Hi I am implementing a nrf24l01 driver with the use of stm32F4
the SPI transmit and receive works with the polling method yet not with DMA method.I already configured the DMA on cube mx and IAR WORKBENCH
this is the code part i put the dma as cmnt //3. Read single byte from a registeruint8_t NRF24_read_register(uint8_t reg){ uint8_t spiBuf[3]; uint8_t retData; //Put CSN low NRF24_csn(0); //Transmit register address spiBuf[0] = reg&0x1F; HAL_SPI_Transmit(&nrf24_hspi, spiBuf, 1, 100); // HAL_SPI_Transmi_DMA(&nrf24_hspi, spiBuf, 1); //Receive data HAL_SPI_Receive(&nrf24_hspi, &spiBuf[1], 1, 100); // HAL_SPI_Receive_DMA(&nrf24_hspi, &spiBuf[1], 1); retData = spiBuf[1]; //Bring CSN high NRF24_csn(1); return retData;}//4. Read multiple bytes registervoid NRF24_read_registerN(uint8_t reg, uint8_t *buf, uint8_t len){ uint8_t spiBuf[3]; //Put CSN low NRF24_csn(0);  
