NTSC Video...Multiple RCA Outputs...Problems -- [RESOLVED]
CassLan
Posts: 586
Hello all,
I had some boards made from GoldPhoenix, so far the only mistakes have been mine...luckily nothing too drastic.
On this board I have 2 Video outs, I had extra pins left on the prop and just decided to add it in for some future use...
Attached is the Schematic..using the TVText object I figure I should be able to choose which video port feeds video right?
Well I have had no luck...
Produces the same result as
Which is a great crisp video signal on RCA Port 1, and no video on Port 2.
I haven't even tried doing 2 instances of TVText (one on each port) which if I ever need the 2 ports it will be for something like that.
I have checked with a meter and the board is accurate to the schematic.
Out of curiosity/desparation I have tried using basepin's 5,6 as well..both have the same result as above.
Any ideas on what may be going on would be helpful.
Thanks,
Rick
Post Edited (CassLan) : 6/19/2009 12:06:06 PM GMT
I had some boards made from GoldPhoenix, so far the only mistakes have been mine...luckily nothing too drastic.
On this board I have 2 Video outs, I had extra pins left on the prop and just decided to add it in for some future use...
Attached is the Schematic..using the TVText object I figure I should be able to choose which video port feeds video right?
Well I have had no luck...
TVText.Start(4)
Produces the same result as
TVText.Start(7)
Which is a great crisp video signal on RCA Port 1, and no video on Port 2.
I haven't even tried doing 2 instances of TVText (one on each port) which if I ever need the 2 ports it will be for something like that.
I have checked with a meter and the board is accurate to the schematic.
Out of curiosity/desparation I have tried using basepin's 5,6 as well..both have the same result as above.
Any ideas on what may be going on would be helpful.
Thanks,
Rick
Post Edited (CassLan) : 6/19/2009 12:06:06 PM GMT
834 x 426 - 35K
Comments
2: Spin Language Reference – VCFG
Propeller Manual v1.1 · Page 215
I have never realized that there were any pin constrictions on outputting video, but it seems that you have to choose between 4 pin blocks..so your basepins for NTSC video must be 0,4,8,12,16...etc
I feel lucky not having known that fact that one of the rca ports lines up with that specification.
I was under the impression that the pins had to be in order and thats it....live and learn.
Thanks.
Rick
Did you connect the right resistor to the right pin? 1.1k to P4, 560 to P5 and 270 to P6?
The resistors are correct, and the video produced on port 1 is great (good colors, good synch..etc).
I guess Port2 will become a sound port [noparse]:)[/noparse]
Rick