General Information
Using the new 2x20 LCD NHD-C0220BA-FSW-FTW-3V3 display.
The data sheets are wrong and the VO contrast pin needs to be higher than stated. Using above 2V. This was a surprise! 2 days spent there.
When using a new part, new board and software is involved, then one never knows where the problem might be?
Also the sample start up code is for a serial unit and not the one in the data sheet. It is showing code for contrast which is not part of the device.
Finally getting some things to work.
However I cannot use the 2nd line. Also are the addresses for the second line correct? hex 40 for the start of the second line. Therefore command code for that address is hex C0
The value of hex38 should be the code for 8 bit display, 2 lines?
Anyone out there with start up commands?
Also I need to have these commands before anything appears hex38 and then hex30. The other way will not work
Thanks for any help.
Hi Folks,
I discovered my problem.
The Vo contrast level must be over 3V to work for a 2 line display.
Part of the specs that I viewed was wrong.
Long story of just misleading events creating design havoc.
Some information was confusing but regular commands work such as hex38 with the proper Vo level.
I was hoping Newhaven would monitor this Forum but I had to email separately.
The support person gave me some good clues. Thanks
The data sheets are wrong and the VO contrast pin needs to be higher than stated. Using above 2V. This was a surprise! 2 days spent there.
When using a new part, new board and software is involved, then one never knows where the problem might be?
Also the sample start up code is for a serial unit and not the one in the data sheet. It is showing code for contrast which is not part of the device.
Finally getting some things to work.
However I cannot use the 2nd line. Also are the addresses for the second line correct? hex 40 for the start of the second line. Therefore command code for that address is hex C0
The value of hex38 should be the code for 8 bit display, 2 lines?
Anyone out there with start up commands?
Also I need to have these commands before anything appears hex38 and then hex30. The other way will not work
Thanks for any help.
Hi Folks,
I discovered my problem.
The Vo contrast level must be over 3V to work for a 2 line display.
Part of the specs that I viewed was wrong.
Long story of just misleading events creating design havoc.
Some information was confusing but regular commands work such as hex38 with the proper Vo level.
I was hoping Newhaven would monitor this Forum but I had to email separately.
The support person gave me some good clues. Thanks
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Hi Aragorn,
It's good to hear you have this working after discussing the details by phone with one of our Applications Engineers.
Regards,0 -
Hi Aragorn,
I'm facing init issues using NHD-C0220BA-FSW-FTW-3V3.
Reading your post, I see specs and sample code have errors.
Not so easy to find what I'm doing wrong in this situation...
Could you please post your startup code ?
Thx !0 -
Hi Serge,
Please refer to our example code listed here : https://support.newhavendisplay.com/hc/en-us/articles/4415233794583-NHD-C0220BA-FSW-FTW-with-Arduino
Best Regards,
Ted
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