[SOLVED] ERROR: Failed to auto-detect SPI Flash.

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  • [SOLVED] ERROR: Failed to auto-detect SPI Flash.

    I'm trying to connect j-flash spi with my spi nor flash. I'm getting the following error.

    Connecting to SPI Flash...
    - VTarget = 3.277V
    - Read SPI Flash Id = 0xFF FF FF
    - ERROR: Failed to auto-detect SPI Flash.
    - Failed to auto-detect SPI Flash.

    I used logic analyzer to see what's going on and looks like the j flash is sending 0x9f command but the spi is not responding to it.

  • So what exactly is the question?
    If the SPI flash is not responding, there is either a wiring issue or other setup issue…

    But your screenshot does not really show a complete sequence.
    There should be 8-bit = 0x9F on MOSI, followed by 8-bit 0xFF/0x00.
    When there is the FF on MOSI, the MISO should indicate the ID of the flash.
    However, in your screenshot I only see the 8-bit 0x9F transmission and that one is not expected to show anything useful on MISO…
    There is no activity on the clock line after these 8-bit, so I cannot really say if the flash is unresponsive or not…


    BR
    Alex
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