White screen on raspberry pi boot up

[charlieprynn]

Hi,

My screen is constantly white, with the back light on. Even when running the demos.

Can you tell which model of board I have?

[nopnop2002]

Please use this tool.

https://github.com/nopnop2002/lcd_id

And check this page.

http://domoticx.com/arduino-shield-2-4-tft-lcd-touch/

[charlieprynn]

The output from LCD_ID, I can't quite identify which model I have?

Read Registers on MCUFRIEND UNO shield
controllers either read as single 16-bit
e.g. the ID is at readReg(0)
or as a sequence of 8-bit values
in special locations (first is dummy)
reg(0x0000) 00 01   ID: ILI9320, ILI9325, ILI9335, ...
reg(0x0004) 00 00 00 00 Manufacturer ID
reg(0x0009) 00 00 00 00 00  Status Register
reg(0x000a) 00 01   Get Powsr Mode
reg(0x000c) 00 01   Get Pixel Format
reg(0x0061) 00 01   RDID1 HX8347-G
reg(0x0062) 00 01   RDID2 HX8347-G
reg(0x0063) 00 01   RDID3 HX8347-G
reg(0x0064) 00 01   RDID1 HX8347-A
reg(0x0065) 00 01   RDID2 HX8347-A
reg(0x0066) 00 01   RDID3 HX8347-A
reg(0x0067) 00 01   RDID Himax HX8347-A
reg(0x0070) 00 01   Panel Himax HX8347-A
reg(0x00a1) 00 01 00 01 00  RD_DDB SSD1963
reg(0x00b0) 00 01   RGB Interface Signal Control
reg(0x00b4) 00 01   Inversion Control
reg(0x00b6) 00 01 00 01 00  Display Control
reg(0x00b7) 00 01   Entry Mode Set
reg(0x00bf) 00 01 00 01 00 01   ILI9481, HX8357-B
reg(0x00c0) 00 01 00 01 00 01 00 01 00  Panel Control
reg(0x00c8) f8 00 f8 00 f8 00 f8 00 f8 00 f8 00 f8  GAMMA
reg(0x00cc) 00 01   Panel Control
reg(0x00d0) 00 01 00    Power Control
reg(0x00d2) f8 00 f8 00 f8  NVM Read
reg(0x00d3) 00 01 00 01 ILI9341, ILI9488
reg(0x00da) 00 01   RDID1
reg(0x00db) 00 01   RDID2
reg(0x00dc) 00 01   RDID3
reg(0x00e0) 00 01 00 01 00 01 00 01 00 01 00 01 00 01 00 01 GAMMA-P
reg(0x00e1) 00 01 00 01 00 01 00 01 00 01 00 01 00 01 00 01 GAMMA-N
reg(0x00ef) 00 01 00 01 00 01   ILI9327
reg(0x00f2) 00 01 00 01 00 01 00 01 00 01 00 01 Adjust Control 2
reg(0x00f6) 00 01 00 01 Interface Control

[nopnop2002]

Your TFT is TFT no one knows.

[charlieprynn]

Does that I'm SOL?

[nopnop2002]

It's the same outward appearance, but mcufriend has a lot of variations.

No one can use some of these.

[fisht99]

Hi there.

My screen is also white although it does flash during the demo.

I am using R61509V tft 3.0" and Raspberrypi 3

e.g. the ID is at readReg(0) or as a sequence of 8-bit values in special locations (first is dummy) reg(0x0000) b5 09 ID: ILI9320, ILI9325, ILI9335, ... reg(0x0004) 00 00 00 00 Manufacturer ID reg(0x0009) 00 01 00 01 00 Status Register reg(0x000a) 00 00 Get Powsr Mode reg(0x000c) 00 00 Get Pixel Format reg(0x0061) 00 00 RDID1 HX8347-G reg(0x0062) 00 00 RDID2 HX8347-G reg(0x0063) 00 00 RDID3 HX8347-G reg(0x0064) 00 00 RDID1 HX8347-A reg(0x0065) 00 00 RDID2 HX8347-A reg(0x0066) 00 00 RDID3 HX8347-A reg(0x0067) 00 00 RDID Himax HX8347-A reg(0x0070) 00 00 Panel Himax HX8347-A reg(0x00a1) 00 00 00 00 00 RD_DDB SSD1963 reg(0x00b0) 00 00 RGB Interface Signal Control reg(0x00b4) 00 00 Inversion Control reg(0x00b6) 00 00 00 00 00 Display Control reg(0x00b7) 00 00 Entry Mode Set reg(0x00bf) 00 00 00 00 00 00 ILI9481, HX8357-B reg(0x00c0) 00 00 00 00 00 00 00 00 00 Panel Control reg(0x00c8) 00 00 00 00 00 00 00 00 00 00 00 00 00 GAMMA reg(0x00cc) 00 00 Panel Control reg(0x00d0) 00 00 00 Power Control reg(0x00d2) 00 00 00 00 00 NVM Read reg(0x00d3) 00 00 00 00 ILI9341, ILI9488 reg(0x00da) 00 00 RDID1 reg(0x00db) 00 00 RDID2 reg(0x00dc) 00 00 RDID3 reg(0x00e0) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 GAMMA-P reg(0x00e1) 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 GAMMA-N reg(0x00ef) 00 00 00 00 00 00 ILI9327 reg(0x00f2) 00 00 00 00 00 00 00 00 00 00 00 00 Adjust Control 2 reg(0x00f6) 00 00 00 00 Interface Control

[nopnop2002]

The R61509V is a little different.

My R61509V has a regulator. Normally, a TFT with a regulator works at 5V, but my R61509V doesn't work unless I supply both 5V and 3.3V.

It's mine.

$ gpio -v
gpio version: 2.50
Copyright (c) 2012-2018 Gordon Henderson
This is free software with ABSOLUTELY NO WARRANTY.
For details type: gpio -warranty

Raspberry Pi Details:
  Type: Pi 2, Revision: 01, Memory: 1024MB, Maker: Sony
  * Device tree is enabled.
  *--> Raspberry Pi 2 Model B Rev 1.1
  * This Raspberry Pi supports user-level GPIO access.

$ uname -a
Linux raspberrypi 4.19.66-v7+ #1253 SMP Thu Aug 15 11:49:46 BST 2019 armv7l GNU/Linux

[fisht99]

Thank you for your reply.

I have tried 5v as well and still doesn't work correctly. However the screen does flash momentarily with 5v and you can see the colour bars briefly.

I am curious how to hookup both 5v and 3v to the board. are you able to share your diagram?

Thanks again for your support and community contribution.

[nopnop2002]

This is Mine. I made an adapter.

Orange is 3.3V. Yellow is 5V. White is GND.

[fisht99]

Hi there

Can you specify what pins on the tft you connect the 3.3 and 5v?

this is my tft

[nopnop2002]

This is my TFT.

[fisht99]

Thanks I think mine could be faulty. i will just buy another

[nopnop2002]

The latest version officially supports OPEN-SMART R61509V 16Pin-Parallel.