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Wangyao20200202/MultiButton

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multi_button.c 4.67 KB
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方舟 提交于 2019-01-08 12:54 . 更新 multi_button.c
#include "multi_button.h"
#define EVENT_CB(ev) if((handle->event)&ev)handle->cb(handle,handle->event)
//button handle list head.
static struct Button* head_handle = NULL;
/**
* @brief Initializes the button struct handle.
* @retval None
*/
void button_init(void)
{
head_handle = NULL;
}
/**
* @brief Button driver core function, driver state machine.
* @param handle: the button handle strcut.
* @param pin_level: the button status 0:unpress 1:pressed.
* @param cb: the button press call function.
* @param event: the button event trigger mask.
* @retval None
*/
void button_attach(struct Button* handle, uint8_t(*pin_level)(), BtnCallback cb, PressEvent event)
{
memset(handle, 0, sizeof(struct Button));
handle->event = (uint8_t)BTN_UNPRESS;
handle->hal_button_Level = pin_level;
handle->button_level = handle->hal_button_Level();
handle->cb = cb;
/* start the button */
button_start( handle );
}
/**
* @brief Inquire the button event happen.
* @param handle: the button handle strcut.
* @retval button event.
*/
PressEvent get_button_event(struct Button* handle)
{
return (PressEvent)(handle->event);
}
/**
* @brief Button driver core function, driver state machine.
* @param handle: the button handle strcut.
* @retval None
*/
void button_handler(struct Button* handle)
{
uint8_t read_gpio_level = handle->hal_button_Level();
//ticks counter working..
if((handle->state) > 0) handle->ticks++;
/*------------button debounce handle---------------*/
if(read_gpio_level != handle->button_level) { //not equal to prev one
//continue read 3 times same new level change
if(++(handle->debounce_cnt) >= DEBOUNCE_TICKS) {
handle->button_level = read_gpio_level;
handle->debounce_cnt = 0;
}
} else { //leved not change ,counter reset.
handle->debounce_cnt = 0;
}
handle->event = read_gpio_level;
/*-----------------State machine-------------------*/
switch (handle->state) {
case 0:
if(handle->button_level == BTN_PRESSED) { //start press down
handle->event |= (uint8_t)PRESS_DOWN;
EVENT_CB(PRESS_DOWN);
handle->ticks = 0;
handle->repeat = 1;
handle->state = 1;
} else {
handle->event |= (uint8_t)BTN_UNPRESS;
}
break;
case 1:
if(handle->button_level != BTN_PRESSED) { //released press up
handle->event |= (uint8_t)PRESS_UP;
EVENT_CB(PRESS_UP);
handle->ticks = 0;
handle->state = 2;
} else if(handle->ticks > LONG_TICKS) {
handle->event |= (uint8_t)LONG_RRESS_START;
EVENT_CB(LONG_RRESS_START);
handle->state = 5;
}
break;
case 2:
if(handle->button_level == BTN_PRESSED) { //press down again
handle->event |= (uint8_t)PRESS_DOWN;
EVENT_CB(PRESS_DOWN);
handle->repeat++;
if(handle->repeat == 2) {
EVENT_CB(DOUBLE_CLICK); // repeat hit
}
EVENT_CB(PRESS_REPEAT); // repeat hit
handle->ticks = 0;
handle->state = 3;
} else if(handle->ticks > SHORT_TICKS) { //released timeout
if(handle->repeat == 1) {
handle->event |= (uint8_t)SINGLE_CLICK;
EVENT_CB(SINGLE_CLICK);
} else if(handle->repeat == 2) {
handle->event |= (uint8_t)DOUBLE_CLICK;
}
handle->state = 0;
}
break;
case 3:
if(handle->button_level != BTN_PRESSED) { //released press up
handle->event |= (uint8_t)PRESS_UP;
EVENT_CB(PRESS_UP);
if(handle->ticks < SHORT_TICKS) {
handle->ticks = 0;
handle->state = 2; //repeat press
} else {
handle->state = 0;
}
}
break;
case 5:
if(handle->button_level == BTN_PRESSED) {
//continue hold trigger
handle->event |= (uint8_t)LONG_PRESS_HOLD;
EVENT_CB(LONG_PRESS_HOLD);
} else { //releasd
handle->event |= (uint8_t)PRESS_UP;
EVENT_CB(PRESS_UP);
handle->state = 0; //reset
}
break;
}
}
/**
* @brief Start the button work, add the handle into work list.
* @param handle: target handle strcut.
* @retval 0: succeed. -1: already exist.
*/
int button_start(struct Button* handle)
{
struct Button* target = head_handle;
while(target) {
if(target == handle) return -1; //already exist.
target = target->next;
}
handle->next = head_handle;
head_handle = handle;
return 0;
}
/**
* @brief Stop the button work, remove the handle off work list.
* @param handle: target handle strcut.
* @retval None
*/
void button_stop(struct Button* handle)
{
struct Button** curr;
for(curr = &head_handle; *curr; ) {
struct Button* entry = *curr;
if (entry == handle) {
*curr = entry->next;
// free(entry);
} else
curr = &entry->next;
}
}
/**
* @brief background ticks, timer repeat invoking interval 5ms.
* @param None.
* @retval None
*/
void button_ticks()
{
struct Button* target;
for(target=head_handle; target; target=target->next) {
button_handler(target);
}
}
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MultiButton
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