT16B0_CH0_IS_PIO0_11
+#endif
+
+/**
+ * @brief PWM_CT16B0_CH1 signal selector.
+ */
+#if !defined(LPC122x_PWM_CT16B0_CH1_SELECTOR) || defined(__DOXYGEN__)
+#define LPC122x_PWM_CT16B0_CH1_SELECTOR PWM_CT16B0_CH1_IS_PIO0_12
+#endif
+
+/**
+ * @brief PWM_CT16B1_CH0 signal selector.
+ */
+#if !defined(LPC122x_PWM_CT16B1_CH0_SELECTOR) || defined(__DOXYGEN__)
+#define LPC122x_PWM_CT16B1_CH0_SELECTOR PWM_CT16B1_CH0_IS_PIO0_15
+#endif
+
+/**
+ * @brief PWM_CT16B1_CH1 signal selector.
+ */
+#if !defined(LPC122x_PWM_CT16B1_CH1_SELECTOR) || defined(__DOXYGEN__)
+#define LPC122x_PWM_CT16B1_CH1_SELECTOR PWM_CT16B1_CH1_IS_PIO0_16
+#endif
+
+/**
+ * @brief PWM_CT32B0_CH0 signal selector.
+ */
+#if !defined(LPC122x_PWM_CT32B0_CH0_SELECTOR) || defined(__DOXYGEN__)
+#define LPC122x_PWM_CT32B0_CH0_SELECTOR PWM_CT32B0_CH0_IS_PIO0_1
+#endif
+
+/**
+ * @brief PWM_CT32B0_CH1 signal selector.
+ */
+#if !defined(LPC122x_PWM_CT32B0_CH1_SELECTOR) || defined(__DOXYGEN__)
+#define LPC122x_PWM_CT32B0_CH1_SELECTOR PWM_CT32B0_CH1_IS_PIO0_2
+#endif
+
+/**
+ * @brief PWM_CT32B1_CH0 signal selector.
+ */
+#if !defined(LPC122x_PWM_CT32B1_CH0_SELECTOR) || defined(__DOXYGEN__)
+#define LPC122x_PWM_CT32B1_CH0_SELECTOR PWM_CT32B1_CH0_IS_PIO0_6
+#endif
+
+/**
+ * @brief PWM_CT32B1_CH1 signal selector.
+ */
+#if !defined(LPC122x_PWM_CT32B1_CH1_SELECTOR) || defined(__DOXYGEN__)
+#define LPC122x_PWM_CT32B1_CH1_SELECTOR PWM_CT32B1_CH1_IS_PIO0_7
+#endif
+
+/*===========================================================================*/
+/* Configuration checks. */
+/*===========================================================================*/
+
+
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief PWM mode type.
+ */
+typedef uint32_t pwmmode_t;
+
+/**
+ * @brief PWM channel type.
+ */
+typedef uint8_t pwmchannel_t;
+
+/**
+ * @brief PWM counter type.
+ */
+typedef uint16_t pwmcnt_t;
+
+/**
+ * @brief PWM driver channel configuration structure.
+ */
+typedef struct {
+ /**
+ * @brief Channel active logic level.
+ */
+ pwmmode_t mode;
+ /**
+ * @brief Channel callback pointer.
+ * @note This callback is invoked on the channel compare event. If set to
+ * @p NULL then the callback is disabled.
+ */
+ pwmcallback_t callback;
+ /* End of the mandatory fields.*/
+} PWMChannelConfig;
+
+/**
+ * @brief PWM driver configuration structure.
+ */
+typedef struct {
+ /**
+ * @brief Timer clock in Hz.
+ * @note The low level can use assertions in order to catch invalid
+ * frequency specifications.
+ */
+ uint32_t frequency;
+ /**
+ * @brief PWM period in ticks.
+ * @note The low level can use assertions in order to catch invalid
+ * period specifications.
+ */
+ pwmcnt_t period;
+ /**
+ * @brief Periodic callback pointer.
+ * @note This callback is invoked on PWM counter reset. If set to
+ * @p NULL then the callback is disabled.
+ */
+ pwmcallback_t callback;
+ /**
+ * @brief Channels configurations.
+ */
+ PWMChannelConfig channels[PWM_CHANNELS];
+ /* End of the mandatory fields.*/
+
+} PWMConfig;
+
+/**
+ * @brief Structure representing a PWM driver.
+ */
+struct PWMDriver {
+ /**
+ * @brief Driver state.
+ */
+ pwmstate_t state;
+ /**
+ * @brief Current driver configuration data.
+ */
+ const PWMConfig *config;
+ /**
+ * @brief Current PWM period in ticks.
+ */
+ pwmcnt_t period;
+#if defined(PWM_DRIVER_EXT_FIELDS)
+ PWM_DRIVER_EXT_FIELDS
+#endif
+ /* End of the mandatory fields.*/
+ /**
+ * @brief Timer base clock.
+ */
+ uint32_t clock;
+ /**
+ * @brief Pointer to the TIMx registers block.
+ */
+ LPC_CTxxBx_Type *tim;
+};
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/**
+ * @brief Changes the period the PWM peripheral.
+ * @details This function changes the period of a PWM unit that has already
+ * been activated using @p pwmStart().
+ * @pre The PWM unit must have been activated using @p pwmStart().
+ * @post The PWM unit period is changed to the new value.
+ * @note The function has effect at the next cycle start.
+ * @note If a period is specified that is shorter than the pulse width
+ * programmed in one of the channels then the behavior is not
+ * guaranteed.
+ *
+ * @param[in] pwmp pointer to a @p PWMDriver object
+ * @param[in] period new cycle time in ticks
+ *
+ * @notapi
+ */
+#define pwm_lld_change_period(pwmp, period) \
+ ((pwmp)->tim->MR3 = (period))
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#if LPC122x_PWM_USE_CT16B0 && !defined(__DOXYGEN__)
+extern PWMDriver PWMD1;
+#endif
+
+#if LPC122x_PWM_USE_CT16B1 && !defined(__DOXYGEN__)
+extern PWMDriver PWMD2;
+#endif
+
+#if LPC122x_PWM_USE_CT32B0 && !defined(__DOXYGEN__)
+extern PWMDriver PWMD3;
+#endif
+
+#if LPC122x_PWM_USE_CT32B1 && !defined(__DOXYGEN__)
+extern PWMDriver PWMD4;
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void pwm_lld_init(void);
+ void pwm_lld_start(PWMDriver *pwmp);
+ void pwm_lld_stop(PWMDriver *pwmp);
+ void pwm_lld_enable_channel(PWMDriver *pwmp,
+ pwmchannel_t channel,
+ pwmcnt_t width);
+ void pwm_lld_disable_channel(PWMDriver *pwmp, pwmchannel_t channel);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_PWM */
+
+#endif /* _PWM_LLD_H_ */
+
+/** @} */
diff --git a/os/hal/platforms/LPC122x/rtc_lld.c b/os/hal/platforms/LPC122x/rtc_lld.c new file mode 100644 index 000000000..ad1a15f80 --- /dev/null +++ b/os/hal/platforms/LPC122x/rtc_lld.c @@ -0,0 +1,259 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+ LPC122x RTC driver - Copyright (C) 2013 Marcin Jokel
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+/*
+ Concepts and parts of this file have been contributed by Uladzimir Pylinsky
+ aka barthess.
+ */
+
+/**
+ * @file LPC122x/rtc_lld.c
+ * @brief LPC122x RTC low level driver.
+ *
+ * @addtogroup RTC
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if HAL_USE_RTC || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/**
+ * @brief RTC driver identifier.
+ */
+RTCDriver RTCD1;
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/**
+ * @brief RTC interrupt handler.
+ *
+ * @isr
+ */
+
+#if LPC122x_RTC_USE_ALARM || defined(__DOXYGEN__)
+CH_IRQ_HANDLER(VectorB8) {
+ uint32_t flag;
+
+ CH_IRQ_PROLOGUE();
+
+ flag = LPC_RTC->RIS;
+ LPC_RTC->ICR = flag; /* Clear interrupt flag */
+
+ if ((flag & RIS_RTCRIS) && (RTCD1.callback != NULL))
+ RTCD1.callback(&RTCD1, RTC_EVENT_ALARM);
+
+ CH_IRQ_EPILOGUE();
+}
+#endif
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Enable access to registers.
+ *
+ * @api
+ */
+void rtc_lld_init(void) {
+ uint32_t temp[2];
+
+ if(LPC_SYSCON->SYSRESSTAT & 0x1) { /* POR detected */
+
+ LPC_SYSCON->SYSAHBCLKCTRL &= ~(1UL << 19); /* Disable clock for RTC */
+ LPC_PMU->SYSCFG &= ~(0x0FUL << 11); /* Clear RTC clock source */
+ LPC_SYSCON->RTCCLKDIV = LPC122x_RTC_CLKDIV;
+ LPC_PMU->SYSCFG |= (LPC122x_RTCCLK << 11); /* Set RTC clock source */
+ LPC_SYSCON->SYSAHBCLKCTRL |= (1UL << 19); /* Enable clock for RTC registers*/
+ LPC_RTC->ICR = 0x01; /* Clear interrupt flag */
+ LPC_RTC->CR= 1; /* Enable RTC start */
+ LPC_SYSCON->SYSRESSTAT = 0x1; /* Clear POR flag */
+
+ while(LPC_RTC->DR <3 ) { /* Wait, data read not valid */
+ __NOP();
+ }
+ }
+ else {
+
+ LPC_SYSCON->SYSAHBCLKCTRL |= (1UL << 19); /* Enable clock for RTC registers*/
+
+ do {
+ temp[0] = LPC_RTC->DR;
+ temp[1] = LPC_RTC->DR;
+ } while(temp[0] == temp[1]);
+
+#if LPC122x_RTC_USE_ALARM
+ if (temp[1] >= LPC_RTC->MR) { /* Check for match event in software, handle if found */
+ CH_IRQ_HANDLER(VectorB8); /* Manually invoke ISR */
+ }
+#endif
+
+ }
+
+#if LPC122x_RTC_USE_ALARM
+ nvicEnableVector(RTC_IRQn, CORTEX_PRIORITY_MASK(LPC122x_RTC_IRQ_PRIORITY));
+#endif
+ return;
+}
+
+/**
+ * @brief Set current time.
+ * @note Fractional part will be silently ignored. There is no possibility
+ * to set it on STM32 platform.
+ *
+ * @param[in] rtcp pointer to RTC driver structure
+ * @param[in] timespec pointer to a @p RTCTime structure
+ *
+ * @api
+ */
+void rtc_lld_set_time(RTCDriver *rtcp, const RTCTime *timespec) {
+ (void)rtcp;
+
+ LPC_RTC->LR = timespec->tv_sec;
+}
+
+/**
+ * @brief Get current time.
+ *
+ * @param[in] rtcp pointer to RTC driver structure
+ * @param[out] timespec pointer to a @p RTCTime structure
+ *
+ * @api
+ */
+void rtc_lld_get_time(RTCDriver *rtcp, RTCTime *timespec) {
+ (void)rtcp;
+
+ timespec->tv_sec = LPC_RTC->DR;
+}
+
+/**
+ * @brief Set alarm time.
+ *
+ * @note Default value after BKP domain reset for both comparators is 0.
+ * @note Function does not performs any checks of alarm time validity.
+ *
+ * @param[in] rtcp Pointer to RTC driver structure.
+ * @param[in] alarm Alarm identifier. Can be 1 or 2.
+ * @param[in] alarmspec Pointer to a @p RTCAlarm structure.
+ *
+ * @api
+ */
+void rtc_lld_set_alarm(RTCDriver *rtcp,
+ rtcalarm_t alarm,
+ const RTCAlarm *alarmspec) {
+ (void)rtcp;
+ (void)alarm;
+ LPC_RTC->MR = alarmspec->tv_sec;
+
+}
+
+/**
+ * @brief Get alarm time.
+ *
+ * @param[in] rtcp pointer to RTC driver structure
+ * @param[in] alarm alarm identifier
+ * @param[out] alarmspec pointer to a @p RTCAlarm structure
+ *
+ * @api
+ */
+void rtc_lld_get_alarm(RTCDriver *rtcp,
+ rtcalarm_t alarm,
+ RTCAlarm *alarmspec) {
+ (void)rtcp;
+ (void)alarm;
+ alarmspec->tv_sec = LPC_RTC->MR;
+
+}
+
+/**
+ * @brief Enables or disables RTC callbacks.
+ * @details This function enables or disables callbacks, use a @p NULL pointer
+ * in order to disable a callback.
+ *
+ * @param[in] rtcp pointer to RTC driver structure
+ * @param[in] callback callback function pointer or @p NULL
+ *
+ * @notapi
+ */
+void rtc_lld_set_callback(RTCDriver *rtcp, rtccb_t callback) {
+
+ LPC_RTC->ICR = 0x01; /* Clear interrupt flag */
+
+ if (callback != NULL) {
+
+ /* IRQ sources enabled only after setting up the callback.*/
+ rtcp->callback = callback;
+ LPC_RTC->ICSC = ICSC_RTCCIC; /* Enable RTC interrupt */
+ }
+ else {
+
+ LPC_RTC->ICSC = 0; /* Disable RTC interrupt */
+
+ /* Callback set to NULL only after disabling the IRQ sources.*/
+ rtcp->callback = NULL;
+ }
+}
+
+#include "chrtclib.h"
+
+/**
+ * @brief Get current time in format suitable for usage in FatFS.
+ *
+ * @param[in] rtcp pointer to RTC driver structure
+ * @return FAT time value.
+ *
+ * @api
+ */
+uint32_t rtc_lld_get_time_fat(RTCDriver *rtcp) {
+ uint32_t fattime;
+ struct tm timp;
+
+ rtcGetTimeTm(rtcp, &timp);
+
+ fattime = (timp.tm_sec) >> 1;
+ fattime |= (timp.tm_min) << 5;
+ fattime |= (timp.tm_hour) << 11;
+ fattime |= (timp.tm_mday) << 16;
+ fattime |= (timp.tm_mon + 1) << 21;
+ fattime |= (timp.tm_year - 80) << 25;
+
+ return fattime;
+}
+
+#endif /* HAL_USE_RTC */
+
+/** @} */
diff --git a/os/hal/platforms/LPC122x/rtc_lld.h b/os/hal/platforms/LPC122x/rtc_lld.h new file mode 100644 index 000000000..b3d3b48ff --- /dev/null +++ b/os/hal/platforms/LPC122x/rtc_lld.h @@ -0,0 +1,236 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+ LPC122x RTC driver - Copyright (C) 2013 Marcin Jokel
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+*/
+/*
+ Concepts and parts of this file have been contributed by Uladzimir Pylinsky
+ aka barthess.
+ */
+
+/**
+ * @file LPC122x/rtc_lld.h
+ * @brief LPC122x RTC low level driver header.
+ *
+ * @addtogroup RTC
+ * @{
+ */
+
+#ifndef _RTC_LLD_H_
+#define _RTC_LLD_H_
+
+#if HAL_USE_RTC || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+#define CR_RTCSTART 1
+#define ICSC_RTCCIC 1
+#define RIS_RTCRIS 1
+#define MIS_RTCMIS 1
+#define ICR_RTCICR 1
+
+/**
+ * @brief This RTC implementation supports callbacks.
+ */
+#define RTC_SUPPORTS_CALLBACKS TRUE
+
+/**
+ * @brief One alarm comparator available.
+ */
+#define RTC_ALARMS 1
+
+/**
+ * @brief RTC Clock source type
+ */
+#define SYSCFG_RTCCLK_1Hz 0 /* 1 Hz clock */
+#define SYSCFG_RTCCLK_DEL_1Hz 1 /* delayed 1 Hz clock */
+#define SYSCFG_RTCCLK_1kHz 10 /* 1 kHz clock */
+#define SYSCFG_RTCCLK_PCLK 4 /* Main clock source divided by RTC */
+ /* clock divider */
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @name Configuration options
+ * @{
+ */
+/*
+ * RTC driver system settings.
+ */
+
+/**
+ * @brief RTC PCLK divider.
+ */
+#if !defined(LPC122x_RTC_CLKDIV) || defined(__DOXYGEN__)
+#define LPC122x_RTC_CLKDIV 0
+#endif
+
+/**
+ * @brief RTC CLK Source
+ */
+#if !defined(LPC122x_RTCCLK) || defined(__DOXYGEN__)
+#define LPC122x_RTCCLK SYSCFG_RTCCLK_1Hz
+#endif
+
+/**
+ * @brief RTC Alarm enable.
+ */
+#if !defined(LPC122x_RTC_USE_ALARM) || defined(__DOXYGEN__)
+#define LPC122x_RTC_USE_ALARM FALSE
+#endif
+
+/**
+ * @brief RTC IRQ Priority.
+ */
+#if !defined(LPC122x_RTC_IRQ_PRIORITY) || defined(__DOXYGEN__)
+#define LPC122x_RTC_IRQ_PRIORITY 3
+#endif
+/** @} */
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+#if !(LPC122x_RTCCLK == SYSCFG_RTCCLK_1Hz) && \
+ !(LPC122x_RTCCLK == SYSCFG_RTCCLK_DEL_1Hz) && \
+ !(LPC122x_RTCCLK == SYSCFG_RTCCLK_1kHz) && \
+ !(LPC122x_RTCCLK == SYSCFG_RTCCLK_PCLK)
+#error "Invalid source selected for RTC clock"
+#endif
+
+#if LPC122x_RTCCLK == SYSCFG_RTCCLK_1kHz
+#error "1 kHz RTC clock not supported"
+#endif
+
+#if LPC122x_RTCCLK == SYSCFG_RTCCLK_PCLK
+#if (LPC122x_MAINCLK/LPC122x_RTC_CLKDIV) != 1
+#error "RTC clock is not 1 Hz"
+#endif
+#endif
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief Type of a structure representing an RTC alarm time stamp.
+ */
+typedef struct RTCAlarm RTCAlarm;
+
+/**
+ * @brief Type of a structure representing an RTC wakeup period.
+ */
+typedef struct RTCWakeup RTCWakeup;
+
+/**
+ * @brief Type of a structure representing an RTC callbacks config.
+ */
+typedef struct RTCCallbackConfig RTCCallbackConfig;
+
+/**
+ * @brief Type of an RTC alarm.
+ * @details Meaningful on platforms with more than 1 alarm comparator.
+ */
+typedef uint32_t rtcalarm_t;
+
+/**
+ * @brief Type of an RTC event.
+ */
+typedef enum {
+ RTC_EVENT_ALARM = 0 /** Triggered on alarm. */
+} rtcevent_t;
+
+/**
+ * @brief Type of a generic RTC callback.
+ */
+typedef void (*rtccb_t)(RTCDriver *rtcp, rtcevent_t event);
+
+/**
+ * @brief Structure representing an RTC callbacks config.
+ */
+struct RTCCallbackConfig{
+ /**
+ * @brief Generic RTC callback pointer.
+ */
+ rtccb_t callback;
+};
+
+/**
+ * @brief Structure representing an RTC time stamp.
+ */
+struct RTCTime {
+ /**
+ * @brief Seconds since UNIX epoch.
+ */
+ uint32_t tv_sec;
+};
+
+/**
+ * @brief Structure representing an RTC alarm time stamp.
+ */
+struct RTCAlarm {
+ /**
+ * @brief Seconds since UNIX epoch.
+ */
+ uint32_t tv_sec;
+};
+
+/**
+ * @brief Structure representing an RTC driver.
+ */
+struct RTCDriver{
+ /**
+ * @brief Callback pointer.
+ */
+ rtccb_t callback;
+};
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#if !defined(__DOXYGEN__)
+extern RTCDriver RTCD1;
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void rtc_lld_init(void);
+ void rtc_lld_set_time(RTCDriver *rtcp, const RTCTime *timespec);
+ void rtc_lld_get_time(RTCDriver *rtcp, RTCTime *timespec);
+ void rtc_lld_set_alarm(RTCDriver *rtcp,
+ rtcalarm_t alarm,
+ const RTCAlarm *alarmspec);
+ void rtc_lld_get_alarm(RTCDriver *rtcp,
+ rtcalarm_t alarm,
+ RTCAlarm *alarmspec);
+ void rtc_lld_set_callback(RTCDriver *rtcp, rtccb_t callback);
+ uint32_t rtc_lld_get_time_fat(RTCDriver *rtcp);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_RTC */
+
+#endif /* _RTC_LLD_H_ */
+
+/** @} */
|