Valentín Salinas / Mbed 2 deprecated meteo_station

SEDO subject project

Dependencies:   ds3231 mbed-rtos mbed DHT

temp_hum_sensor.cpp@9:5e9c4277151d, 2017-05-08 (annotated)

Committer:
ValenSalLop
Date:
Mon May 08 07:20:54 2017 +0000
Revision:
9:5e9c4277151d
Child:
10:f14f47225091
RTOS used

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ValenSalLop 9:5e9c4277151d 1 /*
ValenSalLop 9:5e9c4277151d 2 * Temperature & hummidity sensor operations
ValenSalLop 9:5e9c4277151d 3 */
ValenSalLop 9:5e9c4277151d 4 #include "mbed.h"
ValenSalLop 9:5e9c4277151d 5 #include "rtos.h"
ValenSalLop 9:5e9c4277151d 6
ValenSalLop 9:5e9c4277151d 7 #include "main.h"
ValenSalLop 9:5e9c4277151d 8 #include "temp_hum_sensor.h"
ValenSalLop 9:5e9c4277151d 9 #include "DHT.h"
ValenSalLop 9:5e9c4277151d 10
ValenSalLop 9:5e9c4277151d 11 static DHT DHTSensor(D6, DHT11);
ValenSalLop 9:5e9c4277151d 12 static DigitalOut DHTEnable(D7);
ValenSalLop 9:5e9c4277151d 13 static float tempCurr, humCurr, dewPCurr;
ValenSalLop 9:5e9c4277151d 14 uint32_t temp_hum_init(void const *args)
ValenSalLop 9:5e9c4277151d 15 {
ValenSalLop 9:5e9c4277151d 16
ValenSalLop 9:5e9c4277151d 17 return 1;
ValenSalLop 9:5e9c4277151d 18 }
ValenSalLop 9:5e9c4277151d 19 void temp_hum_thread(void const *args)
ValenSalLop 9:5e9c4277151d 20 {
ValenSalLop 9:5e9c4277151d 21 //DEBUG
ValenSalLop 9:5e9c4277151d 22 mutexPCComm.lock();
ValenSalLop 9:5e9c4277151d 23 pc.printf("SENSOR: thread init\n");
ValenSalLop 9:5e9c4277151d 24 mutexPCComm.unlock();
ValenSalLop 9:5e9c4277151d 25 int8_t error = 0;
ValenSalLop 9:5e9c4277151d 26 int8_t attempts=0;
ValenSalLop 9:5e9c4277151d 27 while(true) {
ValenSalLop 9:5e9c4277151d 28 Thread::signal_wait(0);
ValenSalLop 9:5e9c4277151d 29 mutexPCComm.lock();
ValenSalLop 9:5e9c4277151d 30 pc.printf("SENSOR: loop\n");
ValenSalLop 9:5e9c4277151d 31 mutexPCComm.unlock();
ValenSalLop 9:5e9c4277151d 32 error = -1;
ValenSalLop 9:5e9c4277151d 33 attempts=0;
ValenSalLop 9:5e9c4277151d 34 while(error!=0 && attempts<MAX_READ_ATTEMPTS_TEMP_HUM && sensors_running == true) {
ValenSalLop 9:5e9c4277151d 35 error = DHTread();
ValenSalLop 9:5e9c4277151d 36 if(error==0) {
ValenSalLop 9:5e9c4277151d 37 mutexData.lock();
ValenSalLop 9:5e9c4277151d 38 data.temperature = tempCurr;
ValenSalLop 9:5e9c4277151d 39 data.humidity = humCurr;
ValenSalLop 9:5e9c4277151d 40 data.dewPoint = dewPCurr;
ValenSalLop 9:5e9c4277151d 41 data.DHTError = 0;
ValenSalLop 9:5e9c4277151d 42 mutexData.unlock();
ValenSalLop 9:5e9c4277151d 43 } else {
ValenSalLop 9:5e9c4277151d 44 mutexData.lock();
ValenSalLop 9:5e9c4277151d 45 data.DHTError = error;
ValenSalLop 9:5e9c4277151d 46 mutexData.unlock();
ValenSalLop 9:5e9c4277151d 47 attempts++;
ValenSalLop 9:5e9c4277151d 48 Thread::wait(3000);
ValenSalLop 9:5e9c4277151d 49 /* //DEBUG
ValenSalLop 9:5e9c4277151d 50 mutexPCComm.lock();
ValenSalLop 9:5e9c4277151d 51 printf("DHTError: %d\n", DHTError);
ValenSalLop 9:5e9c4277151d 52 mutexPCComm.unlock();
ValenSalLop 9:5e9c4277151d 53 */
ValenSalLop 9:5e9c4277151d 54 }
ValenSalLop 9:5e9c4277151d 55 // DEBUG
ValenSalLop 9:5e9c4277151d 56 mutexPCComm.lock();
ValenSalLop 9:5e9c4277151d 57 printf("DHTError: attempt %d\n", attempts);
ValenSalLop 9:5e9c4277151d 58 mutexPCComm.unlock();
ValenSalLop 9:5e9c4277151d 59 } // while read attempts
ValenSalLop 9:5e9c4277151d 60 } // main thread while
ValenSalLop 9:5e9c4277151d 61 } // thread function
ValenSalLop 9:5e9c4277151d 62
ValenSalLop 9:5e9c4277151d 63 int DHTread(void)
ValenSalLop 9:5e9c4277151d 64 {
ValenSalLop 9:5e9c4277151d 65 int error = 0;
ValenSalLop 9:5e9c4277151d 66 DHTEnable = 1;
ValenSalLop 9:5e9c4277151d 67 Thread::wait(1000);
ValenSalLop 9:5e9c4277151d 68 error = DHTSensor.readData();
ValenSalLop 9:5e9c4277151d 69 if (error == 0) {
ValenSalLop 9:5e9c4277151d 70 tempCurr = DHTSensor.ReadTemperature(CELCIUS);
ValenSalLop 9:5e9c4277151d 71 humCurr = DHTSensor.ReadHumidity();
ValenSalLop 9:5e9c4277151d 72 dewPCurr = DHTSensor.CalcdewPoint(tempCurr, humCurr);
ValenSalLop 9:5e9c4277151d 73 }
ValenSalLop 9:5e9c4277151d 74 DHTEnable=0;
ValenSalLop 9:5e9c4277151d 75 return error;
ValenSalLop 9:5e9c4277151d 76 }