zoe1337 / morserror

low-footprint stateful runtime morse encoder designed for microcontrollers

morsError

low-footprint stateful runtime morse encoder designed for microcontrollers

why

If you have an error LED on your device, why can't it tell you what is wrong?

how

Include morse.h in your code.

You must edit two functions in morse.c: errorledon() and errorledoff()

In your main loop (or from a timer interrupt) you must call updateMorsE() at preferably regular intervals. A good period is somewhere between 200ms - 1s. If there is too much jitter, the code will be unreadable.

To set a code, call setMorsError(char c) where c is an ASCII character. Right now [A-Za-z0-9] is supported. Anything else will set the encoder into off state.

When you periodically call updateMorsE(), the function will return 1 at the end of each character transmitted. This is the time you might want to change the character to a different one! I included an example on how to send a text string in main.c

I wrote this for an MSP430 but it should be easy to run it on any other microcontroller. You only need to provide the errorledon() and errorledoff() functions.

decoding

I found an android app which can more or less decode morse with the camera, it's called Morse Code Agent - let me know if you find any open-source alternative.

my favorite part

is the binary look-up table. the MSP compiler neatly packed the bytes, so the whole thing is very compact and still quite fast.