Diff: main.cpp

Revision:

6:898a83da0661

Parent:

4:cdf9641ba817

Child:

7:3f4048c1cc81

--- a/main.cpp	Tue Jun 25 14:20:21 2019 +0000
+++ b/main.cpp	Tue Jun 25 14:51:58 2019 +0000
@@ -1,17 +1,84 @@
 #include "mbed.h"
 #include "HP206C.h"
+#include "IIR_filter.h"
 
-Serial serial(SERIAL_TX, SERIAL_RX);
-HP206C barometer(D14, D15);
+/*  Notes pmic 25.06.2019:
+  - 
+*/
+
+HP206C barometer(D14, D15); // 20 Hz parametrization
 float altitude = 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, 20 Hz
+
+IIR_filter pt1(0.2f, Ts, 1.0f);
+float altitudef = 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()
 {
-    serial.baud(115200);
+    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);
     barometer.reset();
-    while(1) {
-        altitude = barometer();
-        serial.printf("altitude %f\r\n", altitude);
-        wait_ms(20); // don't hammer the serial console
+    wait_us(100);
+}
+
+// the updateLoop starts as soon as you pressed the blue botton
+void updateLoop(void)
+{
+    altitude = barometer();
+    altitudef = pt1(altitude);
+    // pc.printf("%10i %10.6e\r\n", k, altitude);
+    if(doRun) {
+        /*
+        // use this section to do dynamical measurements
+        if(doRun && k++ < 4000) {
+            pc.printf("%10i %10.9e\r\n", k, altitude);
+        }
+        */
+        ///*
+        // use this section to do static measurements
+        if(doRun && k++%25 == 0) {
+            pc.printf("%10i %10.6e\r\n", k, altitudef);
+        }
+        //*/
     }
 }
+
+// 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();
+}
\ No newline at end of file