SDCard pulsating LED error code

(3 posts) (2 voices)

SevenW
Member

Once in a while my Olimexino-STM32 does not properly boot after downloading a sketch. The green LED shows a pulsating flash about once per second. What does this error code mean, and what library generates this LED control?

I searched SDFatLib, and spi files, but I cannot find any LED control in there.

The LED gradually increases in intensity, and then decreases, like a dimmer sketch.

It happens in a logger application, and it is related to the SDCard. When I take out the SDCard, reinsert it and press reset, it boots normally. When in this error state, no connection can be made with SerialUSB.

Any thoughts?

regards,
SevenW

Posted 2 years ago #
ventosus
Member

Sounds like you're experiencing the LED throb. That's how libmaple tells you that a serious error happened, e.g. your sketch crashed by an invalid memory access, unsucessful ASSERT, ...

The code you're looking for most probably is this one:
https://github.com/leaflabs/libmaple/blob/master/libmaple/util.c

Posted 2 years ago #
SevenW
Member

Ha, the last chance exception handler. Nice. I read that I can connect at 9600 to USART2 to read the debug information. So this should give enough to analyze the problem. Thanks for the pointer ventosus.

Posted 2 years ago #

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