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LL_MemcpyDma

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This commit is contained in:
Attila Body 2019-11-04 14:26:48 +01:00
parent 4de62c7f74
commit bdc796a8ce
8 changed files with 45 additions and 19 deletions
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19
lib/ll_memcpydma.cpp
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@ -15,4 +15,23 @@ LL_MemcpyDma::LL_MemcpyDma(DMA_TypeDef *dma, uint32_t stream)
LL_DMA_EnableIT_TC(dma, stream);
}
void* LL_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 LL_MemcpyDma::DmaTransferCompleted()
{
if(*GetIsReg() & GetTcMask()) { // DMA transfer complete
*GetIcfReg() = GetTcMask();
LL_DMA_DisableStream(GetDma(), GetStream());
m_busy = 0;
}
}
} /* namespace f4ll */

10
lib/ll_memcpydma.h
View file

@ -8,15 +8,19 @@
#ifndef LL_MEMCPY_DMA_H_
#define LL_MEMCPY_DMA_H_
#include "ll_dmahelper.h"
#include "singleton.h"
namespace f4ll {
class LL_MemcpyDma : private LL_DmaHelper
class LL_MemcpyDma : public Singleton<LL_MemcpyDma>, private LL_DmaHelper
{
friend class Singleton<LL_MemcpyDma>;
public:
void* Copy(void *dst, void const *src, uint16_t length);
void DmaTransferCompleted();
private:
LL_MemcpyDma(DMA_TypeDef *dma, uint32_t stream);
void Copy(void *dst, void const *src, uint16_t length);
bool volatile m_busy = false;
};
} /* namespace f4ll */

3
lib/singleton.h
View file

@ -10,8 +10,7 @@ public:
static T &Init(Args &&... args)
{
static T instance{ std::forward<Args>(args)... };
if(!m_instance)
m_instance = &instance;
m_instance = &instance;
return instance;
}