PB8/9 interfering with each other when using timer/AF

[jordanjohnp]

Posted on October 16, 2014 at 17:17

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[Tesla DeLorean]

Posted on October 16, 2014 at 19:06

I'm not aware of a GPIO/AF conflict on F1 devices, you could check the errata, which as I recall has a couple of peripheral/peripheral conflicts on the some pins in AF mode. What other peripherals have potential claim to PB8 and PB9?

Other than that look for mundane causes related to solder/circuitry attached to the pins externally, paths there, and if you can replicate behaviour on a VL-Discovery board.

[jordanjohnp]

Posted on October 17, 2014 at 16:55

Thank you for your comments. As you said, the problem was external hardware circuitry.