Difference between revisions of "Temp sens.c"

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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.
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* http://ww1.microchip.com/downloads/en/devicedoc/21462c.pdf
 
* http://ww1.microchip.com/downloads/en/devicedoc/21462c.pdf
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<code><pre>
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#include <stdio.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#define I2C_DEVICE  "/dev/i2c/0"
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#define I2C_SLAVE  0x0703
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//Whats the temperature
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void printtemp()
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{
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char dbuff[10];
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//***TEMPERATURE
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i2c_read (0x48, dbuff, 1);
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printf ("Temperature :- %d degrees C\n", dbuff[0]);
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}
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int main(void)
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{
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printtemp();
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return 0;
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}
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</pre></code>

Revision as of 13:46, 22 May 2007

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];

	//***TEMPERATURE

	i2c_read (0x48, dbuff, 1);

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

int main(void)
{
	printtemp();

	return 0;

}