ENEL400 / Mbed 2 deprecated Sensors

Code for collecting sensor data

Dependencies:   SX1276Lib_inAir mbed

Fork of Sensors by ENEL400

main.cpp@2:804e04f4f217, 2016-09-01 (annotated)

Committer:
Razorfoot
Date:
Thu Sep 01 08:12:24 2016 +0000
Revision:
2:804e04f4f217
Parent:
1:059293827555 
Door functionality added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Razorfoot 1:059293827555 1 #include <stdio.h>
Razorfoot 0:b4b76706c8c3 2 #include "mbed.h"
Razorfoot 0:b4b76706c8c3 3 #include "sx1276-inAir.h"
Razorfoot 0:b4b76706c8c3 4
Razorfoot 2:804e04f4f217 5 #define STRING_LENGTH 30
Razorfoot 1:059293827555 6 #define SUPPLY_VOLTAGE 3.3
Razorfoot 1:059293827555 7
Razorfoot 0:b4b76706c8c3 8 Serial pc(USBTX, USBRX); //Create a serial connection to the PC
Razorfoot 0:b4b76706c8c3 9 AnalogIn ain(PA_0); //Configure pin PA0 as an analog input for the temperature sensor
Razorfoot 2:804e04f4f217 10 //DigitalIn din(PB_10); //Configure pin PC2 as a digital input for the reed switch
Razorfoot 2:804e04f4f217 11 InterruptIn door(PB_10);
Razorfoot 0:b4b76706c8c3 12
Razorfoot 0:b4b76706c8c3 13 float reading_float;
Razorfoot 2:804e04f4f217 14 bool reading_bool;
Razorfoot 0:b4b76706c8c3 15
Razorfoot 0:b4b76706c8c3 16 //Return the temperature from the sensor, in degrees celsius
Razorfoot 2:804e04f4f217 17 float getTemp() {
Razorfoot 0:b4b76706c8c3 18 float reading = ain.read();
Razorfoot 0:b4b76706c8c3 19 float output_voltage = reading * SUPPLY_VOLTAGE;
Razorfoot 0:b4b76706c8c3 20 return (output_voltage - 0.25) / 0.028;
Razorfoot 0:b4b76706c8c3 21 }
Razorfoot 0:b4b76706c8c3 22
Razorfoot 2:804e04f4f217 23 //Return the door state. If True, the door is closed. If False, the door is open.
Razorfoot 2:804e04f4f217 24 bool getDoorState() {
Razorfoot 2:804e04f4f217 25 return door.read();
Razorfoot 2:804e04f4f217 26 }
Razorfoot 2:804e04f4f217 27
Razorfoot 2:804e04f4f217 28 //Code that executes on a rising edge
Razorfoot 2:804e04f4f217 29 //For reasons unknown, this executes twice instead of once when the magnet connects
Razorfoot 2:804e04f4f217 30 //i.e. there are two falling edges. Could implement debouncing, but that takes effort
Razorfoot 2:804e04f4f217 31 void transmitDoorClosing() {
Razorfoot 2:804e04f4f217 32 printf("The door has been closed\r\n");
Razorfoot 2:804e04f4f217 33 }
Razorfoot 2:804e04f4f217 34
Razorfoot 2:804e04f4f217 35 //Code that executes on a falling edge
Razorfoot 2:804e04f4f217 36 void transmitDoorOpening() {
Razorfoot 2:804e04f4f217 37 printf("The door has been opened\r\n");
Razorfoot 2:804e04f4f217 38 }
Razorfoot 2:804e04f4f217 39
Razorfoot 0:b4b76706c8c3 40
Razorfoot 0:b4b76706c8c3 41 int main() {
Razorfoot 0:b4b76706c8c3 42
Razorfoot 0:b4b76706c8c3 43 //Configure the serial connection (baud rate = 19200, 8 data bits, 1 stop bit)
Razorfoot 0:b4b76706c8c3 44 pc.baud(9600);
Razorfoot 0:b4b76706c8c3 45 pc.format(8, SerialBase::None, 1);
Razorfoot 2:804e04f4f217 46
Razorfoot 2:804e04f4f217 47 door.rise(transmitDoorClosing); //Rising edge occurs when the "door opens"
Razorfoot 2:804e04f4f217 48 door.fall(transmitDoorOpening); //Falling edge occurs when the "door closes"
Razorfoot 0:b4b76706c8c3 49
Razorfoot 0:b4b76706c8c3 50 while(1) {
Razorfoot 0:b4b76706c8c3 51
Razorfoot 2:804e04f4f217 52 char reading_string[STRING_LENGTH];
Razorfoot 2:804e04f4f217 53 reading_float = getTemp();
Razorfoot 2:804e04f4f217 54 sprintf(reading_string, " Temp: %.8f\r\n", reading_float);
Razorfoot 2:804e04f4f217 55 pc.printf("Temperature = %s\r\n", reading_string);
Razorfoot 0:b4b76706c8c3 56
Razorfoot 0:b4b76706c8c3 57 wait_ms(500);
Razorfoot 0:b4b76706c8c3 58
Razorfoot 0:b4b76706c8c3 59 }
Razorfoot 0:b4b76706c8c3 60 }