git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@4234 35acf78f-673a-0410-8e92-d51de3d6d3f4

3 files changed, 586 insertions, 0 deletions

diff --git a/os/hal/platforms/STM32F0xx/adc_lld.c b/os/hal/platforms/STM32F0xx/adc_lld.c
new file mode 100644
index 000000000..751f15afd
--- /dev/null
+++ b/os/hal/platforms/STM32F0xx/adc_lld.c
@@ -0,0 +1,292 @@
+/*

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

+                 2011,2012 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    STM32F0xx/adc_lld.c

+ * @brief   STM32F0xx ADC subsystem low level driver source.

+ *

+ * @addtogroup ADC

+ * @{

+ */

+

+#include "ch.h"

+#include "hal.h"

+

+#if HAL_USE_ADC || defined(__DOXYGEN__)

+

+/*===========================================================================*/

+/* Driver exported variables.                                                */

+/*===========================================================================*/

+

+/** @brief ADC1 driver identifier.*/

+#if STM32_ADC_USE_ADC1 || defined(__DOXYGEN__)

+ADCDriver ADCD1;

+#endif

+

+/*===========================================================================*/

+/* Driver local variables.                                                   */

+/*===========================================================================*/

+

+/*===========================================================================*/

+/* Driver local functions.                                                   */

+/*===========================================================================*/

+

+/**

+ * @brief   Stops an ongoing conversion, if any.

+ *

+ * @param[in] adc       pointer to the ADC registers block

+ */

+static void adc_lld_stop_adc(ADC_TypeDef *adc) {

+

+  if (adc->CR & ADC_CR_ADSTART) {

+    adc->CR |= ADC_CR_ADSTP;

+    while (adc->CR & ADC_CR_ADSTP)

+      ;

+  }

+}

+

+/**

+ * @brief   ADC DMA ISR service routine.

+ *

+ * @param[in] adcp      pointer to the @p ADCDriver object

+ * @param[in] flags     pre-shifted content of the ISR register

+ */

+static void adc_lld_serve_rx_interrupt(ADCDriver *adcp, uint32_t flags) {

+

+  /* DMA errors handling.*/

+  if ((flags & (STM32_DMA_ISR_TEIF | STM32_DMA_ISR_DMEIF)) != 0) {

+    /* DMA, this could help only if the DMA tries to access an unmapped

+       address space or violates alignment rules.*/

+    _adc_isr_error_code(adcp, ADC_ERR_DMAFAILURE);

+  }

+  else {

+    /* It is possible that the conversion group has already be reset by the

+       ADC error handler, in this case this interrupt is spurious.*/

+    if (adcp->grpp != NULL) {

+      if ((flags & STM32_DMA_ISR_HTIF) != 0) {

+        /* Half transfer processing.*/

+        _adc_isr_half_code(adcp);

+      }

+      if ((flags & STM32_DMA_ISR_TCIF) != 0) {

+        /* Transfer complete processing.*/

+        _adc_isr_full_code(adcp);

+      }

+    }

+  }

+}

+

+/*===========================================================================*/

+/* Driver interrupt handlers.                                                */

+/*===========================================================================*/

+

+#if STM32_ADC_USE_ADC1 || defined(__DOXYGEN__)

+/**

+ * @brief   ADC interrupt handler.

+ *

+ * @isr

+ */

+CH_IRQ_HANDLER(ADC1_IRQHandler) {

+  uint32_t isr;

+

+  CH_IRQ_PROLOGUE();

+

+  isr = ADC1->ISR;

+  ADC1->ISR = isr;

+  /* Note, an overflow may occur after the conversion ended before the driver

+     is able to stop the ADC, this is why the DMA channel is checked too.*/

+  if ((isr & ADC_ISR_OVR) && (dmaStreamGetTransactionSize(ADCD1.dmastp) > 0)) {

+    /* ADC overflow condition, this could happen only if the DMA is unable

+       to read data fast enough.*/

+    if (ADCD1.grpp != NULL)

+      _adc_isr_error_code(&ADCD1, ADC_ERR_OVERFLOW);

+  }

+  /* TODO: Add here analog watchdog handling.*/

+

+  CH_IRQ_EPILOGUE();

+}

+#endif

+

+/*===========================================================================*/

+/* Driver exported functions.                                                */

+/*===========================================================================*/

+

+/**

+ * @brief   Low level ADC driver initialization.

+ *

+ * @notapi

+ */

+void adc_lld_init(void) {

+

+#if STM32_ADC_USE_ADC1

+  /* Driver initialization.*/

+  adcObjectInit(&ADCD1);

+  ADCD1.adc = ADC1;

+  ADCD1.dmastp  = STM32_DMA1_STREAM1;

+  ADCD1.dmamode = STM32_DMA_CR_PL(STM32_ADC_ADC1_DMA_PRIORITY) |

+                  STM32_DMA_CR_DIR_P2M |

+                  STM32_DMA_CR_MSIZE_HWORD | STM32_DMA_CR_PSIZE_HWORD |

+                  STM32_DMA_CR_MINC        | STM32_DMA_CR_TCIE        |

+                  STM32_DMA_CR_DMEIE       | STM32_DMA_CR_TEIE        |

+                  STM32_DMA_CR_EN;

+#endif

+

+  /* The shared vector is initialized on driver initialization and never

+     disabled.*/

+  nvicEnableVector(ADC1_COMP_IRQn,

+                   CORTEX_PRIORITY_MASK(STM32_ADC_IRQ_PRIORITY));

+}

+

+/**

+ * @brief   Configures and activates the ADC peripheral.

+ *

+ * @param[in] adcp      pointer to the @p ADCDriver object

+ *

+ * @notapi

+ */

+void adc_lld_start(ADCDriver *adcp) {

+

+  /* If in stopped state then enables the ADC and DMA clocks.*/

+  if (adcp->state == ADC_STOP) {

+#if STM32_ADC_USE_ADC1

+    if (&ADCD1 == adcp) {

+      bool_t b;

+      b = dmaStreamAllocate(adcp->dmastp,

+                            STM32_ADC_ADC1_DMA_IRQ_PRIORITY,

+                            (stm32_dmaisr_t)adc_lld_serve_rx_interrupt,

+                            (void *)adcp);

+      chDbgAssert(!b, "adc_lld_start(), #1", "stream already allocated");

+      dmaStreamSetPeripheral(adcp->dmastp, &ADC1->DR);

+      rccEnableADC1(FALSE);

+    }

+#endif /* STM32_ADC_USE_ADC1 */

+

+    /* ADC initial setup, starting the analog part here in order to reduce

+       the latency when starting a conversion.*/

+    adcp->adc->CR = ADC_CR_ADEN;

+    while (!(adcp->adc->ISR & ADC_ISR_ADRDY))

+      ;

+  }

+}

+

+/**

+ * @brief   Deactivates the ADC peripheral.

+ *

+ * @param[in] adcp      pointer to the @p ADCDriver object

+ *

+ * @notapi

+ */

+void adc_lld_stop(ADCDriver *adcp) {

+

+  /* If in ready state then disables the ADC clock and analog part.*/

+  if (adcp->state == ADC_READY) {

+

+    dmaStreamRelease(adcp->dmastp);

+

+    /* Disabling ADC.*/

+    if (adcp->adc->CR & ADC_CR_ADEN) {

+      adc_lld_stop_adc(adcp->adc);

+      adcp->adc->CR |= ADC_CR_ADDIS;

+      while (adcp->adc->CR & ADC_CR_ADDIS)

+        ;

+    }

+

+#if STM32_ADC_USE_ADC1

+    if (&ADCD1 == adcp)

+      rccDisableADC1(FALSE);

+#endif

+  }

+}

+

+/**

+ * @brief   Starts an ADC conversion.

+ *

+ * @param[in] adcp      pointer to the @p ADCDriver object

+ *

+ * @notapi

+ */

+void adc_lld_start_conversion(ADCDriver *adcp) {

+  uint32_t mode;

+  const ADCConversionGroup *grpp = adcp->grpp;

+

+  /* DMA setup.*/

+  mode = adcp->dmamode;

+  if (grpp->circular) {

+    mode |= STM32_DMA_CR_CIRC;

+  }

+  if (adcp->depth > 1) {

+    /* If the buffer depth is greater than one then the half transfer interrupt

+       interrupt is enabled in order to allows streaming processing.*/

+    mode |= STM32_DMA_CR_HTIE;

+  }

+  dmaStreamSetMemory0(adcp->dmastp, adcp->samples);

+  dmaStreamSetTransactionSize(adcp->dmastp, (uint32_t)grpp->num_channels *

+                                            (uint32_t)adcp->depth);

+  dmaStreamSetMode(adcp->dmastp, mode);

+

+  /* ADC setup.*/

+  adcp->adc->ISR    = adcp->adc->ISR;

+  adcp->adc->IER    = ADC_IER_OVRIE;

+  adcp->adc->SMPR   = grpp->smpr;

+  adcp->adc->CHSELR = grpp->chselr;

+

+  /* ADC configuration and start.*/

+  adcp->adc->CFGR1  = grpp->cfgr1 | ADC_CFGR1_CONT  | ADC_CFGR1_DMACFG |

+                                    ADC_CFGR1_DMAEN;

+  adcp->adc->CR    |= ADC_CR_ADSTART;

+}

+

+/**

+ * @brief   Stops an ongoing conversion.

+ *

+ * @param[in] adcp      pointer to the @p ADCDriver object

+ *

+ * @notapi

+ */

+void adc_lld_stop_conversion(ADCDriver *adcp) {

+

+  dmaStreamDisable(adcp->dmastp);

+  adc_lld_stop_adc(adcp->adc);

+}

+

+/**

+ * @brief   Enables the TSVREFE bit.

+ * @details The TSVREFE bit is required in order to sample the internal

+ *          temperature sensor and internal reference voltage.

+ * @note    This is an STM32-only functionality.

+ */

+void adcSTM32EnableTSVREFE(void) {

+

+  ADC->CCR |= ADC_CCR_VREFEN;

+}

+

+/**

+ * @brief   Disables the TSVREFE bit.

+ * @details The TSVREFE bit is required in order to sample the internal

+ *          temperature sensor and internal reference voltage.

+ * @note    This is an STM32-only functionality.

+ */

+void adcSTM32DisableTSVREFE(void) {

+

+  ADC->CCR &= ~ADC_CCR_VREFEN;

+}

+

+#endif /* HAL_USE_ADC */

+

+/** @} */

diff --git a/os/hal/platforms/STM32F0xx/adc_lld.h b/os/hal/platforms/STM32F0xx/adc_lld.h
new file mode 100644
index 000000000..3be5a053c
--- /dev/null
+++ b/os/hal/platforms/STM32F0xx/adc_lld.h
@@ -0,0 +1,293 @@
+/*

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

+                 2011,2012 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    STM32F0xx/adc_lld.h

+ * @brief   STM32F0xx ADC subsystem low level driver header.

+ *

+ * @addtogroup ADC

+ * @{

+ */

+

+#ifndef _ADC_LLD_H_

+#define _ADC_LLD_H_

+

+#if HAL_USE_ADC || defined(__DOXYGEN__)

+

+/*===========================================================================*/

+/* Driver constants.                                                         */

+/*===========================================================================*/

+

+/**

+ * @name    Sampling rates

+ * @{

+ */

+#define ADC_SAMPLE_1P5          0   /**< @brief 14 cycles conversion time   */

+#define ADC_SAMPLE_7P5          1   /**< @brief 21 cycles conversion time.  */

+#define ADC_SAMPLE_13P5         2   /**< @brief 28 cycles conversion time.  */

+#define ADC_SAMPLE_28P5         3   /**< @brief 41 cycles conversion time.  */

+#define ADC_SAMPLE_41P5         4   /**< @brief 54 cycles conversion time.  */

+#define ADC_SAMPLE_55P5         5   /**< @brief 68 cycles conversion time.  */

+#define ADC_SAMPLE_71P5         6   /**< @brief 84 cycles conversion time.  */

+#define ADC_SAMPLE_239P5        7   /**< @brief 252 cycles conversion time. */

+/** @} */

+

+/*===========================================================================*/

+/* Driver pre-compile time settings.                                         */

+/*===========================================================================*/

+

+/**

+ * @name    Configuration options

+ * @{

+ */

+/**

+ * @brief   ADC1 driver enable switch.

+ * @details If set to @p TRUE the support for ADC1 is included.

+ * @note    The default is @p TRUE.

+ */

+#if !defined(STM32_ADC_USE_ADC1) || defined(__DOXYGEN__)

+#define STM32_ADC_USE_ADC1                  TRUE

+#endif

+

+/**

+ * @brief   ADC1 DMA priority (0..3|lowest..highest).

+ */

+#if !defined(STM32_ADC_ADC1_DMA_PRIORITY) || defined(__DOXYGEN__)

+#define STM32_ADC_ADC1_DMA_PRIORITY         2

+#endif

+

+/**

+ * @brief   ADC interrupt priority level setting.

+ */

+#if !defined(STM32_ADC_IRQ_PRIORITY) || defined(__DOXYGEN__)

+#define STM32_ADC_IRQ_PRIORITY              2

+#endif

+

+/**

+ * @brief   ADC1 DMA interrupt priority level setting.

+ */

+#if !defined(STM32_ADC_ADC1_DMA_IRQ_PRIORITY) || defined(__DOXYGEN__)

+#define STM32_ADC_ADC1_DMA_IRQ_PRIORITY     2

+#endif

+

+/** @} */

+

+/*===========================================================================*/

+/* Derived constants and error checks.                                       */

+/*===========================================================================*/

+

+#if STM32_ADC_USE_ADC1 && !STM32_HAS_ADC1

+#error "ADC1 not present in the selected device"

+#endif

+

+#if !STM32_ADC_USE_ADC1

+#error "ADC driver activated but no ADC peripheral assigned"

+#endif

+

+#if !defined(STM32_DMA_REQUIRED)

+#define STM32_DMA_REQUIRED

+#endif

+

+/*===========================================================================*/

+/* Driver data structures and types.                                         */

+/*===========================================================================*/

+

+/**

+ * @brief   ADC sample data type.

+ */

+typedef uint16_t adcsample_t;

+

+/**

+ * @brief   Channels number in a conversion group.

+ */

+typedef uint16_t adc_channels_num_t;

+

+/**

+ * @brief   Possible ADC failure causes.

+ * @note    Error codes are architecture dependent and should not relied

+ *          upon.

+ */

+typedef enum {

+  ADC_ERR_DMAFAILURE = 0,                   /**< DMA operations failure.    */

+  ADC_ERR_OVERFLOW = 1                      /**< ADC overflow condition.    */

+} adcerror_t;

+

+/**

+ * @brief   Type of a structure representing an ADC driver.

+ */

+typedef struct ADCDriver ADCDriver;

+

+/**

+ * @brief   ADC notification callback type.

+ *

+ * @param[in] adcp      pointer to the @p ADCDriver object triggering the

+ *                      callback

+ * @param[in] buffer    pointer to the most recent samples data

+ * @param[in] n         number of buffer rows available starting from @p buffer

+ */

+typedef void (*adccallback_t)(ADCDriver *adcp, adcsample_t *buffer, size_t n);

+

+/**

+ * @brief   ADC error callback type.

+ *

+ * @param[in] adcp      pointer to the @p ADCDriver object triggering the

+ *                      callback

+ */

+typedef void (*adcerrorcallback_t)(ADCDriver *adcp, adcerror_t err);

+

+/**

+ * @brief   Conversion group configuration structure.

+ * @details This implementation-dependent structure describes a conversion

+ *          operation.

+ * @note    The use of this configuration structure requires knowledge of

+ *          STM32 ADC cell registers interface, please refer to the STM32

+ *          reference manual for details.

+ */

+typedef struct {

+  /**

+   * @brief   Enables the circular buffer mode for the group.

+   */

+  bool_t                    circular;

+  /**

+   * @brief   Number of the analog channels belonging to the conversion group.

+   */

+  adc_channels_num_t        num_channels;

+  /**

+   * @brief   Callback function associated to the group or @p NULL.

+   */

+  adccallback_t             end_cb;

+  /**

+   * @brief   Error callback or @p NULL.

+   */

+  adcerrorcallback_t        error_cb;

+  /* End of the mandatory fields.*/

+  /**

+   * @brief   ADC CFGR1 register initialization data.

+   */

+  uint32_t                  cfgr1;

+  /**

+   * @brief   ADC SMPR register initialization data.

+   */

+  uint32_t                  smpr;

+  /**

+   * @brief   ADC CHSELR register initialization data.

+   * @details The number of bits at logic level one in this register must

+   *          be equal to the number in the @p num_channels field.

+   */

+  uint32_t                  chselr;

+} ADCConversionGroup;

+

+/**

+ * @brief   Driver configuration structure.

+ * @note    It could be empty on some architectures.

+ */

+typedef struct {

+  uint32_t                  dummy;

+} ADCConfig;

+

+/**

+ * @brief   Structure representing an ADC driver.

+ */

+struct ADCDriver {

+  /**

+   * @brief Driver state.

+   */

+  adcstate_t                state;

+  /**

+   * @brief Current configuration data.

+   */

+  const ADCConfig           *config;

+  /**

+   * @brief Current samples buffer pointer or @p NULL.

+   */

+  adcsample_t               *samples;

+  /**

+   * @brief Current samples buffer depth or @p 0.

+   */

+  size_t                    depth;

+  /**

+   * @brief Current conversion group pointer or @p NULL.

+   */

+  const ADCConversionGroup  *grpp;

+#if ADC_USE_WAIT || defined(__DOXYGEN__)

+  /**

+   * @brief Waiting thread.

+   */

+  Thread                    *thread;

+#endif

+#if ADC_USE_MUTUAL_EXCLUSION || defined(__DOXYGEN__)

+#if CH_USE_MUTEXES || defined(__DOXYGEN__)

+  /**

+   * @brief Mutex protecting the peripheral.

+   */

+  Mutex                     mutex;

+#elif CH_USE_SEMAPHORES

+  Semaphore                 semaphore;

+#endif

+#endif /* ADC_USE_MUTUAL_EXCLUSION */

+#if defined(ADC_DRIVER_EXT_FIELDS)

+  ADC_DRIVER_EXT_FIELDS

+#endif

+  /* End of the mandatory fields.*/

+  /**

+   * @brief Pointer to the ADCx registers block.

+   */

+  ADC_TypeDef               *adc;

+  /**

+   * @brief Pointer to associated SMA channel.

+   */

+  const stm32_dma_stream_t  *dmastp;

+  /**

+   * @brief DMA mode bit mask.

+   */

+  uint32_t                  dmamode;

+};

+

+/*===========================================================================*/

+/* Driver macros.                                                            */

+/*===========================================================================*/

+

+/*===========================================================================*/

+/* External declarations.                                                    */

+/*===========================================================================*/

+

+#if STM32_ADC_USE_ADC1 && !defined(__DOXYGEN__)

+extern ADCDriver ADCD1;

+#endif

+

+#ifdef __cplusplus

+extern "C" {

+#endif

+  void adc_lld_init(void);

+  void adc_lld_start(ADCDriver *adcp);

+  void adc_lld_stop(ADCDriver *adcp);

+  void adc_lld_start_conversion(ADCDriver *adcp);

+  void adc_lld_stop_conversion(ADCDriver *adcp);

+  void adcSTM32EnableTSVREFE(void);

+  void adcSTM32DisableTSVREFE(void);

+#ifdef __cplusplus

+}

+#endif

+

+#endif /* HAL_USE_ADC */

+

+#endif /* _ADC_LLD_H_ */

+

+/** @} */

diff --git a/os/hal/platforms/STM32F0xx/platform.mk b/os/hal/platforms/STM32F0xx/platform.mk
index 9d13d064a..9c0e709df 100644
--- a/os/hal/platforms/STM32F0xx/platform.mk
+++ b/os/hal/platforms/STM32F0xx/platform.mk
@@ -1,5 +1,6 @@
 # List of all the STM32F1xx platform files.

 PLATFORMSRC = ${CHIBIOS}/os/hal/platforms/STM32F0xx/stm32_dma.c \

+              ${CHIBIOS}/os/hal/platforms/STM32F0xx/adc_lld.c \

               ${CHIBIOS}/os/hal/platforms/STM32F0xx/hal_lld.c \

               ${CHIBIOS}/os/hal/platforms/STM32/GPIOv2/pal_lld.c \

               ${CHIBIOS}/os/hal/platforms/STM32/serial_lld.c	\