From 6ccef4b00a5ab12265f57bcc70d7090aaf08163c Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Mon, 25 Aug 2014 08:45:58 +0000
Subject: git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7190
 35acf78f-673a-0410-8e92-d51de3d6d3f4

---
 os/hal/ports/STM32/STM32F0xx/adc_lld.c | 11 ++++++-----
 os/hal/ports/STM32/STM32F0xx/adc_lld.h | 27 +++++++++++++++++++++------
 2 files changed, 27 insertions(+), 11 deletions(-)

(limited to 'os')

diff --git a/os/hal/ports/STM32/STM32F0xx/adc_lld.c b/os/hal/ports/STM32/STM32F0xx/adc_lld.c
index 1cc1bdcd1..753f4ac43 100644
--- a/os/hal/ports/STM32/STM32F0xx/adc_lld.c
+++ b/os/hal/ports/STM32/STM32F0xx/adc_lld.c
@@ -245,13 +245,15 @@ void adc_lld_stop(ADCDriver *adcp) {
  * @notapi
  */
 void adc_lld_start_conversion(ADCDriver *adcp) {
-  uint32_t mode;
+  uint32_t mode, cfgr1;
   const ADCConversionGroup *grpp = adcp->grpp;
 
   /* DMA setup.*/
-  mode = adcp->dmamode;
+  mode  = adcp->dmamode;
+  cfgr1 = grpp->cfgr1 | ADC_CFGR1_DMAEN;
   if (grpp->circular) {
-    mode |= STM32_DMA_CR_CIRC;
+    mode  |= STM32_DMA_CR_CIRC;
+    cfgr1 |= ADC_CFGR1_DMACFG;
     if (adcp->depth > 1) {
       /* If circular buffer depth > 1, then the half transfer interrupt
          is enabled in order to allow streaming processing.*/
@@ -273,8 +275,7 @@ void adc_lld_start_conversion(ADCDriver *adcp) {
   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->CFGR1  = cfgr1;
   adcp->adc->CR    |= ADC_CR_ADSTART;
 }
 
diff --git a/os/hal/ports/STM32/STM32F0xx/adc_lld.h b/os/hal/ports/STM32/STM32F0xx/adc_lld.h
index 4ccd50eb7..ec765df67 100644
--- a/os/hal/ports/STM32/STM32F0xx/adc_lld.h
+++ b/os/hal/ports/STM32/STM32F0xx/adc_lld.h
@@ -46,20 +46,30 @@
 /** @} */
 
 /**
- * @name    Resolution
+ * @name    CFGR1 register configuration helpers
  * @{
  */
-#define ADC_CFGR1_RES_12BIT     (0 << 3)
-#define ADC_CFGR1_RES_10BIT     (1 << 3)
-#define ADC_CFGR1_RES_8BIT      (2 << 3)
-#define ADC_CFGR1_RES_6BIT      (3 << 3)
+#define ADC_CFGR1_RES_12BIT             (0 << 3)
+#define ADC_CFGR1_RES_10BIT             (1 << 3)
+#define ADC_CFGR1_RES_8BIT              (2 << 3)
+#define ADC_CFGR1_RES_6BIT              (3 << 3)
+
+#define ADC_CFGR1_EXTSEL_MASK           (15 << 6)
+#define ADC_CFGR1_EXTSEL_SRC(n)         ((n) << 6)
+
+#define ADC_CFGR1_EXTEN_MASK            (3 << 10)
+#define ADC_CFGR1_EXTEN_DISABLED        (0 << 10)
+#define ADC_CFGR1_EXTEN_RISING          (1 << 10)
+#define ADC_CFGR1_EXTEN_FALLING         (2 << 10)
+#define ADC_CFGR1_EXTEN_BOTH            (3 << 10)
 /** @} */
 
 /**
  * @name    Threashold register initializer
  * @{
  */
-#define ADC_TR(low, high)       (((uint32_t)(high) << 16) | (uint32_t)(low))
+#define ADC_TR(low, high)               (((uint32_t)(high) << 16) |         \
+                                         (uint32_t)(low))
 /** @} */
 
 /*===========================================================================*/
@@ -210,6 +220,11 @@ typedef struct {
   /* End of the mandatory fields.*/
   /**
    * @brief   ADC CFGR1 register initialization data.
+   * @note    The bits DMAEN and DMACFG are enforced internally
+   *          to the driver, keep them to zero.
+   * @note    The bits @p ADC_CFGR1_CONT or @p ADC_CFGR1_DISCEN must be
+   *          specified in continuous more or if the buffer depth is
+   *          greater than one.
    */
   uint32_t                  cfgr1;
   /**
-- 
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