DFU error: bad state machine in firmware

Posted on May 18, 2018 at 14:17

Hello Everyone,

I am have a problem using Dfuse (v3.0.5) with my STM32L432KC.

I have a USB CDC class, not using a composite CDC-DFU.

Performing the DFU mode through the boot pin/bit.

During upgrade I got the following error:

After several times (may differ), I can do the upgrade.

Has someone already solved this problem or have any advise?

#dfu #bad-state-machine

This topic has been closed for replies.

Guru

Posted on May 18, 2018 at 14:29

Does STM32L432KC have external clock source?

Check internal frequency via MCO pin PA8

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Associate

Posted on May 18, 2018 at 14:37

I am not using an externel clock.

HSI48 for USB

HSI:16 -> PLL to get 80MHz for the rest

Associate

Posted on June 22, 2018 at 09:17

I add a sleep time of 50ms 'sleep(50)' in case STATE_DFU_DOWNLOAD_BUSY in RunThread() function inside the downloadthread.cpp file

I have compiled the DFUSE v3.0.5 using the source giving by ST with visual Studio 2017.

Now it's working.

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