Before I re-invent the wheel, has anyone written code for this device?
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Before I re-invent the wheel, has anyone written code for this device?
The unit use a STV5730A OSD chip, which has not been made for a number of years, though there are still odd stocks around, so for a hobbyist it is Ok but not for use commercially.
The STV chip works well, it uses its own version of shift in, so their interface board does the translation, so it should be OK.
Actually the old OSD-232 had this chip. The newer OSD-232+ uses a MAX7456, 18F4520, and Max 3224.
Best, Ed
Hi Ed,
Seems a bit like making Model T engines . . . NTSC is pretty much a dead player now, maybe time to go digital.
You are right Joe and I have too much built around Never Twice the Same Color (NTSC). I have a periscope camera, transmitter, and I know NTSC the best. To convert to all digital would be a major expense. My periscope camera is called a "snake camera" which is very tiny, less than 1/2" square! Then there are all the specialized optics as the periscope uses 3 mm lenses!
Just as an update for anyone else who may wish to know. Turns out that the DB-9 that you use you must send data out on pin-3 as pin 13 of the OSD wants to see the data from the PIC. Most cables are wired straight pin to pin (pin-2 to pin-2 etc.)
This code works for a baud rate of 19,200.
Include "modedefs.bas" ' Mode definitions for Serout
Define OSC 10
num1 var word
num2 VAR WORD
num1 = 1000 ' start with 1000
num2 = 2000 ' start with 2000
serout2 PORTB.2, 32, [$E3]
' CLEAR THE SCREEN
PAUSE 500
mainloop:
serout2 PORTB.2, 32, [$E5,$02,$01]
'positions the cursor to row 2 columb 1
serout2 PORTB.2, 32, [$41,$00,#num1,$00,$00,$42,$00,#num2]
'gives an A 2 spaces the number then a B and the second number
Pause 500 ' Wait .5 second
Goto mainloop ' Do it forever
End