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Disable interrupts while accessing the APB2RTSR register 

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4212 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo 2011-12-22 03:09:25 +00:00
parent 59f355daeb
commit 907471d5dc
1 changed files with 8 additions and 0 deletions
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8
nuttx/arch/arm/src/stm32/stm32_adc.c
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@ -823,6 +823,7 @@ static void adc_startconv(struct stm32_dev_s *priv, bool enable)
static void adc_rccreset(struct stm32_dev_s *priv, bool reset) static void adc_rccreset(struct stm32_dev_s *priv, bool reset)
{ {
irqstate_t flags;
uint32_t regval; uint32_t regval;
uint32_t adcbit; uint32_t adcbit;
@ -860,6 +861,12 @@ static void adc_rccreset(struct stm32_dev_s *priv, bool reset)
adcbit = RCC_APB2RSTR_ADCRST; adcbit = RCC_APB2RSTR_ADCRST;
#endif #endif
/* Disable interrupts. This is necessary because the APB2RTSR register
* is used by several different drivers.
*/
flags = irqsave();
/* Set or clear the selected bit in the APB2 reset register */ /* Set or clear the selected bit in the APB2 reset register */
regval = getreg32(STM32_RCC_APB2RSTR); regval = getreg32(STM32_RCC_APB2RSTR);
@ -876,6 +883,7 @@ static void adc_rccreset(struct stm32_dev_s *priv, bool reset)
regval &= ~adcbit; regval &= ~adcbit;
} }
putreg32(regval, STM32_RCC_APB2RSTR); putreg32(regval, STM32_RCC_APB2RSTR);
irqrestore(flags);
} }
/******************************************************************************* /*******************************************************************************