DMA Configuration for FileX to access MX25LM51245G on the B-U585I-IOT02A Development Kit

[SLimi.1]

Created an Azure RTOS project to have FileX access the MX25LM51245G NOR flash memory in the B-U585I-IOT02A discovery kit. Configured LevelX for OCTOSPI2 and MX25LM51245G as the OSPI component. Enabled DMA Channel 12 with a linear linked list. Linked OCTOSPI2 to the DMA channel with the following call in main.c: hospi2.hdma = &handle_GPDMA1_Channel12; 

The code runs until the call into the HAL_OSPI_Receive_DMA() function (stm32u5xx_hal_ospi.c). It fails on the if for p_queue which appears to be null. It there something else that needs to be configured or created in code?

[KDJEM.1 · Accepted solution]

Hello @SLimi.1 ,

I advise you to start from an available example. 

For that I recommend you to take a look to this Fx_NoR_Write_Read_File example running on B-U585I-IOT02A board. This application provides an example of Azure RTOS FileX and LevelX stacks usage on B-U585I-IOT02A board, it demonstrates how to create a Fat File system on the NOR flash using FileX alongside LevelX. The application is designed to execute file operations on the MX25LM51245G NOR flash device.

Thank you.

Kaouthar

[SLimi.1 · Accepted solution]

Thank you. The problem configuring the correct DMA channel to 0 and performing a Standard Request Mode. Then set the Request to OCTOSPI2 did the trick.