mirror of
https://gitee.com/moluo-tech/AT-Command
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74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/******************************************************************************
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* @brief 独立按键管理
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*
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* Copyright (c) 2017~2020, <morro_luo@163.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2017-08-10 roger.luo Initial version
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******************************************************************************/
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#include "key.h"
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#include <stddef.h>
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static key_t *keyhead = NULL; /*按键链表头结点*/
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/*******************************************************************************
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* @brief 创建一个按键
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* @param[in] key - 按键管理器
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* @param[in] readkey - 按键触发测试函数指针
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* @param[in] event - 按键事件处理函数指针
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* @return true - 创建失败, false - 创建成功
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******************************************************************************/
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bool key_create(key_t *key, int (*readkey)(void),
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void (*event)(int type, unsigned int duration))
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{
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key_t *keytail = keyhead;
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if (key == NULL || readkey == NULL || event == NULL)
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return 0;
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key->event = event;
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key->readkey = readkey;
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key->next = NULL;
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if (keyhead == NULL) {
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keyhead = key;
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return 1;
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}
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while (keytail->next != NULL) /*转至链尾*/
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keytail = keytail->next;
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keytail->next = key;
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return 1;
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}
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/*******************************************************************************
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* @brief 按键扫描处理
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* @return none
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******************************************************************************/
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void key_scan_process(void)
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{
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key_t *k;
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for (k = keyhead; k != NULL; k = k->next) {
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if (k->readkey()) {
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if (k->tick) {
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if (is_timeout(k->tick, LONG_PRESS_TIME)) /*长按判断 */
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k->event(KEY_LONG_DOWN, get_tick() - k->tick);
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} else {
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k->tick = get_tick(); /*记录首次按下时间*/
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}
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} else if (k->tick) {
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if (is_timeout(k->tick, LONG_PRESS_TIME)) { /*长按释放 */
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k->event(KEY_LONG_UP, get_tick() - k->tick);
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}
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/*短按释放操作 ---------------------------------------------------*/
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if (is_timeout(k->tick, KEY_DEBOUNCE_TIME) &&
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!is_timeout(k->tick, LONG_PRESS_TIME)) {
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k->event(KEY_PRESS, get_tick() - k->tick);
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}
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k->tick = 0;
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}
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}
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}
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