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avishorp / TM1637

Arduino library for TM1637 (LED Driver)
GNU Lesser General Public License v3.0
427 stars 218 forks source link

GPIO not doing anything. #57

Closed sadilekivan closed 5 years ago

sadilekivan commented 5 years ago

Hello, I have used your libary without a problem for quite a long time.

But just two days ago for seemingly no reason it just stopped displaying data. I am shifting 3,3v of the bluepill board to the 5v display and it has always worked. I even get a nice light up of the shifting LEDs when the pins are sending bits. They arent lighting up anymore showing me its not the fault of the display.

To get it even more confusing I happened to have a old version of my program on a different stm32. I simply plugged it in and it works. Problem is there isnt a single difference in my code.

I have checked multiple times and built new projects just to test the display but all I can guess is a problem with some update for the stm32 framework?

I feel im in a dead end here, thanks for all and any input or advice!

sadilekivan commented 5 years ago

Make sure you read the right version of a scheme if you are checking connections as my mistake got made by a combination of using a different crystal source and a obsolete scheme telling me it was okay to do so.