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Fixes bug where the key init routine could be stuck while booting due to uncleared IFG flags. #69

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Travis Goodspeed 2018-01-31 14:55:47 -05:00
parent 2543118df3
commit 200f861bdb
1 changed files with 14 additions and 7 deletions
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19
firmware/keypad.c
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@ -14,6 +14,9 @@ void key_init(){
together by rows and columns, which requires active scanning for
a read but can allow for an initial wakeup on an interrupt. */
//Disable interrupts first.
P2IE=0;
/* Columns 2.2, 2.1, 2.0, and 1.7 are set to output mode pulled
high, so that any low row indicates a button press. */
@ -152,12 +155,16 @@ void __attribute__ ((interrupt(PORT2_VECTOR))) PORT2_ISR(void){
char newchar=key_chr(key_scan());
//Bail quickly when the key is the same.
if(lastchar==newchar) return;
lastchar=newchar;
app_cleartimer(); //Clear the idle timer.
if(lastchar!=newchar){
lastchar=newchar;
app_cleartimer(); //Clear the idle timer.
printf("PORT2 fired, got character 0x%02x.\n",
newchar);
app_keypress(newchar);
printf(" got character 0x%02x.\n",
newchar);
app_keypress(newchar);
}else{
//printf(".");
}
P2IFG=0;
}