Add init_thermometer source code.

This util is moved from rtool repository.

.gitignore

 #Ignore binary files
 nethist/nethist
+init_thermometer/init_thermometer

init_thermometer/Makefile

+BIN=init_thermometer
+SRC=init_thermometer.c
+CC=gcc
+FLAGS=-Wall -Wextra -pedantic -std=gnu99 -O0 -g
+LIBS=
+
+$(BIN): $(SRC)
+	$(CC) $(FLAGS) $(LIBS) -o $(BIN) $(SRC)
+
+clean:
+	rm $(BIN)

init_thermometer/init_thermometer.c

+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <errno.h>
+#include <string.h>
+#include <linux/i2c.h>
+#include <linux/i2c-dev.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#define HANDLE_ERROR (fprintf(stderr, "ERROR: %s\n", strerror(errno)))
+
+#define I2C_LOCAL "/dev/i2c-0"
+#define I2C_ADDRESS_7_THERMOMETER 0x4C
+
+#define LOCAL_HIGH_REG 0x0B
+#define REMOTE_HIGH_REG 0x0D
+#define LOCAL_T_CRIT_REG 0x20
+#define REMOTE_T_CRIT_REG 0x19
+#define HISTERSE_T_CRIT_REG 0x21
+#define CONV_RATE_REG 0x0A
+#define ALERT_MODE_REG 0xBF
+
+//Commands set for thermometer
+unsigned char commands[][2] = {
+	{ LOCAL_HIGH_REG,		0x32 }, // 50C ==> 0x32
+	{ REMOTE_HIGH_REG,		0x50 }, // 80C ==> 0x50
+	{ LOCAL_T_CRIT_REG,		0x41 }, // 65C ==> 0x41
+	{ REMOTE_T_CRIT_REG,	0x5F }, // 95C ==> 0x5F
+	{ HISTERSE_T_CRIT_REG,	0x05 }, // 5C  ==> 0x05
+	{ CONV_RATE_REG,		0x08 }, // 16Hz ==> 0x08
+	{ ALERT_MODE_REG,		0x00 }, // Iterrupt mode ==> 0x00
+	{ 0, 0 }
+};
+
+int main(int argc, char **argv) {
+	(void) argc; (void) argv;
+	//Prepare I2C device
+	int fd = open(I2C_LOCAL, O_RDWR);
+	if (fd < 0) {
+		fprintf(stderr, "Cannot open I2C raw device.\n");
+		return 2;
+	}
+	if (ioctl(fd, I2C_SLAVE, I2C_ADDRESS_7_THERMOMETER) < 0) {
+		HANDLE_ERROR;
+		return 1;
+	}
+
+	//Send configuration
+	for (size_t i = 0; commands[i][0] != 0; i++) {
+		if (write(fd, commands[i], 2) < 0) {
+			HANDLE_ERROR;
+			return 2;
+		}
+	}
+
+	//Close files and devices
+	close(fd);
+
+	return 0;
+}