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[cpu/cc430]

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* fixed debouncing for gpioint
This commit is contained in:
Oliver Hahm 2010-12-16 18:09:40 +01:00
parent 08295b04ca
commit b416fef56b
1 changed files with 18 additions and 8 deletions
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26
cpu/cc430/cc430-gpioint.c
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@ -44,7 +44,7 @@ and the mailinglist (subscription via web site)
#define BITMASK_SIZE (8)
/** debouncing port interrupts */
#define DEBOUNCE_TIMEOUT (150)
#define DEBOUNCE_TIMEOUT (250)
/** interrupt callbacks */
fp_irqcb cb[INT_PORTS][BITMASK_SIZE];
@ -146,33 +146,41 @@ bool gpioint_set(int port, uint32_t bitmask, int flags, fp_irqcb callback) {
}
interrupt (PORT1_VECTOR) __attribute__ ((naked)) port1_isr(void) {
uint8_t int_enable, ifg_num;
uint8_t int_enable, ifg_num, p1ifg;
uint16_t p1iv;
uint16_t diff;
__enter_isr();
/* Debounce
* Disable PORT1 IRQ
*/
p1ifg = P1IFG;
p1iv = P1IV;
int_enable = P1IE;
P1IE = 0x00;
ifg_num = (p1iv >> 1) - 1;
/* check interrupt source */
if (debounce_flags[0] & P1IFG) {
if (debounce_flags[0] & p1ifg) {
/* check if bouncing */
if ((hwtimer_now() - debounce_time[0][ifg_num]) > DEBOUNCE_TIMEOUT) {
diff = hwtimer_now() - debounce_time[0][ifg_num];
if (diff > DEBOUNCE_TIMEOUT) {
debounce_time[0][ifg_num] = hwtimer_now();
cb[0][ifg_num]();
if (cb[0][ifg_num] != NULL) {
cb[0][ifg_num]();
}
}
else {
/* TODO: check for long duration irq */
asm volatile (" nop ");
}
}
else {
cb[0][ifg_num]();
if (cb[0][ifg_num] != NULL) {
cb[0][ifg_num]();
}
}
P1IFG = 0x00;
P1IE = int_enable;
__exit_isr();
@ -211,7 +219,9 @@ interrupt (PORT2_VECTOR) __attribute__ ((naked)) port2_isr(void) {
}
}
else {
cb[1][ifg_num]();
if (cb[1][ifg_num] != NULL) {
cb[1][ifg_num]();
}
}
P2IFG = 0x00;