Cincoze CS-100/P1100 Series, User Manual

Page: 86 / 97

CS - 100/
P1100 Series | User Manual
86
5.1.1.4 Sample Code in C Language
5.1.1.4.1 Control of GP74 to GP77 (DI1 ~ DI4)
#define AddrPort 0x4E
#define DataPort 0x4F
<Enter the Extended Function Mode>
WriteByte(AddrPort, 0x87)
WriteByte(AddrPort, 0x87)
// Must write twice to enter Extended mode
<Select Logic Device>
WriteByte(AddrPort, 0x07)
WriteByte(dataPort, 0x06)
// Select logic device 06h
<Input Mode Selection>
// Set GP74 to GP77 input Mode
WriteByte(AddrPort, 0x80) // Select configuration register 80h
WriteByte(DataPort, 0x0X) // Set (bit 4~7) = 0 to select GP 74~77 as Input mode.
<Input Value>
WriteByte(AddrPort, 0x82)
// Select configuration register 82h
ReadByte(DataPort, Value) // Read bit 4~7 (0xFF)= GP74 ~77 as High.
<Leave the Extended Function Mode>
WriteByte(AddrPort, 0xAA)