adb指令实现:
adb root
adb remount
adb shell
echo -wdout 5 0 > /sys/class/misc/mtgpio/pin
echo -wdout 5 1 > /sys/class/misc/mtgpio/pin
C程序实现:
此方法适用于linux内核的系统,测试平台MTK8735。
输入参数:port ---> GPIO端口,如设置MTK的GPIO1端口时port=1
value ---> 1为高电平,0为低电平
返回值:小于等于0时设置失败;大于0时设置成功。
int setGpio(int port,int value) {
int result = 0;
int gpio_fd = 0;
char H_buf[128] = {0};
char L_buf[128] = {0};
gpio_fd = open("/sys/class/misc/mtgpio/pin", O_RDWR);
if(gpio_fd <= 0){
printf("open gpio port failed");
return 0;
}
sprintf(H_buf,"-wdout %d 1",port);//设置GPIO端口port为高电平
sprintf(L_buf,"-wdout %d 0",port);//设置GPIO端口port为低电平
if(value== 1) {
result = write(gpio_fd, H_buf, sizeof(H_buf));
} if(value== 0) else {
result = write(gpio_fd, L_buf, sizeof(L_buf));
}else{
printf("gpio value is err");
}
if(result <= 0){
printf("write gpio port failed");
}else{
printf("write gpio port success");
}
close(gpio_fd);
gpio_fd = -1;
return result;
}