39 lines
859 B
C++
39 lines
859 B
C++
/*
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* memcpy_dma.c
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*
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* Created on: Oct 1, 2019
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* Author: abody
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*/
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#include <f4ll_cpp/dmahelper.h>
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#include <f4ll_cpp/memcpydma.h>
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namespace f4ll_cpp {
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MemcpyDma::MemcpyDma(DMA_TypeDef *dma, uint32_t stream) :
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DmaHelper(dma, stream),
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m_busy(false)
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{
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LL_DMA_EnableIT_TC(dma, stream);
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}
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void* MemcpyDma::Copy(void *dst, void const *src, size_t length)
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{
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while(m_busy);
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LL_DMA_SetM2MSrcAddress(GetDma(), GetStream(), (uint32_t)src);
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LL_DMA_SetM2MDstAddress(GetDma(), GetStream(), (uint32_t)dst);
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LL_DMA_SetDataLength(GetDma(), GetStream(), (length+3)/4 );
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m_busy = true;
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LL_DMA_EnableStream(GetDma(), GetStream());
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return dst;
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}
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void MemcpyDma::HandleDmaIrq(void)
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{
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if(*GetIsReg() & GetTcMask()) { // DMA transfer complete
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*GetIfcReg() = GetTcMask();
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LL_DMA_DisableStream(GetDma(), GetStream());
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m_busy = false;
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}
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}
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} // f4ll_cpp
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