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Diffstat (limited to 'os/hal/include/hal_adc.h')
| -rw-r--r-- | os/hal/include/hal_adc.h | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/os/hal/include/hal_adc.h b/os/hal/include/hal_adc.h new file mode 100644 index 000000000..142ddfda7 --- /dev/null +++ b/os/hal/include/hal_adc.h @@ -0,0 +1,278 @@ +/*
+ 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 adc.h
+ * @brief ADC Driver macros and structures.
+ *
+ * @addtogroup ADC
+ * @{
+ */
+
+#ifndef _ADC_H_
+#define _ADC_H_
+
+#if (HAL_USE_ADC == TRUE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver constants. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver pre-compile time settings. */
+/*===========================================================================*/
+
+/**
+ * @name ADC configuration options
+ * @{
+ */
+/**
+ * @brief Enables synchronous APIs.
+ * @note Disabling this option saves both code and data space.
+ */
+#if !defined(ADC_USE_WAIT) || defined(__DOXYGEN__)
+#define ADC_USE_WAIT TRUE
+#endif
+
+/**
+ * @brief Enables the @p adcAcquireBus() and @p adcReleaseBus() APIs.
+ * @note Disabling this option saves both code and data space.
+ */
+#if !defined(ADC_USE_MUTUAL_EXCLUSION) || defined(__DOXYGEN__)
+#define ADC_USE_MUTUAL_EXCLUSION TRUE
+#endif
+/** @} */
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief Driver state machine possible states.
+ */
+typedef enum {
+ ADC_UNINIT = 0, /**< Not initialized. */
+ ADC_STOP = 1, /**< Stopped. */
+ ADC_READY = 2, /**< Ready. */
+ ADC_ACTIVE = 3, /**< Converting. */
+ ADC_COMPLETE = 4, /**< Conversion complete. */
+ ADC_ERROR = 5 /**< Conversion complete. */
+} adcstate_t;
+
+#include "adc_lld.h"
+
+/*===========================================================================*/
+/* Driver macros. */
+/*===========================================================================*/
+
+/**
+ * @name Low level driver helper macros
+ * @{
+ */
+#if (ADC_USE_WAIT == TRUE) || defined(__DOXYGEN__)
+/**
+ * @brief Resumes a thread waiting for a conversion completion.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ *
+ * @notapi
+ */
+#define _adc_reset_i(adcp) \
+ osalThreadResumeI(&(adcp)->thread, MSG_RESET)
+
+/**
+ * @brief Resumes a thread waiting for a conversion completion.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ *
+ * @notapi
+ */
+#define _adc_reset_s(adcp) \
+ osalThreadResumeS(&(adcp)->thread, MSG_RESET)
+
+/**
+ * @brief Wakes up the waiting thread.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ *
+ * @notapi
+ */
+#define _adc_wakeup_isr(adcp) { \
+ osalSysLockFromISR(); \
+ osalThreadResumeI(&(adcp)->thread, MSG_OK); \
+ osalSysUnlockFromISR(); \
+}
+
+/**
+ * @brief Wakes up the waiting thread with a timeout message.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ *
+ * @notapi
+ */
+#define _adc_timeout_isr(adcp) { \
+ osalSysLockFromISR(); \
+ osalThreadResumeI(&(adcp)->thread, MSG_TIMEOUT); \
+ osalSysUnlockFromISR(); \
+}
+
+#else /* !ADC_USE_WAIT */
+#define _adc_reset_i(adcp)
+#define _adc_reset_s(adcp)
+#define _adc_wakeup_isr(adcp)
+#define _adc_timeout_isr(adcp)
+#endif /* !ADC_USE_WAIT */
+
+/**
+ * @brief Common ISR code, half buffer event.
+ * @details This code handles the portable part of the ISR code:
+ * - Callback invocation.
+ * .
+ * @note This macro is meant to be used in the low level drivers
+ * implementation only.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ *
+ * @notapi
+ */
+#define _adc_isr_half_code(adcp) { \
+ if ((adcp)->grpp->end_cb != NULL) { \
+ (adcp)->grpp->end_cb(adcp, (adcp)->samples, (adcp)->depth / 2); \
+ } \
+}
+
+/**
+ * @brief Common ISR code, full buffer event.
+ * @details This code handles the portable part of the ISR code:
+ * - Callback invocation.
+ * - Waiting thread wakeup, if any.
+ * - Driver state transitions.
+ * .
+ * @note This macro is meant to be used in the low level drivers
+ * implementation only.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ *
+ * @notapi
+ */
+#define _adc_isr_full_code(adcp) { \
+ if ((adcp)->grpp->circular) { \
+ /* Callback handling.*/ \
+ if ((adcp)->grpp->end_cb != NULL) { \
+ if ((adcp)->depth > 1) { \
+ /* Invokes the callback passing the 2nd half of the buffer.*/ \
+ size_t half = (adcp)->depth / 2; \
+ size_t half_index = half * (adcp)->grpp->num_channels; \
+ (adcp)->grpp->end_cb(adcp, (adcp)->samples + half_index, half); \
+ } \
+ else { \
+ /* Invokes the callback passing the whole buffer.*/ \
+ (adcp)->grpp->end_cb(adcp, (adcp)->samples, (adcp)->depth); \
+ } \
+ } \
+ } \
+ else { \
+ /* End conversion.*/ \
+ adc_lld_stop_conversion(adcp); \
+ if ((adcp)->grpp->end_cb != NULL) { \
+ (adcp)->state = ADC_COMPLETE; \
+ /* Invoke the callback passing the whole buffer.*/ \
+ (adcp)->grpp->end_cb(adcp, (adcp)->samples, (adcp)->depth); \
+ if ((adcp)->state == ADC_COMPLETE) { \
+ (adcp)->state = ADC_READY; \
+ (adcp)->grpp = NULL; \
+ } \
+ } \
+ else { \
+ (adcp)->state = ADC_READY; \
+ (adcp)->grpp = NULL; \
+ } \
+ _adc_wakeup_isr(adcp); \
+ } \
+}
+
+/**
+ * @brief Common ISR code, error event.
+ * @details This code handles the portable part of the ISR code:
+ * - Callback invocation.
+ * - Waiting thread timeout signaling, if any.
+ * - Driver state transitions.
+ * .
+ * @note This macro is meant to be used in the low level drivers
+ * implementation only.
+ *
+ * @param[in] adcp pointer to the @p ADCDriver object
+ * @param[in] err platform dependent error code
+ *
+ * @notapi
+ */
+#define _adc_isr_error_code(adcp, err) { \
+ adc_lld_stop_conversion(adcp); \
+ if ((adcp)->grpp->error_cb != NULL) { \
+ (adcp)->state = ADC_ERROR; \
+ (adcp)->grpp->error_cb(adcp, err); \
+ if ((adcp)->state == ADC_ERROR) \
+ (adcp)->state = ADC_READY; \
+ } \
+ (adcp)->grpp = NULL; \
+ _adc_timeout_isr(adcp); \
+}
+/** @} */
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void adcInit(void);
+ void adcObjectInit(ADCDriver *adcp);
+ void adcStart(ADCDriver *adcp, const ADCConfig *config);
+ void adcStop(ADCDriver *adcp);
+ void adcStartConversion(ADCDriver *adcp,
+ const ADCConversionGroup *grpp,
+ adcsample_t *samples,
+ size_t depth);
+ void adcStartConversionI(ADCDriver *adcp,
+ const ADCConversionGroup *grpp,
+ adcsample_t *samples,
+ size_t depth);
+ void adcStopConversion(ADCDriver *adcp);
+ void adcStopConversionI(ADCDriver *adcp);
+#if ADC_USE_WAIT == TRUE
+ msg_t adcConvert(ADCDriver *adcp,
+ const ADCConversionGroup *grpp,
+ adcsample_t *samples,
+ size_t depth);
+#endif
+#if ADC_USE_MUTUAL_EXCLUSION == TRUE
+ void adcAcquireBus(ADCDriver *adcp);
+ void adcReleaseBus(ADCDriver *adcp);
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* HAL_USE_ADC == TRUE */
+
+#endif /* _ADC_H_ */
+
+/** @} */
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