How to modify stm32-w25qxx example code to use SPI with DMA ?

[freeflyer]

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)

[Saket_Om]

Hello @freeflyer 

Could you share your SPI and DMA setting please?

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@freeflyer wrote:

but when I step through the code it jumps to the HardFault_Handler.

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On which instruction it goes to hardfault?

Please refer to the article below to debug hardfault:

How to debug a HardFault on an Arm® Cortex®-M STM3... - STMicroelectronics Community