Discovery Board, unable to get PC14 to do anythng??

[phiatt]

Hello Group,

My name is Philip. I had purchased a Frankenstein kit a while back, and finally got around to assembling it. Typically, in a project such as this I try to test everything to ensure no issues. For the life of me I cannot get PC14, Low side driver #1 to do anything.

Just in case you are wondering, I know about the jumper and have shorted it to the output pad. And, I have a scope attached directly to the Discovery board pin PC14.


Any help would be appreciated, Thanks

[AndreyB]

Welcome to the forum!

Can you detach Frankenstein and test discovery PC14 output without Frankenstein? Scope or even just an LED.

[phiatt]

Hello Russian,


Thanks for the reply, I am able to disconnect the Discovery board and have tested it off of the Frankenstein. Still no luck. The others seem fine, is it possibly a bad output?

[phiatt]

Just an update, PC14 and PC15 is not working.

Are these outputs disabled in the firmware?

[AndreyB]

There is that https://docs.google.com/spreadsheets/d/1pnU3Migcc7JEezvpVt3TcVCbuE5dIXXwrYFGZI97GNM document which is me testing which GPIO is affected by discovery accesesories. PC14 and PC15 listed as green. Should work - I am not aware of anything special in the firmware about these pins.

[phiatt]

I have written a simple test program, that only toggles PC14 and PC15, they are DOA.

[puff]

have you checked those pins directly on the disco board? Have you checked the neighbouring pins using the same test code?

[kb1gtt]

Have you tried another Discovery? Did your test program enable the internal pull up resistors?