ST7529 240x160 Display Support?

[WaldobertDE]

Hey, I was able to salvage some "Topway LM240160DCW" Displays.

Can I use the U8G2_UC1611_EW50850_F_8080 u8g2(U8G2_R0, 8, 9, 10, 11, 4, 5, 6, 7, /*enable=*/ 18, /*cs=*/ 3, /*dc=*/ 16, /*reset=*/ 17); // 240x160, Connect RD/WR1 pin with 3.3V, CS is aktive high Constructor? (It is the only one with this size) How do I connect the Pins to my ESP32? Is (Pin 8 -> DB0), (Pin 9 -> DB1) etc. the right order?

Thanks

Datasheet: https://www.topwaydisplay.com/sites/default/files/2020-02/LM240160DCW.pdf

Pins are as following:	Pin No.	Pin Name	I/O	Descriptions
1	VDD	Power	Positive Power Supply
2	VSS	Power	0V Supply, Ground (0V)
3	/CS	Input	Chip Select /CS=LOW : Data IO is enabled
4	RS	Input	Register Select RS=HIGH: data on DB0 to DB7 is display data RS=LOW: data 0n DB0 to DB7 is control data
5	/WR	Input	Write enable input, active LOW
6	/RD	INPUT	Read enable input, active LOW
7	DB0	IO	Bi-directional data bus
8	DB1	IO	Bi-directional data bus
9	DB2	IO	Bi-directional data bus
10	DB3	IO	Bi-directional data bus
11	DB4	IO	Bi-directional data bus
12	DB5	IO	Bi-directional data bus
13	DB6	IO	Bi-directional data bus
14	DB7	IO	Bi-directional data bus
15	/RST	Input	Reset: /RST=LOW: Initialization is executed /RST=HIGH: Normal
16	BLA	Power	Backlight Positive Power Supply

Image:

[olikraus]

How do I connect the Pins to my ESP32? Is (Pin 8 -> DB0), (Pin 9 -> DB1) etc. the right order?

Anything is fine, you just need to put the pin numbers in the correct order for the U8g2 Constructor. My suggestion is to add one more column into your table above and add the ESP32 pin number to which the display port is connected.

Notes:

• DC = RS
• /RD is not used and must be pulled high
• /WR is the enable signal as mentioned in the constructor

One more point: Is the ST7529 compatible to the UC1611? I mean, I am not sure whether the UC1611 constructor can be used to drive a ST7529 display.

[WaldobertDE]

Anything is fine, you just need to put the pin numbers in the correct order for the U8g2 Constructor. My suggestion is to add one more column into your table above and add the ESP32 pin number to which the display port is connected.

Updated table:

ESP32 DevBoardC GPIO	Display Pin No.	Pin Name	I/O	Descriptions
3V3	1	VDD	Power	Positive Power Supply
GND	2	VSS	Power	0V Supply, Ground (0V)
23	3	/CS	Input	Chip Select /CS=LOW : Data IO is enabled
22	4	RS	Input	Register Select RS=HIGH: data on DB0 to DB7 is display data RS=LOW: data 0n DB0 to DB7 is control data
15	5	/WR	Input	Write enable input, active LOW
3V3	6	/RD	INPUT	Read enable input, active LOW
21	7	DB0	IO	Bi-directional data bus
19	8	DB1	IO	Bi-directional data bus
18	9	DB2	IO	Bi-directional data bus
5	10	DB3	IO	Bi-directional data bus
17	11	DB4	IO	Bi-directional data bus
16	12	DB5	IO	Bi-directional data bus
4	13	DB6	IO	Bi-directional data bus
0	14	DB7	IO	Bi-directional data bus
2	15	/RST	Input	Reset: /RST=LOW: Initialization is executed /RST=HIGH: Normal
3V3	16	BLA	Power	Backlight Positive Power Supply

One more point: Is the ST7529 compatible to the UC1611? I mean, I am not sure whether the UC1611 constructor can be used to drive a ST7529 display

My fault. Didn't see the github link to the constructors in the .ino example. Tried every Constructor for the 240x160 Resolution. As far as I can see, the display (ST7529?) is not supported by the library. Is there any chance that you will add support for the display?

[olikraus]

I had a look into the ST7529 datasheet from here: https://www.crystalfontz.com/controllers/Sitronix/ST7529/ It looks very complicated. At least what I can say: It will be slow. And: U8g2 in general is a monochrome lib, so you have a 32 level grayscale display, but only two levels of all 32 levels will be supported. Moreover, u8g2 still needs to transfer 5 bit for each pixel.

To add support, I need a similar display with the same controller. There is on option here: https://aliexpress.com/item/1751722020.html but this display has a flex connector only.

All in all it will be difficult and I am not sure whether it will make sense... Displays with the ST75256 controller hare more common, are available with the same dimensions and are supported by u8g2.