Stanley Cohen
/
mbed_K20D50_temp_blinky
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mbed_blinky
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Revision 7:7032b113e13b, committed 2014-10-22
- Comitter:
- scohennm
- Date:
- Wed Oct 22 01:30:06 2014 +0000
- Parent:
- 6:e8cd76f38fa9
- Commit message:
- Experiment with K20D50M Temperature sensor BD1020HFV Temperature sensor. Sitnal routed from J13 to PTC0
Changed in this revision
diff -r e8cd76f38fa9 -r 7032b113e13b main.cpp
--- a/main.cpp Fri May 09 19:58:03 2014 +0300
+++ b/main.cpp Wed Oct 22 01:30:06 2014 +0000
@@ -1,12 +1,45 @@
#include "mbed.h"
-DigitalOut myled(LED1);
+#define LEDOFF 1
+#define LEDON 0
+#define DATATIME 0.4
+// temp contants
+#define REFVOLTS 1.29
+#define REFTEMP 30.0
+#define VDD 3.3
+#define TEMPSLOPE -0.0081
+// Conversion to F
+#define CZERO 32.0
+#define CFSLOPE 1.8
+
+
+Serial pc(USBTX, USBRX);
+DigitalOut myRled(LED_RED);
+DigitalOut myGled(LED_GREEN);
+DigitalOut myBled(LED_BLUE);
+
+AnalogIn tempSensor(PTC0); // jumper on board J13 left pin to PTC0 J10-2
int main() {
- while(1) {
- myled = 1;
- wait(0.2);
- myled = 0;
- wait(0.2);
+ float rawVolts;
+ float rawTemp;
+ float actTemp; //actual temperature
+ float FTemp;
+ int LEDState = LEDON;
+
+ myBled.write(LEDOFF);
+ myGled.write(LEDOFF);
+ while(true) {
+
+ rawTemp = tempSensor.read();//actually percentatd of Vdd volts
+ rawVolts = VDD * rawTemp;
+ actTemp = REFTEMP + (rawVolts - REFVOLTS)/TEMPSLOPE;
+ FTemp = CZERO + actTemp*CFSLOPE;
+ pc.printf("RawTemp = %f Actual Ctemp = %5.2f Ftemp = %5.2f\r\n", rawTemp, actTemp, FTemp);
+
+ myRled.write(LEDState);
+ LEDState = !LEDState;
+ wait(DATATIME);
+
}
}
diff -r e8cd76f38fa9 -r 7032b113e13b mbed.bld --- a/mbed.bld Fri May 09 19:58:03 2014 +0300 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1 +0,0 @@ -http://mbed.org/users/mbed_official/code/mbed/builds/ \ No newline at end of file
diff -r e8cd76f38fa9 -r 7032b113e13b mbed.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.lib Wed Oct 22 01:30:06 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/#552587b429a1