78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
#include "key.h"
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#include "dwt.h"
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/*********************************************************************************
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___ _ _____ _____ _ _ _____ _____ _ __
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/ _ \ | | |_ _|| ___|| \ | ||_ _|| ___|| | / /
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/ /_\ \| | | | | |__ | \| | | | | |__ | |/ /
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| _ || | | | | __| | . ` | | | | __| | \
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| | | || |_____| |_ | |___ | |\ | | | | |___ | |\ \
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\_| |_/\_____/\___/ \____/ \_| \_/ \_/ \____/ \_| \_/
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* ******************************************************************************
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* 本程序只供学习使用，未经作者许可，不得用于其它任何用途
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* ALIENTEK W601开发板
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* KEY驱动代码
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* 正点原子@ALIENTEK
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* 技术论坛:www.openedv.com
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* 创建日期:2019/7/10
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* 版本：V1.0
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* 版权所有，盗版必究。
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* Copyright(C) 广州市星翼电子科技有限公司 2019-2029
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* All rights reserved
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* ******************************************************************************
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* 初始版本
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* ******************************************************************************/
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/**
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* @brief 按键初始化函数
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*
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* @param void
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*
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* @return void
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*/
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void KEY_Init(void)
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{
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/*
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KEY0 - PA7
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KEY1 - PA6
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KEY_UP - PA8 高电平有效
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*/
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tls_gpio_cfg(WM_IO_PA_06, WM_GPIO_DIR_INPUT, WM_GPIO_ATTR_FLOATING);
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tls_gpio_cfg(WM_IO_PA_07, WM_GPIO_DIR_INPUT, WM_GPIO_ATTR_FLOATING);
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tls_gpio_cfg(WM_IO_PA_08, WM_GPIO_DIR_INPUT, WM_GPIO_ATTR_PULLLOW);
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}
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/**
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* @brief 按键处理函数
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*
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* @remark 注意此函数有响应优先级,KEY0>KEY1>KEY2>KEY_UP!!
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*
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* @param mode 0:不支持连续按,1:支持连续按
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*
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* @return u8 返回按键值
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* 0:没有任何按键按下,1:KEY0按下,2:KEY1按下,3:KEY2按下,4:KEY_UP按下
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*/
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u8 KEY_Scan(u8 mode)
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{
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static u8 key_up = 1; //按键松开标志
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if(mode == 1)key_up = 1; //支持连按
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if(key_up && (KEY0 == 0 || KEY1 == 0 || KEY_UP == 1))
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{
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delay_ms(10);
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key_up = 0;
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if(KEY0 == 0) return KEY0_PRES;
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else if(KEY1 == 0) return KEY1_PRES;
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else if(KEY_UP == 1) return WKUP_PRES;
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}
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else if(KEY0 == 1 && KEY1 == 1 && KEY_UP == 0)key_up = 1;
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return 0; //无按键按下
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}
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