SYNC problem

[pax]

I have a sync problem with my video experiment shield. I want to make a crosshair on my monitor. input signal signal is a digital cctv camera .
if I set “sync select” to “D9″ and set ” output select” to “SYNC ONLY” and in program if I make inactive initOverlay() comment everything is ok. there is no problem.
but if I set “sync select” to “V INPUT” and set ” output select ” to “OVERLAY” and in program if I make active initOverlay() comment. flickers and slidings are happening.
this is my code

#include 



TVout TV;



void setup()

{

TV.begin(PAL,136,96);

initOverlay();

}



void initOverlay()

{

TCCR1A = 0;

// Enable timer1.  ICES0 is set to 0 for falling edge detection on input capture pin.

TCCR1B = _BV(CS10);



// Enable input capture interrupt

TIMSK1 |= _BV(ICIE1);



// Enable external interrupt INT0 on pin 2 with falling edge.

EIMSK = _BV(INT0);

EICRA = _BV(ISC01);

}

ISR(INT0_vect)

{

display.scanLine = 0;

}



void loop() {



TV.draw_line(68,0,68,95,WHITE);

TV.draw_line(0, 48,135,48,WHITE);



delay(100);

TV.clear_screen();



} 

videos
http://www.youtube.com/watch?v=185lSSEf87I&feature=youtu.be

http://www.youtube.com/watch?v=qD0TjsV5438&feature=youtu.be

[Michael]

Try using TV.delay(100) instead of delay(100). You might also try TV.delay_frame(6) which delays 6 frames which is 1/10 of a second.

[pax]

thanks for your help. there is no sync problem.

[Author]

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