/*****************PCF8820 IIC 初始化程序***************************/
void PCF8820INIT(void)
{
RES=1;
flash(40); /****DELAY 40mS***/
RES=0;
flash(2); /****DELAY 2mS***/
RES=1;
flash(10); /****DELAY 10mS***/
start(); //I2C start signal
write(0x78); /* SA1 SA0 R/W = 000 */
write_byte(0x01); /* jmp H[2:0]=000 */
write_byte(0x09); /* jmp H[2:0]=001 */
write_byte(0x06); /* set display mode , D=1 E=0 is normal mode */
write_byte(0x12); /* bias 1/9 */
write_byte(0x38);
write_byte(0x01); /* jmp H[2:0]=000 */
write_byte(0x18); /* DO=1 PD=0 V=0 */
write_byte(0x0c); /* jmp H[2:0]=100 */
write_byte(0x04); /* DOF=0 DM=0 */
