Measurement-computing TempBook rev.3.0 Manual do Utilizador descarregar pdf (Página 46)

6-14 Standard API Programming of the TempBook with C TempBook User’s Manual

High-Level Thermocouple Measurement

***********************************************

File:

Description:

This example demonstrates the use of the TempBook's high level

thermocouple temperature data acquisition routines. These

functions have combined scan sequencer setup, ADC data

collection, and thermocouple linearization.

Functions Used:

tbkRdTemp(unsigned chan, unsigned tcType, int * temp)

tbkRdTempN( unsigned chan, unsigned tcType, unsigned count, int *

temp,

unsigned * buf, float freq, unsigned avg ) tbkRdTempScan(unsigned startChan,

unsigned endChan,unsigned tcType, int * temp) tbkRdTempScanN(unsigned

startChan,

unsigned endChan, unsigned tcType, unsigned count, int * temp, unsigned *

buf,

float freq, unsigned avg)

****************************************************/

int i, temp, temps[10];

unsigned buf[1200];

sprintf(response,"\r\nTempex1.c\r\n");

/* Set the default mode of operation to differential bipolar */

tbkSetMode(1, 1);

/* Get 1 ADC sample from a type J thermocouple on channel 0 and

convert the reading to a temperature. Print the result. */

tbkRdTemp(0, TbkTypeJ, &temp);

sprintf(tempstr,"\r\nResults of tbkRdTemp\r\n");

strcat(response,tempstr);

sprintf(tempstr,"Temperature: %4.1f \r\n", (float)temp/10.0);

strcat(response,tempstr);

/* Get 10 ADC samples from a type J thermocouple on channel 0 and

convert the readings to a single temperature using block averaging.

Print the results. */

tbkRdTempN(0, TbkTypeJ, 10, &temp, buf, 1000, 0);

sprintf(tempstr,"\r\nResults of tbkRdTempN\r\n");

strcat(response,tempstr);

sprintf(tempstr,"Temperature: %4.1f \r\n", (float)temp/10.0);

strcat(response,tempstr);

/* Get 1 ADC sample each from type J thermocouples on channels 0

through

7 and convert the readings to temperatures. Print the results */

tbkRdTempScan(0, 7, TbkTypeJ, temps);

sprintf(tempstr,"\r\nResults of tbkRdTempScan\r\n");

strcat(response,tempstr);

for (i=0 ; i<8 ; i++) {

sprintf(tempstr,"Channel %d Temperature: %4.1f \r\n", i,

(float)temps[i]/10.0);

strcat(response,tempstr);

}

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