NEXCOM EBC 352 - Manual (Page 68)

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. 55
Appendix B: GPI/O Programming Guide
EBC 352 User Manual
A
ppendix
B: Gpi/O p
rOGrAmminG
G
uide
GPI/O (General Purpose Input/Output) pins are provided for custom system
design. This appendix provides definitions and default settings for the ten
GPI/O pins in the EBC 352 series. The pin definition is shown in the follow-
ing table:
J3 - GPIO Connector
GPIO Programming Sample Code
#define GPIO_PORT 0x284
#define GPO3 (0x01 << 4)
#define GPO5 (0x01 << 5)
#define GPO7 (0x01 << 6)
#define GPO9 (0x01 << 7)
#define GPO3_HI outportb(GPIO_PORT, 0x10)
#define GPO3_LO outportb(GPIO_PORT, 0x00)
#define GPO5_HI outportb(GPIO_PORT, 0x20)
#define GPO5_LO outportb(GPIO_PORT, 0x00)
#define GPO7_HI outportb(GPIO_PORT, 0x40)
#define GPO7_LO outportb(GPIO_PORT, 0x00)
#define GPO9_HI outportb(GPIO_PORT, 0x80)
#define GPO9_LO outportb(GPIO_PORT, 0x00)
void main(void)
{
GPO3_HI;
GPO5_LO;
GPO7_HI;
GPO9_LO;
}
Pin GPI/O
Mode
PowerOn
Default
Address Pin GPI/O
Mode
PowerOn
Default
Address
1 VCC - - 2 GND - -
3 GPO Low 284h
(Bit4) 4 GPI High 284h
(Bit0)
5 GPO Low 284h
(Bit5) 6 GPI High 284h
(Bit1)
7 GPO Low 284h
(Bit6) 8 GPI High 284h
(Bit2)
9 GPO Low 284h
(Bit7) 10 GPI High 284h
(Bit3)
Control the GPO pin (3/5/7/9) level from I/O port 284h bit (4/5/6/7).
The bit Set/Clear indicates output High/Low.