Cincoze DC-1100, User Manual

Page: 76 / 79

DC-1100
Compact Size Fanless Computer
| User’s Manual
76
Chapter 5: Product application
5.1.1.4.2 Control of GP80 to GP83 (DO1 ~ DO4)
#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
<Output Mode Selection> //Set GP80 to GP83 output Mode
WriteByte(AddrPort, 0x88) // Select configuration register 88h
WriteByte(DataPort, (0xX F ))
//Set (bit 0~3) = 1 to select GP 80 ~83 as Output mode.
<Output Value>
WriteByte(AddrPort, 0x89) // Select configuration register 89h
WriteByte(DataPort, Value) // Set bit 0~3=(0/1) to output GP 80~83
as Low or High
<Leave the Extended Function Mode>
WriteByte(AddrPort, 0xAA)