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| author | Giovanni Di Sirio <gdisirio@gmail.com> | 2016-04-02 08:31:39 +0000 |
|---|---|---|
| committer | Giovanni Di Sirio <gdisirio@gmail.com> | 2016-04-02 08:31:39 +0000 |
| commit | a84c32523cb971505e03ae73409839637d8706a9 (patch) | |
| tree | 0fbdac64cba70108c3a6106e137cef741e1901ba /os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c | |
| parent | f905d498c81714e5c846529a441ef6977908d39f (diff) | |
| download | ChibiOS-a84c32523cb971505e03ae73409839637d8706a9.tar.gz ChibiOS-a84c32523cb971505e03ae73409839637d8706a9.tar.bz2 ChibiOS-a84c32523cb971505e03ae73409839637d8706a9.zip | |
STM32 LLD renaming done.
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9208 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c')
| -rw-r--r-- | os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c b/os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c new file mode 100644 index 000000000..e68b4de3f --- /dev/null +++ b/os/hal/ports/STM32/LLD/EXTIv1/hal_ext_lld.c @@ -0,0 +1,239 @@ +/*
+ ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
+
+ 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 STM32/EXTIv1/ext_lld.c
+ * @brief STM32 EXT subsystem low level driver source.
+ *
+ * @addtogroup EXT
+ * @{
+ */
+
+#include "hal.h"
+
+#if HAL_USE_EXT || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/* Handling a difference in ST headers.*/
+#if defined(STM32L4XX)
+#define EMR EMR1
+#define IMR IMR1
+#define PR PR1
+#define RTSR RTSR1
+#define FTSR FTSR1
+#endif
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/**
+ * @brief EXTD1 driver identifier.
+ */
+EXTDriver EXTD1;
+
+/*===========================================================================*/
+/* 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.*/
+ extObjectInit(&EXTD1);
+}
+
+/**
+ * @brief Configures and activates the EXT peripheral.
+ *
+ * @param[in] extp pointer to the @p EXTDriver object
+ *
+ * @notapi
+ */
+void ext_lld_start(EXTDriver *extp) {
+ expchannel_t line;
+
+ if (extp->state == EXT_STOP)
+ ext_lld_exti_irq_enable();
+
+ /* Configuration of automatic channels.*/
+ for (line = 0; line < EXT_MAX_CHANNELS; line++)
+ if (extp->config->channels[line].mode & EXT_CH_MODE_AUTOSTART)
+ ext_lld_channel_enable(extp, line);
+ else
+ ext_lld_channel_disable(extp, line);
+}
+
+/**
+ * @brief Deactivates the EXT peripheral.
+ *
+ * @param[in] extp pointer to the @p EXTDriver object
+ *
+ * @notapi
+ */
+void ext_lld_stop(EXTDriver *extp) {
+
+ if (extp->state == EXT_ACTIVE)
+ ext_lld_exti_irq_disable();
+
+ EXTI->EMR = 0;
+ EXTI->IMR = STM32_EXTI_IMR_MASK;
+ EXTI->PR = ~STM32_EXTI_IMR_MASK;
+#if STM32_EXTI_NUM_LINES > 32
+ EXTI->IMR2 = STM32_EXTI_IMR2_MASK;
+ EXTI->PR2 = ~STM32_EXTI_IMR2_MASK;
+#endif
+}
+
+/**
+ * @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) {
+ uint32_t cmask = (1 << (channel & 0x1F));
+
+ /* Setting the associated GPIO for external channels.*/
+ if (channel < 16) {
+ uint32_t n = channel >> 2;
+ uint32_t mask = ~(0xF << ((channel & 3) * 4));
+ uint32_t port = ((extp->config->channels[channel].mode &
+ EXT_MODE_GPIO_MASK) >>
+ EXT_MODE_GPIO_OFF) << ((channel & 3) * 4);
+
+#if defined(STM32F1XX)
+ AFIO->EXTICR[n] = (AFIO->EXTICR[n] & mask) | port;
+#else /* !defined(STM32F1XX) */
+ SYSCFG->EXTICR[n] = (SYSCFG->EXTICR[n] & mask) | port;
+#endif /* !defined(STM32F1XX) */
+ }
+
+#if STM32_EXTI_NUM_LINES > 32
+ if (channel < 32) {
+#endif
+ /* Masked out lines must not be touched by this driver.*/
+ if ((cmask & STM32_EXTI_IMR_MASK) != 0U) {
+ return;
+ }
+
+ /* Programming edge registers.*/
+ if (extp->config->channels[channel].mode & EXT_CH_MODE_RISING_EDGE)
+ EXTI->RTSR |= cmask;
+ else
+ EXTI->RTSR &= ~cmask;
+ if (extp->config->channels[channel].mode & EXT_CH_MODE_FALLING_EDGE)
+ EXTI->FTSR |= cmask;
+ else
+ EXTI->FTSR &= ~cmask;
+
+ /* Programming interrupt and event registers.*/
+ if (extp->config->channels[channel].cb != NULL) {
+ EXTI->IMR |= cmask;
+ EXTI->EMR &= ~cmask;
+ }
+ else {
+ EXTI->EMR |= cmask;
+ EXTI->IMR &= ~cmask;
+ }
+#if STM32_EXTI_NUM_LINES > 32
+ }
+ else {
+ /* Masked out lines must not be touched by this driver.*/
+ if ((cmask & STM32_EXTI_IMR2_MASK) != 0U) {
+ return;
+ }
+
+ /* Programming edge registers.*/
+ if (extp->config->channels[channel].mode & EXT_CH_MODE_RISING_EDGE)
+ EXTI->RTSR2 |= cmask;
+ else
+ EXTI->RTSR2 &= ~cmask;
+ if (extp->config->channels[channel].mode & EXT_CH_MODE_FALLING_EDGE)
+ EXTI->FTSR2 |= cmask;
+ else
+ EXTI->FTSR2 &= ~cmask;
+
+ /* Programming interrupt and event registers.*/
+ if (extp->config->channels[channel].cb != NULL) {
+ EXTI->IMR2 |= cmask;
+ EXTI->EMR2 &= ~cmask;
+ }
+ else {
+ EXTI->EMR2 |= cmask;
+ EXTI->IMR2 &= ~cmask;
+ }
+ }
+#endif
+}
+
+/**
+ * @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) {
+ uint32_t cmask = (1 << (channel & 0x1F));
+
+ (void)extp;
+
+#if STM32_EXTI_NUM_LINES > 32
+ if (channel < 32) {
+#endif
+ EXTI->IMR &= ~cmask;
+ EXTI->EMR &= ~cmask;
+ EXTI->RTSR &= ~cmask;
+ EXTI->FTSR &= ~cmask;
+ EXTI->PR = cmask;
+#if STM32_EXTI_NUM_LINES > 32
+ }
+ else {
+ EXTI->IMR2 &= ~cmask;
+ EXTI->EMR2 &= ~cmask;
+ EXTI->RTSR2 &= ~cmask;
+ EXTI->FTSR2 &= ~cmask;
+ EXTI->PR2 = cmask;
+ }
+#endif
+}
+
+#endif /* HAL_USE_EXT */
+
+/** @} */
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