NEXCOM NEX 880 - Manual (Page 58)

Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved. 45 NEX 880/890 User Manual
Appendix B: GPIO Programming Sample Code
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Ample
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GPIO Programming Sample Code
#define GPIO_PORT 0x50F
#define GPO1 (1<<3)
#define GPO2 (1<<4)
void main(void)
{
#Set GPO to be low
outportb(GPIO_PORT, (inportb(GPIO_PORT) & (~GPO1) & (~GPO2) ));
# Set GPO to be high
outportb(GPIO_PORT, (inportb(GPIO_PORT) | GPO1 |GPO2 ));
}