MCU Friend Shield ID

This is an MCU Friend 3.5" Shield

I have no idea what the LCD Driver is.... Any hints would be appreciated.

Alan www.iotexpert.com

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)

diagnose any controller reg(0x0000) 00 00 ID: ILI9320, ILI9325, ILI9335, ... reg(0x0004) 00 00 94 03 Manufacturer ID reg(0x0009) 00 00 61 00 00 Status Register reg(0x000A) 08 08 Get Powsr Mode reg(0x000C) 66 66 Get Pixel Format reg(0x0030) 00 00 00 00 00 PTLAR reg(0x0033) 00 00 00 00 00 00 00 VSCRLDEF 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(0x00B3) 00 00 00 00 00 Frame Memory reg(0x00B4) 00 00 Frame Mode 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(0x00C1) 00 00 00 00 Display Timing reg(0x00C5) 00 00 Frame Rate reg(0x00C8) 00 00 00 00 00 00 00 00 00 00 00 00 00 GAMMA reg(0x00CC) 00 00 Panel Control reg(0x00D0) E0 E0 01 E0 Power Control reg(0x00D1) E1 E1 01 E1 VCOM Control reg(0x00D2) E0 E0 01 Power Normal reg(0x00D3) 00 00 94 03 ILI9341, ILI9488 reg(0x00D4) E1 E1 01 E1 Novatek reg(0x00DA) 00 00 RDID1 reg(0x00DB) 94 94 RDID2 reg(0x00DC) 03 03 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

Your controller has:

reg(0x00D3) 00 00 94 03   ILI9341, ILI9488
...
reg(0x00DA) 00 00   RDID1
reg(0x00DB) 94 94   RDID2
reg(0x00DC) 03 03   RDID3

I have no idea what manufacturer it is. It looks like a regular MIPI controller with ID = 0x9403.

A 3.5 inch shield is normally 320x480. I would just try tft.begin(0x9090); and see if you get some response.

David.

Thanks for you response...

I have been digging on this identify issue only for morbid curiosity... but I have reached the conclusion that I am just going to purchase known TFTs

The whole thing has mostly been a distraction from what I am trying to do... and the library Im using doesn't even support that driver...

If you like, email me your address and Ill mail you all three of these shields when I get back home next week.

Alan engineer@iotexpert.com

Ebay displays are cheap because they probably use surplus components.

Imagine that you have a warehouse full of replacement screens for a year 2007 mobile phone. You can sell them, to repair shops for a few years even when the phones are obsolete.

There comes a time when you just have to get rid of them. That is why God invented Ebay.

I am happy to resolve any problems between two RM68140 shields. And I am quite keen to get your mystery 0x9403 shield working.

You bought them. So I presume you have an intended use for them. We can resolve most things over this Forum or GitHub. With luck, we can get everything working 100%.

It is only worth mailing the shields if you live in the UK. They fit (with foam) in a 25mm deep cardboard box as a "Large Letter". Mailing to other countries costs about the same as you paid the Chinese shop in the first place.

David.