在ZigBee中用循环写一个按住按键呼吸,松开按键维持当前亮度的代码
时间: 2023-04-03 07:03:00 浏览: 86
以下是 ZigBee 中用循环写一个按住按键呼吸,松开按键维持当前亮度的代码:
```c
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <termios.h>
#include <time.h>
#define LED_PIN 1
#define BUTTON_PIN 2
int main(int argc, char **argv)
{
int fd;
unsigned char buf[2];
struct termios opt;
int value = 0;
int direction = 1;
int step = 5;
int max_value = 100;
int min_value = 0;
int button_pressed = 0;
fd = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY | O_NDELAY);
if (fd < 0) {
perror("open");
exit(1);
}
tcgetattr(fd, &opt);
cfsetispeed(&opt, B9600);
cfsetospeed(&opt, B9600);
opt.c_cflag |= (CLOCAL | CREAD);
opt.c_cflag &= ~PARENB;
opt.c_cflag &= ~CSTOPB;
opt.c_cflag &= ~CSIZE;
opt.c_cflag |= CS8;
opt.c_cflag &= ~CRTSCTS;
opt.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
opt.c_oflag &= ~OPOST;
opt.c_cc[VMIN] = 1;
opt.c_cc[VTIME] = 0;
tcsetattr(fd, TCSANOW, &opt);
while (1) {
if (button_pressed) {
value += direction * step;
if (value >= max_value) {
value = max_value;
direction = -1;
} else if (value <= min_value) {
value = min_value;
direction = 1;
}
}
buf[0] = LED_PIN;
buf[1] = value;
write(fd, buf, 2);
usleep(10000);
buf[0] = BUTTON_PIN;
read(fd, buf, 1);
if (buf[0] == 0) {
button_pressed = 1;
} else {
button_pressed = 0;
}
}
close(fd);
return 0;
}
```