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STM32 F1 DAM fix from David Sidrane

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This commit is contained in:
Gregory Nutt
2013-10-23 14:05:26 -06:00
parent 6a4ffaca12
commit 7692af99b6
1 changed files with 12 additions and 3 deletions
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arch/arm/src/stm32/stm32f10xxx_dma.c
+12 -3
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@@ -457,11 +457,20 @@ void stm32_dmafree(DMA_HANDLE handle)
*
****************************************************************************/
void stm32_dmasetup(DMA_HANDLE handle, uint32_t paddr, uint32_t maddr, size_t ntransfers, uint32_t ccr)
void stm32_dmasetup(DMA_HANDLE handle, uint32_t paddr, uint32_t maddr,
size_t ntransfers, uint32_t ccr)
{
struct stm32_dma_s *dmach = (struct stm32_dma_s *)handle;
uint32_t regval;
/* Then DMA_CNDTRx register can only be modified if the DMA channel is
* disabled.
*/
regval = dmachan_getreg(dmach, STM32_DMACHAN_CCR_OFFSET);
regval &= ~(DMA_CCR_EN);
dmachan_putreg(dmach, STM32_DMACHAN_CCR_OFFSET, regval);
/* Set the peripheral register address in the DMA_CPARx register. The data
* will be moved from/to this address to/from the memory after the
* peripheral event.
@@ -508,7 +517,8 @@ void stm32_dmasetup(DMA_HANDLE handle, uint32_t paddr, uint32_t maddr, size_t nt
*
****************************************************************************/
void stm32_dmastart(DMA_HANDLE handle, dma_callback_t callback, void *arg, bool half)
void stm32_dmastart(DMA_HANDLE handle, dma_callback_t callback,
void *arg, bool half)
{
struct stm32_dma_s *dmach = (struct stm32_dma_s *)handle;
uint32_t ccr;
@@ -542,7 +552,6 @@ void stm32_dmastart(DMA_HANDLE handle, dma_callback_t callback, void *arg, bool
*/
ccr |= (half ? (DMA_CCR_HTIE|DMA_CCR_TEIE) : (DMA_CCR_TCIE|DMA_CCR_TEIE));
}
else
{