Why STM32L432KC shows "BAD STATE MACHINE IN FIRMWARE In dfu mode?

[swapnil champaneria]

stm32l432kc shows bad state machine in firmware when tries to upgrade code in dfu mode using the same code with the same file.

[Tesla DeLorean]

Not an error state that I'm familiar with, would look at .HEX and .DFU involved. ​

[Tesla DeLorean]

Try STM32 Cube Programmer it also supports USB/DFU connectivity. ​

[swapnil champaneria]

Thanks for reply

I am facing same problem even if I generated file using the upload button in  the software and try to upgrade this file in stm32l432kc again, Any suggestion to solve this issue 

[swapnil champaneria]

@Community member​  Thanks for replay, In stm32 cube program my device not detected in dfu mode 

[Amel NASRI]

Try upgrading the ST-Link firmware first.

[swapnil champaneria]

Thanks for your reply @Amel NASRI​ , 

I upgraded ST-Link's firmware, but it still shows the same error as before.

Your reply will worthier to me.

Thanks and Regards,

Swapnil

[Amel NASRI]

My proposal is for the case when STM32CubeProgrammer is used. Is your device detected after updating the ST-Link firmware?

[Tesla DeLorean]

OP Attempting to connect in USB/DFU mode, NOT as ST-LINK

[Tesla DeLorean]

Please show screen-shot with Device Manager indicating "STM32 in DFU Mode" device and Cube STM32 Programmer, with USB source selected, and not showing device.