diff options
Diffstat (limited to 'ChibiOS_20.3.2/os/hal/src/hal_adc.c')
| -rw-r--r-- | ChibiOS_20.3.2/os/hal/src/hal_adc.c | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/ChibiOS_20.3.2/os/hal/src/hal_adc.c b/ChibiOS_20.3.2/os/hal/src/hal_adc.c new file mode 100644 index 0000000..41234ef --- /dev/null +++ b/ChibiOS_20.3.2/os/hal/src/hal_adc.c @@ -0,0 +1,324 @@ +/*
+ ChibiOS - Copyright (C) 2006..2018 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 hal_adc.c
+ * @brief ADC Driver code.
+ *
+ * @addtogroup ADC
+ * @{
+ */
+
+#include "hal.h"
+
+#if (HAL_USE_ADC == TRUE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions. */
+/*===========================================================================*/
+
+/**
+ * @brief ADC Driver initialization.
+ * @note This function is implicitly invoked by @p halInit(), there is
+ * no need to explicitly initialize the driver.
+ *
+ * @init
+ */
+void adcInit(void) {
+
+ adc_lld_init();
+}
+
+/**
+ * @brief Initializes the standard part of a @p ADCDriver structure.
+ *
+ * @param[out] adcp pointer to the @p ADCDriver object
+ *
+ * @init
+ */
+void adcObjectInit(ADCDriver *adcp) {
+
+ adcp->state = ADC_STOP;
+ adcp->config = NULL;
+ adcp->samples = NULL;
+ adcp->depth = 0;
+ adcp->grpp = NULL;
+#if ADC_USE_WAIT == TRUE
+ adcp->thread = NULL;
+#endif
+#if ADC_USE_MUTUAL_EXCLUSION == TRUE
+ osalMutexObjectInit(&adcp->mutex);
+#endif
+#if defined(ADC_DRIVER_EXT_INIT_HOOK)
+ ADC_DRIVER_EXT_INIT_HOOK(adcp);
+#endif
+}
+
+/**
+ * @brief Configures and activates the ADC peripheral.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ * @param[in] config pointer to the @p ADCConfig object. Depending on
+ * the implementation the value can be @p NULL.
+ *
+ * @api
+ */
+void adcStart(ADCDriver *adcp, const ADCConfig *config) {
+
+ osalDbgCheck(adcp != NULL);
+
+ osalSysLock();
+ osalDbgAssert((adcp->state == ADC_STOP) || (adcp->state == ADC_READY),
+ "invalid state");
+ adcp->config = config;
+ adc_lld_start(adcp);
+ adcp->state = ADC_READY;
+ osalSysUnlock();
+}
+
+/**
+ * @brief Deactivates the ADC peripheral.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ *
+ * @api
+ */
+void adcStop(ADCDriver *adcp) {
+
+ osalDbgCheck(adcp != NULL);
+
+ osalSysLock();
+
+ osalDbgAssert((adcp->state == ADC_STOP) || (adcp->state == ADC_READY),
+ "invalid state");
+
+ adc_lld_stop(adcp);
+ adcp->config = NULL;
+ adcp->state = ADC_STOP;
+
+ osalSysUnlock();
+}
+
+/**
+ * @brief Starts an ADC conversion.
+ * @details Starts an asynchronous conversion operation.
+ * @note The buffer is organized as a matrix of M*N elements where M is the
+ * channels number configured into the conversion group and N is the
+ * buffer depth. The samples are sequentially written into the buffer
+ * with no gaps.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ * @param[in] grpp pointer to a @p ADCConversionGroup object
+ * @param[out] samples pointer to the samples buffer
+ * @param[in] depth buffer depth (matrix rows number). The buffer depth
+ * must be one or an even number.
+ *
+ * @api
+ */
+void adcStartConversion(ADCDriver *adcp,
+ const ADCConversionGroup *grpp,
+ adcsample_t *samples,
+ size_t depth) {
+
+ osalSysLock();
+ adcStartConversionI(adcp, grpp, samples, depth);
+ osalSysUnlock();
+}
+
+/**
+ * @brief Starts an ADC conversion.
+ * @details Starts an asynchronous conversion operation.
+ * @post The callbacks associated to the conversion group will be invoked
+ * on buffer fill and error events.
+ * @note The buffer is organized as a matrix of M*N elements where M is the
+ * channels number configured into the conversion group and N is the
+ * buffer depth. The samples are sequentially written into the buffer
+ * with no gaps.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ * @param[in] grpp pointer to a @p ADCConversionGroup object
+ * @param[out] samples pointer to the samples buffer
+ * @param[in] depth buffer depth (matrix rows number). The buffer depth
+ * must be one or an even number.
+ *
+ * @iclass
+ */
+void adcStartConversionI(ADCDriver *adcp,
+ const ADCConversionGroup *grpp,
+ adcsample_t *samples,
+ size_t depth) {
+
+ osalDbgCheckClassI();
+ osalDbgCheck((adcp != NULL) && (grpp != NULL) && (samples != NULL) &&
+ (depth > 0U) && ((depth == 1U) || ((depth & 1U) == 0U)));
+ osalDbgAssert((adcp->state == ADC_READY) ||
+ (adcp->state == ADC_ERROR),
+ "not ready");
+
+ adcp->samples = samples;
+ adcp->depth = depth;
+ adcp->grpp = grpp;
+ adcp->state = ADC_ACTIVE;
+ adc_lld_start_conversion(adcp);
+}
+
+/**
+ * @brief Stops an ongoing conversion.
+ * @details This function stops the currently ongoing conversion and returns
+ * the driver in the @p ADC_READY state. If there was no conversion
+ * being processed then the function does nothing.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ *
+ * @api
+ */
+void adcStopConversion(ADCDriver *adcp) {
+
+ osalDbgCheck(adcp != NULL);
+
+ osalSysLock();
+ osalDbgAssert((adcp->state == ADC_READY) || (adcp->state == ADC_ACTIVE),
+ "invalid state");
+ if (adcp->state != ADC_READY) {
+ adc_lld_stop_conversion(adcp);
+ adcp->grpp = NULL;
+ adcp->state = ADC_READY;
+ _adc_reset_s(adcp);
+ }
+ osalSysUnlock();
+}
+
+/**
+ * @brief Stops an ongoing conversion.
+ * @details This function stops the currently ongoing conversion and returns
+ * the driver in the @p ADC_READY state. If there was no conversion
+ * being processed then the function does nothing.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ *
+ * @iclass
+ */
+void adcStopConversionI(ADCDriver *adcp) {
+
+ osalDbgCheckClassI();
+ osalDbgCheck(adcp != NULL);
+ osalDbgAssert((adcp->state == ADC_READY) ||
+ (adcp->state == ADC_ACTIVE) ||
+ (adcp->state == ADC_COMPLETE),
+ "invalid state");
+
+ if (adcp->state != ADC_READY) {
+ adc_lld_stop_conversion(adcp);
+ adcp->grpp = NULL;
+ adcp->state = ADC_READY;
+ _adc_reset_i(adcp);
+ }
+}
+
+#if (ADC_USE_WAIT == TRUE) || defined(__DOXYGEN__)
+/**
+ * @brief Performs an ADC conversion.
+ * @details Performs a synchronous conversion operation.
+ * @note The buffer is organized as a matrix of M*N elements where M is the
+ * channels number configured into the conversion group and N is the
+ * buffer depth. The samples are sequentially written into the buffer
+ * with no gaps.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ * @param[in] grpp pointer to a @p ADCConversionGroup object
+ * @param[out] samples pointer to the samples buffer
+ * @param[in] depth buffer depth (matrix rows number). The buffer depth
+ * must be one or an even number.
+ * @return The operation result.
+ * @retval MSG_OK Conversion finished.
+ * @retval MSG_RESET The conversion has been stopped using
+ * @p acdStopConversion() or @p acdStopConversionI(),
+ * the result buffer may contain incorrect data.
+ * @retval MSG_TIMEOUT The conversion has been stopped because an hardware
+ * error.
+ *
+ * @api
+ */
+msg_t adcConvert(ADCDriver *adcp,
+ const ADCConversionGroup *grpp,
+ adcsample_t *samples,
+ size_t depth) {
+ msg_t msg;
+
+ osalSysLock();
+ osalDbgAssert(adcp->thread == NULL, "already waiting");
+ adcStartConversionI(adcp, grpp, samples, depth);
+ msg = osalThreadSuspendS(&adcp->thread);
+ osalSysUnlock();
+ return msg;
+}
+#endif /* ADC_USE_WAIT == TRUE */
+
+#if (ADC_USE_MUTUAL_EXCLUSION == TRUE) || defined(__DOXYGEN__)
+/**
+ * @brief Gains exclusive access to the ADC peripheral.
+ * @details This function tries to gain ownership to the ADC bus, if the bus
+ * is already being used then the invoking thread is queued.
+ * @pre In order to use this function the option
+ * @p ADC_USE_MUTUAL_EXCLUSION must be enabled.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ *
+ * @api
+ */
+void adcAcquireBus(ADCDriver *adcp) {
+
+ osalDbgCheck(adcp != NULL);
+
+ osalMutexLock(&adcp->mutex);
+}
+
+/**
+ * @brief Releases exclusive access to the ADC peripheral.
+ * @pre In order to use this function the option
+ * @p ADC_USE_MUTUAL_EXCLUSION must be enabled.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ *
+ * @api
+ */
+void adcReleaseBus(ADCDriver *adcp) {
+
+ osalDbgCheck(adcp != NULL);
+
+ osalMutexUnlock(&adcp->mutex);
+}
+#endif /* ADC_USE_MUTUAL_EXCLUSION == TRUE */
+
+#endif /* HAL_USE_ADC == TRUE */
+
+/** @} */
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