38 lines
881 B
C++
38 lines
881 B
C++
/*
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* llmemcpydma.cpp
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*
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* Created on: Nov 4, 2019
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* Author: abody
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*/
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#include <f4ll/memcpy_dma.h>
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namespace f4ll {
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MemcpyDma::MemcpyDma(DMA_TypeDef *dma, uint32_t stream)
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: dma_helper(dma, stream)
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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, uint16_t length)
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{
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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 = 1;
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LL_DMA_EnableStream(GetDma(), GetStream());
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while (m_busy)
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;
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return dst;
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}
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void MemcpyDma::DmaTransferCompleted()
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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 = 0;
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}
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}
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} /* namespace f4ll */
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