Hi. So i bought mcufriend 2.8 tft screen, installed mcufriend_kbv and adafruit-gtx library when i tried the graphics example my screen just give me the white screen. I looked this up in the net and saw supporting the ic issue i give it a support test and turns out my ic is the one the library is writen for so no problem on that but i couldnt make it work.Is there anyone who can help me? Thanks in advance
Always install libraries via the Library Manager.
Run the examples that come with the library.
Most examples report the ID and some diagnostic information to the Serial Terminal at 9600 baud.
Copy-paste directly from the Serial Terminal to your message here. (Please select a Code window with </> icon)
David.
iagnose whether this controller is supported
There are FAQs in extras/mcufriend_how_to.txt
tft.readID() finds: ID = 0xD3D3
MCUFRIEND_kbv version: 2.9.8
Probably a write-only Mega2560 Shield
Try to force ID = 0x9481
PORTRAIT is 320 x 480
Run the examples/graphictest_kbv sketch
All colours, text, directions, rotations, scrolls
should work. If there is a problem, make notes on paper
Post accurate description of problem to Forum
Or post a link to a video (or photos)
I rely on good information from remote users
this is the result of the support test but i figured out that sometimes the program stuck after says your id is 0xD3D3 and sometimes it says avrdude: content mismatch
Mcufriend 2.8 inch shields are Blue and fit on a Uno.
0xD3D3 implies that you have a Red shield that is made for a Mega2560 i.e. it has too many pins for a Uno.
Please post a link to the actual screen that you have bought.
Plug it into a Uno. Run the LCD_ID_readreg example. Paste here.
David.
Sorry. I had exams so i couldnt test the thing you said but i can say that my shield is blue and it has just enough pins for uno. I mean its a uno shield. Besides they send it with a uno.
I will send its pictures when i am avaliable
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) C0 C0 ID: ILI9320, ILI9325, ILI9335, ...
reg(0x0004) C4 C4 C4 C4 Manufacturer ID
reg(0x0009) C9 C9 C9 C9 C9 Status Register
reg(0x000A) CA CA Get Power Mode
reg(0x000C) CC CC Get Pixel Format
reg(0x0061) E1 E1 RDID1 HX8347-G
reg(0x0062) E2 E2 RDID2 HX8347-G
reg(0x0063) E3 E3 RDID3 HX8347-G
reg(0x0064) E4 E4 RDID1 HX8347-A
reg(0x0065) E5 E5 RDID2 HX8347-A
reg(0x0066) E6 E6 RDID3 HX8347-A
reg(0x0067) E7 E7 RDID Himax HX8347-A
reg(0x0070) F0 F0 Panel Himax HX8347-A
reg(0x00A1) E1 E1 E1 E1 E1 RD_DDB SSD1963
reg(0x00B0) F0 F0 RGB Interface Signal Control
reg(0x00B4) F4 F4 Inversion Control
reg(0x00B6) F6 F6 F6 F6 F6 Display Control
reg(0x00B7) F7 F7 Entry Mode Set
reg(0x00BF) FF FF FF FF FF FF ILI9481, HX8357-B
reg(0x00C0) C0 C0 C0 C0 C0 C0 C0 C0 C0 Panel Control
reg(0x00C8) C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 GAMMA
reg(0x00CC) CC CC Panel Control
reg(0x00D0) D0 D0 D0 Power Control
reg(0x00D2) D2 D2 D2 D2 D2 NVM Read
reg(0x00D3) D3 D3 D3 D3 ILI9341, ILI9488
reg(0x00D4) D4 D4 D4 D4 Novatek ID
reg(0x00DA) DA DA RDID1
reg(0x00DB) DB DB RDID2
reg(0x00DC) DC DC RDID3
reg(0x00E0) E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 GAMMA-P
reg(0x00E1) E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 GAMMA-N
reg(0x00EF) EF EF EF EF EF EF ILI9327
reg(0x00F2) F2 F2 F2 F2 F2 F2 F2 F2 F2 F2 F2 F2 Adjust Control 2
reg(0x00F6) F6 F6 F6 F6 Interface Control
this is the result of lcd_id_readreg
Your readreg report just shows bits 6, 7 high e.g. 0xC0
This implies that you have not plugged the shield into the Uno properly. Every male pin should mate with a corresponding female.
Try a different Uno.
David.
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) C0 C0 ID: ILI9320, ILI9325, ILI9335, ...
reg(0x0004) C4 C4 C4 C4 Manufacturer ID
reg(0x0009) C9 C9 C9 C9 C9 Status Register
reg(0x000A) CA CA Get Power Mode
reg(0x000C) CC CC Get Pixel Format
reg(0x0061) E1 E1 RDID1 HX8347-G
reg(0x0062) E2 E2 RDID2 HX8347-G
reg(0x0063) E3 E3 RDID3 HX8347-G
reg(0x0064) E4 E4 RDID1 HX8347-A
reg(0x0065) E5 E5 RDID2 HX8347-A
reg(0x0066) E6 E6 RDID3 HX8347-A
reg(0x0067) E7 E7 RDID Himax HX8347-A
reg(0x0070) F0 F0 Panel Himax HX8347-A
reg(0x00A1) E1 E1 E1 E1 E1 RD_DDB SSD1963
reg(0x00B0) F0 F0 RGB Interface Signal Control
reg(0x00B4) F4 F4 Inversion Control
reg(0x00B6) F6 F6 F6 F6 F6 Display Control
reg(0x00B7) F7 F7 Entry Mode Set
reg(0x00BF) FF FF FF FF FF FF ILI9481, HX8357-B
reg(0x00C0) C0 C0 C0 C0 C0 C0 C0 C0 C0 Panel Control
reg(0x00C8) C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 GAMMA
reg(0x00CC) CC CC Panel Control
reg(0x00D0) D0 D0 D0 Power Control
reg(0x00D2) D2 D2 D2 D2 D2 NVM Read
reg(0x00D3) D3 D3 D3 D3 ILI9341, ILI9488
reg(0x00D4) D4 D4 D4 D4 Novatek ID
reg(0x00DA) DA DA RDID1
reg(0x00DB) DB DB RDID2
reg(0x00DC) DC DC RDID3
reg(0x00E0) E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 E0 GAMMA-P
reg(0x00E1) E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 E1 GAMMA-N
reg(0x00EF) EF EF EF EF EF EF ILI9327
reg(0x00F2) F2 F2 F2 F2 F2 F2 F2 F2 F2 F2 F2 F2 Adjust Control 2
reg(0x00F6) F6 F6 F6 F6 Interface Control
this is the result with another uno and i checked the pins in the sketch with the board and they are all wired correctly.
That confirms that your Uno is ok. The problem is the shield.
Have you tried simply forcing tft.begin(0x9320) ?
Most controllers are read-write. Most can read all their registers.
However some can only read GRAM and perhaps an ID register.
For example SPFD5408 only reads 0x00 and 0x22
And SSD1289 returns ID for every read except 0x22 (GRAM)
Please edit the readreg sketch to test every register. I suspect that you get the same results i.e. 0xC0 + reg.
If you do find some meaningful registers, paste the result.
Otherwise just accept that you have a damaged shield. Ask for a refund.
David.
ı alreadt tried forcing ids that didnt work. So i guess the shield is dead. Thanks for your help.