Aaeon BOXER-6639 - Page 100

Appendix C – Digital I/O Information 87
Fanless Embedded Box PC BOXER-6639
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VOID
SIOEnterMBPnPMode(){
IOWriteByte(SIOIndex, 0x87);
IOWriteByte(SIOIndex, 0x87);
}
VOID
SIOExitMBPnPMode(){
IOWriteByte(SIOIndex, 0xAA);
}
VOID
SIOSelectLDN(byte LDN){
IOWriteByte(SIOIndex, 0x07); // SIO LDN Register Offset = 0x07
IOWriteByte(SIOData,
LDN);
}
VOID
SIOBitSet(byte LDN, byte Register, byte BitNum, byte Value){
Byte TmpValue;
SIOEnterMBPnPMode();
SIOSelectLDN(byte
LDN);
IOWriteByte(SIOIndex, Register);
TmpValue = IOReadByte(SIOData);
TmpValue &= ~(1 << BitNum);
TmpValue |= (Value << BitNum);
IOWriteByte(SIOData, TmpValue);
SIOExitMBPnPMode();
}
VOID
SIOByteSet(byte LDN, byte Register, byte Value){
SIOEnterMBPnPMode();
SIOSelectLDN(LDN);
IOWriteByte(SIOIndex, Register);
IOWriteByte(SIOData,
Value);
SIOExitMBPnPMode();
}
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