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[dev][gpio_keypad] make the init function wait for one full scan

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This commit is contained in:
Dima Zavin
2009-01-26 16:35:06 -08:00
committed by Brian Swetland
parent 214cc64027
commit d6455cda90
1 changed files with 7 additions and 0 deletions
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7
dev/keys/gpio_keypad.c
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@@ -36,11 +36,13 @@
#include <dev/keys.h>
#include <dev/gpio.h>
#include <dev/gpio_keypad.h>
#include <kernel/event.h>
#include <kernel/timer.h>
struct gpio_kp {
struct gpio_keypad_info *keypad_info;
struct timer timer;
event_t full_scan;
int current_output;
unsigned int some_keys_pressed:2;
unsigned long keys_pressed[0];
@@ -113,6 +115,7 @@ gpio_keypad_timer_func(struct timer *timer, time_t now, void *arg)
}
if (/*!kp->use_irq*/ 1 || kp->some_keys_pressed) {
event_signal(&kp->full_scan, false);
timer_set_oneshot(timer, kpinfo->poll_time,
gpio_keypad_timer_func, NULL);
goto done;
@@ -166,6 +169,10 @@ void gpio_keypad_init(struct gpio_keypad_info *kpinfo)
keypad->current_output = kpinfo->noutputs;
event_init(&keypad->full_scan, false, EVENT_FLAG_AUTOUNSIGNAL);
timer_initialize(&keypad->timer);
timer_set_oneshot(&keypad->timer, 0, gpio_keypad_timer_func, NULL);
/* wait for the keypad to complete one full scan */
event_wait(&keypad->full_scan);
}