TMP05/TMP06

Rev. 0 | Page 23 of 28

3.3V

GND

FUNC

CONV/IN

OUT

TMP05

PIC16F876

0.1

µF

PA.0

FIRST TEMP

MEASUREMENT

TIME

SECOND TEMP

MEASUREMENT

CONTINUOUSLY CONVERTING APPLICATION

This section provides an example of how to connect one

TMP05 in continuously converting mode to a microchip

PIC16F876 microcontroller. Figure 37 shows how to interface to

the PIC16F876.

TMP05 Program Code Example 2 shows how to communicate

from the microchip device to the TMP05. This code can also be

used with other PICs by simply changing the include file for the

part.

Figure 37. Typical Daisy-Chain Application Circuit

TMP05 Program Code Example 2

//=============================================================================================

//

// Description : This program reads the temperature from a TMP05 part set up in continuously

// converting mode.

// This code was written for a PIC16F876, but can be easily configured to function with other

// PICs by simply changing the include file for the part.

//

//

Fosc = 4MHz

//

Compiled under CCS C compiler IDE version 3.4

//

PWM output from TMP05 connected to PortA.0 of PIC16F876

//

//============================================================================================

#include <16F876.h>

// Insert header file for the particular PIC being used

#device adc=8

#use delay(clock=4000000)

#fuses NOWDT,XT, PUT, NOPROTECT, BROWNOUT, LVP

//_______________________________Wait for high function_____________________________________

void wait_for_high() {

while(input(PIN_A0)) ;

/* while high, wait for low */

while(!input(PIN_A0));

/* wait for high */

}

//______________________________Wait for low function_______________________________________

void wait_for_low() {

while(input(PIN_A0));

/* wait for high */

}

//_______________________________Main begins here____________________________________________

void main(){

long int high_time,low_time,temp;

setup_adc_ports(NO_ANALOGS);

setup_adc(ADC_OFF);

setup_spi(FALSE);

setup_timer_1 ( T1_INTERNAL | T1_DIV_BY_2);

//Sets up timer to overflow after 131.07ms