功能：實現(xiàn)按鍵 長按 短按 連發(fā) 雙擊 處理

平臺：GD32

用到的外設(shè)：GPIO、定時器

作者：霍宏鵬

交流：1045338804@qq.com

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/******************************************************************************* file : platform_key.h author : huohongpeng date : 2017-03-02 description : advance application for key, base on gd gpio lib *******************************************************************************/ #ifndef __PLATFORM_KEY_H__ #define __PLATFORM_KEY_H__#define KEY_EVENT_NULL 0x0000 #define KEY_EVENT_DOWN 0x0001 #define KEY_EVENT_UP_SHORT 0x0002 #define KEY_EVENT_UP_LONG 0x0003 #define KEY_EVENT_UP_DOUBLE 0x0004 #define KEY_EVENT_SHORT 0x0005 #define KEY_EVENT_LONG 0x0006 #define KEY_EVENT_DOUBLE 0x0007/******************************************************************************User Interface [START] *******************************************************************************/#define KEY0_NUM 0x0001 #define KEY1_NUM 0x0002#define KEY0_DOWN (KEY_EVENT_DOWN | KEY0_NUM<<8) #define KEY0_UP_SHORT (KEY_EVENT_UP_SHORT | KEY0_NUM<<8) #define KEY0_UP_LONG (KEY_EVENT_UP_LONG | KEY0_NUM<<8) #define KEY0_UP_DOUBLE (KEY_EVENT_UP_DOUBLE | KEY0_NUM<<8) #define KEY0_SHORT (KEY_EVENT_SHORT | KEY0_NUM<<8) #define KEY0_LONG (KEY_EVENT_LONG | KEY0_NUM<<8) #define KEY0_DOUBLE (KEY_EVENT_DOUBLE | KEY0_NUM<<8)#define KEY1_DOWN (KEY_EVENT_DOWN | KEY1_NUM<<8) #define KEY1_UP_SHORT (KEY_EVENT_UP_SHORT | KEY1_NUM<<8) #define KEY1_UP_LONG (KEY_EVENT_UP_LONG | KEY1_NUM<<8) #define KEY1_UP_DOUBLE (KEY_EVENT_UP_DOUBLE | KEY1_NUM<<8) #define KEY1_SHORT (KEY_EVENT_SHORT | KEY1_NUM<<8) #define KEY1_LONG (KEY_EVENT_LONG | KEY1_NUM<<8) #define KEY1_DOUBLE (KEY_EVENT_DOUBLE | KEY1_NUM<<8)/******************************************************************************User Interface [END] *******************************************************************************/void key_check_all_loop_1ms(void); unsigned short key_read_value(void);#endif

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/******************************************************************************* file : platform_key.c author : huohongpeng data : 2017-03-02 description : advance application for key, base on gd gpio lib *******************************************************************************/ #include "platform_key.h" #include "GD32f1x0.h"/*-------------------------------------------------------------------- | short click | | ______ ________ | | | \ / | | | | \_______________/ | | | | | | | | | |shake| < long |shake| | | |------------------------------------------------------------------- | double click | | ______ _____________ ____ | | | \ / | | \ / | | | | \_______________/ | | \_______________/ | | | | | | | < max | | | | | | |shake| < long |shake|dclick |shake| any time |shake| | | |-------------------------------------------------------------------- | long click | | ______ ________ | | | \ / | | | | \_______________________________________/ | | | | | | | | | |shake| > long click |shake| | | |--------------------------------------------------------------------*/#define KEY_STATUS_DOWN_CHECK 0x00 #define KEY_STATUS_DOWN_SHAKE 0x01 #define KEY_STATUS_DOWN_HANDLE 0x02 #define KEY_STATUS_LONG_CHECK 0x03 #define KEY_STATUS_SHORT_UP_SHAKE 0x04 #define KEY_STATUS_DOUBLE_CHECK 0x05 #define KEY_STATUS_SHORT_UP_HANDLE 0x06 #define KEY_STATUS_DOUBLE_DOWN_SHAKE 0x07 #define KEY_STATUS_DOUBLE_UP_CHECK 0x08 #define KEY_STATUS_DOUBLE_UP_SHAKE 0x09 #define KEY_STATUS_DOUBLE_UP_HANDLE 0x0a #define KEY_STATUS_LONG_HANDLE 0x0b #define KEY_STATUS_CONTINUE_CHECK 0x0c #define KEY_STATUS_LONG_UP_SHAKE 0x0d #define KEY_STATUS_LONG_UP_HANDLE 0x0e#define KEY_READ_DOWN 0x00 /* key is pressed */ #define KEY_READ_UP 0x01 /* Key isn't pressed */ #define KEY_BUF_SIZE 0x10 /* key value buffer size */static struct {unsigned short value[KEY_BUF_SIZE];unsigned char rd;unsigned char wr; }key_buf;struct key_dev {unsigned char status; /* state machine status */unsigned char num; /* number */unsigned short count_ms; /* ms counter */unsigned short long_click_ms; /* long click check min time */unsigned short shake_filter_ms; /* shake filter time */unsigned short max_dclick_ms; /* double click max interval time */unsigned short continue_send_ms; /* after long, continue send interval */unsigned char (*read_key)(void); /* key read pin status function pointer*/ };/******************************************************************************User Interface [START] *******************************************************************************/unsigned char key0_read(void) {if (GPIO_ReadInputBit(GPIOA, GPIO_PIN_0) == 0){return KEY_READ_DOWN;}else{return KEY_READ_UP;} }unsigned char key1_read(void) {if (GPIO_ReadInputBit(GPIOB, GPIO_PIN_7) == 0){return KEY_READ_DOWN;}else{return KEY_READ_UP;} }struct key_dev key_dev[] = {{KEY_STATUS_DOWN_CHECK,KEY0_NUM,0,1500,20,300,500,(unsigned char (*)(void))key0_read,},{KEY_STATUS_DOWN_CHECK,KEY1_NUM,0,2000,20,200,300,(unsigned char (*)(void))key1_read,},/*..user add other key ..*/};/******************************************************************************User Interface [END] *******************************************************************************/static void key_write_value(unsigned short key_val); static void key_status_down_check(struct key_dev *key_dev); static void key_status_down_shake(struct key_dev *key_dev); static void key_status_down_handle(struct key_dev *key_dev); static void key_status_long_check(struct key_dev *key_dev); static void key_status_short_up_shake(struct key_dev *key_dev); static void key_status_double_check(struct key_dev *key_dev); static void key_status_short_up_handle(struct key_dev *key_dev); static void key_status_double_down_shake(struct key_dev *key_dev); static void key_status_double_up_check(struct key_dev *key_dev); static void key_status_double_up_shake(struct key_dev *key_dev); static void key_status_double_up_handle(struct key_dev *key_dev); static void key_status_long_hanle(struct key_dev *key_dev); static void key_status_continue_check(struct key_dev *key_dev); static void key_status_long_up_shake(struct key_dev *key_dev); static void key_status_long_up_handle(struct key_dev *key_dev);/** description : write key vaule to buffer param : key_val - key value , (KEY_EVENT | KEY_NUMBER<<8) retval : None author : huohongpeng data : 2017-03-02 */ void key_write_value(unsigned short key_val) { key_buf.value[key_buf.wr++] = key_val;key_buf.wr %= KEY_BUF_SIZE;/*overflow handle*/if(key_buf.wr == key_buf.rd){key_buf.rd++;key_buf.rd %= KEY_BUF_SIZE;} }/** description : read key vaule from buffer param : None retval : key_val - key value , (KEY_EVENT | KEY_NUMBER<<8) author : huohongpeng data : 2017-03-02 */ unsigned short key_read_value(void) {unsigned short key_val;if(key_buf.wr == key_buf.rd){key_val = KEY_EVENT_NULL;}else{key_val = key_buf.value[key_buf.rd++];key_buf.rd %= KEY_BUF_SIZE;}return key_val; }/** description : check key whether press down param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_down_check(struct key_dev *key_dev) {unsigned char key_read;key_read = key_dev->read_key();if(key_read == KEY_READ_DOWN){key_dev->status = KEY_STATUS_DOWN_SHAKE;key_dev->count_ms = 0;} }/** description : filter shake after key pressed down param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_down_shake(struct key_dev *key_dev) {unsigned char key_read;key_dev->count_ms++;if(key_dev->count_ms < key_dev->shake_filter_ms){return;}key_read = key_dev->read_key();if(key_read == KEY_READ_DOWN){key_dev->status = KEY_STATUS_DOWN_HANDLE;}else{key_dev->status = KEY_STATUS_DOWN_CHECK;} }/** description : key press down handle after pressed down filter shake param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_down_handle(struct key_dev *key_dev) {unsigned short key_val = key_dev->num<<8 | KEY_EVENT_DOWN;key_write_value(key_val);key_dev->status = KEY_STATUS_LONG_CHECK;key_dev->count_ms = 0;}/** description : check key whether long click param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_long_check(struct key_dev *key_dev) {unsigned char key_read;key_dev->count_ms++;key_read = key_dev->read_key();if(key_dev->count_ms < key_dev->long_click_ms){if(key_read == KEY_READ_UP){key_dev->status = KEY_STATUS_SHORT_UP_SHAKE; }return;}key_dev->status = KEY_STATUS_LONG_HANDLE; }/** description : short cilck key up filter shake param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_short_up_shake(struct key_dev *key_dev) {unsigned char key_read;static unsigned short old = 0xffff;if(old == 0xffff){old = key_dev->count_ms;key_dev->count_ms = 0;}key_dev->count_ms++;if(key_dev->count_ms < key_dev->shake_filter_ms){return;}key_read = key_dev->read_key();if(key_read == KEY_READ_UP){key_dev->status = KEY_STATUS_DOUBLE_CHECK;key_dev->count_ms = 0;}else{key_dev->status = KEY_STATUS_LONG_CHECK;key_dev->count_ms += old; }old = 0xffff; }/** description : double cilck check. we consider double click event if key pressed down when after short click up and within max double click interval param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_double_check(struct key_dev *key_dev) {unsigned char key_read;key_dev->count_ms++;key_read = key_dev->read_key();if(key_dev->count_ms < key_dev->max_dclick_ms){if(key_read == KEY_READ_DOWN){key_dev->status = KEY_STATUS_DOUBLE_DOWN_SHAKE;key_dev->count_ms = 0; }}else{key_dev->status = KEY_STATUS_SHORT_UP_HANDLE; }}/** description : short click key up handle param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_short_up_handle(struct key_dev *key_dev) {unsigned short key_val;key_val= key_dev->num<<8 | KEY_EVENT_SHORT;key_write_value(key_val);key_val= key_dev->num<<8 | KEY_EVENT_UP_SHORT;key_write_value(key_val);key_dev->status = KEY_STATUS_DOWN_CHECK; }/** description : double click key down filter shake param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_double_down_shake(struct key_dev *key_dev) {unsigned char key_read;static unsigned short old = 0xffff;if(old == 0xffff){old = key_dev->count_ms;key_dev->count_ms = 0;}key_dev->count_ms++;if(key_dev->count_ms < key_dev->shake_filter_ms){return;}key_read = key_dev->read_key();if(key_read == KEY_READ_DOWN){unsigned short key_val;key_val= key_dev->num<<8 | KEY_EVENT_DOUBLE;key_write_value(key_val);key_dev->status = KEY_STATUS_DOUBLE_UP_CHECK;key_dev->count_ms = 0;}else{key_dev->status = KEY_STATUS_DOUBLE_CHECK;key_dev->count_ms += old; }old = 0xffff; }/** description : double click key up check param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_double_up_check(struct key_dev *key_dev) {unsigned char key_read;key_read = key_dev->read_key();if(key_read == KEY_READ_UP){key_dev->status = KEY_STATUS_DOUBLE_UP_SHAKE;key_dev->count_ms = 0;} }/** description : double click key up filter shake param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_double_up_shake(struct key_dev *key_dev) {unsigned char key_read;key_dev->count_ms++;if(key_dev->count_ms < key_dev->shake_filter_ms){return;}key_read = key_dev->read_key();if(key_read == KEY_READ_UP){key_dev->status = KEY_STATUS_DOUBLE_UP_HANDLE;}else{key_dev->status = KEY_STATUS_DOUBLE_UP_CHECK;}}/** description : double click key up handle param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_double_up_handle(struct key_dev *key_dev) {unsigned short key_val;key_val= key_dev->num<<8 | KEY_EVENT_UP_DOUBLE;key_write_value(key_val);key_dev->status = KEY_STATUS_DOWN_CHECK; }/** description : long click handle after long click check param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_long_hanle(struct key_dev *key_dev) {unsigned short key_val;key_val= key_dev->num<<8 | KEY_EVENT_LONG;key_write_value(key_val);key_dev->status = KEY_STATUS_CONTINUE_CHECK;key_dev->count_ms = 0; }/** description : continue send short click if long click time overflow param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_continue_check(struct key_dev *key_dev) {unsigned char key_read;unsigned short key_val;key_dev->count_ms++;key_read = key_dev->read_key();if(key_read == KEY_READ_UP){key_dev->status = KEY_STATUS_LONG_UP_SHAKE;}if(key_dev->count_ms < key_dev->continue_send_ms){return;}if(key_dev->continue_send_ms == 0){return;}key_val= key_dev->num<<8 | KEY_EVENT_SHORT;key_write_value(key_val);key_dev->count_ms = 0; }/** description : long click key up filter shake param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_long_up_shake(struct key_dev *key_dev) {unsigned char key_read;static unsigned short old = 0xffff;if(old == 0xffff){old = key_dev->count_ms;key_dev->count_ms = 0;}key_dev->count_ms++;if(key_dev->count_ms < key_dev->shake_filter_ms){return;}key_read = key_dev->read_key();if(key_read == KEY_READ_UP){key_dev->status = KEY_STATUS_LONG_UP_HANDLE;}else{key_dev->status = KEY_STATUS_CONTINUE_CHECK;key_dev->count_ms += old; }old = 0xffff; }/** description : long click key up filter handle param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_status_long_up_handle(struct key_dev *key_dev) {unsigned short key_val;key_val= key_dev->num<<8 | KEY_EVENT_UP_LONG;key_write_value(key_val);key_dev->status = KEY_STATUS_DOWN_CHECK; }/** description : run key state machine once every 1ms param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02 */ static void key_check_1ms(struct key_dev *key_dev) {switch(key_dev->status){case KEY_STATUS_DOWN_CHECK :key_status_down_check(key_dev);break; case KEY_STATUS_DOWN_SHAKE : key_status_down_shake(key_dev);break; case KEY_STATUS_DOWN_HANDLE : key_status_down_handle(key_dev);break; case KEY_STATUS_LONG_CHECK : key_status_long_check(key_dev);break; case KEY_STATUS_SHORT_UP_SHAKE : key_status_short_up_shake(key_dev);break;case KEY_STATUS_DOUBLE_CHECK :key_status_double_check(key_dev);break;case KEY_STATUS_SHORT_UP_HANDLE :key_status_short_up_handle(key_dev);break;case KEY_STATUS_DOUBLE_DOWN_SHAKE : key_status_double_down_shake(key_dev);break;case KEY_STATUS_DOUBLE_UP_CHECK :key_status_double_up_check(key_dev);break;case KEY_STATUS_DOUBLE_UP_SHAKE :key_status_double_up_shake(key_dev);break;case KEY_STATUS_DOUBLE_UP_HANDLE :key_status_double_up_handle(key_dev);break; case KEY_STATUS_LONG_HANDLE :key_status_long_hanle(key_dev);break;case KEY_STATUS_CONTINUE_CHECK : key_status_continue_check(key_dev);break;case KEY_STATUS_LONG_UP_SHAKE : key_status_long_up_shake(key_dev);break;case KEY_STATUS_LONG_UP_HANDLE : key_status_long_up_handle(key_dev);break;default:key_dev->status = key_dev->status;} }/** description : run all key state machine once every 1ms param : key_dev - key device pointer retval : None author : huohongpeng data : 2017-03-02call :timer(1ms) interrupt handle */ void key_check_all_loop_1ms(void) {unsigned char key_num, i;key_num = sizeof(key_dev)/sizeof(struct key_dev);for(i = 0; i < key_num; i++){key_check_1ms(&key_dev[i]);}}

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