Istvan Cserny / Mbed 2 deprecated 05_analog_thermometer

Measures the temperature by using a Microchip MCP9700A analog thermometer. Result is printed to standard output.

Dependencies:   mbed

05_analog_thermometer

Measures the temperature by using a Microchip MCP9700A analog thermometer (parameteres: 10 mV/C, 500 mV offset, VCC= 2.3-5.5V). The result is printed to standard output.

Hardware requirements:

  • FRDM-KL25Z board
  • MCP9700A analog thermometer connected to the A0 (PTB0) analog input

/media/uploads/icserny/05_analog_thermometer_bb.png

main.cpp@0:d5f4c581840b, 2015-11-18 (annotated)

Committer:
icserny
Date:
Wed Nov 18 15:31:37 2015 +0000
Revision:
0:d5f4c581840b
First version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
icserny 0:d5f4c581840b 1 /** 05_analog_thermometer
icserny 0:d5f4c581840b 2 * Measeures the temperature by using a Microchip MCP9700A
icserny 0:d5f4c581840b 3 * analog thermometer (parameteres: 10 mV/C, 500 mV offset, VCC= 2.3-5.5V)
icserny 0:d5f4c581840b 4 * Result is printed to standard output.
icserny 0:d5f4c581840b 5 *
icserny 0:d5f4c581840b 6 * Hardware requirements:
icserny 0:d5f4c581840b 7 * - FRDM-KL25Z board
icserny 0:d5f4c581840b 8 * - MCP9700A analog thermometer connected to A0 (PTB0)
icserny 0:d5f4c581840b 9 */
icserny 0:d5f4c581840b 10
icserny 0:d5f4c581840b 11 #include "mbed.h"
icserny 0:d5f4c581840b 12
icserny 0:d5f4c581840b 13 AnalogIn ain(A0); // Analog input at PTB0
icserny 0:d5f4c581840b 14
icserny 0:d5f4c581840b 15 int main()
icserny 0:d5f4c581840b 16 {
icserny 0:d5f4c581840b 17 printf("\r\n05_analog_thermometer program\r\n");
icserny 0:d5f4c581840b 18 while(1) {
icserny 0:d5f4c581840b 19 uint16_t raw = ain.read_u16(); // read raw 16-bit data
icserny 0:d5f4c581840b 20 float voltage = ain.read()*3300; // read voltage in millivolts
icserny 0:d5f4c581840b 21 float tempC = (voltage -500)/10; // tempereature in Celsius
icserny 0:d5f4c581840b 22 printf("ADC: 0x%04X voltage: %5.0f temp: %5.1f C\r\n",raw,voltage,tempC);
icserny 0:d5f4c581840b 23 wait(2);
icserny 0:d5f4c581840b 24 }
icserny 0:d5f4c581840b 25 }