Unicorn Computer ENDAT-9401F/H, User Manual

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User’s Manual
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2-7. Digital I/O
1) Pin out of digital I/O header (J2):
Pin No. Function Pin No. Function
1 +5V 2 +5V
3
DIO-O0
4
DIO-I0
5 DIO-O1 6 DIO-I1
7 DIO-O2 8 DIO-I2
9
DIO-O3
10
DIO-I3
11 DIO-O4 12 DIO-I4
13 DIO-O5 14 DIO-I5
15
GND
16
GND
17 DIO-O6 18 DIO-I6
19 DIO-O7 20 DIO-I7
21 +3.3V 22 +3.3V
This function is supported by onboard super I/O chip; it can be control easily by
change the register of super I/O chip via I/O port “2Eh” “2Fh” and “4Eh” “4Fh”.
Please see the sample code of below for implement.
Voltage tolerance: +/- 5% with 0V to +5V.
2) Digital I/O control port (2E,2Fh):
Register configuration:
Bit No 7 6 5 4 3 2 1 0
Map IN3 IN2 OUT3 OUT2 OUT1 OUT0 IN1 IN0
Sample code for input bit 0~3 (using Turbo C/C++ 3.0):
#define input_port 0x2f
outportb(0x2e,0x87); //Unlock
register
outportb(0x2e,0x87); //Unlock register
outportb(0x2e,0x07); //Set Logic Device number pointer
outportb(0x2f,0x07);
//Set Logic Device number
outportb(0x2e,0xF1); //Set active register is CRF1
read_data=inportb(input_port); // Read digital input data
printf(“DIO-Input=%02X\n”,read_data); //Show digital input data on screen
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The ENDAT-9401F/H System Board
Sample code for output bit 0~3 (using Turbo C/C++ 3.0):
outportb(0x2e,0x87); //Unlock register
outportb(0x2e,0x87); //Unlock register
outportb(0x2e,0x07); //Set Logic Device number pointer
outportb(0x2f,0x07);
//Set Logic Device number
outportb(0x2e,0xF2); //Set active register is CRF2
outportb(0x2f,0x00);
//Write data to digital output
3) Digital I/O control port (4E,4Fh):
Register configuration:
Bit No 7 6 5 4 3 2 1 0
Map IN7 IN6 OUT7 OUT6 OUT5 OUT4 IN5 IN4
Sample code for input bit 4~7(using Turbo C/C++ 3.0):
#define input_port 0x2f
outportb(0x4e,0x87); //Unlock
register
outportb(0x4e,0x87); //Unlock register
outportb(0x4e,0x07); //Set Logic Device number pointer
outportb(0x4f,0x07);
//Set Logic Device number
outportb(0x4e,0xF1); //Set active register is CRF1
read_data=inportb(input_port); // Read digital input data
printf(“DIO-Input=%02X\n”,read_data); //Show digital input data on screen
Sample code for output bit 4~7(using Turbo C/C++ 3.0):
outportb(0x4e,0x87); //Unlock register
outportb(0x4e,0x87); //Unlock register
outportb(0x4e,0x07); //Set Logic Device number pointer
outportb(0x4f,0x07);
//Set Logic Device number
outportb(0x4e,0xF2); //Set active register is CRF2
outportb(0x4f,0x00);
//Write data to digital output