Need some Help with SSD1963 and RP2040

[Technikfreak2002]

Hello!
First of all, thank your awesome library!
I have some trouble with a SSD1963 Display. It works fine with an ESP32, 8 bit mode, SSD1963_DIVERALT, and RGB order.
But if i use another MCU, in this case a Pi Pico, i get only wired colors and pixel garbage on the screen.
I also tried some STM32 boards, with no luck. STM32F103, STM32F411 (Blue and Black Pill) Nucleo64 L476RG and Nucleo144 H743ZI2.
for every test i made a user setup to set the correct pins. but no luck.
Other display drivers, like the ILI9486, work with the pico and at with the nucleo64.

Can some give me a hint? am i missing a bit?

Thank you very much and a happy new year! :D

[Bodmer]

Post your setup file for the Pico. Try a slower CPU clock speed.

[Technikfreak2002]

Hello Bodmer!
Thank you for your reply!
I used Setup_103 and added SSD1963 driver for use with the pico. For the esp32 Setup_50 unmodified.
Clock speed was sefault 133MHz but i also tested down to 50MHz.
I use arduino IDE 1.8.19 with Pico SDK from earlephilhower.
For reference, the Pico / display combination works fine with PicoMite. Different pins, but same display and same wires.

I make a small PCB today to keep the wires as short as possible and give it a try.

`
// This setup is for the RP2040 processor only when used with 8 bit parallel displays
// See SetupX_Template.h for all options available
#define USER_SETUP_ID 103

////////////////////////////////////////////////////////////////////////////////////////////
// Interface
////////////////////////////////////////////////////////////////////////////////////////////
#define TFT_PARALLEL_8_BIT

////////////////////////////////////////////////////////////////////////////////////////////
// Display driver type
////////////////////////////////////////////////////////////////////////////////////////////
//#define ILI9486_DRIVER
//#define SSD1963_480_DRIVER // 272 x 480 display
//#define SSD1963_800_DRIVER // 480 x 800 display
#define SSD1963_800ALT_DRIVER // Alternative 480 x 800 display
//#define SSD1963_800BD_DRIVER // 480 x 800 display sourced from https://www.buydisplay.com/7-tft-screen-touch-lcd-display-module-w-ssd1963-controller-board-mcu

#define TFT_RGB_ORDER TFT_RGB // Colour order Red-Green-Blue
//#define TFT_RGB_ORDER TFT_BGR // Colour order Blue-Green-Red

////////////////////////////////////////////////////////////////////////////////////////////
// RP2040 pins used
////////////////////////////////////////////////////////////////////////////////////////////

//#define TFT_CS -1 // Do not define, chip select control pin permanently connected to 0V

// These pins can be moved and are controlled directly by the library software
#define TFT_DC 28 // Data Command control pin
#define TFT_RST 27 // Reset pin

//#define TFT_RD -1 // Do not define, read pin permanently connected to 3V3

// Note: All the following pins are PIO hardware configured and driven
// The pins are hard-coded at the moment and must not be changed here
// Connections MUST use the pins below
#define TFT_WR 22

// PIO requires these to be sequentially increasing - do not change
#define TFT_D0 6
#define TFT_D1 7
#define TFT_D2 8
#define TFT_D3 9
#define TFT_D4 10
#define TFT_D5 11
#define TFT_D6 12
#define TFT_D7 13
//*/

////////////////////////////////////////////////////////////////////////////////////////////
// Fonts to be available
////////////////////////////////////////////////////////////////////////////////////////////
#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_GFXFF // FreeFonts. Include access to the 48 Adafruit_GFX free fonts FF1 to FF48 and custom fonts

#define SMOOTH_FONT

////////////////////////////////////////////////////////////////////////////////////////////
`

[Bodmer]

Which version of TFT_eSPI are you using?

[Technikfreak2002]

I'm using 2.4.79.
I made some tests with a small breadboard PCB and wires as short as possible. The SSD1963 does not work and a second Display with ILI9341 8Bit also does not work.
To make sure i wired all correct i tested all with mcufriend_kvb. And all works. Here is the pin definition code inside mcfriend_special.h
`
//################################### RP2040 ##############################
#elif defined(USE_MY_PICO) && defined(ARDUINO_ARCH_RP2040) //regular UNO shield on PICO
//LCD pins |D7 |D6 |D5 |D4 |D3 |D2 |D1 |D0 | |RD |WR |RS |CS |RST | |
//RP2040 pin|GP13|GP12|GP11|GP10|GP9 |GP8|GP19|GP18| |GP14|GP26|GP27|GP28|GP16|GP17|
//BODMER pin|GP13|GP12|GP11|GP10|GP9 |GP8|GP7 |GP6 | |GP14|GP22|GP27|GP28|GP16|GP17|
//UNO pins |7 |6 |5 |4 |3 |2 |9 |8 | |A0 |A1 |A2 |A3 |A4 |A5 |
//LCD pins |CS |MOSI|MISO|SCK | |SDA|SCL|
//RP2040 pin|GP21|GP3 |GP4 |GP2 | |GP6|GP7|
//UNO pins |10 |11 |12 |13 | |18 |19 |

#define USE_BODMER

#define WRITE_DELAY { WR_ACTIVE4; }
#define IDLE_DELAY { WR_IDLE; }
#define READ_DELAY { RD_ACTIVE8; }

#define RD_PORT sio_hw
#define RD_PIN 14
#define WR_PORT sio_hw
#define WR_PIN 26
#define CD_PORT sio_hw
#define CD_PIN 27
#define CS_PORT sio_hw
#define CS_PIN 28
#define RESET_PORT sio_hw
#define RESET_PIN 16

#define LMASK (0x03 << 18)
#define HMASK (0xFC << 6)
#if defined(USE_BODMER)
#define WR_PIN 22
#define CD_PIN 28
#define CS_PIN 16
#define RESET_PIN 27
#define LMASK (0x00 << 18)
#define HMASK (0xFF << 6)
#endif
#define GPMASK (LMASK | HMASK) //more intuitive style for mixed Ports
#define write_8(x) { sio_hw->gpio_clr = GPMASK;
sio_hw->gpio_set = (((x) << 18) & LMASK) | (((x) << 6) & HMASK);
}
#define read_8() ( ((sio_hw->gpio_in & HMASK) >> 6) | ((sio_hw->gpio_in & LMASK) >> 18) )
#define setWriteDir() { sio_hw->gpio_oe_set = GPMASK; }
#define setReadDir() { sio_hw->gpio_oe_clr = GPMASK; }
#define GPIO_INIT() {for (int i = 6; i <= 14; i++) pinMode(i, OUTPUT); for (int i = 16; i <= 28; i++) pinMode(i, OUTPUT);}
#define write8(x) { write_8(x); WRITE_DELAY; WR_STROBE; IDLE_DELAY; }
#define write16(x) { uint8_t h = (x)>>8, l = x; write8(h); write8(l); }
#define READ_8(dst) { RD_STROBE; READ_DELAY; dst = read_8(); RD_IDLE2; RD_IDLE; }
#define READ_16(dst) { uint8_t hi; READ_8(hi); READ_8(dst); dst |= (hi << 8); }

#define PIN_LOW(port, pin) (port)->gpio_clr = (1<<(pin))
#define PIN_HIGH(port, pin) (port)->gpio_set = (1<<(pin))
#define PIN_OUTPUT(port, pin) (port)->gpio_oe_set = (1<<(pin))
`

[Bodmer]

Have you wired CS pin on display to GND, and RD pin on display to 3.3V when using TFT_eSPI?

[Technikfreak2002]

Yes. Also with mcufriend.

[Bodmer]

I have raised an issue as it should work with your setup. Thanks for reporting this.

[Technikfreak2002]

Thank You very much! I will follow the progress!

[Bodmer]

Fixed in master library. Thanks for repporting this.

[Technikfreak2002]

Hello! Sorry for my late reply!
I tested the new version. And it works! Thank you so much!