Hello,
I have a DMA stream working in Normal mode (Mem to Peripheral). This by itself is working properly (without MDMA).
I want to configure MDMA to set the next parameters for the DMA to handle.
I configure 4 words (4 uint_32) in memory for writing them to the DMA registers when transfer is complete:
struct {
uint32_t nextCR;
uint32_t nextSize;
uint32_t nextPAR;
uint32_t nextBuff;
} NextRegisters;
I configure MDMA with:
DMA transfer complete event to trigger 4X4 bytes transfer from my NextRegisters to the DMA registers (they are at 0x40020000) using HAL_MDMA_Init()
Then I start the MDMA using HAL_MDMA_Start(&hmdma, (uint32_t)&NextRegister, (uint32_t) dma_generator->Instance, 4* sizeof(uint32_t));
When I poll for execution using HAL_MDMA_PollForTransfer(&mdma,HAL_MDMA_FULL_TRANSFER,1000) inside the interrupt handler of the DMA transfer complete I get a WRITE TRANSFER ERROR, and the DMA registers are scrambled.
What am I doing wrong?
