git-svn-id: svn://svn.code.sf.net/p/chibios/svn/branches/kernel_3_dev@6073 35acf78f-673a-0410-8e92-d51de3d6d3f4

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diff --git a/os/halnew/src/adc.c b/os/halnew/src/adc.c
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+/*

+    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,

+                 2011,2012,2013 Giovanni Di Sirio.

+

+    This file is part of ChibiOS/RT.

+

+    ChibiOS/RT is free software; you can redistribute it and/or modify

+    it under the terms of the GNU General Public License as published by

+    the Free Software Foundation; either version 3 of the License, or

+    (at your option) any later version.

+

+    ChibiOS/RT is distributed in the hope that it will be useful,

+    but WITHOUT ANY WARRANTY; without even the implied warranty of

+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

+    GNU General Public License for more details.

+

+    You should have received a copy of the GNU General Public License

+    along with this program.  If not, see <http://www.gnu.org/licenses/>.

+*/

+

+/**

+ * @file    adc.c

+ * @brief   ADC Driver code.

+ *

+ * @addtogroup ADC

+ * @{

+ */

+

+#include "hal.h"

+

+#if HAL_USE_ADC || 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

+  adcp->thread   = NULL;

+#endif /* ADC_USE_WAIT */

+#if ADC_USE_MUTUAL_EXCLUSION

+  osalMutexObjectInit(&adcp->mutex);

+#endif /* ADC_USE_MUTUAL_EXCLUSION */

+#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),

+                "adcStart(), #1", "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),

+                "adcStop(), #1", "invalid state");

+  adc_lld_stop(adcp);

+  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 == 1) || ((depth & 1) == 0)));

+  osalDbgAssert((adcp->state == ADC_READY) ||

+                (adcp->state == ADC_COMPLETE) ||

+                (adcp->state == ADC_ERROR),

+                "adcStartConversionI(), #1", "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),

+                "adcStopConversion(), #1", "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),

+                "adcStopConversionI(), #1", "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 || 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 RDY_OK       Conversion finished.

+ * @retval RDY_RESET    The conversion has been stopped using

+ *                      @p acdStopConversion() or @p acdStopConversionI(),

+ *                      the result buffer may contain incorrect data.

+ * @retval RDY_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, "adcConvert(), #1", "already waiting");

+  adcStartConversionI(adcp, grpp, samples, depth);

+  msg = osalThreadSuspendS(&adcp->thread);

+  osalSysUnlock();

+  return msg;

+}

+#endif /* ADC_USE_WAIT */

+

+#if ADC_USE_MUTUAL_EXCLUSION || 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 */

+

+#endif /* HAL_USE_ADC */

+

+/** @} */