Diff: main.cpp

Revision:

0:2e15d72bfbcf

Child:

1:22e495480269

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Feb 22 21:51:37 2016 +0000
@@ -0,0 +1,58 @@
+#include "mbed.h"
+#include "telemetry/Telemetry.h"
+
+/*
+    Example of the 'Telemetry' library, a portable communication library for embedded devices.
+    
+    This code shows how you can use the powerful topic adressing of the library
+    to send complex, indexed and sparse data such as arrays, lists, etc. 
+    
+    You can use the Pytelemetry Command Line Interface to open plots, visualize the received data,
+    and communicate with the car.
+    See https://github.com/Overdrivr/pytelemetrycli
+*/
+
+int main()
+{   
+    Telemetry TM(115200);
+    
+    Timer refresh_timer;
+    refresh_timer.start();
+    
+    // The topic under which the array is published
+    char topic [] = "sin:000";
+    
+    // The sent array contains 16 elements
+    // Each element takes the value of a sine function, with a phase difference between each element
+    // In the command-line interface, the generated data will visualize as a moving sine wave
+    
+    // Time for simulating sine function
+    float t = 0;
+        
+    for(;;)
+    {
+        // 10 times per second
+        if(refresh_timer.read_ms() > 100)
+        {
+            refresh_timer.reset();
+            
+            // Compute a 16 points window on a sine function that shifts in time
+            for(uint16_t i = 0 ; i < 16 ; i++)
+            {
+                // Compute sinus of point i
+                float s = sin(2 * 3.14159 * t + i/10.0);
+                
+                // Build the topic
+                // First topic will be 'sin:0'
+                // Second topic will be 'sin:1', etc            
+                sprintf(topic,"sin:%u",i);
+                
+                // Publish sine value at index 'i' to topic 'sin:i'
+                TM.pub_f32(topic,s);
+            }
+            
+            // Move time forward
+            t += 0.005;
+        }
+    }
+}
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