Diff: light_sensor.cpp

Revision:

12:1d544cdab2cf

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/light_sensor.cpp	Mon May 15 18:30:20 2017 +0000
@@ -0,0 +1,48 @@
+/*
+ * Light sensor operations
+ */
+#include "mbed.h"
+#include "rtos.h"
+#include "main.h"
+#include "light_sensor.h"
+
+AnalogIn LDR(A5);
+
+uint32_t light_init(void const *args)
+{
+    return 1;
+}
+void light_thread(void const *args)
+{
+//DEBUG
+    mutexPCComm.lock();
+    pc.printf("LDR: thread init\n");
+    mutexPCComm.unlock();
+    float lightCurr;
+    int8_t error = 0;
+    int8_t attempts=0;
+    while(true) {
+        Thread::signal_wait(0x1);
+        mutexPCComm.lock();
+        pc.printf("LDR: loop\n");
+        mutexPCComm.unlock();
+        error = -1;
+        attempts=0;
+        while(error!=0 && attempts<MAX_READ_ATTEMPTS_LIGHT && sensors_running == true) {
+            lightCurr=LDR.read();
+            error = 0;
+            if(error==0) {
+                mutexData.lock();
+                data.light = lightCurr;
+                data.lightError = 0;
+                mutexData.unlock();
+            } else {
+                mutexData.lock();
+                data.lightError = 0;
+                mutexData.unlock();
+                attempts++;
+                Thread::wait(3000);
+            }
+        } // while read attempts
+    } // main thread while
+} // thread function