Diff: main.cpp

Revision:

1:4284f27d638d

Parent:

0:4b5874bff9bb

--- a/main.cpp	Mon Jul 14 09:35:12 2014 +0000
+++ b/main.cpp	Mon Dec 08 07:03:38 2014 +0000
@@ -4,22 +4,27 @@
 // The following parameters can be changed by serial commands:
 // NOTE: program 9 on the LCC-230 gives a freq of 150Hz. If frame rate for the camera is 30fps, then the nb of cycles per frame is 150/30=5
 // for 28.09, then the of cycles per frame is 150/28.09=5.339
-float CAMERA_FPS=15;//28.0915;//28.09;
-unsigned long CAMERA_TRIGGER_PERIOD=1000000.0/CAMERA_FPS;
-float EXPOSURE_TIME_FACTOR=1.0/4;
+float CAMERA_FPS=58.75;//28.0915;//28.09;
+unsigned long CAMERA_TRIGGER_PERIOD=1000000.0/CAMERA_FPS; // it is recommendable that this division gives an integer!
+float EXPOSURE_TIME_FACTOR=1.0/3;
 unsigned long EXPOSURE_TIME=EXPOSURE_TIME_FACTOR*CAMERA_TRIGGER_PERIOD;
+unsigned long WAITING_TIME=CAMERA_TRIGGER_PERIOD-EXPOSURE_TIME;
 
-float NB_CYCLES_PER_EXPOSURE_TIME=4;//5.339;//1;//1.0*150/28; // this is the nb of cycles of the led during one camera frame
-float NB_CYCLES_PER_CAMERA_FRAME=1.0/EXPOSURE_TIME_FACTOR*NB_CYCLES_PER_EXPOSURE_TIME;
+// NOTE: since the delays (waiting time and exposure time) are in microseconds, we NEED to have an integer number of cycles per CAMERA frame...
+// (no pb if there is not an integer INSIDE the exposure time, but better to have it). Hence the "approximate" value:
+float approximate_NbCylclesExposureTime=6;
+unsigned long NB_CYCLES_PER_CAMERA_FRAME=1.0*approximate_NbCylclesExposureTime/EXPOSURE_TIME_FACTOR;
 
 unsigned long LED_PERIOD=1000000.0/(NB_CYCLES_PER_CAMERA_FRAME*CAMERA_FPS); //in us
+// NOTE: there is no warangy this division will be integer! PLUS it must be a multiple of 2!! mmm...
 
 unsigned int NB_FRAMES_TOGGLE_QP=1; // this is the nb of camera frames before toggling the modulation (note: there is no synchronization!)
 
 enum SignalMode {PHASE=0, QUADRATURE, TOGGLE_PHASE_QUADRATURE};
 SignalMode currentSignalMode=TOGGLE_PHASE_QUADRATURE; //NOTE: all the leds mode affected by this at the same time
 
-Trigger cameraTrigger(cameraTriggerPin,1.0*CAMERA_FPS,(unsigned int)EXPOSURE_TIME);
+//Trigger cameraTrigger(cameraTriggerPin,1.0*CAMERA_FPS,(unsigned int)EXPOSURE_TIME);
+Trigger cameraTrigger(cameraTriggerPin,(unsigned int)WAITING_TIME-27,(unsigned int)EXPOSURE_TIME);
 Flipper ledSource(ledPin, LED_PERIOD);
 Shutter lcdShutter(shutterPin, LED_PERIOD);
 
@@ -36,9 +41,9 @@
     
     ledSource.start();
     
-    // add some delay:
-    wait_us(5000);
-    lcdShutter.mixSignal(false);
+    // add some delay?
+   // wait_us(100);
+    lcdShutter.mixSignal(true);
     lcdShutter.start();
 
     // spin in a main loop. flipper will interrupt it to call flip
@@ -87,6 +92,15 @@
                 incomingValue[indexString]=0; // termination for the string
                 indexString=0;
                 cameraTrigger.setExposure(atoi(incomingValue));
+            } else if (incomingByte == 'L') { // get the LED PERIOD (to adjust the real LCD shutter)
+               // incomingValue[indexString]=0; // termination for the string
+               // indexString=0;
+                pc.printf("\n\nCAMERA FPS: %f fps\n", CAMERA_FPS);
+                pc.printf("CAMERA TRIGGER PERIOD: %i us\n", CAMERA_TRIGGER_PERIOD);
+                pc.printf("EXPOSURE TIME: %i us\n", EXPOSURE_TIME);
+                pc.printf("\nLED PERIOD: %i us\n", LED_PERIOD);
+                pc.printf("LED FREQ: %f Hz\n", 1.0/LED_PERIOD*1000000);
+                pc.printf("TOGGLE QP every: %i frames\n", NB_FRAMES_TOGGLE_QP);
             }
             
         }