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Thread: A little HELP!!

  1. #41

    Default Re: A little HELP!!

    Out of interest what supplier are you using to get the chips and what price ?

    The schematic is not mine - it was used as a guide, however the values of resistors etc are the same, and what is used in the STV pdf.

  2. #42
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    320

    Default Re: A little HELP!!

    Hi Aerostar!
    Just wanted to update everyone on the progress! The schematic was a big help! I had used a different schematic and had character timing problems. One line would be shifted left and the next line was 1 pixel right! Now the text is perfect thanks to you! Again I appreciate everything you have done. You are the best!

    Sincerely, Ed

  3. #43
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    Default Re: A little HELP!!

    Hi Aerostar!
    For some reason, probably needing new glasses, I miss your question about where to buy and cost! Here is the link: https://www.utsource.net/search.aspx...chWay=1&page=1

    Best, Ed

  4. #44
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    Default Re: A little HELP!!

    Hi!
    Not sure if anyone is still watching this thread and I would love to ask a few more questions if it would be okay?

    Thanks, Ed

  5. #45
    Join Date
    Oct 2014
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    2

    Default Re: A little HELP!!

    Hi Ed,

    Seems like you are making some progress on this project. I was tempted to purchase some chips from the supplier, but now think will wait a while longer to see how your results conclude. I was a little concerned given how long these devices have been EOL about them being actually genuine. So will be an interesting story to hear how you finally progress & about any discoveries you make along the way.

    Certainly aerostar has proven the code for usage on the NTSC video standard with real life testing of his original prototype boards.

    Mike.

  6. #46

    Default Re: A little HELP!!

    The chips as far as I know were never cloned, so I would say UTsource are genuine. It is a specialised IC and were used by cctv companies and video equipment manufacturers. In the UK they are still being used in the Amateur radio fraternity. It is a long time since EOL, but they are still very useful.

    If you go here http://dunstabledownsradioclub.org and choose TV Streams, GB3TZ in beacon mode (when not being used) the display is done using the STV chip, controlled by a Pic micro - (done in assembler, not by me) , the Pic also controls the repeater logic.

    My involvement in these chips - way back in 2003ish was to insert time overlay in cctv systems which did not have their own OSD, and using MSF or GPS to provide accurate time.

  7. #47
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    Default Re: A little HELP!!

    Hi All!
    When I purchased the chips the fact that they were offering large quantities at a discount suggested they were still being manufactured. Okay back to the code stuff. In the beginning of the code there are "con" statements and yet there does not seem to be any reference to these statements. Why are these statements part of the code? "NTSC." appears on the screen with or without a video reference. I wish to get to the point where I can place text such as STBRPM (Starboard RPM) and PORTRPM (Port RPM with a variable of 4 digits following the text while there is a video input signal from a camera. How can this be done? Maybe I could start with something simple such as moving the "NTSC." from the right side of the screen to the left? Again my greatest thanks!

    Ed

  8. #48

    Default Re: A little HELP!!

    Some "Con" statements left over from debug etc code that was stripped out as I said somewhere earlier, and were also used as memory jogger.

    NTSC. will appear as this program always sends on screen refresh regardless of whether there is video input or not, it is down to you what you wish to be displayed with or without incoming video, it was for video repeater ident.


    This is the part you need to understand about placing text on screen

    HEADER:
    LINECOUNTER=2 'SET START POSITION ********* line 3 from top (0-2 = 3!)
    CHARCOUNTER=23 'SET CURSOR POSITION***********Character position start 23rd from left
    GOSUB SETLINE
    FOR CHARS2=0 TO 4
    READ CHARS2, ASCCHAR
    gosub GETSTVCHAR 'CONVERT ASCII TO STV
    GOSUB DISPLAYCHAR
    NEXT
    RETURN

    NOVIDEO:
    LINECOUNTER=5 'SET START POSITION
    CHARCOUNTER=4 'SET CURSOR POSITION
    GOSUB SETLINE
    FOR CHARS2=6 TO 23 ' FROM EEPROM DATA
    READ CHARS2, ASCCHAR
    gosub GETSTVCHAR 'CONVERT ASCII TO STV
    GOSUB DISPLAYCHAR
    NEXT
    RETURN

    with regards to getting your RPMs on screen the DIG command would probably help,

    so if you had a reading of 2400 as rpm in a word byte RPM, I THINK (following is UNTESTED)

    ASCCHAR = RPM DIG 1
    This gives a value of 2, and as it happens the character matrix in the chip will display 2 as if you look at the table the numbers come first

    then
    GOSUB DISPLAYCHAR

    then

    ASCCHAR = RPM DIG 2
    This gives a value of 4

    and so on to dig 4, you could make a loop to do this.

    Not quite sure what happens if the value is below 1000, but you could easily check that prior to doing DIG 4 and put a blank there instead, skipping the DIG 4.

  9. #49
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    Default Re: A little HELP!!

    Thank you and I am feeling incredibly stupid right now, even after 4 Excedrin's! I think I understand part of this, "RPM" is the variable where the RPM reading is stored? "DIG" is the number of digits to be displayed? So RPM DIG 4 would display 4 digits? Where do you inset the "ASCCHAR = RPM DIG 4? I think this line goes after "GOSUB SETLINE"? Then how do you display "RPM" in front of the reading? Please excuse what seems to be basic, simple questions and once I stop having brain craps things should get better!

    Ed

  10. #50

    Default Re: A little HELP!!

    Quote Originally Posted by Ramius View Post
    Thank you and I am feeling incredibly stupid right now, even after 4 Excedrin's! I think I understand part of this, "RPM" is the variable where the RPM reading is stored? "DIG" is the number of digits to be displayed? So RPM DIG 4 would display 4 digits? Where do you inset the "ASCCHAR = RPM DIG 4? I think this line goes after "GOSUB SETLINE"? Then how do you display "RPM" in front of the reading? Please excuse what seems to be basic, simple questions and once I stop having brain craps things should get better!

    Ed
    If I asked you what the 2nd digit was of 2400 (normal reading left to right) you would immediately tell me 4 - congratulations you have just done a DIG 2,

    RPM is a variable name suggested where you would store the reading from whatever interface you have on the motors.


    DIG X just gives you the value of the single digit starting from the left hand side.

    so if as I said above your RPM was 2400

    DIG 4 would return 0 ie the last digit of 2400.

    DIG 2 would return 4 ie the second digit


    You set the line where you want the data to be shown
    set the cursor where you want the first character of your data to start



    For "RPM" in front

    ASCCHAR="R"
    GOSUB GETSTVCHAR 'CONVERT ASCII TO STV
    GOSUB DISPLAYCHAR

    repeat the above 3 lines for "P", "M" and " "


    now use the RPM word variable where you have stored your reading (RPM for instance)

    ASCCHAR = RPM DIG 1
    This gives a value of 2, and as it happens the character matrix in the chip will display 2 as if you look at the table the numbers come first

    then
    GOSUB DISPLAYCHAR

    then

    ASCCHAR = RPM DIG 2
    This gives a value of 4
    GOSUB DISPLAYCHAR


    ASCCHAR = RPM DIG 3
    This gives a value of 0
    GOSUB DISPLAYCHAR

    ASCCHAR = RPM DIG 4
    This gives a value of 0
    GOSUB DISPLAYCHAR


    so on the screen at the line you have selected starting at the position you have selected, you would have RPM 2400

  11. #51
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    Default Re: A little HELP!!

    Hi!
    My code does not work!! NTSC. no longer displays which is understandable. The code complies and when I run it nothing is displayed! Must have missed something basic?

    Code:
    
    '****************************************************************
    '*  Name    : NTSC-1                                            *
    '*  Author  : Ed Cannady                                        *
    '*  Notice  : Copyright (c) 2017                                *
    '*          : All Rights Reserved                               *
    '*  Date    : 06-30-17                                          *
    '*  Version : 1.0                                               *
    '*  Notes   : VIDEO IDENT                                       *
    '*          : WITH GREAT HELP FROM AEROSTAR                     *
    '****************************************************************
    
    ' WORKS USES SYNC FOR SWITCHING BETWEEN MIXED AND FULL TEXT MODE
    ' GOING FROM VID IN TO TEXT AND BACK TO VID IN
     
    #CONFIG
    
        __config _HS_OSC & _WDT_ON & _MCLRE_ON & _LVP_OFF & _CP_OFF
        
    #ENDCONFIG
               
    define  OSC 20
       
    '---------------------------------------------------------------
    '16f628a  ED definitions
     
        TVSDA        VAR PORTB.4    '0     OUTPUT to pin 11 of stv chip 
        CS0     	 VAR PORTB.6    '0     OUTPUT to pin 13 of stv chip 
        TVSCL     	 VAR PORTB.5    '0     OUTPUT to pin 12 of stv chip 
        SYNCH0       VAR PORTB.7    '1     INPUT  to pin 7  of stv chip 
    '--------------------------------------------------------------- 
    
        ZOOMREG      CON %0000000011001100       ' 12 ZOOM REGISTER
        COLREG       CON %0000000011001101       ' 13 COLOUR REGISTER
        CONREG       CON %0000000011001110       ' 14 CONTROL REGISTER
        POSREG       CON %0000000011001111       ' 15 POSITION REGISTER 
        MODEREG      CON %0000000011010000       ' 16 MODE REGISTER
    
        
    	ICOUNT  	 VAR BYTE
    	BITCOUNTER 	 VAR BYTE
    	WDATA   	 VAR WORD
    	CHARCOUNTER	 VAR BYTE   
    	LINECOUNTER	 VAR BYTE 
    
    
        STVCHAR      VAR BYTE
        ASCCHAR      VAR BYTE
        CHARS        VAR BYTE
        CHARS2       VAR BYTE
        TEMP         VAR BYTE 
        TEMP1        VAR BYTE
        COUNTER      VAR BYTE
        PULSES       VAR BYTE
        CURRENTMODE0 VAR BYTE
        PRPM         VAR WORD
    
    '----------------------------------------------------------------     
    '    TOPLEFT         CON 0
    '    TOPMIDDLE       CON 5
    '    TOPRIGHT        CON 10
    '    BOTLEFT         CON 2560    '10*256
    '    BOTMIDDLE       CON 2565 '(10*256)+ 5
    '    BOTRIGHT        CON 2570 '(10*256)+ 10
    '---------------------------------------------------------------- 
    
        DATA @0,"NTSC.",$FF,"NO SYNCHS RECEIVED",$FF   
     
        TRISB = %10001111
    
    '----------------------------------------------------------------     
    
        PAUSE 500
        
    	GOSUB Init
    	
        PAUSE 500
    	GOSUB Init
        
        CURRENTMODE0=255         ' FORCES TRYSYNCHS TO SET MODE FIRST TIME
    
    	
    Demo:
    
    CHARCOUNTER = 0
    	LINECOUNTER = 0
    '   CURRENTMODE0 = 0     '0 = MIXED 1 = TEXT
        gosub CLS
        GOSUB TRYSYNCHS      '==================================
    
    
        TEMP = 0
      
         
    
    LOOPER:
        PRPM = 6789
        GOSUB HEADER    ' LINE 3 RIGHT HAND SIDE TEST.
        IF CURRENTMODE0=1 THEN
        GOSUB NOVIDEO   ' DISPLAYS NO VIDEO IF NO INCOMING SYNCHS
        ENDIF
    
        
        GOSUB TRYSYNCHS       '===========================
        
    
    '    PAUSE 500            'I/2 SECOND DELAY
    '    TOGGLE HEARTBEAT     ' LED
        GOTO LOOPER           'DO IT FOREVER
      
    
    DISPLAYCHAR:   
    
    WDATA = %0001010000000000 + STVCHAR
    
    '               11 10 9 8  7654 3210
    ' WDATA = %0001 0  1  1 1  0000 0000 + STVCHAR
    
    ' bit 11 = character background 0 = disabled 1 = enabled       
    
    ' bit 10 = red
    ' bit 09 = green
    ' bit 08 = blue
    
    ' 000 = black
    ' 001 = blue
    ' 010 = green
    ' 011 = cyan
    ' 100 = red
    ' 101 = magenta
    ' 110 = yellow
    ' 111 = white
        
    ' bit 7 = blink 1=enable 0=disable    
        
        GOSUB SEND 
         RETURN
    SETLINE:    
    	WDATA = LINECOUNTER*256 + CHARCOUNTER
        GOSUB Send              'position cursor   
        RETURN
    
    
    
    WasteTime:        ' WORKS WITH LESS NOPS
    
        pauseus 20    ' was 20 nops
    	RETURN
    
    StartCommunication:
    	TVSCL = 1 'HIGH TVSCL 
        GOSUB WasteTime
    
        CS0 = 0 'LOW CS0
    
        GOSUB WasteTime
    	TVSCL = 0 'LOW TVSCL
        GOSUB WasteTime
    	RETURN
    
    StopCommunication:
    	TVSCL = 1 'HIGH TVSCL
        GOSUB WasteTime
        CS0 = 1 'HIGH CS0
    
        GOSUB WasteTime
    	RETURN
    
    SendOne:
    	TVSDA = 1 'HIGH TVSDA
        GOSUB WasteTime
    	TVSCL = 0 'LOW  TVSCL
        GOSUB WasteTime
    	TVSCL = 1 'HIGH TVSCL
        GOSUB WasteTime
    	RETURN
    
    SendZero:
    	TVSDA = 0 'LOW TVSDA
        GOSUB WasteTime
    	TVSCL = 0 ' LOW TVSCL
        GOSUB WasteTime
    	TVSCL = 1 'HIGH TVSCL
        GOSUB WasteTime
    	TVSDA = 1 'HIGH TVSDA
        GOSUB WasteTime
    	RETURN
    
    OutByte:
    	FOR BITCOUNTER = 1 TO 16
        IF WDATA.15 = 1 THEN
        GOSUB SendOne
        ELSE
        GOSUB SendZero
        ENDIF
        WDATA = WDATA << 1
    	NEXT BITCOUNTER
    	RETURN
    
    Send:
    	GOSUB StartCommunication
    	GOSUB OutByte
    	GOSUB StopCommunication
    	RETURN
    
    '-------------------------------------------------------------  
    
    Init:     '    PAUSE 50 added - seems to improve reliability of init
    
    	TVSCL = 1 'HIGH TVSCL
        TVSDA = 1 'HIGH TVSDA
        CS0 = 1 'HIGH CS0
     
    	WDATA = $3000  '%110000 00000000
        GOSUB Send     ' Init STV5730
        PAUSE 50
    	WDATA = $3000
        GOSUB Send
        PAUSE 50
    	WDATA = $00DB  '%00000000 11011011
        GOSUB Send
        PAUSE 50
    	WDATA = $1000  '%00010000 00000000
        GOSUB Send
        PAUSE 50
    '-------------------------------------------------------------  
    	WDATA = %0000000011001100
        GOSUB Send     ' Init registers (point to register 12)
        PAUSE 50
    '-------------------------------------------------------------      
    	WDATA = %0001000000000000   'NORMAL
    '   WDATA = %0001000011110000   '4 PIXELS HORIZ AND VERT
        GOSUB Send ' Zoom    ADDRESS 12
        PAUSE 50
    '-------------------------------------------------------------      
    	WDATA = %0001001000000000
    
    '   WDATA = %0001001000000100
        GOSUB Send ' Color    ADDRESS 13
        PAUSE 50
    '--------------------------------------------------------
    
        WDATA=  %0001101011010100
                'CHANGE BIT 0 TO 1 FOR TEXT ONLY
        GOSUB Send ' Control    ADDRESS 14
    '-------------------------------------------------------------    
    	WDATA = %0001011111001111
        GOSUB Send ' Position    ADDRESS 15
    '------------------------------------------------------------- 
    
       
    	WDATA = %0001000100101110 '$183E BIT 11 CHANGED TO 0  M4 = 0
       
        GOSUB Send ' Mode    ADDRESS 16  %0001100000111110
    
    '------------------------------------------------------------- 
     
    	WDATA = $00C0   '%00000000 11000000
        GOSUB Send ' Set row attributes
         
    	FOR ICOUNT = 0 TO 10
        WDATA = $10C4 '%00010000 11000100
      	' WDATA =%0001000010000111
        GOSUB Send
    	NEXT ICOUNT
    	RETURN
     
    CLS: 
        'character=$0B       'SPACE
         TEMP1=0   ' LINECOUNTER
         TEMP =0    'CHARCOUNTER
    loop2:
        
    	WDATA = 0  ' LINECOUNTER*256 + CHARCOUNTER   ADDRESS
        GOSUB Send
        
    
    LOOP3:         ' :CHARACTERS        
    	WDATA = %0001011100001011  ' 1011 0BH SPACECHARACTER
        GOSUB Send
    	TEMP = TEMP + 1
    	IF TEMP >= 28 THEN
        TEMP = 0
        TEMP1=TEMP1 + 1
    	ENDIF
    	IF TEMP1 >= 11 THEN SCREENBLANK
     	
        GOTO LOOP3
        
    SCREENBLANK:
    	RETURN
    
    GETSTVCHAR:        ' CONVERT ASCII TO STV
        STVCHAR =$7F   ' FORCES CLOCK PICTURE IF ERROR         
        LOOKDOWN ASCCHAR,["0123456789- ABCDEFGHIJKLMNOPQRSTUVWXYZ:./'abcdefghijklmnopqrstuvwxyz"],STVCHAR
        RETURN 
    
    HEADER:
        LINECOUNTER=12      'SET START POSITION
        CHARCOUNTER=1       'SET CURSOR POSITION
        GOSUB SETLINE
    '    FOR CHARS2=0 TO 4
    '    READ CHARS2, ASCCHAR
        ASCCHAR = "P"
        gosub GETSTVCHAR    'CONVERT ASCII TO STV
        GOSUB DISPLAYCHAR    
        ASCCHAR = "R"
        gosub GETSTVCHAR    'CONVERT ASCII TO STV
        GOSUB DISPLAYCHAR    
        ASCCHAR = "P"
        gosub GETSTVCHAR    'CONVERT ASCII TO STV
        GOSUB DISPLAYCHAR    
        ASCCHAR = "M"
        gosub GETSTVCHAR    'CONVERT ASCII TO STV
        GOSUB DISPLAYCHAR    
        ASCCHAR = PRPM DIG 1
        GOSUB DISPLAYCHAR    
        ASCCHAR = PRPM DIG 2
        GOSUB DISPLAYCHAR   
        ASCCHAR = PRPM DIG 3
        GOSUB DISPLAYCHAR    
        ASCCHAR = PRPM DIG 4
        GOSUB DISPLAYCHAR  
    '   gosub GETSTVCHAR    'CONVERT ASCII TO STV
    '   GOSUB DISPLAYCHAR
    '    NEXT
        RETURN
        
    NOVIDEO:
        LINECOUNTER=5       ' SET START POSITION
        CHARCOUNTER=4       ' SET CURSOR POSITION
        GOSUB SETLINE
        FOR CHARS2=6 TO 23  ' FROM EEPROM DATA
        READ CHARS2, ASCCHAR
        gosub GETSTVCHAR    ' CONVERT ASCII TO STV
        GOSUB DISPLAYCHAR
        NEXT
        RETURN
        
    TRYSYNCHS:
        
        PULSES=0
    
        COUNT SYNCH0,4,PULSES' 3MS SHOULD COUNT TO 2 OR 3
        IF PULSES > 0 THEN MIXED0
        
    FULL0:
    
        IF CURRENTMODE0=1 THEN RETURN
    
        WDATA=  %0000000011001110'CONTROL REGISTER
        GOSUB SEND
        WDATA=  %0001101011010101
    '   CHANGE BIT 0 TO 1 FOR TEXT ONLY  ORIGINAL
                
    '   WDATA=  %0001101111010100
    '   CHANGE BIT 0 TO 1 FOR TEXT ONLY        
        GOSUB SEND
    
    STAYHERE02:
      
        CURRENTMODE0=1
            GOSUB CLS
    GOBACK0:
        RETURN
    
    
    MIXED0:
        IF CURRENTMODE0=0 THEN RETURN
        WDATA=  %0000000011001110       ' CONTROL REGISTER
        GOSUB SEND
        WDATA=  %0001101011010100
        GOSUB SEND
    
    STAYHERE01:
    
        CURRENTMODE0=0
        GOSUB CLS
        RETURN

  12. #52

    Default Re: A little HELP!!

    Some booboos from both of us !

    The DIG operation I got reversed, DIG 0 gives the units, DIG 1 the tens, and so on, the example I found on how it worked was ambiguous and I did say it was all untested in post 48.


    To get it on the screen the variable was wrong it needed to be changed from ASCCHAR to STVCHAR, but only for DIG use.

    HEADER:
    LINECOUNTER=12 'SET START POSITION

    There is no line 12 ! check the STV spec it has 11 rows so valid would be 0 - 10.

    I have put back the "NTSC" as that should always work, if what you have done after does not show but NTSC does then the problem must be in the new code addition.

    I found one wdata that had a bit incorrect and have corrected those, easily done if the codestudio cursor is in the wrong place and you type something.

    I would suggest small changes to the code, try it, if it works fine go on to next changes. Also perhaps save each version as you go with a number in the file name so you can easily go back to the last working.


    Base colour and text is back to white on blue as it was a setting I knew that worked.

    Try the enclosed hex file generated from Your post with corrections as above, files called NTSC-RPM. Works fine on my test boards.
    Attached Files Attached Files

  13. #53
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    Location
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    Default Re: A little HELP!!

    Again my greatest thanks! Two confusions, first the NTSC. only works with no video in and second the PRPM 6789 only displays with no video input!? I thought the "NOVIDEO" subroutine meant it was for when there is no video input?

  14. #54

    Default Re: A little HELP!!

    With no incoming video you should have the NTSC the RPM and the NO SYNCHS DETECTED.

    With a video signal coming in you should have NTSC and the RPM only on the screen and overlaying the incoming video picture.

    I had reconverted by boards back to PAL, but have just changed just 1 back to NTSC and was using a PAL input for an incoming signal for test input.

    I have got hold of a Raspberry PI which can be set to output NTSC so will try that some time tomorrow to see if it works as it should.

    I wonder if you have your board correctly wired especially vin to vout pin 1 and 28 and no connection on vout2 pin 26, pins 20 to 23 grounded, pin 24 to 25 connected
    Last edited by aerostar; - 15th July 2017 at 18:43. Reason: Board wiring added

  15. #55
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    Default Re: A little HELP!!

    I believe everything is wired correctly. Yes pin 1 to 28 is connected. Pin 26 (Vout2) goes through a 3.3k resistor per the schematic and removing the resistor does not make a difference. Yes 20-23 are grounded. Before the software changes, NTSC. appeared both with video in and no video in. No video in will display the "No Synchs received" message with NTSC. and the PRPM 6789 message. Now with video in nothing is displayed almost as if our added code is in the wrong subroutine section?

  16. #56
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    Default Re: A little HELP!!

    Hi!
    I took a previous version and inserted the additional code and it worked sort of! The PRPM now appears in both the mode with a video input and without a video input! You wrote "I found one wdata that had a bit incorrect and have corrected those, easily done if the codestudio cursor is in the wrong place and you type something." Not sure which or where so maybe this was the cause? There is something else I cannot seem to change and that is the size of the characters! You can see in the code I changed the zoom register to all zeros which should make the characters the smallest possible, however any line number greater than line 8 is off the screen! Is there more than one register I need to change?

    Thanks, Ed

    P.S. attached is the code without the wdata bit change.
    Attached Files Attached Files

  17. #57

    Default Re: A little HELP!!

    Looks like we both doing the same thing, attached is my corrected version

    I have tested this with NTSC output from RPi and it switches and displays correctly.

    I have moved the text, also the RPM and NTSC so that it only appears when there is incoming video.

    Regarding the text size I think you will have to play with the POSITION REGISTER - never tried that but that should do something. The STV data sheet does not give much idea as to what that does !

    Use my hex file and see if it works on yours.

    Should have changed the file name - memory lapse.
    Attached Files Attached Files

  18. #58

    Default Re: A little HELP!!

    I had a quick look at the Position Register and put this in

    WDATA = %0001001000001111 '%0001 011111 001111
    GOSUB Send ' Position ADDRESS 15

    It moved the lines up and I could get line 9 showing - still missing line 10 at the moment.

    Looks like Row Attributes may also be involved.

    Will have to ask my friend who did the assembler version if he did anything to Row Attributes.

  19. #59
    Join Date
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    Location
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    Posts
    320

    Default Re: A little HELP!!

    Hi Aerostar!
    I had thought that this was the character size:

    WDATA = %0001000011110000 '4 PIXELS HORIZ AND VERT !
    GOSUB Send ' Zoom ADDRESS 12

    So I changed it to: WDATA = %0001000000000000 and it made no difference in the text size!

    I would also be curious if your setup displays actual red characters as mine seems like a light pink.

    Here is a picture of my board

    Best, Ed

    Name:  IMG_2438.JPG
Views: 92
Size:  65.7 KB

  20. #60

    Default Re: A little HELP!!

    Actually the zoom was already set at minimum.

    Not played with colour oops sorry color!! but Never Twice Same Color sets have a HUE/TINT control that you can alter on the screen.

    I now have worked out getting all lines on screen, it is combined with position and line characteristics. Removed the border area around the characters

    Here are the values I have used to get the attached picture.

    WDATA Values to be changed to values below

    In init routine

    '-------------------------------------------------------------
    WDATA = %0001001100001111 ' was %0001 011111 001111
    GOSUB Send ' Position ADDRESS 15 *****
    '-------------------------------------------------------------

    and in this

    FOR ICOUNT = 0 TO 10
    WDATA = %0001000010000001 '<<<<<$10c4 originally
    ' WDATA =%0001000010000111
    GOSUB Send
    NEXT ICOUNT

    that should! sort the screen out.

    Name:  STV-NTSC-DISPLAY.JPG
Views: 90
Size:  364.2 KB

    Quick and dirty code to do screen fill as a subroutine - modified CLS routine

    Run it with no external video input

    This is where I put the call, once it has done the Xs it will not go further remeber to comment out GOSUB HEADER.


    Code:
    LOOPER:
        'GOSUB HEADER    ' LINE 3 RIGHT HAND SIDE TEST.
        GOSUB FILLSCREEN
    STOPHERE:
        GOTO STOPHERE
    I put this at the very bottom of current code.

    Code:
    '----------------------debug fills screen with X------------------
    
    FILLSCREEN: 
        'character=$0B       'SPACE
         TEMP1=0   ' LINECOUNTER
         TEMP =0    'CHARCOUNTER
    loop2a:
        
    	WDATA = 0  ' LINECOUNTER*256 + CHARCOUNTER   ADDRESS
        GOSUB Send
        
    
    LOOP3a:    '                :CHARACTERS 100011       
    	WDATA = %0001011100100011  '     X CHARACTER
        GOSUB Send
    	TEMP = TEMP + 1
    	IF TEMP >= 28 THEN
        TEMP = 0
        TEMP1=TEMP1 + 1
    	ENDIF
    	IF TEMP1 >= 11 THEN SCREENBLANKA
     	
        GOTO LOOP3A
        
    SCREENBLANKA:
    	RETURN
    Last edited by aerostar; - 17th July 2017 at 12:39. Reason: added some info

  21. #61

    Default Re: A little HELP!!

    Had a play with colors -I found that reducing the drive in the MODE REGISTER, BIT M5, from 6dB to 0dB improved the colours, so M5 needs to be a 0, this will depend on how good the monitor is..



    If you mofify the fillscreen to the following you should get lines of ifferent colors.
    Code:
    FILLSCREEN: 
        'character=$0B       'SPACE
         TEMP1=0   ' LINECOUNTER
         TEMP =0    'CHARCOUNTER
    loop2a:
        
    	WDATA = 0  ' LINECOUNTER*256 + CHARCOUNTER   ADDRESS
        GOSUB Send
                                                 
    
    LOOP3a:    '                :CHARACTERS 100011       
    	WDATA = %0001011100100011  '     X CHARACTER
    '   WDATA = %0001011101110111
    '    if temp1 =0 then WDATA = %0001011101110111
        if temp1 =1 then WDATA = %0001000001100011
        if temp1 =2 then WDATA = %0001000101100011
        if temp1 =3 then WDATA = %0001001001100011
        if temp1 =4 then WDATA = %0001001101100011
        if temp1 =5 then WDATA = %0001010001100011
        if temp1 =6 then WDATA = %0001010101100011
        if temp1 =7 then WDATA = %0001011001100011
        if temp1 >=8 then WDATA = %0001011101100011
        
        GOSUB Send
    	TEMP = TEMP + 1
    	IF TEMP >= 28 THEN
        TEMP = 0
        TEMP1=TEMP1 + 1
    	ENDIF
    	IF TEMP1 >= 11 THEN SCREENBLANKA
     	
        GOTO LOOP3A
        
    SCREENBLANKA:
    	RETURN

  22. #62
    Join Date
    Mar 2011
    Location
    Los Angeles, California
    Posts
    320

    Default Re: A little HELP!!

    Wow! This is really so great! Thank you! I will try the above code just as soon as possible. I loved your screen full of "X's"! If I understand things correctly the text is as small as it can be? FYI, I work at Fox Television so a high quality professional monitor is not difficult to bring home. Did you like how I built the board with the chip? This display is something I have been dreaming about for several years now and it is so wonderful to finally see some light at the end of the tunnel! I also believe the research and development is a major contribution for all others!

    Best, Ed

  23. #63

    Default Re: A little HELP!!

    Board looks great - There is still a demand for analogue OSD despite all the digital stuff around. The chips were hard to find after they had been discontinued, but your find of supplier seems to have lots still, price is good, Ebay prices .... silly.

    What are you going to this it for ?, I am guessing at RC aeroplane or boat, video from it and motor speed from port and starboard propulsion units.

  24. #64
    Join Date
    Mar 2011
    Location
    Los Angeles, California
    Posts
    320

    Default Re: A little HELP!!

    Yes, you are right on! I have an RC submarine called a Typhoon just like the one in my avatar. My first pic project was an electronic compass as you cannot use GPS underwater. A representative from China was going to buy compasses from me and said my compass was too precision as it is accurate to 1/10 of one degree. They only wanted to pay for 1/2 of one degree accuracy. At one point it seemed they only wanted the design and software so I published the information thus putting it in the public domain. The sub has twin drive motors with temperature sensors mounted on the. There is also a roll and pitch sensor, angle sensors on the bow planes, stern planes and rudder. A sensor for speed and another for depth. There is a sensor for battery voltage and current draw. A laser pointer has been added to the "sail" for targeting. The periscope is 3 mm in diameter and about 2" long with a first surface mirror at the top sending picture down the tube through some acromat lenses then a dove prism lens to reverse the image left to right to avoid using a second mirror. Below the dove prism lens is a "snake camera" which is 3/4" square pointed up the periscope. Since it is a small size it is able to pan left and right. One of the larger challenges was being able to transmit video from underwater. With a "strange" antenna configuration video could be transmitted from a depth of 1 meter, possibly more as my Jacuzzi is only 1 meter deep. There are also torpedoes and missiles fueled by compressed air. Others had used Estes rocket motors until one guy fired a missile from his swimming pool, it broke surface tension, make a left turn, cleared the fence, when through a screened in patio, and set fire to a couch that his neighbor was taking a nap on! Since this, we have all gone to compress air. My torpedoes have an optional nose cone made from a foam paint brush soaked in water color the dried. When these torpedoes are fired they leave a small orange trail and a large orange dot on whatever it hits (like duck butts!) So there are a lot of features and sensors that would be great to display the readings of. Okay, that's the basics.

    Best, Ed

  25. #65

    Default Re: A little HELP!!

    Must admit, I did not know about RC Subs, sounds great. Loved the bit about the guy and his rocket and neighbour !

  26. #66
    Join Date
    Mar 2011
    Location
    Los Angeles, California
    Posts
    320

    Default Re: A little HELP!!

    Glad you liked the story! Estes rocket motors generate their own oxygen therefore if you seal the nichrome with wax to make it waterproof you can fire the missile underwater! The wire does melt so you need a new wire for each firing. Some guys have even built exploding torpedoes which will actually sink plastic model surface ships or Skeedo Barbies! Lol Probably a silly question and I tried your color code and ended up with the first row of "X,s" and the remaining rows of just squares (no X's). Any idea what I could have done wrong?

    Thanks, Ed

  27. #67

    Default Re: A little HELP!!

    Do not think you have done anything wrong. Have a look at the characters in the data sheet - 63H is 1100011
    WDATA = %0001000001100011 is what I used, so change it to anything you want.

    Try 77H 1110111 also change the page background back to blue if you have changed it - It seems that NTSC/STV is finicky with colours of characters and page background also play with brightness/contrast/colour/tint. I had similar problem until played with the monitor controls and characters.
    change this line
    if temp1 >=8
    to

    if temp1 =8 then WDATA = %0001011101100011

    then add extra line

    if temp1 >=9 then WDATA = %0001011100100011

    This will/should give Xs on line 9

    Untested but should! work

  28. #68
    Join Date
    Mar 2011
    Location
    Los Angeles, California
    Posts
    320

    Default Re: A little HELP!!

    Yes you are right! What I did wrong was try it with a video input signal! When you wrote "Blue Background" that was the key to not use a video input source. A video input source gives the rectangles in white only! Do you know if it can work with a video in source? Also how do I play with lines 6 and 7 to try and get a red red and not pink?

    Thanks, Ed

  29. #69

    Default Re: A little HELP!!

    Data sheet says....

    Mixed mode : the device is line locked to the
    incoming CVBS signal. The text is superimposed
    over the CVBS input either in B&W or translucent.
    It may also be superimposed in color by using the
    R/G/B outputs.

    As it stands it switches to white characters on the incoming video.

    I have not got a good red out of it, by playing with tint/color/contrast and brightness. If you did manage to get a decent red, that of course would impact on the color of the incoming video signals.

    A black background MAY look better instead of blue, - the eye/brain can do funny things with colors.

  30. #70
    Join Date
    Mar 2011
    Location
    Los Angeles, California
    Posts
    320

    Default Re: A little HELP!!

    Thank you and does what you wrote mean we cannot have color characters over incoming video? Translucent should be fine if it has color.

  31. #71

    Default Re: A little HELP!!

    As far as I understand that data sheet statement, and of course I may be wrong, no colors over incoming video as well translucent unless you use RGB.

    Never tried this, plain white was fine for what I used the chip for.

  32. #72
    Join Date
    Mar 2011
    Location
    Los Angeles, California
    Posts
    320

    Default Re: A little HELP!!

    That seems kind of strange to me. Any ideas as to how we can test this? Maybe something simple like assigning a color to "NTSC"?

  33. #73

    Default Re: A little HELP!!

    I have looked at the BOB4 from decade.net and it looks like their version only does white text on incoming video.

    http://www.decadenet.com/bob4/bob4.html

    I believe the STV chip was really designed for Menu setups on televisions etc, prior to digital sets, and does not to put color text overlays in incoming video, other chip maker versions also no colour, 1990-2000ish did the same, Maxim, Sanyo.

    With digital sets it is now incorporated in a graphics chip onboard.


    This is where you can change the character color, it will affect all characters using this routine, text and overlay.

    DISPLAYCHAR:

    WDATA = %0001010000000000 + STVCHAR

    ' 11 10 9 8 7654 3210
    ' WDATA = %0001 0 1 1 1 0000 0000 + STVCHAR

    ' bit 11 = character background 0 = disabled 1 = enabled

    ' bit 10 = red
    ' bit 09 = green
    ' bit 08 = blue

    ' 000 = black
    ' 001 = blue
    ' 010 = green
    ' 011 = cyan
    ' 100 = red
    ' 101 = magenta
    ' 110 = yellow
    ' 111 = white

  34. #74
    Join Date
    Mar 2011
    Location
    Los Angeles, California
    Posts
    320

    Default Re: A little HELP!!

    Again my biggest thanks. I will play with it as time permits. Yes I had looked at the BOB4 sometime ago and it was only white from what I remember.
    Eagle Tree ( http://www.eagletreesystems.com/inde...product_id=136) does color text over video, however they would not share any information to customize their product for other purposes such as a sub. This is why I went back to the STV5730. I spent many hours and days searching for a chip to use with no success. Logically speaking, if you can add color text to a fixed color background then you had to generate the background color as well as the color text and "mix" them to produce video. RGB is kind of a strange animal as it can be RGB video and a separate sync or RGB with sync for each color (R-G-B). Maybe I was searching using the wrong search words and missed finding other chips?

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