NHD-C0220Biz-FSW adds character 0x11 at begining of line

whAtlGa

• July 06, 2016 09:07

I probably missed something in the data sheet or in the set up.  Every time I have more that 16 characters on a line I get a symbol at the start of the line that looks like a cross or character 0x11 shown on page 10 of the data sheet.  Happens on both the 1st line and 2nd line. 

Update: After trying different lengths I get character 0x10 at 16 characters and it increases by one the longer the line goes. The text I send is displayed correctly there is just this extra character at the beginning of the line.

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  Saurabh_B

  • July 08, 2016 11:07

  Would it be possible to share the portion of the code where you are sending the characters?
  
  At many times random characters may appear when there is a timing issue. How fast are you writing to the display, and are you allowing a delay after every command?

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  whAtlGa

  • July 08, 2016 13:07

  That does seem to be the case.  The configuration went to the module a byte at the time but the text was handled with block writes.  I changed them to this:

  for x in range (0,len(Line1)):
  bus.write_byte_data(LCD,0x40,Line1

  That resolved the issue.
  
  Thank you for your assistance.

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  Saurabh_B

  • July 09, 2016 13:07

  Glad to see you have it working properly.

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