写一个模拟STM32定时器功能的C语言代码
时间: 2023-04-03 22:05:28 浏览: 61
好的,我可以回答这个问题。以下是一个简单的模拟STM32定时器功能的C语言代码:
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <time.h>
#define TIMER_INTERVAL_SEC 1
void timer_handler(int signum)
{
printf("Timer expired.\n");
}
int main()
{
struct sigaction sa;
struct itimerval timer;
// Install timer_handler as the signal handler for SIGALRM.
sa.sa_handler = &timer_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
if (sigaction(SIGALRM, &sa, NULL) == -1) {
perror("sigaction");
exit(1);
}
// Configure the timer to expire after TIMER_INTERVAL_SEC seconds.
timer.it_value.tv_sec = TIMER_INTERVAL_SEC;
timer.it_value.tv_usec = 0;
timer.it_interval.tv_sec = TIMER_INTERVAL_SEC;
timer.it_interval.tv_usec = 0;
// Start the timer.
if (setitimer(ITIMER_REAL, &timer, NULL) == -1) {
perror("setitimer");
exit(1);
}
// Wait for the timer to expire.
while (1) {
sleep(1);
}
return 0;
}