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Pierre95's avatar
Pierre95
Icon for New Contributor rankNew Contributor
3 years ago

Troubles while configuring Flex 10K20TC144 in PS mode from microcontroller

Hello, I am trying to configure Flex10K20 from a PIC MCU using 1 bit passive serial mode. The .rbf configuration file I get from quartus is exactly 28941 bytes in size. It is programmed into PI...
WZ2's avatar
WZ2
Icon for Frequent Contributor rankFrequent Contributor
2 years ago

Hi there,

Last time, I thought the "fpga" means your master device~

Anyway, I see the scenes is that you try to use AS configuration for "FPGA"'s config. And the signal's state show that the FPGA enter in config mode, however the configuration is failed and it cannot enter in user mode.

In my opinion, the greatest probability of this error is caused by the config file. Please make sure again the configuration file is right, like the setting of the flash or the little endian. In the other hands, do you have the configuration file which was succeed before and test the device has no problem~

Have a nice day~

Best regards,


  • Pierre95's avatar
    Pierre95
    Icon for New Contributor rankNew Contributor
    2 years ago

    Hello,

    No I use PS (not AS) to configure the Flex , as the Flex gets configured from a microcontroller which drives the nCONFIG low and high after 5µs to trigger the configuration process.

    DCLK and DATA0 are fed from the MCU. Now I am able to see CONF_DONE go high for 4µs (after all config file has been sent), then low again which migh signify an error in the configuration data?

    I am not familiar with the behavior of CONF_DONE. Is there a test performed while it is already high which if wrong makes it go low again?

    I can try to swap bytes to see if endianess could have some impact.

    Wish you a nice day too,

    Best regards