From 2a74bb8d6c4e707e58b198ed5a1b69199dcb9103 Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Sun, 30 Sep 2012 15:40:06 +0000
Subject: Updated STM32F1, F2, F4, L1 ADC drivers to allow HW triggering.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@4728 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 os/hal/platforms/STM32F1xx/adc_lld.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

(limited to 'os/hal/platforms/STM32F1xx')

diff --git a/os/hal/platforms/STM32F1xx/adc_lld.c b/os/hal/platforms/STM32F1xx/adc_lld.c
index c5fb252a8..d87cc7917 100644
--- a/os/hal/platforms/STM32F1xx/adc_lld.c
+++ b/os/hal/platforms/STM32F1xx/adc_lld.c
@@ -181,7 +181,7 @@ void adc_lld_stop(ADCDriver *adcp) {
  * @notapi
  */
 void adc_lld_start_conversion(ADCDriver *adcp) {
-  uint32_t mode, n;
+  uint32_t mode, n, cr2;
   const ADCConversionGroup *grpp = adcp->grpp;
 
   /* DMA setup.*/
@@ -203,7 +203,10 @@ void adc_lld_start_conversion(ADCDriver *adcp) {
 
   /* ADC setup.*/
   adcp->adc->CR1   = grpp->cr1 | ADC_CR1_SCAN;
-  adcp->adc->CR2   = grpp->cr2 | ADC_CR2_DMA | ADC_CR2_CONT | ADC_CR2_ADON;
+  cr2 = grpp->cr2 | ADC_CR2_DMA | ADC_CR2_ADON;
+  if ((cr2 & (ADC_CR2_EXTTRIG | ADC_CR2_JEXTTRIG)) == 0)
+    cr2 |= ADC_CR2_CONT;
+  adcp->adc->CR2   = grpp->cr2 | cr2;
   adcp->adc->SMPR1 = grpp->smpr1;
   adcp->adc->SMPR2 = grpp->smpr2;
   adcp->adc->SQR1  = grpp->sqr1;
@@ -211,7 +214,7 @@ void adc_lld_start_conversion(ADCDriver *adcp) {
   adcp->adc->SQR3  = grpp->sqr3;
 
   /* ADC start by writing ADC_CR2_ADON a second time.*/
-  adcp->adc->CR2   = grpp->cr2 | ADC_CR2_DMA | ADC_CR2_CONT | ADC_CR2_ADON;
+  adcp->adc->CR2   = cr2;
 }
 
 /**
-- 
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