Enable setting the clock time via keyboard

debounce.c

@@ -0,0 +1,43 @@
+#include <avr/io.h>
+#include "debounce.h"
+#include "ptimer.h"
+
+void SuperDebounce(uint8_t * key_state, volatile uint8_t *KPIN,
+		uint8_t key_mask, uint16_t rep_time, uint16_t rep_wait,
+		void (*push_proc)(void), void (*rep_proc)(void) ) {
+
+	enum {idle, debounce, go_rep, wait_rep, rep};
+
+	if(!rep_time) rep_time=20;
+	if(!rep_wait) rep_wait=150;
+
+	uint8_t key_press = !(*KPIN & key_mask);
+
+	if( key_press && !*key_state ) {
+		*key_state = debounce;
+		timers[TIM_DEBOUNCE] = 15;
+	} else
+	if( *key_state  ) {
+
+		if( key_press && debounce==*key_state && !timers[TIM_DEBOUNCE] ) {
+			*key_state = 2;
+			timers[TIM_DEBOUNCE]=5;
+		} else
+		if( !key_press && *key_state>1 && *key_state<4 ) {
+			if(push_proc) push_proc();						/* KEY_UP */
+			*key_state=idle;
+		} else
+		if( key_press && go_rep==*key_state && !timers[TIM_DEBOUNCE] ) {
+			*key_state = wait_rep;
+			timers[TIM_DEBOUNCE]=rep_wait;
+		} else
+		if( key_press && wait_rep==*key_state && !timers[TIM_DEBOUNCE] ) {
+			*key_state = rep;
+		} else
+		if( key_press && rep==*key_state && !timers[TIM_DEBOUNCE] ) {
+			timers[TIM_DEBOUNCE] = rep_time;
+			if(rep_proc) rep_proc();						/* KEY_REP */
+		}
+	}
+	if( *key_state>=3 && !key_press ) *key_state = idle;
+}