Not working Display with ST7789V Driver

[Tombo89]

Hello, i have a few Tfts from Newheaven Displays that only support 0 or 16 Bit Parallel Interface. Sadly they do not support SPI. The have a included ST7789V Driver. I tried to get them working with an esp32 Devkit and your Library.

I adaptet the user_setup.h as follows

#define ST7789_DRIVER

#define ESP32_PARALLEL

// The ESP32 and TFT the pins used for testing are:
#define TFT_CS   33  // Chip select control pin (library pulls permanently low
#define TFT_DC   15  // Data Command control pin - use a pin in the range 0-31
#define TFT_RST  32  // Reset pin, toggles on startup

#define TFT_WR    4  // Write strobe control pin - use a pin in the range 0-31
#define TFT_RD    2  // Read strobe control pin  - use a pin in the range 0-31

#define TFT_D0   12  // Must use pins in the range 0-31 for the data bus
#define TFT_D1   13  // so a single register write sets/clears all bits.
#define TFT_D2   26  // Pins can be randomly assigned, this does not affect
#define TFT_D3   25  // TFT screen update performance.
#define TFT_D4   17
#define TFT_D5   16
#define TFT_D6   27
#define TFT_D7   14

But I cant get the Display to work. Am I missing somthing?

If you are interested here is a link to the Display.

[http://www.newhavendisplay.com/nhd24240320cfcsxnf-p-9494.html]

[Bodmer]

Use the 8 bit mode, I see from the datasheet that this mode actually uses DB8-15 of the display. Are those the pins you have tried?

[Tombo89]

Hello, i was a little bit wrong in my first post. my pin definitions are as follow

#define TFT_CS   15  // Chip select control pin (library pulls permanently low
#define TFT_DC   5  // Data Command control pin - use a pin in the range 0-31
#define TFT_RST  18  // Reset pin, toggles on startup

#define TFT_WR    4  // Write strobe control pin - use a pin in the range 0-31
#define TFT_RD    2  // Read strobe control pin  - use a pin in the range 0-31

#define TFT_D0   13  // Must use pins in the range 0-31 for the data bus
#define TFT_D1   12  // so a single register write sets/clears all bits.
#define TFT_D2   14  // Pins can be randomly assigned, this does not affect
#define TFT_D3   27  // TFT screen update performance.
#define TFT_D4   26
#define TFT_D5   25
#define TFT_D6   23
#define TFT_D7   22

I hope they are ok. I tried it with DB0-7 and 8-15 on Display both with no result.

Edit: It seems i had a connection Issue on my board. Now i get something on the screen. I flashed the clock example and you can image it shows a clock but the screen is full of vertical Lines in different colours and everything looks a bit odd. Maybe there is some Issue with my Prototype connector. I ordered a new one and take a look at this.

[Bodmer]

Closing pending test results with new displays.