AAEON AEC-6977 - Manual (Page 114)

E m b e d d e d C o n t r o l l e r A E C - 6 9 7 7
Appendix D Electrical Specifications for I/O Ports D-9
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Boolean
SIOBitRead(byte LDN, byte Register, byte BitNum) {
Byte TmpValue;
SIOEnterMBPnPMode();
SIOSelectLDN(LDN);
IOWriteByte(SIOIndex, Register);
TmpValue = IOReadByte(SIOData);
TmpValue &= (1 << BitNum);
SIOExitMBPnPMode();
If(TmpValue == 0)
Return 0;
Return 1;
}
VOID ConfigToOutputMode(byte LDN, byte Register, byte BitNum) {
Byte TmpValue, OutputEnableReg;
OutputEnableReg = Register‐1;
SIOEnterMBPnPMode();
SIOSelectLDN(LDN);
IOWriteByte(SIOIndex, OutputEnableReg);
TmpValue = IOReadByte(SIOData);
TmpValue |= (1 << BitNum);
IOWriteByte(SIOData, OutputEnableReg);
SIOExitMBPnPMode();
}
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