Paul Staron

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9 years, 6 months ago.

UART's not working?

I'm, having UART problems (again). A very simple initialise and print a line of text to a 4DSystems serial Oled display works on all my platforms but not on the K22F board, I have tried all the UART pin configurations available as per PeripheralPins.c, but no initialisation. Tried several displays as well.

Any ideas?

Question relating to:

Last updated: 30 Jun 2020
The FRDM-K22F is an ultra-low-cost development platform for Kinetis K Series K2x (K22F) MCUs built on ARM® Cortex™-M4 processor. Features include easy access to MCU I/O, battery-ready, low-power operation, a …

1 Answer

Erik -
9 years, 6 months ago.

I know of the K22F for some reason not sending the first char, will also add it to my todo list to figure out why not :P. Try adding a single char dummy write on the serial connection in the meantime.

Despite not actually having a clue about the exact cause, I submited pull request which should fix it.

posted by Erik - 09 Nov 2014

Okay Erik, I'll give it a try as soon as Mbed-SRC import is working properly again and reply here (may have to wait for the update though).

Edit... It's updated and whatever you did works, furthermore serial runs at 256k, good result.

posted by Paul Staron 11 Nov 2014