synch the camera trigger with the signal in phase and quadrature (every frame or every N frames). We can also simulate the product by the in-phase signal (with a small arbitrary phase difference)
main.cpp
- Committer:
- mbedalvaro
- Date:
- 2014-07-14
- Revision:
- 0:4b5874bff9bb
- Child:
- 1:4284f27d638d
File content as of revision 0:4b5874bff9bb:
#include "mbed.h" #include "Flipper.h" // 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; unsigned long EXPOSURE_TIME=EXPOSURE_TIME_FACTOR*CAMERA_TRIGGER_PERIOD; 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; unsigned long LED_PERIOD=1000000.0/(NB_CYCLES_PER_CAMERA_FRAME*CAMERA_FPS); //in us 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); Flipper ledSource(ledPin, LED_PERIOD); Shutter lcdShutter(shutterPin, LED_PERIOD); Serial pc(USBTX, USBRX); // tx, rx void processSerial(); int main() { pc.baud(9600); cameraTrigger.setQPToggleFrames(NB_FRAMES_TOGGLE_QP); cameraTrigger.start(); ledSource.start(); // add some delay: wait_us(5000); lcdShutter.mixSignal(false); lcdShutter.start(); // spin in a main loop. flipper will interrupt it to call flip while(1) { processSerial(); } } // String to store ALPHANUMERIC DATA (i.e., integers, floating point numbers, unsigned ints, etc represented as DEC) sent wirelessly: char incomingValue[5]; char incomingByte; char indexString=0; void processSerial() { while(pc.readable()>0) { char incomingByte =pc.getc(); if (incomingByte >='0' && incomingByte <='9') { incomingValue[indexString]=incomingByte; indexString++; } else { // check for terminator (i.e. "CONTROL CODES"): if (incomingByte=='P') { currentSignalMode=PHASE; cameraTrigger.toggleQP(false); ledSource.flip(); } else if (incomingByte=='Q') { currentSignalMode=QUADRATURE; cameraTrigger.toggleQP(false); ledSource.flip(); } else if (incomingByte=='T') { currentSignalMode=TOGGLE_PHASE_QUADRATURE; // periodic toogling (every a TOGGLE_QP_PERIOD) cameraTrigger.toggleQP(true); } else if (incomingByte=='s') { // simulated shutter OFF lcdShutter.mixSignal(false); } else if (incomingByte=='S') { // simulated shutter ON lcdShutter.mixSignal(true); // CAMERA PARAMETERS: } else if (incomingByte == 'F') { // camera frame rate incomingValue[indexString]=0; // termination for the string indexString=0; cameraTrigger.setFrameRate(atoi(incomingValue)); } else if (incomingByte == 'E') { // control Exposure time: incomingValue[indexString]=0; // termination for the string indexString=0; cameraTrigger.setExposure(atoi(incomingValue)); } } } }