SPI Display Tontec MZ61581 , tested with an ESP32 DevKitC V4 and Arduino IDE 2.1.1 ( or PlatformIO 
)
- Display Tontec MZ61581-PI-EXT 2015.5.28
- Display controller R61581
- Touch controller XPT2046
- Altera EPM3032A
Display works fine with TFT_eSPI 2.5.31 and LVGL 8.3.10
The display works stable with 27MHz. 40MHz requires short cables. 80MHz works with a 10 ohm resistor (or a Schottky Diode) between ESP32-GND and MZ61581-GND, which increases the GND voltage of the display to 0.47V (0.3V). The display draws about 72mA. At the moment i use a 1N5819 Schottky diode. With a 1N4148 diode the backlight is not bright enough.
Speed (27MHz/40MHz/80MHz) : Bouncy_Circles 22/32/64fps, boing_ball 83/105/140fps, Sprite_Rotating 100/150/300fps.
SPI MOSI, MISO and CLK are used for Display and Touch.
| ESP32 GPIO | RPI/MZ61581 | RPI GPIO | TFT_eSPI | Description |
|---|---|---|---|---|
| 23 | MOSI | 10 | TFT_MOSI | SPI MOSI |
| 19 | MISO | 9 | TFT_MISO | SPI MISO |
| 18 | SCLK | 11 | TFT_SCLK | SPI SCLK |
| 2 | GPIO25 | 25 | TFT_DC | DC |
| EN | GPIO15 | 15 | TFT_RPI | RST |
| 15 | CE0 | 8 | TFT_CS | SPI CS (TFT) |
| 4 | CE1 | 7 | TOUCH_CS | SPI CS (Touch) |
| 5 | GPIO18 | 18 | TFT_BL | Backlight PWM |
| GPIO4 | 4 | Touch IRQ (not used) | ||
| GND | GND | |||
| 3V3 | 3.3V |
Connections :
With longer cables (15cm), only 27MHz were stable.
Many examples of the TFT_eSPI library are working fine except "TFT_ReadWrite_Test.ino" :
Pixel value written = 800
Pixel value read = FFFF
ERROR ^^^^
Same problem as with the similar ili9488 controller ?
- Arduino :
- Install the libraries "TFT_eSPI" and "lvgl".
- Copy the program file(s) from the folder "Arduino" and especially "Arduino/libraries", which contain all configuration files.
- Copy the folder "Arduino\libraries\lvgl\demos" to "Arduino\libraries\lvgl\ src\demos"
- Copy the folder "Arduino\libraries\lvgl\examples" to "Arduino\libraries\lvgl\ src\examples".
- Test/Benchmark : R61581_TFT_graphicstest
- Touch calibration : R61581_Touch_calibrate
- LVGL Demo : R61581_LVGL
- Configuration files :
- Arduino/libraries/TFT_eSPI/User_Setup_Select.h
- Arduino/libraries/Setup405_MZ61581.h
User_Setup_Select.h :
...
///////////////////////////////////////////////////////
// User configuration selection lines are below //
///////////////////////////////////////////////////////
// Only ONE line below should be uncommented to define your setup. Add extra lines and files as needed.
// Comment the following line, if you want to use custom setup file
//#include <User_Setup.h> // Default setup is root library folder
// Setup file in folder Arduino/libraries (updates will not overwrite your setups)
#include <../Setup405_MZ61581.h> // new : Setup file for R61581 3.5" RPI Touch Display
...User_Setup.h :
#define USER_SETUP_ID 405
// Driver
#define R61581_DRIVER
#define TFT_WIDTH 320
#define TFT_HEIGHT 480
// Pins
#define TFT_BL 5 // Backlight LED control pin
#define TFT_BACKLIGHT_ON LOW // Level to turn ON back-light (HIGH or LOW)
#define TFT_CS 15 // Chip select control pin
#define TFT_DC 2 // Data Command control pin
#define TFT_RST -1 // Set TFT_RST to -1 if the display RESET is connected to NodeMCU RST or 3.3V
//#define TFT_MISO 19 // default pins ESP32
//#define TFT_MOSI 23 // dito
//#define TFT_SCLK 18 // dito
#define TOUCH_CS 4 // Chip select pin (T_CS) of touch screen
// Fonts
#define LOAD_GLCD // Font 1. Original Adafruit 8 pixel font needs ~1820 bytes in FLASH
#define LOAD_FONT2 // Font 2. Small 16 pixel high font, needs ~3534 bytes in FLASH, 96 characters
#define LOAD_FONT4 // Font 4. Medium 26 pixel high font, needs ~5848 bytes in FLASH, 96 characters
#define LOAD_FONT6 // Font 6. Large 48 pixel font, needs ~2666 bytes in FLASH, only characters 1234567890:-.apm
#define LOAD_FONT7 // Font 7. 7 segment 48 pixel font, needs ~2438 bytes in FLASH, only characters 1234567890:.
#define LOAD_FONT8 // Font 8. Large 75 pixel font needs ~3256 bytes in FLASH, only characters 1234567890:-.
//#define LOAD_FONT8N // Font 8. Alternative to Font 8 above, slightly narrower, so 3 digits fit a 160 pixel TFT
#define LOAD_GFXFF // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts
#define SMOOTH_FONT
//#define SPI_FREQUENCY 20000000
//#define SPI_FREQUENCY 27000000 // ok
#define SPI_FREQUENCY 40000000 // ok with short cables
//#define SPI_FREQUENCY 80000000 // white screen
#define SPI_TOUCH_FREQUENCY 2500000
// #define SUPPORT_TRANSACTIONS