I have an original Arduino Robot LCD, when running the graficstest.ino the screen stays blank. I double-checked the connections (to a Leonardo clone, it works as I've used it with other devices), and everything's connected as indicated. From the diagnose tool, I used:
tft.begin(0x9481);
I've also used 0x9325, 0x9328, 0x7575, 0x9341, 0x8357 and 0x9488.
The diagnose_TFT_support.ino gave the following results:
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
Then the LCD_ID_readreg.ino gave the following results:
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 00 ID: ILI9320, ILI9325, ILI9335, ...
reg(0x0004) 04 04 04 04 Manufacturer ID
reg(0x0009) 09 09 09 09 09 Status Register
reg(0x000A) 0A 0A Get Power Mode
reg(0x000C) 0C 0C Get Pixel Format
reg(0x0061) 61 61 RDID1 HX8347-G
reg(0x0062) 62 62 RDID2 HX8347-G
reg(0x0063) 63 63 RDID3 HX8347-G
reg(0x0064) 64 64 RDID1 HX8347-A
reg(0x0065) 65 65 RDID2 HX8347-A
reg(0x0066) 66 66 RDID3 HX8347-A
reg(0x0067) 67 67 RDID Himax HX8347-A
reg(0x0070) 70 70 Panel Himax HX8347-A
reg(0x00A1) A1 A1 A1 A1 A1 RD_DDB SSD1963
reg(0x00B0) B0 B0 RGB Interface Signal Control
reg(0x00B4) B4 B4 Inversion Control
reg(0x00B6) B6 B6 B6 B6 B6 Display Control
reg(0x00B7) B7 B7 Entry Mode Set
reg(0x00BF) BF BF BF BF BF BF 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 C0 C0 C0 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
If anyone has any idea on what's going wrong (including if you think the display is defective), I'll really appreciate your help.
