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-rw-r--r--os/hal/platforms/LPC17xx/dac_lld.c210
-rw-r--r--os/hal/platforms/LPC17xx/dac_lld.h207
-rw-r--r--os/hal/platforms/LPC17xx/lpc17xx_dma.h9
-rw-r--r--os/hal/platforms/LPC17xx/platform.mk3
-rw-r--r--os/hal/src/hal.c3
5 files changed, 430 insertions, 2 deletions
diff --git a/os/hal/platforms/LPC17xx/dac_lld.c b/os/hal/platforms/LPC17xx/dac_lld.c
new file mode 100644
index 000000000..11a423d69
--- /dev/null
+++ b/os/hal/platforms/LPC17xx/dac_lld.c
@@ -0,0 +1,210 @@
+/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+ LPC17xx DAC 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 LPC17xx/dac_lld.c
+ * @brief LPC17xx DAC subsystem low level driver source.
+ *
+ * @addtogroup DAC
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+#if HAL_USE_DAC || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/** @brief CHN1 driver identifier.*/
+DACDriver DACD1;
+
+/*===========================================================================*/
+/* Driver local variables. */
+/*===========================================================================*/
+
+static lpc17xx_dma_lli_config_t lpc_dac_lli[2] __attribute__((aligned(0x10)));
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+
+/**
+ * @brief DAC DMA interrupt function.
+ *
+ * @param[in] dacp pointer to the @p DACDriver object
+ * @param[in] flags dma error flags
+ */
+static void dac_serve_dma_interrupt(DACDriver *dacp, uint32_t flags) {
+
+ if ((flags & (1 << LPC17xx_DAC_DMA_CHANNEL)) != 0) {
+ _dac_isr_error_code(dacp, flags); /* DMA errors handling.*/
+ }
+ else {
+ if (dacp->half_buffer == false) {
+ _dac_isr_half_code(dacp);
+ dacp->half_buffer = true;
+ }
+ else {
+ _dac_isr_full_code(dacp);
+ dacp->half_buffer = false;
+ }
+ }
+}
+
+/*===========================================================================*/
+/* Driver interrupt handlers. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief Low level DAC driver initialization.
+ *
+ * @notapi
+ */
+void dac_lld_init(void) {
+ dacObjectInit(&DACD1);
+}
+
+/**
+ * @brief Configures and activates the DAC peripheral.
+ *
+ * @param[in] dacp pointer to the @p DACDriver object
+ *
+ * @notapi
+ */
+void dac_lld_start(DACDriver *dacp) {
+
+ if (dacp->state == DAC_STOP) {
+
+ /* Enable DAC */
+ LPC_PINCON->PINSEL1 |= (2UL << 20); /* Set AOUT P0.26 pin.*/
+
+ LPC_DAC->CR = 0;
+ LPC_DAC->CTRL = 0;
+ LPC_DAC->CNTVAL = LPC17xx_PCLK/dacp->config->frequency;
+
+ dmaChannelAllocate(LPC17xx_DAC_DMA_CHANNEL, \
+ (lpc17xx_dmaisr_t)dac_serve_dma_interrupt, \
+ (void *)dacp);
+ }
+}
+
+/**
+ * @brief Deactivates the DAC peripheral.
+ *
+ * @param[in] dacp pointer to the @p DACDriver object
+ *
+ * @notapi
+ */
+void dac_lld_stop(DACDriver *dacp) {
+
+ /* If in ready state then disables the DAC clock.*/
+ if (dacp->state == DAC_READY) {
+
+ /* DMA disable.*/
+ dmaChannelDisable(LPC17xx_DAC_DMA_CHANNEL);
+ dmaChannelRelease(LPC17xx_DAC_DMA_CHANNEL);
+
+ /* Disable DAC */
+ LPC_PINCON->PINSEL1 &= ~(2UL << 20); /* Disable AOUT P0.26 pin.*/
+ }
+}
+
+/**
+ * @brief Sends data over the DAC bus.
+ * @details This asynchronous function starts a transmit operation.
+ * @post At the end of the operation the configured callback is invoked.
+ *
+ * @param[in] dacp pointer to the @p DACDriver object
+ * @param[in] n number of words to send
+ * @param[in] txbuf the pointer to the transmit buffer
+ *
+ * @notapi
+ */
+void dac_lld_start_conversion(DACDriver *dacp) {
+
+ dacp->half_buffer = false;
+ uint32_t dma_ch_config;
+
+ /* DMA configuration */
+ lpc_dac_lli[0].srcaddr = (uint32_t) &dacp->samples[0];
+ lpc_dac_lli[0].dstaddr = (uint32_t)&LPC_DAC->CR;
+ lpc_dac_lli[0].lli = (uint32_t) &lpc_dac_lli[1];
+ lpc_dac_lli[0].control =
+ DMA_CTRL_TRANSFER_SIZE(dacp->depth/2) |
+ DMA_CTRL_SRC_BSIZE_1 |
+ DMA_CTRL_DST_BSIZE_1 |
+ DMA_CTRL_SRC_WIDTH_WORD |
+ DMA_CTRL_DST_WIDTH_WORD |
+ DMA_CTRL_SRC_INC |
+ DMA_CTRL_DST_NOINC |
+ DMA_CTRL_PROT1_USER |
+ DMA_CTRL_PROT2_NONBUFF |
+ DMA_CTRL_PROT3_NONCACHE |
+ DMA_CTRL_INT;
+
+ lpc_dac_lli[1].srcaddr = (uint32_t) &dacp->samples[dacp->depth/2];
+ lpc_dac_lli[1].dstaddr = lpc_dac_lli[0].dstaddr;
+ lpc_dac_lli[1].control = lpc_dac_lli[0].control;
+
+ if (dacp->grpp->circular == true) {
+ lpc_dac_lli[1].lli = (uint32_t) &lpc_dac_lli[0];
+ }
+ else {
+ lpc_dac_lli[1].lli = 0;
+ }
+
+ dma_ch_config =
+ DMA_CFG_CH_ENABLE |
+ DMA_CFG_DST_PERIPH(DMA_DAC) |
+ DMA_CFG_TTYPE_M2P |
+ DMA_CFG_IE |
+ DMA_CFG_ITC;
+
+ dmaChannelSrcAddr(LPC17xx_DAC_DMA_CHANNEL, lpc_dac_lli[0].srcaddr);
+ dmaChannelDstAddr(LPC17xx_DAC_DMA_CHANNEL, lpc_dac_lli[0].dstaddr);
+ dmaChannelLinkedList(LPC17xx_DAC_DMA_CHANNEL, lpc_dac_lli[0].lli);
+ dmaChannelControl(LPC17xx_DAC_DMA_CHANNEL, lpc_dac_lli[0].control);
+ dmaChannelConfig(LPC17xx_DAC_DMA_CHANNEL, dma_ch_config);
+
+ LPC_DAC->CTRL = DACCTRL_DMA_ENA | DACCTRL_CNT_ENA | DACCTRL_DBLBUF_ENA;
+}
+
+void dac_lld_stop_conversion(DACDriver *dacp) {
+
+ /* If in active state then disables the DAC.*/
+ if (dacp->state == DAC_ACTIVE) {
+
+ /* DMA disable.*/
+ dmaChannelDisable(LPC17xx_DAC_DMA_CHANNEL);
+ }
+};
+
+#endif /* HAL_USE_DAC */
+
+/** @} */
diff --git a/os/hal/platforms/LPC17xx/dac_lld.h b/os/hal/platforms/LPC17xx/dac_lld.h
new file mode 100644
index 000000000..26c23da11
--- /dev/null
+++ b/os/hal/platforms/LPC17xx/dac_lld.h
@@ -0,0 +1,207 @@
+/*
+ ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
+ LPC17xx DAC 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 LPC17xx/dac_lld.h
+ * @brief LPC17xx DAC subsystem low level driver header.
+ *
+ * @addtogroup DAC
+ * @{
+ */
+
+#ifndef _DAC_LLD_H_
+#define _DAC_LLD_H_
+
+#if HAL_USE_DAC || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+#define DACR_BIAS (1UL << 16)
+
+#define DACCTRL_INT_DMA_REQ (1UL << 0)
+#define DACCTRL_DBLBUF_ENA (1UL << 1)
+#define DACCTRL_CNT_ENA (1UL << 2)
+#define DACCTRL_DMA_ENA (1UL << 3)
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @name Configuration options
+ * @{
+ */
+
+/**
+ * @brief DMA stream used for DAC CHN1 TX operations.
+ * @note This option is only available on platforms with enhanced DMA.
+ */
+#if !defined(LPC17xx_DAC_DMA_CHANNEL) || defined(__DOXYGEN__)
+#define LPC17xx_DAC_DMA_CHANNEL DMA_CHANNEL5
+#endif
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+#if !defined(LPC17xx_DMA_REQUIRED)
+#define LPC17xx_DMA_REQUIRED
+#endif
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief Type of a structure representing an DAC driver.
+ */
+typedef struct DACDriver DACDriver;
+
+/**
+ * @brief Type representing a DAC sample.
+ */
+typedef uint32_t dacsample_t;
+
+/**
+ * @brief DAC notification callback type.
+ *
+ * @param[in] dacp pointer to the @p DACDriver object triggering the
+ * callback
+ */
+typedef void (*dacendcallback_t)(DACDriver *dacp, const dacsample_t * samples, size_t pos);
+
+/**
+ * @brief DAC notification callback type.
+ *
+ * @param[in] dacp pointer to the @p DACDriver object triggering the
+ * callback
+ */
+typedef void (*dacerrcallback_t)(DACDriver *dacp, uint32_t flags);
+
+/**
+ * @brief DAC Conversion group structure.
+ */
+typedef struct {
+ /**
+ * @brief Number of DAC channels.
+ */
+ uint16_t num_channels;
+ /**
+ * @brief Operation complete callback or @p NULL.
+ */
+ dacendcallback_t end_cb;
+ /**
+ * @brief Error handling callback or @p NULL.
+ */
+ dacerrcallback_t error_cb;
+ /**
+ * @brief Error handling callback or @p NULL.
+ */
+ bool circular;
+
+} DACConversionGroup;
+
+/**
+ * @brief Driver configuration structure.
+ */
+typedef struct {
+ /**
+ * @brief Timer frequency in Hz.
+ */
+ uint32_t frequency;
+ /* End of the mandatory fields.*/
+} DACConfig;
+
+/**
+ * @brief Structure representing a DAC driver.
+ */
+struct DACDriver {
+ /**
+ * @brief Driver state.
+ */
+ dacstate_t state;
+ /**
+ * @brief Conversion group.
+ */
+ const DACConversionGroup *grpp;
+ /**
+ * @brief Samples buffer pointer.
+ */
+ const dacsample_t *samples;
+ /**
+ * @brief Samples buffer size.
+ */
+ uint16_t depth;
+ /**
+ * @brief Current configuration data.
+ */
+ const DACConfig *config;
+#if DAC_USE_WAIT || defined(__DOXYGEN__)
+ /**
+ * @brief Waiting thread.
+ */
+ Thread *thread;
+#endif /* DAC_USE_WAIT */
+#if DAC_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 /* DAC_USE_MUTUAL_EXCLUSION */
+#if defined(DAC_DRIVER_EXT_FIELDS)
+ DAC_DRIVER_EXT_FIELDS
+#endif
+ /* End of the mandatory fields.*/
+ /**
+ * @brief Half buffer indicator.
+ */
+ bool_t half_buffer;
+};
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+extern DACDriver DACD1;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void dac_lld_init(void);
+ void dac_lld_start(DACDriver *dacp);
+ void dac_lld_stop(DACDriver *dacp);
+ void dac_lld_start_conversion(DACDriver *dacp);
+ void dac_lld_stop_conversion(DACDriver *dacp);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_DAC */
+
+#endif /* _DAC_LLD_H_ */
+
+/** @} */
diff --git a/os/hal/platforms/LPC17xx/lpc17xx_dma.h b/os/hal/platforms/LPC17xx/lpc17xx_dma.h
index e581265a5..952c24a17 100644
--- a/os/hal/platforms/LPC17xx/lpc17xx_dma.h
+++ b/os/hal/platforms/LPC17xx/lpc17xx_dma.h
@@ -217,6 +217,13 @@ typedef struct {
volatile uint32_t config; /**< @brief Configuration. */
} lpc17xx_dma_channel_config_t;
+typedef struct {
+ volatile uint32_t srcaddr; /**< @brief Source address. */
+ volatile uint32_t dstaddr; /**< @brief Destination address. */
+ volatile uint32_t lli; /**< @brief Linked List Item. */
+ volatile uint32_t control; /**< @brief Control. */
+} lpc17xx_dma_lli_config_t;
+
/**
* @brief DMA channel number.
*/
@@ -312,7 +319,7 @@ typedef void (*lpc17xx_dmaisr_t)(void *p, uint32_t flags);
* @special
*/
#define dmaChannelLinkedList(dmach, addr) \
- _lpc17xx_dma_channel_config_t[dmach]->CLLI = (((uint32_t)(addr)) << 2)
+ _lpc17xx_dma_channel_config_t[dmach]->CLLI = ((uint32_t)(addr))
/**
* @brief Set control configuration to a DMA channel.
diff --git a/os/hal/platforms/LPC17xx/platform.mk b/os/hal/platforms/LPC17xx/platform.mk
index b3e3f8eed..1cc18db5b 100644
--- a/os/hal/platforms/LPC17xx/platform.mk
+++ b/os/hal/platforms/LPC17xx/platform.mk
@@ -7,7 +7,8 @@ PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/LPC17xx/hal_lld.c \
${CHIBIOS}/os/hal/platforms/LPC17xx/serial_lld.c \
${CHIBIOS}/os/hal/platforms/LPC17xx/rtc_lld.c \
${CHIBIOS}/os/hal/platforms/LPC17xx/i2c_lld.c \
- ${CHIBIOS}/os/hal/platforms/LPC17xx/spi_lld.c
+ ${CHIBIOS}/os/hal/platforms/LPC17xx/spi_lld.c \
+ ${CHIBIOS}/os/hal/platforms/LPC17xx/dac_lld.c
# Required include directories
diff --git a/os/hal/src/hal.c b/os/hal/src/hal.c
index 974a8854b..d7a088ec9 100644
--- a/os/hal/src/hal.c
+++ b/os/hal/src/hal.c
@@ -74,6 +74,9 @@ void halInit(void) {
#if HAL_USE_CAN || defined(__DOXYGEN__)
canInit();
#endif
+#if HAL_USE_DAC || defined(__DOXYGEN__)
+ dacInit();
+#endif
#if HAL_USE_EXT || defined(__DOXYGEN__)
extInit();
#endif
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-23 12:06:41 +0000