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Implement stm32_dmaresidual for the F1 DMA driver.

This commit is contained in:
px4dev 2013-01-08 01:11:35 -08:00
parent 7c2445f74d
commit 7c7112a157
1 changed files with 18 additions and 0 deletions
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18
nuttx/arch/arm/src/stm32/stm32f10xxx_dma.c
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@ -558,6 +558,24 @@ void stm32_dmastop(DMA_HANDLE handle)
stm32_dmachandisable(dmach);
}
/****************************************************************************
* Name: stm32_dmaresidual
*
* Description:
* Returns the number of bytes remaining to be transferred
*
* Assumptions:
* - DMA handle allocated by stm32_dmachannel()
*
****************************************************************************/
size_t stm32_dmaresidual(DMA_HANDLE handle)
{
struct stm32_dma_s *dmach = (struct stm32_dma_s *)handle;
return dmachan_getreg(dmach, STM32_DMACHAN_CNDTR_OFFSET);
}
/****************************************************************************
* Name: stm32_dmasample
*