AnsweredAssumed Answered

Startup Problem

Question asked by Jacobs.Carl.001 on Apr 5, 2012
Latest reply on May 2, 2012 by head.christopher
Hi, I need some ideas on a problem I'm experiencing.
I have an STM32F2xx based product (an automotive sensor of sorts) which has just started field testing. The electrical interface to the product is 4 wires - +V, GND, CAN+ and CAN-.
Most of the time the product starts fine (as observed by the CAN stream), but every so often the product does not appear to start. I have not yet personally observed the fault - only seen the evidence of it. There are two variations:
1) If the product starts correctly, then it does not appear to stop working at any stage.
2) If the product doesn't start, then it wont recover until the next power cycle.
I am suspicious that the STM32 is somehow entering boot loader mode on startup. I have 10K pull down resistors on Boot 0 and Boot 1. The boot loader mode does not appear to have any sort of time out, which could explain why it gets stuck.
Has anybody else experienced anything similar?
Regards,
Carl.

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