#define SCL P34
#define SDA P35

void delay_5us();
void i2c_start();
void i2c_stop();
void i2c_write(uchar dat);
uchar i2c_read();
 
void X9241(uchar pow,uchar Channle) ;
uchar read_24c64(unsigned char adr);
void write_24c64(unsigned char adr,uchar dat);