88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
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#include <avr/interrupt.h>
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#include "button.h"
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#include "timers.h"
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#include "hal.h"
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#include <util/delay.h>
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#include "pm.h" // TODO: FOR DEBUGGING ONLY
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volatile enum BUTTON_EVENTS button_event_status = NONE;
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// User button interrupt
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ISR(INT1_vect)
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{
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_delay_ms(50);
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if (HAL_ASSERTED_N(BUTTON_N)) { // Button down event
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switch (button_event_status) {
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case NONE: // Start processing button from NONE,
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case EV_BOOT: // or drop boot event if not polled for,
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case EV_PRESS: // or drop current keypress to prevent unhandled keypresses from blocking other would-be-handled keypresses
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case EV_DOUBLEPRESS:
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case EV_LONGPRESS:
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case EV_DOUBLELONGPRESS:
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button_event_status = WAIT_FOR_RELEASE_1;
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timer_set(TIMER_BUTTON, timer_ms(500));
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break;
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case WAIT_FOR_SECOND:
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button_event_status = WAIT_FOR_RELEASE_2;
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timer_set(TIMER_BUTTON, timer_ms(500));
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break;
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default:
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break;
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}
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} else { // Button up event
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switch (button_event_status) {
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case WAIT_FOR_RELEASE_1:
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button_event_status = WAIT_FOR_SECOND;
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break;
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case WAIT_FOR_RELEASE_2:
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button_event_status = EV_DOUBLEPRESS;
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break;
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default:
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break;
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}
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}
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return;
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}
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void button_init()
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{
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HAL_INIT(BUTTON_N, INPUT, ON); // Pull-up for user button
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button_event_status = EV_BOOT;
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MCUCR = (1 << ISC10); // Any-edge interrupt
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GICR = (1 << INT1); // Turn on button interrupt
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}
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void button_systick_cb()
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{
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if (button_event_status != 0) { // TODO: we should not enter on pending EV?
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if (timer_expired(TIMER_BUTTON)) {
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switch (button_event_status) {
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case WAIT_FOR_RELEASE_1:
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button_event_status = EV_LONGPRESS;
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break;
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case WAIT_FOR_RELEASE_2:
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button_event_status = EV_DOUBLELONGPRESS;
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pm_reset(); // TODO: For debugging purposes only
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break;
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case WAIT_FOR_SECOND:
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button_event_status = EV_PRESS;
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break;
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default:
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break;
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}
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}
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}
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}
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int button_event(enum BUTTON_EVENTS ev)
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{
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if (button_event_status == ev) {
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button_event_status = NONE; // Mark as handled
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return 1;
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}
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return 0;
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}
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