Diff: main.cpp

Revision:

0:8080080b83cf

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Aug 12 13:29:07 2019 +0000
@@ -0,0 +1,82 @@
+#include "mbed.h"
+#include "IIR_filter.h"
+
+/*  Notes pmic 07.08.2019:
+  - ...
+*/
+
+AnalogIn dist(PC_4);                      // analog IN (acc x) on PA_0
+float d = 0.0f;
+
+Serial pc(SERIAL_TX, SERIAL_RX);  // serial connection via USB - programmer
+InterruptIn Button(USER_BUTTON);  // User Button
+Ticker  LoopTimer;                // interrupt for control loop
+Timer t;                          // timer to analyse Button
+
+int   k;
+bool  doRun = false;
+float Ts = 0.05f;                 // sample time of main loop, 50 Hz
+
+IIR_filter pt1(0.5f, Ts, 1.0f);
+float df = 0.0f;
+
+// user defined functions
+void updateLoop(void);   // loop (via interrupt)
+void pressed(void);      // user Button pressed
+void released(void);     // user Button released
+
+// main program and control loop
+// -----------------------------------------------------------------------------
+int main()
+{
+    pc.baud(2000000);                  // for serial comm.
+    LoopTimer.attach(&updateLoop, Ts); // attach loop to timer interrupt
+    Button.fall(&pressed);             // attach key pressed function
+    Button.rise(&released);            // attach key pressed function
+    k = 0;
+    pt1.reset(0.0f);
+}
+
+// the updateLoop starts as soon as you pressed the blue botton
+void updateLoop(void)
+{
+    // d = usGain*rangefinder() + usOffset;
+    d = dist.read();
+    df = pt1(d);
+    if(doRun) {
+        ///*
+        // use this section to do dynamical measurements
+        if(doRun && k++ < 1600) {
+            pc.printf("%10i %10.9e\r\n", k, d);
+        }
+        //*/
+        /*
+        // use this section to do static measurements
+        if(doRun && k++%25 == 0) {
+            pc.printf("%10i %10.6e\r\n", k, df);
+        }
+        */
+    }
+}
+
+// buttonhandling
+// -----------------------------------------------------------------------------
+// start timer as soon as button is pressed
+void pressed()
+{
+    t.start();
+}
+
+// evaluating statemachine
+void released()
+{
+    // toggle state over boolean
+    if(doRun) {
+        k = 0;
+        pt1.reset(0.0f);
+    }
+    doRun = !doRun;
+    t.stop();
+    t.reset();
+}
+