Rohm / Mbed 2 deprecated BD1020HFV_Hello

BD1020HFV Temperature sensor test code

Dependencies:   mbed

main.cpp@2:913fc12a42a7, 2016-09-21 (annotated)

Committer:
MikkoZ
Date:
Wed Sep 21 09:57:41 2016 +0000
Revision:
2:913fc12a42a7
Parent:
1:ba7e525074f9 
Alternative temperature formula added.; ; - Added temperature formula; - Added comments about values used in both formulas; ; Tested on GR-Peach + Rohm tile shield + BD1020 on analog_2 connector

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MACRUM 0:ee7b9cc966d7 1 #include "mbed.h"
MACRUM 0:ee7b9cc966d7 2
MACRUM 0:ee7b9cc966d7 3 Serial pc(USBTX, USBRX);
MACRUM 0:ee7b9cc966d7 4 AnalogIn sensor(A2);
MACRUM 0:ee7b9cc966d7 5
MACRUM 0:ee7b9cc966d7 6 int main() {
MikkoZ 2:913fc12a42a7 7 float temperature1;
MikkoZ 2:913fc12a42a7 8 float temperature2;
MikkoZ 2:913fc12a42a7 9 pc.printf("\n\r");
MikkoZ 2:913fc12a42a7 10 pc.printf("BD1020HFV Temperature sensor test program.\n\r");
MikkoZ 2:913fc12a42a7 11 pc.printf("All values are approximates based on specification graph.\n\r");
MikkoZ 2:913fc12a42a7 12 pc.printf("Formula values should be calibrated before use.\n\r");
MACRUM 0:ee7b9cc966d7 13 while(1) {
MikkoZ 2:913fc12a42a7 14 //Input voltage 0-3.3V == 0.0-1.0f
MikkoZ 2:913fc12a42a7 15 //-40'C == 1.87V
MikkoZ 2:913fc12a42a7 16 // 0'C == 1.546V
MikkoZ 2:913fc12a42a7 17 //192'C == 0V (out of scale)
MikkoZ 2:913fc12a42a7 18 //1.87V / 232'C = 0.008060V/'C
MikkoZ 2:913fc12a42a7 19
MikkoZ 2:913fc12a42a7 20 temperature1 = -(1000 * (sensor * 3.3f) - 1546) / 8.2;
MikkoZ 2:913fc12a42a7 21 temperature2 = 192 - ( sensor * 3.3f / 0.008060 );
MikkoZ 2:913fc12a42a7 22 pc.printf("Temperature, formula1=%5.3f, formula2=%5.3f\r\n", temperature1, temperature2);
MikkoZ 2:913fc12a42a7 23 wait(1);
MACRUM 0:ee7b9cc966d7 24 }
MACRUM 0:ee7b9cc966d7 25 }