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usart_handler: DMA based memory copy

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This commit is contained in:
Attila Body 2019-10-01 14:49:10 +02:00
parent e8ab90c2b3
commit ecd6c1d5d6
13 changed files with 367 additions and 408 deletions
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39
lib/memcpy_dma.c Normal file
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/*
* memcpy_dma.c
*
* Created on: Oct 1, 2019
* Author: abody
*/
#include "memcpy_dma.h"
#include "dma_helper.h"
volatile uint8_t g_memcpyDmaBusy = 0;
static DMAINFO g_memcpyDmaInfo;
void InitMemcpyDma(DMA_TypeDef *dma, uint32_t stream)
{
InitDmaInfo(&g_memcpyDmaInfo, dma, stream);
LL_DMA_EnableIT_TC(dma, stream);
}
void * MemcpyDma(void *dst, void const *src, size_t length)
{
LL_DMA_SetM2MSrcAddress(g_memcpyDmaInfo.dma, g_memcpyDmaInfo.stream, (uint32_t)src);
LL_DMA_SetM2MDstAddress(g_memcpyDmaInfo.dma, g_memcpyDmaInfo.stream, (uint32_t)dst);
LL_DMA_SetDataLength(g_memcpyDmaInfo.dma, g_memcpyDmaInfo.stream, (length+3)/4 );
g_memcpyDmaBusy = 1;
//DIAG_CRC_CALC_START();
LL_DMA_EnableStream(g_memcpyDmaInfo.dma, g_memcpyDmaInfo.stream);
while(g_memcpyDmaBusy);
return dst;
}
void HandleMemcpyDmaIrq()
{
if(*g_memcpyDmaInfo.isReg & g_memcpyDmaInfo.tcMask) { // DMA transfer complete
*g_memcpyDmaInfo.ifcReg = g_memcpyDmaInfo.tcMask;
LL_DMA_DisableStream(g_memcpyDmaInfo.dma, g_memcpyDmaInfo.stream);
g_memcpyDmaBusy = 0;
}
}