Temp sens.c

From eLinux.org
Revision as of 05:46, 22 May 2007 by SpaceMonkey (Talk | contribs)

Jump to: navigation, search

Grab hold of a "Microchip TC74" temperature sensor IC, a TO220 is easy to handle, and hook it up to the bus using the pins as shown in the hardware hack section. Make sure you use a 3.3v part.

#include <stdio.h>
#include <fcntl.h>
#include <sys/ioctl.h>

#define I2C_DEVICE  "/dev/i2c/0"
#define I2C_SLAVE  0x0703

//Whats the temperature

void printtemp()
	char dbuff[10];


	i2c_read (0x48, dbuff, 1);

	printf ("Temperature :- %d degrees C\n", dbuff[0]);

int main(void)

	return 0;