如果事件的类型代码是EV_KEY,该代码code为设备键盘代码.0~127为键盘上的按键代码 关于按键代码的定义,部分如下所示: #define KEY_RESERVED 0 #define KEY_ESC 1 #define KEY_1 2 #define KEY_2 3 #define KEY_3 4 #define KEY_4 5 #define KEY_5 6 #define KEY_6 7 #define KEY_7 8 #define K...
如果事件的类型代码是EV_KEY,当按键按下时值为1,松开时值为0;如果事件的类型代码是EV_ REL,value的正数值和负数值分别代表两个不同方向的值。 /* * Event types */ #define EV_SYN 0x00 #define EV_KEY 0x01 //按键 #define EV_REL 0x02 //相对坐标(轨迹球) #define EV_ABS 0x03 //绝对坐标 #...
ขออภัย, ไอเท็มนี้ไม่มีแล้ว! จำหน่ายโดย EVKEY Official Store(ผู้ประกอบการค้า) จัดส่งไปยัง ...
]; //表示支持哪类事件,常用有以下几种事件(可以多选) //EV_SYN 同步事件,当使用input_event()函数后,就要使用这个上报个同步事件 //EV_KEY.../module.h> #include linux/version.h> #include linux...
[1], O_RDONLY); if (fd == -1) { perror("Cannot open input device"); return 1; } while (1) { read(fd, &ev, sizeof(struct input_event)); if (ev.type == EV_KEY) { printf("Key %d %s\n", ev.code, ev.value ? "pressed" : "released"); } } close(fd); return 0; ...
{ 12 int fd; 13 int err; 14 int len; 15 int i; 16 unsigned char byte; 17 int bit; 18 struct input_id id; 19 unsigned int evbit[2]; 20 char *ev_names[] = { 21 "EV_SYN ", 22 "EV_KEY ", 23 "EV_REL ", 24 "EV_ABS ", 25 "EV_MSC ", 26 "EV_SW ", 27 "NULL...
time 1504189579.29 type 4 (EV_MSC), code 4 (MSC_SCAN), value 18 time 1504189579.29 type 1 (EV_KEY), code 18 (KEY_E), value 1 time 1504189579.29 --- SYN_REPORT --- time 1504189579.4 type 4 (EV_MSC), code 4 (MSC_SCAN), value 18 time 1504189579.4 ...
unsigned int type = button->type ?: EV_KEY; bdata->input = input; bdata->button = button; error = gpio_keys_setup_key(pdev, bdata, button); if (error) goto fail2; if (button->wakeup) wakeup = 1; input_set_capability(input, type, button->code); ...
type:上报的事件类型,如EV_KEY code:事件码,比如KEY_0 value:事件值,比如1表示按键按下 还有其他API函数: 2.3上报同步事件 三、input_event结构体 表示所有的输入事件,定义在include/uapi/linux/input.h中,用户程序通过input_event获取到具体的事件和相关值 ...
5 .type = EV_KEY, \ 6 .code = ev_code, \ 7 .active_low = act_low, \ 8 .desc = "btn " descr, \ 9 .wakeup = wake, \ 10 .debounce_interval = debounce, \ 11 } 12 13 static struct gpio_keys_button imx6q_buttons[] = { ...