Kinda works

components/f4ll_cpp/memcpydma.cpp

@@ -0,0 +1,39 @@
+/*
+ * memcpy_dma.c
+ *
+ *  Created on: Oct 1, 2019
+ *      Author: abody
+ */
+#include <f4ll_cpp/dmahelper.h>
+#include <f4ll_cpp/memcpydma.h>
+
+namespace f4ll_cpp {
+
+MemcpyDma::MemcpyDma(DMA_TypeDef *dma, uint32_t stream) :
+	DmaHelper(dma, stream),
+	m_busy(false)
+{
+	LL_DMA_EnableIT_TC(dma, stream);
+}
+
+void* MemcpyDma::Copy(void *dst, void const *src, size_t length)
+{
+	while(m_busy);
+	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 = true;
+	LL_DMA_EnableStream(GetDma(), GetStream());
+	return dst;
+}
+
+void MemcpyDma::HandleDmaIrq(void)
+{
+	if(*GetIsReg() & GetTcMask()) {	// DMA transfer complete
+		*GetIfcReg() = GetTcMask();
+		LL_DMA_DisableStream(GetDma(), GetStream());
+		m_busy = false;
+	}
+}
+
+}	//	f4ll_cpp