Istvan Cserny
Measures the temperature with averaging by using a Microchip MCP9700A analog thermometer. Averaged result is printed to standard output.
/ 05_analog_thermometer2
- Measeures the temperature by using a Microchip MCP9700A
- analog thermometer (parameteres: 10 mV/C, 500 mV offset, VCC= 2.3-5.5V)
- Averaged result is printed to standard output.
- Hardware requirements:
- - FRDM-KL25Z board
- - MCP9700A analog thermometer connected to A0 (PTB0)
- /
Revision 0:9f5cbd8850f2, committed 2015-11-18
- Comitter:
- icserny
- Date:
- Wed Nov 18 15:32:38 2015 +0000
- Commit message:
- First version
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Nov 18 15:32:38 2015 +0000
@@ -0,0 +1,29 @@
+/** 05_analog_thermometer2
+ * Measeures the temperature by using a Microchip MCP9700A
+ * analog thermometer (parameteres: 10 mV/C, 500 mV offset, VCC= 2.3-5.5V)
+ * Averaged result is printed to standard output.
+ *
+ * Hardware requirements:
+ * - FRDM-KL25Z board
+ * - MCP9700A analog thermometer connected to A0 (PTB0)
+ */
+
+#include "mbed.h"
+
+AnalogIn ain(A0); // Analog input at PTB0
+uint32_t mysum; // Used for summation
+
+int main()
+{
+ printf("\r\n05_analog_thermometer2 - with averaging\r\n");
+ while(1) {
+ mysum = 0;
+ for(int i=0; i<3300; i++) {
+ mysum += ain.read_u16(); // sum up raw 16-bit data
+ }
+ float voltage = mysum>>16; // voltage in millivolts
+ float tempC = (voltage -500)/10; // tempereature in Celsius
+ printf("voltage: %5.0f mV temp: %5.1f C\r\n",voltage,tempC);
+ wait(2);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Nov 18 15:32:38 2015 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/9296ab0bfc11 \ No newline at end of file