Portwell PEB-7602, Руководство пользователя

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PEB-7602 User’s Manual
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Appendix B: GPI/O Programming
The General Purpose I/O pins are provided for custom system design. The pin
programming as input mode or output mode is depending on the configuration. The pin
definitions are as the following table:
GPIOBASE Address: 480h
Pin No. IN/OUT Register Address Data Register Address PIN BIT
2 GP 04h SE + 0Ch + 3 3 + 3 GPIOBA
3 GP 04h + 1 GPIOBAS 0 E + 0Ch + 1
4 GPIOBA 04h + 3 GP 0Ch + 3 4 SE +
5 GPIOBA 04h + 1 GP 0Ch + 1 7 SE +
6 GPIOBA 34h + 0 + 38h + 0 1 SE + GPIOBASE
7 GPIOBA 04h + 2 + 0Ch + 2 4 SE + GPIOBASE
8 GPIOBA 34h + 0 38h + 0 2 SE + GP
9 GPIOBA 04h + 3 2 SE + GP 0Ch + 3
IN/OUT Register
0: The respective GPIO PIN is programmed as an output port
PIN is programmed as an input port
t port
port
output port and output LOW
le:
7);
// set bit3 to 0
// set pin2 to be an output port
// set bit3 to 0
6. outportb(0x48F, iret); // set pin2 to output low
1: The respective GPIO
Data Register
Read/Write: for outpu
Read Only: for input
Configure pin 2 to be an
【
C Language
】
Examp
1. int iret = inportb(0x48
2. iret = iret & ~0x08;
3. outportb(0x487, iret);
4. iret = inportb(0x48F);
5. iret = iret & ~0x08;