Nucleo-H7S3l8 : using XSPI1 to communicate with FPGA as slave

[Samiksha]

Hello,

I am using Nucleo-H7S3l8 board XSPI1 interface an using FPGA as slave. Is the XSPI drives only configured to work well with memories? Can other device be used as slave? I want to test FPGA by interfacing it to STM board. I am able to send the instruction that I intend to but when I configure some address then it seems to be not going correctly. Not sure what's happening but not able to capture on scope when address is configured. It seems to hang. What can be the issue? Some driver issue or missing configuration?

Please suggest what might have gone wrong.

Thanks,

Samiksha

[KDJEM.1]

Hello @Samiksha ;

 

The XSPI interface can be communicated with any device has command format and order shared in their datasheet aligned with the command format and order mentioned in the STM32 reference. I recommend you to look at Overall FAQs for QUADSPI/OCTOSPI/HSPI/XSPI. This article provides some external memories tips and tricks, frequently asked questions, and a list for useful link resources.

> when I configure some address then it seems to be not going correctly.

Could you please give more detail about the issue. What have you got and what are you expecting?

May this Solved: OCTOSPI interface for communication with a FPGA - STMicroelectronics Community can help you.

 

Thank you.

Kaouthar

[Samiksha]

Hello @KDJEM.1 ,

I have connected a scope to XSPI lines. While Mem read, if I use 24 bit address it works and with 32 bit address cmd, I dont read back any data also scope didn't capture anything. Also, for mem write cmd, data that I configure in array doesn't seem to be going out instead of data in array 0x00 is going out and 1 or 2 other bytes. The behaviour is not consistent.
When interfacing with FPGA, neither 24 or 32 bit address gets captured. 

What memory mode would to suggest to configure while interfacing with memory. 

I am still figuring out the correct frame to send to FPGA.

Can you also comment, if SPI frame is not valid for the slave then driver is expected to send it out correctly or what?

Thanks,

Samiksha

[KDJEM.1]

Hello @Samiksha;

 

Thank you for updating post.

For more investigation, I recommend you to share your project?

I advise you to take a look at AN5050 and RM0477 section XSPI. These resources explain the different XSPI mode.

 

Thank you.

Kaouthar

[Samiksha]

Hi @KDJEM.1 ,

I am already referring to the documents that you have shared.

Attaching my project zip.

Thanks,

Samiksha