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#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
#include <glib.h>
#define I2C_BUS "/dev/i2c-3"
void I2C_Write(gulong address, guchar value) {
struct i2c_smbus_ioctl_data argswrite;
argswrite.read_write = I2C_SMBUS_WRITE;
argswrite.size = I2C_SMBUS_BYTE;
argswrite.data = NULL;
argswrite.command = value;
int device = open(I2C_BUS, O_RDWR);
// FIXME?
if (device == -1) return;
ioctl(device, I2C_SLAVE, address);
ioctl(device, I2C_SMBUS, &argswrite);
close(device);
}
guchar I2C_Read(gulong address) {
union i2c_smbus_data data;
struct i2c_smbus_ioctl_data argsread;
argsread.read_write = I2C_SMBUS_READ;
argsread.size = I2C_SMBUS_BYTE;
argsread.data = &data;
argsread.command = 0;
int device = open(I2C_BUS, O_RDWR);
if (device == -1) return device;
ioctl(device, I2C_SLAVE, address);
ioctl(device, I2C_SMBUS, &argsread);
close(device);
return data.byte;
}
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