test.c

一个LED特效显示程序

//TWI initialize
// bit rate:1
void twi_init(void)
{
 TWCR= 0X00; //disable twi
 TWBR= 0x01; //set bit rate
 TWSR= 0x03; //set prescale
 TWAR= 0x01; //set slave address
 TWCR= 0x45; //enable twi
}

#pragma interrupt_handler twi_isr:18
void twi_isr(void)
{
 //twi event
}