Portwell ROBO-8115VG2AR, User Manual

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ROBO-8115VG2AR
Copyright © Portwell 2021 ROBO-8115VG2AR User's Guide 41
4.2 GPIO Signal
#include <stdio.h>
#include <unistd.h>
#include <stdint.h>
#include <sys/io.h>
#define EC_IOSpace 0xE300 // EC IO Space Base Addr = 0xE000
// EC Internal Offset = 0x300
// EC IO Address = IO Space Base Addr + Internal offset
#define GPCR 0x2B // GPIO Coutrol Register, Bit7 = GPO3, Bit6 = GPO2, ...,
// Bit3 = GPI3, Bit2 = GPI2, ...,
// 0: Output; 1: Input
#define GPDR 0x2C // GPIO Status Register, Bit7 = GPO3, Bit6 = GPO2, ...,
// Bit3 = GPI3, Bit2 = GPI2, ...,
// 0: Low; 1: High
int Read_EC_SRAM(int offset)
{
int Temp;
Temp = inb_p(EC_offset);
return Temp;
}