d0b71e41504b001a1b0cecf7513195ea

利用带有I2C总线接口的日历时钟芯片DS1337

#include "ic.h"
#include "stdio.h"
#include "alt_types.h"
//unsigned char display_buffer[8];
alt_u8 display_buffer[8];
int main (void) __attribute__ ((weak, alias ("alt_main")));

  

int alt_main (void)
{
  int i;
  IOWR_ALTERA_AVALON_PIO_DATA(LEDPIO_BASE,0x0a);
  initialic();
  display_buffer[0]=0x07;
  display_buffer[1]=0xaa;
  display_buffer[2]=0x55;
  display_buffer[3]=0xff;
  display_buffer[4]=0x00;
  display_buffer[5]=0xee;
  display_buffer[6]=0x77;
  display_buffer[7]=0x05;
  for(i=0;i<8;i++)
  {
    wr_24c01(i,display_buffer[i]);
    //printf("write display_buffer[%d]=%d\n",i,display_buffer[i]);
    display_buffer[i]=0;
     delayic(10000);
    display_buffer[i]=rd_24c01(i);
    delayic(10000);
    IOWR_ALTERA_AVALON_PIO_DATA(LEDPIO_BASE,display_buffer[i]);   
  }
  
}