From: Jon Langseth <jon.langseth@lilug.no>
Date: Sun, 22 Jul 2012 11:51:58 +0000 (+0200)
Subject: Merge branch 'videodetect'
X-Git-Url: https://git.defcon.no/?a=commitdiff_plain;h=bcd052520233e777bc7724f960b23a5ac861b817;p=avrfbosd

Merge branch 'videodetect'
---

bcd052520233e777bc7724f960b23a5ac861b817
diff --cc syncgen/main.c
index 3fa6cea,e67d582..1dbfefb
--- a/syncgen/main.c
+++ b/syncgen/main.c
@@@ -134,19 -128,22 +128,22 @@@ void vsync(uint8_t odd_even
  
  ISR (TIMER0_COMPA_vect) 
  {
- 	if(line == 310) vsync(0);
- 	else if(line == 622) vsync(1);
- 	else
+ 	if(line == 310) vsync(0); // End of ODD fields, start vsync'ing
+ 	else if(line == 622) vsync(1); // End of EVEN, start vsync'ing
+ 	else // In frame. Generate a hsync pulse, then do some drawing :)
  	{
  		hsync();
- 		int t_line = line;
+ 
+ 		int t_line = line; // Reducing line-count complexity by half ;)
  		t_line = ( line > 312 ) ? line - 312 : line;
  
+ 		// Draw the logo-image centered vertically
  		if ( t_line > 118 && t_line < 118 + (2*testimg_height) )
  		{
 -			_delay_us(12);
 +			_delay_us(12.3);
  			asm_render_line();
  
+ 			// Stretch the image vertically by repeating the same line twice
  			if( !stretch )
  			{
  				stretch = 1;