應(yīng)用層測試代碼

#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

#include <linux/input.h>

#include <sys/fcntl.h>

int main(int argc, char *argv[])

{

?????? int fd = -1;

?????? int num;

?????? size_t rb;

?????? int version;

?????? char name[20];

?????? struct input_event ev;

?????? int i=0;

?????? if ((fd = open("/dev/input/event1", O_RDONLY)) < 0)? //打開設(shè)備

?????? {

????????????? perror("open error");

????????????? exit(1);

?????? }

?????? while(1)

?????? {

????????????? rb = read(fd, &ev, sizeof(struct input_event));? //讀取設(shè)備

????????????? if (rb < (int)sizeof(struct input_event))? //讀取錯誤

????????????? {

???????????????????? perror("read error");

???????????????????? exit(1);

????????????? }

????????????? if (EV_KEY==ev.type)???????????????????? //讀取的是否是按鍵內(nèi)容

????????????? {

???????????????????? if (1 == ev.value)?????????????????? //key1被按下

???????????????????? printf("key is pressed\n");

???????????????????? else?????? ????????????????????????????????????????????? ??//key1被釋放

???????????????????? printf("key is released\n");

????????????? }?????

?????? }????

?????? ?close(fd);

?????? return 0;

}

轉(zhuǎn)載于:https://www.cnblogs.com/zym0805/p/5983885.html

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