Dr_Doggy
Well-Known Member
unfortuneately due to the HD failure, my responses for this post were lost, so here i am, and with my new 1881 vsync chip and uC,
i was able to get that line much straighter using the help from this guy:
http://www.garydion.com/projects/videoverlay/
i was also able to narrow that line to a dot, when i found the "page sync" on the 1881 aswell
however i read the wiki and do not understand what they are saying about harmonic frequencies to get color, are they saying that frame 1 is red, frame2 is green and frame3 is blue?
i am also having a problem on the pic side, where i am using:
latb1=1; black on screen
....
latb1=1; black on screen
latb1=0; white on screen //to get my white line
latb1=1;black on screen
however each single instruction is taking 100ns on the scope, i even got a 13mhz external clock, and changed OSC to HSPLL, since that was the only one to work, but is this right, and maybe i am missing other instructions?>if that single instruction takes so long i wont have time to bit bang any data, how do i get this clock speed faster, this is my first external clock, now using the 18F1230... how should i approach this??
right now i am thinking counters, shift registers, and fast external parallel eeproms??
i was able to get that line much straighter using the help from this guy:
http://www.garydion.com/projects/videoverlay/
i was also able to narrow that line to a dot, when i found the "page sync" on the 1881 aswell
however i read the wiki and do not understand what they are saying about harmonic frequencies to get color, are they saying that frame 1 is red, frame2 is green and frame3 is blue?
i am also having a problem on the pic side, where i am using:
latb1=1; black on screen
....
latb1=1; black on screen
latb1=0; white on screen //to get my white line
latb1=1;black on screen
however each single instruction is taking 100ns on the scope, i even got a 13mhz external clock, and changed OSC to HSPLL, since that was the only one to work, but is this right, and maybe i am missing other instructions?>if that single instruction takes so long i wont have time to bit bang any data, how do i get this clock speed faster, this is my first external clock, now using the 18F1230... how should i approach this??
right now i am thinking counters, shift registers, and fast external parallel eeproms??
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