ARM®mbed OS入门开发（四 B）基于mbed的RTC时间显示到串口程序

anywill 提问时间：2016-10-19 11:49 /

一个简单的基于mbed的RTC时间显示到串口程序
#include "mbed.h"

DigitalOut myled(LED1);

int main() {

printf("RTC example\n");
//set_time(1387188300); // 起始时间Set RTC time to 16 December 2013 10:05:00 UTC
                        //从2013 10:05:00 开始计时
                        //按秒调整时间
                        //起始时间加一天即1387188300+86400
                        //起始时间加一月即1387188300+2592000  按30天算
                        //起始时间加一月即1387188300+31536000 按365天算
                        //1476612300 Sun Oct 16 10:05:53 2016
set_time(1476612300); // Sun Oct 16 10:05:53 2016

printf("Date and time are set.\n");

while(1) {

      time_t seconds = time(NULL);

      //printf("Time as seconds since January 1, 1970 = %d\n", seconds);

      printf("Time as a basic string = %s", ctime(&seconds));//把time_t类型转换成字符串类型

      //char buffer[32];
      //strftime(buffer, 32, "%I:%M:%S %p\n", localtime(&seconds));
      //printf("Time as a custom formatted string = %s", buffer);

      myled = !myled;
      wait(1);
}
}