NHD-5.0-800480FT-CTXL-CTP Startup Sequence

ed328

• November 09, 2021 16:33

I am working with a NHD-5.0-800480FT-CTXL-CTP display and am attempting to boot it up using the instructions from the programmers guide. I have provided the necessary power to the board and am following this sequence:

1. Driving PD_N high
2. waiting 200 ms
3. Following the initialization sequence (attached to this post) via SPI communication

(I am using an MSP430 as master and the display as slave)

I am not able to see the display boot up, so my question is are there any steps for boot up that I am missing for this particular LCD TFT controller?

Thanks for any help!

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  Zach P

  NHD Staff

  • November 15, 2021 16:19

  Hi ed328,
  
  Try adjusting the your values to the table below and let me know if you see improvement.
  
  

  

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  ed328

  • November 15, 2021 20:49

  So I believe I am getting stuck beforehand. After I run the commands:
  
  cmd(CLKEXT)
  cmd(ACTIVE)
  
  I try to read the REG_ID register to verify that it is 0x7C. However my read is returning FF instead. What could that mean?

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  ed328

  • November 16, 2021 10:36

  Does the LCD expect a certain clock phase/polarity by default when using an external clock?

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  Zach P

  NHD Staff

  • November 17, 2021 16:03

  Hi Ed,
  
  Please check out https://brtchip.com/softwareexamples-eve/ for EVE Framework. The BRT_AN_025 - Portable EVE Library has the application notes and source code that should be able to communicate with the FT813 IC.
  
  However you there is a problem accessing the links so it may be worth contacting Bridgetek to see if they can provide and information on the notes and code.

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