106 lines
3.6 KiB
C
106 lines
3.6 KiB
C
#include <debounce.h>
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void Debounce_Init(Debounce_t* self){
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self->state = kButtonState_IDLE;
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self->debounce_cnt = 0;
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self->long_press_cnt = 0;
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self->double_click_cnt = 0;
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self->is_pressed = 0;
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self->last_pressed = 0;
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}
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ButtonEvent_t Debounce_Handle(Debounce_t* self, uint8_t cur_state){
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ButtonEvent_t event = kButtonEvent_NONE;
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self->is_pressed = cur_state;
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switch (self->state) {
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case kButtonState_IDLE:{
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if(cur_state == 1){
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self->state = kButtonState_DEBOUNCE;
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self->debounce_cnt = 0;
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}
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break;
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}
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case kButtonState_DEBOUNCE:{
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if(cur_state==1){
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self->debounce_cnt++;
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if(self->debounce_cnt >= DEBOUNCE_TICKS){
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self->state = kButtonState_PRESS;
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self->debounce_cnt = 0;
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event = kButtonEvent_PRESS; /* 触发下按事件 */
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}
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}else{
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self->state = kButtonState_IDLE;
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}
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break;
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}
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case kButtonState_PRESS:{
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if(cur_state==1){
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self->long_press_cnt++;
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if(self->long_press_cnt >= DEBOUNCE_LONG_TICKS){
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self->state = kButtonState_LONG_PRESS;
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event = kButtonEvent_LONG_PRESS;
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}
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}else{
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// 第一击释放，进入释放消抖，防止触摸屏抖动误判
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self->state = kButtonState_RELEASE_DEBOUNCE;
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self->debounce_cnt = 0;
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self->long_press_cnt = 0;
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}
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break;
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}
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case kButtonState_LONG_PRESS:{
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if(cur_state==0){
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self->state = kButtonState_IDLE;
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self->long_press_cnt = 0;
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event = kButtonEvent_RELEASE;
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}
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break;
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}
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case kButtonState_WAIT_DOUBLE:{
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if(cur_state==1){ /* 在规定时间内再次按下，判定为双击 */
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self->state = kButtonState_DOUBLE_DEBOUNCE; /* 去除第二次抖动 */
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self->debounce_cnt = 0;
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}else{
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self->double_click_cnt++;
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if(self->double_click_cnt>=DEBOUNCE_DOUBLE_TICKS){ // 超时未按下，判定为普通的独立单击
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self->state = kButtonState_LONG_PRESS;
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event = kButtonEvent_CLICK;
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self->double_click_cnt = 0;
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}
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}
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break;
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}
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case kButtonState_DOUBLE_DEBOUNCE:{
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if(cur_state==1){
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self->debounce_cnt++;
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if(self->debounce_cnt >= DEBOUNCE_TICKS){
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self->state = kButtonState_LONG_PRESS; /* 等待释放 */
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self->debounce_cnt = 0;
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event = kButtonEvent_DOUBLE_CLICK; /* 确认双击 */
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}
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}else{
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self->state = kButtonState_IDLE;
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}
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break;
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}
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case kButtonState_RELEASE_DEBOUNCE:{
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if(cur_state==0){
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self->debounce_cnt++;
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if(self->debounce_cnt >= DEBOUNCE_TICKS){
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// 确认释放，开始计时等待第二击
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self->state = kButtonState_WAIT_DOUBLE;
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self->double_click_cnt = 0;
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}
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}else{
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self->state = kButtonState_PRESS; // 抖动,返回按下状态
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}
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break;
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}
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default: break;
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}
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self->last_pressed = cur_state;
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return event;
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} |