Diff: temp_hum_sensor.cpp

Revision:

9:5e9c4277151d

Child:

10:f14f47225091

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/temp_hum_sensor.cpp	Mon May 08 07:20:54 2017 +0000
@@ -0,0 +1,76 @@
+/*
+ * Temperature & hummidity sensor operations
+ */
+#include "mbed.h"
+#include "rtos.h"
+
+#include "main.h"
+#include "temp_hum_sensor.h"
+#include "DHT.h"
+
+static DHT DHTSensor(D6, DHT11);
+static DigitalOut  DHTEnable(D7);
+static float tempCurr, humCurr, dewPCurr;
+uint32_t temp_hum_init(void const *args)
+{
+
+    return 1;
+}
+void temp_hum_thread(void const *args)
+{
+//DEBUG
+    mutexPCComm.lock();
+    pc.printf("SENSOR: thread init\n");
+    mutexPCComm.unlock();
+    int8_t error = 0;
+    int8_t attempts=0;
+    while(true) {
+        Thread::signal_wait(0);
+        mutexPCComm.lock();
+        pc.printf("SENSOR: loop\n");
+        mutexPCComm.unlock();
+        error = -1;
+        attempts=0;
+        while(error!=0 && attempts<MAX_READ_ATTEMPTS_TEMP_HUM && sensors_running == true) {
+            error = DHTread();
+            if(error==0) {
+                mutexData.lock();
+                data.temperature = tempCurr;
+                data.humidity = humCurr;
+                data.dewPoint = dewPCurr;
+                data.DHTError = 0;
+                mutexData.unlock();
+            } else {
+                mutexData.lock();
+                data.DHTError = error;
+                mutexData.unlock();
+                attempts++;
+                Thread::wait(3000);
+                /* //DEBUG
+                mutexPCComm.lock();
+                printf("DHTError: %d\n", DHTError);
+                mutexPCComm.unlock();
+                */
+            }
+            // DEBUG
+            mutexPCComm.lock();
+            printf("DHTError: attempt %d\n", attempts);
+            mutexPCComm.unlock();
+        } // while read attempts
+    } // main thread while
+} // thread function
+
+int DHTread(void)
+{
+    int error = 0;
+    DHTEnable = 1;
+    Thread::wait(1000);
+    error = DHTSensor.readData();
+    if (error == 0) {
+        tempCurr = DHTSensor.ReadTemperature(CELCIUS);
+        humCurr = DHTSensor.ReadHumidity();
+        dewPCurr = DHTSensor.CalcdewPoint(tempCurr, humCurr);
+    }
+    DHTEnable=0;
+    return error;
+}
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