Hotboards MX / Mbed 2 deprecated Hotboards_temp_alarms

Set upper and lower alarms and trhoug pin PB_13 monitor the ALERT signal, turn on/0ff a led when the temperature is below or above the alarm values.

Dependencies:   Hotboards_temp mbed

main.cpp@0:8fcaf7cf5b69, 2016-03-22 (annotated)

Committer:
Hotboards
Date:
Tue Mar 22 21:58:17 2016 +0000
Revision:
0:8fcaf7cf5b69
first release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Hotboards 0:8fcaf7cf5b69 1 /*
Hotboards 0:8fcaf7cf5b69 2 Hotboards temp Library - setting alarms
Hotboards 0:8fcaf7cf5b69 3 Set upper and lower alarms and trhoug pin PB_13 monitor the ALERT signal, turn on a led when the
Hotboards 0:8fcaf7cf5b69 4 temperature is below or above the alarm values.
Hotboards 0:8fcaf7cf5b69 5 The circuit
Hotboards 0:8fcaf7cf5b69 6 * VDD --> 3.3v
Hotboards 0:8fcaf7cf5b69 7 * SDA --> PB_9
Hotboards 0:8fcaf7cf5b69 8 * SCL --> PB_8
Hotboards 0:8fcaf7cf5b69 9 * ALERT --> PB_13
Hotboards 0:8fcaf7cf5b69 10 * GND --> GND
Hotboards 0:8fcaf7cf5b69 11 Library and example created by Diego from Hotboards
Hotboards 0:8fcaf7cf5b69 12 Ported to mbed by Pedro from Hotboards
Hotboards 0:8fcaf7cf5b69 13 This example code is in the public domain.
Hotboards 0:8fcaf7cf5b69 14 */
Hotboards 0:8fcaf7cf5b69 15 #include "mbed.h"
Hotboards 0:8fcaf7cf5b69 16 #include "Hotboards_temp.h"
Hotboards 0:8fcaf7cf5b69 17
Hotboards 0:8fcaf7cf5b69 18 // input pin for reading the alert signal
Hotboards 0:8fcaf7cf5b69 19 DigitalIn Alert(PB_13);
Hotboards 0:8fcaf7cf5b69 20 // Onboard led
Hotboards 0:8fcaf7cf5b69 21 DigitalOut myLed( LED1 );
Hotboards 0:8fcaf7cf5b69 22 //new serial port instance
Hotboards 0:8fcaf7cf5b69 23 Serial pc(USBTX, USBRX);
Hotboards 0:8fcaf7cf5b69 24 //I2C bus instance for the library
Hotboards 0:8fcaf7cf5b69 25 I2C device( I2C_SDA, I2C_SCL );
Hotboards 0:8fcaf7cf5b69 26 // instance a sensor with address number 7 (none of the jumpers on the board is short circuited)
Hotboards 0:8fcaf7cf5b69 27 // and also 0.5 celsius degrees resolution
Hotboards 0:8fcaf7cf5b69 28 Hotboards_temp sensor( device, Sensor_7);
Hotboards 0:8fcaf7cf5b69 29
Hotboards 0:8fcaf7cf5b69 30
Hotboards 0:8fcaf7cf5b69 31
Hotboards 0:8fcaf7cf5b69 32 int main( void )
Hotboards 0:8fcaf7cf5b69 33 {
Hotboards 0:8fcaf7cf5b69 34
Hotboards 0:8fcaf7cf5b69 35 // init sensor
Hotboards 0:8fcaf7cf5b69 36 sensor.init();
Hotboards 0:8fcaf7cf5b69 37 // set lower alarm to 0.0 C and upper alarm to 26.0 C. We assume the eviromental temp is around
Hotboards 0:8fcaf7cf5b69 38 // 23-32 degrees
Hotboards 0:8fcaf7cf5b69 39 sensor.setAlarms( 0.0, 30.0 );
Hotboards 0:8fcaf7cf5b69 40
Hotboards 0:8fcaf7cf5b69 41 while(1)
Hotboards 0:8fcaf7cf5b69 42 {
Hotboards 0:8fcaf7cf5b69 43 // sense the ALERT signal and turn on/off the led on your Nucleo board
Hotboards 0:8fcaf7cf5b69 44 if(Alert == 0)
Hotboards 0:8fcaf7cf5b69 45 {
Hotboards 0:8fcaf7cf5b69 46 myLed = 1;
Hotboards 0:8fcaf7cf5b69 47 }
Hotboards 0:8fcaf7cf5b69 48 else
Hotboards 0:8fcaf7cf5b69 49 {
Hotboards 0:8fcaf7cf5b69 50 myLed =0;
Hotboards 0:8fcaf7cf5b69 51 }
Hotboards 0:8fcaf7cf5b69 52
Hotboards 0:8fcaf7cf5b69 53 // read temperature in celcius degrees
Hotboards 0:8fcaf7cf5b69 54 float temp = sensor.read();
Hotboards 0:8fcaf7cf5b69 55 // print it on the serial port
Hotboards 0:8fcaf7cf5b69 56 pc.printf("Temp sensor 1: %3.1f C\r\n",temp);
Hotboards 0:8fcaf7cf5b69 57 // take the next value after 2 sec (just to not read too often)
Hotboards 0:8fcaf7cf5b69 58 wait(2);
Hotboards 0:8fcaf7cf5b69 59 }
Hotboards 0:8fcaf7cf5b69 60 }