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OSD-232

1. 14 Trouble Shooting Tips Problem Green LED off won t power up Screen is unreadable Garbage characters on screen or text not displayed Solution e Check power supply output 8 to 14 VDC e Check polarity of supply to OSD 232 board e If overlay mode then check that the OSD 232 VIDEO IN has a valid video signal e Verify communication 4800 baud jumper installed 2400 baud jumper removed e Last command sent see page 5 might require cursor to be repositioned e Verify common ground shared between Stamp and OSD 232 W arranty amp Service If the product fails to perform as described in our product description or specification within 90 days from the date of shipment to the buyer we will repair or replace the product and or accessories originally supplied Failure due to improper installation misuse abuse or accident is not covered by this warranty Incidental and consequential damages are not covered by this warranty The buyer must obtain a Return Material Authorization by calling 248 524 1918 and shipping the defective product to Intuitive Circuits 2275 Brinston Troy MI 48083 freight prepaid 15 Intuitive Circuits LLC 2275 Brinston Troy MI 48083 Voice 248 524 1918 Fax 248 524 3808 http www icircuits com
2. Below is the chart of the special commands All values are decimal values not ASCII Typing 130 from your favorite terminal program will not clear the screen You just sent three ASCII values 49 51 48 Also note if the reposition column is YES for a specific command then a position command 129 must follow before sending more text Command Value Parameters Reposition Description Set the screen mode 0 overlay mixed with incoming video 1 full screen OSD 232 generated background POSITION NO Set the cursor position x 1 28 y 1 11 CLEAR SCREEN set to 1 1 Clear the entire screen with spaces wait 10 ms after command sent VISIBLE Show or hide text 0 hide text 1 show text TRANSLUCENT Set translucent text overlay mode O off l on BACKGROUND Set background color full screen mode 0 black 1 blue 2 green 3 cyan 4 red 5 magenta 6 yellow 7 white Set character row zoom level row 1 11 horizontal zoom 1 4 vertical zoom 1 4 Note zoom settings for any row 2 10 effect all 9 of them Set character color full screen mode 0 black 1 blue 2 green 3 cyan 4 red 5 magenta 6 yellow 7 white NO Set character blink 0 off l on set to 1 1 Reset OSD 232 to default power up settings wait 10 ms after command sent SET VERTICAL OFFSET Set the text screen vertical position off
3. CON 139 set the text screen horizontal position one parameter offset 1 58 VAR BYTE counter wait for OSD 232 to power up T cN48 cMODE 1 lt make full screen T cN48 cBACKCOLOR cBLACK set screen color to black T cN48 cTEXTVIS 0 hide text while drawing a full screen T cN48 cCLS clear the screen lt wait 10 ms T cN T cN T cN T cN cCHARCOLOR cRED Character Set cCHARCOLOR cWHITE cSETPOS 1 2 set cursor at xpos and ypos 2 48 48 48 48 draw character set for cnt 0 TO 127 serout CSEROUT cN48 cnt next serout cSEROU serout CSEROU serout cSEROU serout cSEROU serout cSEROU serout cSEROU serout cSEROU serout cSEROU end T cN48 T cN48 T cN48 T cN48 T cN48 T cN48 T cN48 T cN48 cCHARCOLOR cGREEN cCHARBLINK 1 cSETPOS 1 11 Blinking green text cCHARBLINK 0 cSETPOS 28 11 95 draw icon cTEXTVIS 1 show text eee ar le re re 13 Character Chart Below is the chart of the 128 displayable on screen characters Each character is 12 x 18 pixels To determine the value of a particular character add the column number to the row number For example the key symbol is column number 48 row number 14 62 0 16 32 48 64 80 96 112 B
4. 0 symbol cBLUE 1 symbol cGREEN 2 symbol cCYAN 3 symbol cRED 4 symbol cMAGENTA 5 symbol cYELLOW 6 symbol cWHITE 7 command constants symbol cMODE 128 overlay or full screen one parameter overlay mode 0 full screen 1 symbol cSETPOS 129 set cursor position 2 parameters x 1 28 y 1 11 symbol cCLS 130 clear the screen no parameters user must wait 10 ms symbol cTEXTVIS 131 text visibility one parameter hide 0 show 1 symbol cTRANSLU 132 translucent text one parameter off 0 on 1 symbol cBACKCOLOR 133 background color one parameter color 0 7 symbol cZOOM 134 zoom three parameters row 1 11 hscale 1 4 vscale 1 4 symbol cCHARCOLOR 135 character color one parameter color 0 7 symbol cCHARBLINK 136 character blink one parameter off 0 on 1 symbol cRESET 137 reset osd 232 user must wait 10 ms symbol cSETVOFFSET 138 set the text screen vertical position one parameter offset 1 63 symbol cSETHOFFSET 139 set the text screen horizontal position one parameter offset 1 58 variables symbol ent w0 counter main pause 500 wait for OSD 232 to power up serout 0 N2400 cMODE 1 lt make full screen serout 0 N2400 cBACKCOLOR cBLACK set screen color to black serout 0 N2400 cTEXTVIS 0 hide text while drawing a full s
5. cSEROUT CON 0 pin 0 serial out to OSD 232 misc constants cN48 CON 16884 4800 baud 8 bit no parity inverted data cN24 CON 17405 2400 baud 8 bit no parity inverted data color constants cBLACK CON 0 cBLUE CON cGREEN CON cCYAN CON cRED CON cMAGENTA CON cYELLOW CON cWHITE CON NYDN D KE command constants cMODE CON 128 overlay or full screen one parameter overlay mode 0 full screen 1 cSETPOS CON 129 set cursor position 2 parameters x 1 28 y 1 11 cCLS CON 130 clear the screen no parameters user must wait 10 ms cTEXTVIS CON 131 text visibility one parameter hide 0 show 1 cTRANSLU CON 132 translucent text one parameter off 0 on 1 12 cBACKCOLOR cZOOM cCHARCOLOR cCHARBLINK cRESET cSETVOFFSET cSETHOFFSET variables cnt main pause 500 serout cSEROU serout cSEROU serout cSEROU serout cSEROU pause 10 serout cSEROU serout cSEROU serout cSEROU serout cSEROU CON 133 background color one parameter color 0 7 CON 134 zoom three parameters row 1 11 hscale 1 4 vscale 1 4 CON 135 character color one parameter color 0 7 CON 136 character blink one parameter off 0 on 1 CON 137 reset osd 232 user must wait 10 ms CON 138 set the text screen vertical position one parameter offset 1 63
6. 4 or sending a special command flag followed by some parameters see the chart on page 5 Below are some examples of how to communicate with OSD 232 Remember to remove the BAUD jumper if connecting to a Basic I Stamp Sending Text Displaying text on OSD 232 is a simple process of sending the appropriate ASCII text In addition special characters for drawing graphics foreign language etc are available see the character chart on page 14 for a complete listing QBASIC example Basic 2 Stamp example print 1 Hello universe serout 0 40BC Hello universe Basic 1 Stamp example Basic 2 Stamp SX example serout 0 N2400 Hello universe serout 0 16884 Hello universe Setting The Cursor Position This example displays Hi at column 1 row 11 QBASIC example Basic 2 Stamp example print 1 chr 129 chr 1 chr 11 Hi serout 0 40BC 129 1 11 Hi Basic 1 Stamp example Basic 2 Stamp SX example serout 0 N2400 129 1 11 Hi serout 0 16884 129 1 1 11 Hi Clearing The Screen The clear screen command takes 10 milliseconds ms to complete so a delay is required before other commands or text should be sent QBASIC example Basic 2 Stamp example print 1 chr 130 serout 0 40BC 130 sleep 1 pause 10 Basic 1 Stamp example Basic 2 Stamp SX example serout 0 N2400 130 serout 0 16884 130 pause 10 pause 10
7. 400 baud 8 bit no parity inverted data color constants cBLACK CON 0 cBLUE CON cGREEN CON cCYAN CON cRED CON cMAGENTA CON cYELLOW CON cWHITE CON NYDN D HE command constants cMODE CON 128 lt overlay or full screen one parameter overlay mode 0 full screen 1 cSETPOS CON 129 set cursor position 2 parameters x 1 28 y 1 11 cCLS CON 130 clear the screen no parameters user must wait 10 ms cTEXTVIS CON 131 text visibility one parameter hide 0 show 1 cTRANSLU CON 132 translucent text one parameter off 0 on 1 10 cBACKCOLOR CON 133 background color one parameter color 0 7 cZOOM CON 134 zoom three parameters row 1 11 hscale 1 4 vscale 1 4 cCHARCOLOR CON 135 character color one parameter color 0 7 cCHARBLINK CON 136 character blink one parameter off 0 on 1 cRESET CON 137 reset osd 232 user must wait 10 ms cSETVOFFSET CON 138 set the text screen vertical position one parameter offset 1 63 cSETHOFFSET CON 139 set the text screen horizontal position one parameter offset 1 58 variables cnt VAR BYTE counter main pause 500 wait for OSD 232 to power up serout CSEROUT cN48 c MODE 1 lt make full screen serout CS9EROUT cN48 cBACKCOLOR cBLACK set screen color to black serout CSEROUT cN48
8. OSD 232 Version 1 02 ITUITIVE CIRCUITS LLC ORELL Copyright 1998 Intuitive Circuits LLC D escription OSD 232 is a video on screen character overlay board From any RS 232 source like a personal computer or microcontroller like the Basic Stamp display 28 columns by 11 rows of information 308 characters total directly onto any NTSC or optional PAL baseband video in television or VCR OSD 232 can overlay monochrome text onto an incoming video source or display colored text on a self generated colored background screen e g a blue screen Text color blinking zoom level cursor positioning and the background color is controlled through the PC s serial routines or the Stamp s serout statement Other commands include screen clearing showing hiding the text and enabling disabling translucent text a feature that allows video to pass through the text like the major television networks do with their logos Dimensions 2 1 2 x 2 1 2 x 1 2 Weight 0 8 oz Input voltage 8 0 to 14 0 volts DC 60 ma max Operating temperature 0 C to 70 C Text area 28 columns by 11 rows 308 characters Character set 128 characters Character size 12 x 18 pixels Video levels 1 volt peak to peak nominal composite video Video impedance input 75 ohm output 75 ohm resistively terminated RS 232 serial input 2400 or 4800 baud 8 data bits 1 stop bit inverted data nstallation The following is the list of OSD 232 c
9. cTEXTVIS 0 hide text while drawing a full screen serout CSEROUT cN48 cCLS clear the screen pause 10 wait 10 ms serout CSEROUT cN48 serout CSEROUT cN48 serout CSEROUT cN48 serout CSEROUT cN48 cCHARCOLOR cRED Character Set cCHARCOLOR cWHITE cSETPOS 1 2 set cursor at xpos and ypos 2 emma draw character set for cnt 0 TO 127 serout CSEROUT cN48 cnt next serout CSEROUT cN48 serout CS9EROUT cN48 serout CSEROUT cN48 serout CSEROUT cN48 serout cCSEROUT cN48 serout CSEROUT cN48 serout CSEROUT cN48 serout cCSEROUT cN48 cCHARCOLOR cGREEN cCHARBLINK 1 cSETPOS 1 11 Blinking green text cCHARBLINK 0 cSETPOS 28 11 95 draw icon cTEXTVIS 1 show text eee ar re pe re end 11 Listing 4 Basic Stamp II BSX Sample SAMPLE BSX A sample program to exercise OSD 232 via a Parallax Basic II SX Stamp Remember if the BAUD jumper is removed then change all the serout statements cN48 parameter 4800 baud to cN24 2400 baud C Copyright 1998 Intuitive Circuits LLC Connect OSD 232 to the Basic Stamp II SX as follows Stamp II SX pin 4 GND gt OSD 232 SERIAL GND lt Stamp H SX pin 5 1 0 0 gt OSD 232 SERIAL IN DIRS 0000000000000001 Input pins are 0 output pins are 1 and pin 0 is the right most bit So make pin 0 an output pin constants
10. creen serout 0 N2400 cCLS clear the screen pause 10 wait 10 ms serout 0 N2400 cCCHARCOLOR cRED serout 0 N2400 Character Set serout 0 N2400 cCHARCOLOR cWHITE serout 0 N2400 cSETPOS 1 2 set cursor at xpos 1 and ypos 2 lt draw character set for cnt 0 TO 127 serout 0 N2400 cnt next serout 0 N2400 cCCHARCOLOR cGREEN serout 0 N2400 cCHARBLINK 1 serout 0 N2400 cSETPOS 1 11 serout 0 N2400 Blinking green text serout 0 N2400 cCHARBLINK 0 serout 0 N2400 cSETPOS 28 11 serout 0 N2400 95 draw icon serout 0 N2400 cTEXTVIS 1 show text end Listing 3 Basic Stamp II BS2 Sample SAMPLE BS2 A sample program to exercise OSD 232 via a Parallax Basic II Stamp C Copyright 1998 Intuitive Circuits LLC Connect OSD 232 to the Basic Stamp II as follows Remember if the BAUD jumper is removed then change all the serout statements cN48 parameter 4800 baud to cN24 2400 baud Stamp II pin 4 GND gt OSD 232 SERIAL GND lt Stamp Il pin 5 I O 0 gt OSD 232 SERIAL IN DIRS 0000000000000001 Input pins are 0 output pins are 1 and pin 0 is the right most bit So make pin 0 an output pin constants cSEROUT CON 0 pin O0 serial out to OSD 232 misc constants cN48 CON 4000 188 4800 baud 8 bit no parity inverted data cN24 CON 4000 396 2
11. f 0 on 1 cRESET CHR 137 reset osd 232 user must wait 10 ms cSETVOFFSET CHR 138 set the text screen vertical position one parameter offset 1 63 cSETHOFFSET CHR 139 set the text screen horizontal position one parameter offset 1 58 program entry open com port with all handshaking disabled settings com cport 4800 n 8 1 CD0 CS0 DS0 OP0 OPEN settings FOR RANDOM AS 1 PRINT 1 cRESET reset osd 232 and clear the screen SLEEP 1 lt wait 10 ms PRINT 1 CMODE CHR 1 lt make full screen PRINT 1 cBACKCOLOR cBLACK set screen color to black PRINT 1 cCHARCOLORS cWHITE text is white PRINT 1 cSETPOS CHR 3 CHR 5 set cursor at xpos 1 ypos 5 PRINT 1 Current Time ENDLESS PRINT 1 cSETPOS CHR 18 CHR 5 set cursor at xpos 16 ypos 5 PRINT 1 TIMES SLEEP 1 GOTO ENDLESS CLOSE close the com port will never get here END Listing 2 Basic Stamp I BS1 Sample SAMPLE BAS A sample program to exercise OSD 232 via a Parallax Basic I Stamp Remember the BAUD jumper must be removed 2400 baud C Copyright 1998 Intuitive Circuits LLC Connect OSD 232 to the Basic Stamp I as follows Stamp I GND gt OSD 232 SERIAL GND lt Stamp I I O 0 gt OSD 232 SERIAL IN color constants symbol cBLACK
12. ircuit board pads and what to attach them to Pad Attach To 12 VDC and GND 8 to 14 volt supply VIDEO IN and GND Incoming NTSC PAL video source not required VIDEO OUT and GND Outgoing NTSC PAL video source with overlaid text SERIAL IN Stamp IO pin DB 9 pin 3 or DB 25 pin 2 SERIAL GND Stamp GND DB 9 pin 5 or DB 25 pin 7 Board Mounting Details Mount the OSD 232 board into a shielded enclosure to protect it from RF For each of the four mounting holes be sure to use two 4 40 nuts or one 1 4 spacer between the OSD 232 board and chassis to prevent the bottom of the OSD 232 board from shorting to the chassis 4 40 Nut C 4 Lock Washer Circuit Board Two 4 40 Nuts or one spacer EE 4 Lock Washer I TI 1 Chassis Drill 1 8 dia hole 4 40 x 1 2 Screw Baua Configuration The OSD 232 comes with the BAUD jumper installed 4800 baud If 2400 baud is desired for slower controllers like the Basic I stamp then remove the jumper It is important to note that the OSD 232 only looks at the jumper when power is first applied If the jumper is added or removed while OSD 232 is powered then the power must be turned off and back on before the new baud rate will be recognized Communicating with OSD 232 Communicating with OSD 232 consists of either sending a displayable character value of 0 through 127 see the character chart on page 1
13. set 1 63 SET HORIZONTAL OFFSET Set the text screen horizontal position offset 1 58 Listing 1 QBASIC Sample QBSAMPLE BAS A sample program to exercise OSD 232 via a QBASIC on the P C The current time is displayed on a black screen with white numbers Remember to install the BAUD jumper for 4800 baud operation and change cport below for the proper com port c Copyright 1998 Intuitive Circuits LLC cport 2 com port 2 constants colors cBLACKS CHRS 0 cBLUES CHR 1 cGREEN CHR 2 cCYAN CHR 3 cRED CHR 4 cMAGENTA CHR 5 cYELLOWS CHR 6 cWHITES CHR 7 commands cMODE CHR 128 overlay or full screen one parameter overlay mode 0 full screen 1 cSETPOS CHR 129 set cursor position 2 parameters x 1 28 y 1 11 cCLS CHR 130 clear the screen no parameters user must wait 10 ms cTEXTVIS CHR 131 text visibility one parameter hide 0 show 1 cTRANSLUCENTS CHR 132 translucent text one parameter off 0 on 1 cBACKCOLORS CHR 133 background color one parameter color 0 7 cZOOM CHR 134 zoom three parameters row 1 11 hscale 1 4 vscale 1 4 cCHARCOLOR CHR 135 character color one parameter color 0 7 cCHARBLINK CHR 136 character blink one parameter of

OSD-232

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