Honza T. / Mbed 2 deprecated EXAMPLE_Nucleo_mbed_RTOS_test_code

Simple test program to get familiar with functionality of MBED RTOS on ST Nucleo-F411RE. Tasks for LED blinking, user button, temperature measurement with DS1620, temperature measurement with internal temperature sensor of ST32F411RE, ultrasonic distance measurement and displaying result on 16x2 TextLCD.

Dependencies:   DS1620_improved TextLCD_improved mbed-rtos mbed

Diff: tsk_dist.cpp

Revision:
15:a627638edd9c
Parent:
13:f62b10a6e1c5
Child:
17:94c385ff2641
--- a/tsk_dist.cpp	Mon Dec 14 19:48:36 2015 +0000
+++ b/tsk_dist.cpp	Mon Dec 14 21:46:45 2015 +0000
@@ -8,10 +8,27 @@
 
 
 static DigitalOut  trigDist(PB_9);
-static DigitalIn   echoDist(PA_6);
+static InterruptIn echoDist(PA_6);
 
 static Timer   timer;
 
+static void rising(void) {
+    timer.start();
+}
+
+static void falling(void) {
+    timer.stop();
+    echoDist.rise(0);
+    echoDist.fall(0);
+
+    dist_data.timerTicks = timer.read_us();
+        
+    // 340 ms-1
+    dist_data.distance = (timer.read()/2.0f - 0.0f)*340.0f*1000.0f;
+
+    // Vynuluj timer
+    timer.reset();
+}
 
 void dist_thread(void const *args) {
     
@@ -25,29 +42,15 @@
             dist_data.timerTicks = 0;
             dist_data.distance = 0.0f;
         } else {
+            // Vynuluj timer
             timer.stop();
             timer.reset();
                 
-            // Cekej na hranu na Echo
-            while (echoDist != 1)
-                ;
-        
-            // Zacni merit cas
-            timer.start();
-        
-            // Cekej na hranu na Echo
-            while (echoDist != 0)
-                ;
-        
-            // Zastav mereni    
-            timer.stop();
-                   
-            dist_data.timerTicks = timer.read_us();
-        
-            // 340 ms-1
-            dist_data.distance = (timer.read()/2.0f - 0.0f)*340.0f*1000.0f;
+            // Cekej na hrany na Echo
+            echoDist.rise(&rising);
+            echoDist.fall(&falling);
         }
         
-        Thread::wait(1000);
+        Thread::wait(500);
     }
 }