I am trying to write a code for QE128 which i will explain
i have 2 keys, A & B
On pressing A , i xmit char '1' on SCI . I don't release A and until this time ,'1' is xmitted continuosly on Tx and an LED glows during this time.While i am pressing down A , if i press B w/o releasing both keys, then char '2' is xmitted and another LED glows.Upon releasing both keys,the process is terminated (LED's off and xmit is off)
For this i wrote a code invoking KBI interrupts.But i found out that after pressing B ,the A routine is serviced as well so as to get 212121... on my terminal.
Can anyone provide a valid approach of doing this?
Awaiting precious replies.
Thanks and regards