SREC Bootloader Fails to Load Target Application from SPI Flash

[Johnnie White]

Hi,

I'm looking for next steps.

I followed a tutorial on How To Store Your SDK Project in SPI Flash and the boot loader starts but never launches the target application.

https://reference.digilentinc.com/learn/programmable-logic/tutorials/htsspisf/start

I've traced it down to the file xilisf.c where the call to XIsf_GetDeviceInfo() never returns.  It appears to get stuck on XIsf_Transfer() and never returns.

Here's a snip-it of code:

    /*
     * Prepare the Write Buffer.
     */
    InstancePtr->WriteBufPtr[BYTE1] = XISF_CMD_ISFINFO_READ;
    InstancePtr->WriteBufPtr[BYTE2] = XISF_DUMMYBYTE;
    InstancePtr->WriteBufPtr[BYTE3] = XISF_DUMMYBYTE;
    InstancePtr->WriteBufPtr[BYTE4] = XISF_DUMMYBYTE;
    InstancePtr->WriteBufPtr[BYTE5] = XISF_DUMMYBYTE;

    /*

     * Initiate the Transfer.
     */
    Status = XIsf_Transfer(InstancePtr, InstancePtr->WriteBufPtr,
                ReadPtr, XISF_INFO_READ_BYTES);

[Johnnie White]

I have since figured out the issue.  I needed to disable XIP Mode in the AXI Quad SPI flash block.

[jpeyron]

Hi @Johnnie White,

Welcome to the Digilent Forums!

Glad to hear you were able to figure out the issue.  Thank you for sharing that disabling the XIP Mode was the fix for this situation.

best regards,

Jon