Author Topic: NHD-C0220Biz-FSW adds character 0x11 at begining of line  (Read 1449 times)

whAtlGa

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NHD-C0220Biz-FSW adds character 0x11 at begining of line
« on: July 06, 2016, 09:40:04 PM »
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.

« Last Edit: July 07, 2016, 08:23:33 AM by whAtlGa »

Saurabh_B

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Re: NHD-C0220Biz-FSW adds character 0x11 at begining of line
« Reply #1 on: July 08, 2016, 12:09:19 PM »
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?

whAtlGa

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Re: NHD-C0220Biz-FSW adds character 0x11 at begining of line
« Reply #2 on: July 08, 2016, 09:31:31 PM »
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.

Saurabh_B

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Re: NHD-C0220Biz-FSW adds character 0x11 at begining of line
« Reply #3 on: July 11, 2016, 08:20:40 AM »
Glad to see you have it working properly.  8)

 

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