单片机课程设计报告(14)

单片机课程设计报告

I2C_delay(); SCLK=1;

I2C_delay(); if(SDA)

dat|=0x80>>i; }

SCLK=0;

return (dat); }

5.DS1307驱动程序

/******************************** DS1307 PART START ****************/

unsigned char Write1307(unsigned char add,dat) {

unsigned char temp; temp=dat/10; temp<<=4;

temp=dat%10+temp;

I2C_start();

I2C_write_byte(0xD0); I2C_send_ack(0);

I2C_write_byte(add); I2C_send_ack(0);

I2C_write_byte(temp); I2C_send_ack(1); I2C_stop();

return (0); }

/***********************************************************************/

unsigned char Read1307(unsigned char add) {

unsigned char temp,dat; I2C_start();

I2C_write_byte(0xD0); I2C_send_ack(0); I2C_write_byte(add);