STC micro STC8A8K64D4 Series - Page 625

STC8A8K64D4 Series Manual
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P1M1 = 0x00;
P2M0 = 0x00;
P2M1 = 0x00;
P3M0 = 0x00;
P3M1 = 0x00;
P4M0 = 0x00;
P4M1 = 0x00;
P5M0 = 0x00;
P5M1 = 0x00;
P_SW2 = 0x80;
I2CCFG = 0xe0; //Enable I2C master mode
I2CMSST = 0x00;
Start(); //Send start command
SendData(0xa2); //Send device address + write command
RecvACK();
SendData(0x02); //Send storage address
RecvACK();
SendData(0x00); //Set second value
RecvACK();
SendData(0x00); //Set minute value
RecvACK();
SendData(0x12); //Set hour value
RecvACK();
Stop(); //Send stop command
while (1)
{
Start(); //Send start command
SendData(0xa2); //Send device address + write command
RecvACK();
SendData(0x02); //Send storage address
RecvACK();
Start(); //Send start command
SendData(0xa3); //Send device address + read command
RecvACK();
P0 = RecvData(); //Read second value
SendACK();
P2 = RecvData(); //Read minute value
SendACK();
P3 = RecvData(); //Read hour value
SendNAK();
Stop(); //Send stop command
Delay();
}
}
Assembly code
;Operating frequency for test is 11.0592MHz
P_SW2 DATA 0BAH
I2CCFG XDATA 0FE80H
I2CMSCR XDATA 0FE81H