need help on display problem


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  1. #1


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    Default my leds work but my lcd still sleeping..

    hi there..thanks alot.. its realy help..my leds working...but still my lcd wont work..maybe i should check the wiring back..but..still i dont get it..how come ur code make it work but mine not..coz i dont see a big different in ur code..whats wrong with mine?..if u have a time..do plz explain to me

    thanks again..

  2. #2
    skimask's Avatar
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    Quote Originally Posted by sixty9sandals View Post
    hi there..thanks alot.. its realy help..my leds working...but still my lcd wont work..maybe i should check the wiring back..but..still i dont get it..how come ur code make it work but mine not..coz i dont see a big different in ur code..whats wrong with mine?..if u have a time..do plz explain to me

    thanks again..
    Try looking for the word 'END' in my code, then try looking for the word 'END' in your code, finally, try looking for the word 'END' in the little green manual.

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    Default ic..i get it now..

    i never think that such a small mistake have make me lost 2 days of my life ,figure out what went wrong...again..thanks alot for this wonderful lesson..u have no idea how smiling im now..now im trying to figure out what error ive done in my wiring..hope it wont take my other 2 days of my life...

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    Quote Originally Posted by sixty9sandals View Post
    i never think that such a small mistake have make me lost 2 days of my life ,figure out what went wrong...again..thanks alot for this wonderful lesson..u have no idea how smiling im now..now im trying to figure out what error ive done in my wiring..hope it wont take my other 2 days of my life...
    Give the LCD at least a second of 'pause' before you try to write to it. Change the data_us and command_us (as described in the green book) to 2000 for command and about 200 for data (but not over 255, byte value for data_us).
    If that doesn't work, play with the contrast voltages, vary it from ground to Vcc on the LCD, hold the LCD at crazy angles and see if you can see anything on it.

  5. #5


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    Default new prob..

    i ve recheck all the wiring..n its all just like the diagram..n ive also have check the define as what u have advice me..but now..my lcd do display something..a gud news for me..but the bad news is..it keep displays 2 line of black boxes..why is that happen?

  6. #6
    Join Date
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    Contrast isnt correctly set.
    Keith

    www.diyha.co.uk
    www.kat5.tv

  7. #7
    skimask's Avatar
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    Quote Originally Posted by sixty9sandals View Post
    i ve recheck all the wiring..n its all just like the diagram..n ive also have check the define as what u have advice me..but now..my lcd do display something..a gud news for me..but the bad news is..it keep displays 2 line of black boxes..why is that happen?
    But...have you varied the voltage on the contrast pins...like I said in the post above!
    In my experience, 2 rows of black boxes sometimes indicates not enough start up time.

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    Quote Originally Posted by skimask View Post
    But...have you varied the voltage on the contrast pins...like I said in the post above!
    In my experience, 2 rows of black boxes sometimes indicates not enough start up time.
    hi skinmask

    ive done as what u advice me..adjusting the contrast value of the lcd..still..it wont work..either it wont display anything or the sreen slowly turn into black box..so..now im looking for its start time as u say it might have not enough time..so..can u advice on how to solve its time..ive put of LCD_INITMS 5000 and several pause value 5000..still i cant work..

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