607fb371654b001a1a4895c049d8d0ac

利用带有I2C总线接口的日历时钟芯片DS1337

#include "ds1337.h"
#include "stdio.h"
int main (void) __attribute__ ((weak, alias ("alt_main")));

int main(void)
{ unsigned char  s,h,m;  //second,hour ,minute
  s=0x45;
  h=0x01;
  m=0x59;
  ds1337_initial();                            
  ds1337_setradom(0x00,s);// set second         need hex format
  ds1337_setradom(0x01,m);// set minute              ......
  ds1337_setradom(0x02,h);// set hour
  printf("settime is %x,%x,%x\n",h,m,s);
  while(1)
  {
    s=ds1337_getradom(0x00);// read second
    m=ds1337_getradom(0x01); // read minute
    h=ds1337_getradom(0x02); // read hour
    printf("now time is %x,%x,%x\n",h,m,s);
    delay(100000);
  }
}