Jiri Hladik / Mbed 2 deprecated Thermo_Voltmeter

Program reads temperature from internal thermo meter and voltage on A0. Both values are displayed on LCD

Dependencies:   Freetronics_16x2_LCD mbed

Fork of Freetronics_16x2_LCD by Shields

main.cpp@3:8ed2cd310fa7, 2015-01-31 (annotated)

Committer:
jirik09
Date:
Sat Jan 31 15:53:05 2015 +0000
Revision:
3:8ed2cd310fa7
Parent:
2:4e0ed7dc6420 
Just test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 2:4e0ed7dc6420 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
screamer 2:4e0ed7dc6420 2 *
screamer 2:4e0ed7dc6420 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
screamer 2:4e0ed7dc6420 4 * and associated documentation files (the "Software"), to deal in the Software without
screamer 2:4e0ed7dc6420 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
screamer 2:4e0ed7dc6420 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
screamer 2:4e0ed7dc6420 7 * Software is furnished to do so, subject to the following conditions:
screamer 2:4e0ed7dc6420 8 *
screamer 2:4e0ed7dc6420 9 * The above copyright notice and this permission notice shall be included in all copies or
screamer 2:4e0ed7dc6420 10 * substantial portions of the Software.
screamer 2:4e0ed7dc6420 11 *
screamer 2:4e0ed7dc6420 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
screamer 2:4e0ed7dc6420 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
screamer 2:4e0ed7dc6420 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
screamer 2:4e0ed7dc6420 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
screamer 2:4e0ed7dc6420 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
screamer 2:4e0ed7dc6420 17 */
screamer 2:4e0ed7dc6420 18
screamer 0:4a0b425b71ff 19 #include "mbed.h"
screamer 0:4a0b425b71ff 20 #include "freetronicsLCDShield.h"
screamer 0:4a0b425b71ff 21
jirik09 3:8ed2cd310fa7 22 Serial pc(SERIAL_TX, SERIAL_RX);
jirik09 3:8ed2cd310fa7 23
jirik09 3:8ed2cd310fa7 24 DigitalOut myled(LED1);
jirik09 3:8ed2cd310fa7 25 AnalogIn analog_value(A0);
screamer 0:4a0b425b71ff 26
jirik09 3:8ed2cd310fa7 27 #define MV(x) ((0xFFF*x)/3300)
jirik09 3:8ed2cd310fa7 28 #define V25 1.398
jirik09 3:8ed2cd310fa7 29 #define SLOPE 0.0043
jirik09 3:8ed2cd310fa7 30
jirik09 3:8ed2cd310fa7 31 int main()
jirik09 3:8ed2cd310fa7 32 {
jirik09 3:8ed2cd310fa7 33 wait(0.1);
jirik09 3:8ed2cd310fa7 34
jirik09 3:8ed2cd310fa7 35 freetronicsLCDShield lcd(D6, D7, D2, D3, D4, D5, D8, A1);
screamer 0:4a0b425b71ff 36 // turn on the back light (it's off by default)
screamer 0:4a0b425b71ff 37 lcd.setBackLight(true);
jirik09 3:8ed2cd310fa7 38
jirik09 3:8ed2cd310fa7 39
jirik09 3:8ed2cd310fa7 40
jirik09 3:8ed2cd310fa7 41
jirik09 3:8ed2cd310fa7 42
jirik09 3:8ed2cd310fa7 43
screamer 0:4a0b425b71ff 44
screamer 0:4a0b425b71ff 45 // print the first line and wait 3 sec
jirik09 3:8ed2cd310fa7 46 lcd.cls();
jirik09 3:8ed2cd310fa7 47
jirik09 3:8ed2cd310fa7 48 int i = 1;
jirik09 3:8ed2cd310fa7 49 float meas=0;
jirik09 3:8ed2cd310fa7 50 float LP=0.025;
jirik09 3:8ed2cd310fa7 51 float LPT=0.0025;
jirik09 3:8ed2cd310fa7 52 float temp=0;
jirik09 3:8ed2cd310fa7 53 lcd.setCursorPosition(0, 0);
jirik09 3:8ed2cd310fa7 54 lcd.printf("Napeti");
jirik09 3:8ed2cd310fa7 55 ADC1->CR2|=ADC_CR2_TSVREFE;
jirik09 3:8ed2cd310fa7 56 while(1) {
jirik09 3:8ed2cd310fa7 57 meas = LP*analog_value.read()+(1-LP)*meas; // Converts and read the analog input value
jirik09 3:8ed2cd310fa7 58
jirik09 3:8ed2cd310fa7 59 ADC_RegularChannelConfig(ADC1, 16, 1, ADC_SampleTime_7Cycles5);
screamer 0:4a0b425b71ff 60
jirik09 3:8ed2cd310fa7 61 //// Temperature (in °C) = {(V25 - VSENSE) / Avg_Slope} + 25.
jirik09 3:8ed2cd310fa7 62 //v25 = 1.43
jirik09 3:8ed2cd310fa7 63 //avg_slope 4.3mv/c
jirik09 3:8ed2cd310fa7 64
jirik09 3:8ed2cd310fa7 65 ADC_SoftwareStartConvCmd(ADC1, ENABLE); // Start conversion
jirik09 3:8ed2cd310fa7 66
jirik09 3:8ed2cd310fa7 67 while (ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC) == RESET); // Wait end of conversion
jirik09 3:8ed2cd310fa7 68
jirik09 3:8ed2cd310fa7 69 temp= LPT*((V25-(float)(ADC_GetConversionValue(ADC1))*3.3/4096)/SLOPE+25)+(1-LPT)*temp; // Get conversion value
jirik09 3:8ed2cd310fa7 70
jirik09 3:8ed2cd310fa7 71
jirik09 3:8ed2cd310fa7 72 if(meas > 0.5) { // If the value is greater than 1000 mV toggle the LED
jirik09 3:8ed2cd310fa7 73 myled = 1;
jirik09 3:8ed2cd310fa7 74 } else {
jirik09 3:8ed2cd310fa7 75 myled = 0;
jirik09 3:8ed2cd310fa7 76 }
jirik09 3:8ed2cd310fa7 77 i++;
jirik09 3:8ed2cd310fa7 78 if(i==200) {
jirik09 3:8ed2cd310fa7 79 i=0;
jirik09 3:8ed2cd310fa7 80 lcd.setCursorPosition(0, 0);
jirik09 3:8ed2cd310fa7 81 lcd.printf("%2.2f C ", temp);
jirik09 3:8ed2cd310fa7 82 lcd.setCursorPosition(1, 0);
jirik09 3:8ed2cd310fa7 83 lcd.printf("%1.4f V", meas*3.3);
jirik09 3:8ed2cd310fa7 84 }
screamer 1:cb23381652eb 85 wait(0.001);
screamer 0:4a0b425b71ff 86 }
screamer 0:4a0b425b71ff 87 }