I want to emulate key press of another embedded system which is having maximum of 64 keys. The other board is running on a micro controller and its having a matrix key board [configured as row (i/p) and columns(o/p)] i am looking for a solution to press these keys one by one or, multiple keys at the same time.
I thought i can connect 8 rows to 8 GPIO lines in RPI and the other 8 columns to other 8 GPIO lines of RPi. Then i will have a key table where i will map for each and every key what should be the GPIO lines to be shorted.But then after reading some of the post i think i am not doing it right and may damage my GPIO lines.
I request your help in how can i emulate the key presses using the GPIO lines in Rpi