Question
How to modify stm32-w25qxx example code to use SPI with DMA ?
I am using this example to read data from an external flash (W25Q128) using SPI on a NUCLEO-L433RC-P board...
https://stm32world.com/wiki/STM32_W25Qxx
The code is here...
https://github.com/lbthomsen/stm32-w25qxx
How do I modify this example to use SPI with DMA ?
The end result is to read a WAV file from the external flash and play it using the internal DAC.
I have enabled DMA for SPI...
But don't know what other modifications I need to make.
In w25qxx.c, I tried changing...
if (HAL_SPI_Receive(w25qxx->spiHandle, buf, len, HAL_MAX_DELAY) == HAL_OK) {to...
if (HAL_SPI_Receive_DMA(w25qxx->spiHandle, buf, len) == HAL_OK) {but when I step through the code it jumps to the HardFault_Handler.
I will need to use double DMA buffers, so that the DAC reads from one buffer whilst the external flash writes to the other buffer (for glitchless playback)