/*
 * llmemcpydma.cpp
 *
 *  Created on: Nov 4, 2019
 *      Author: abody
 */

#include "f4ll/memcpydma.h"

namespace f4ll {

MemcpyDma::MemcpyDma(DMA_TypeDef *dma, uint32_t stream)
: DmaHelper(dma, stream)
{
	LL_DMA_EnableIT_TC(dma, stream);
}

void* MemcpyDma::Copy(void *dst, void const *src, uint16_t length)
{
	LL_DMA_SetM2MSrcAddress(GetDma(), GetStream(), (uint32_t)src);
	LL_DMA_SetM2MDstAddress(GetDma(), GetStream(), (uint32_t)dst);
	LL_DMA_SetDataLength(GetDma(), GetStream(), (length+3)/4 );
	m_busy = 1;
	LL_DMA_EnableStream(GetDma(), GetStream());
	while(m_busy);
	return dst;
}

void MemcpyDma::DmaTransferCompleted()
{
	if(*GetIsReg() & GetTcMask()) {	// DMA transfer complete
		*GetIfcReg() = GetTcMask();
		LL_DMA_DisableStream(GetDma(), GetStream());
		m_busy = 0;
	}
}
} /* namespace f4ll */