ST7701S 480x480 display support #35
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Dear moononournation!
Can You please help me how to implement it into Your library? I have init code from manufacturer: I am really looking forward to find a way to use this display. Your library seems to be the only one for now to support 9-bit SPI displays. I am ready to suport You with donation if You can make it work. |
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Replies: 12 comments 40 replies
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When I search ST7701 on online shop, it always show data port is SPI+RGB. That means it requires 3 pins(SPI) + 24 pins(RGB)for driving it. Only ESP32 S2 have enough pins driving it, so I will try it when the ESP32 S2 support on Arduino IDE is ready. |
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@Myzhazha @moononournation 请问ST7701有移植到ESP32 或ESP32 S2吗？ESP32 S2的IO应该足够了 |
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It seems you can reduce the required pins while limiting the colorspace, in that mode you only need 16 bits for the color (see page 73 of https://focuslcds.com/content/ST7701S_SPEC_%20V1.2.pdf) But the documentation also states that you can use 16bit SPI. It is not that clear for me if the RGB lines are still required when that mode is used. Can you help me out? |
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Indeed, specification PDF says: |
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Well, you now have the ESP32 S3. It should have more than enough IOs for a 40-pin LCD based on the ST7701 for instance this one, sold on AliExpress https://s.click.aliexpress.com/e/_DEGWvrX. Have a look at this repository with one PCB implementation of it: https://github.com/W00ng/ESP32-S3-RGB-Panel It has that 4inch LCD working plus a SD Card slot all connected to the same MCU |
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Arduino_ GFX now supports ST7701S 480 * 480 RGB screen, and uses ST7701s type1 mode. I also drew PCB for this purpose. Open source address: https://oshwhub.com/myzhazha/esp32s3_86-kai-fa-ban |
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Hello, I find library for ST7701S (320x820) and ESP32. I have init code from manufacturer. |
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https://www.alibaba.com/product-detail/new-IPS-3-2inch-bar-type_1600114450790.html |
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init_ST7701S_320x820.txt |
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If ESP32 has little GPIO, I can use STM32. |
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many vendor provide STM32 sample code, you can try it first |
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@moononournation Maybe ESP32S3 is suitable, it supports RGB565 |
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I just found LG4573B has same situation |
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【ESP32-S3驱动480*480的RGB屏DEMO，效果不错-哔哩哔哩】 https://b23.tv/t0UkjQY |
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I am also testing a similar board, but not yet make it speedy. You may find my testing status at twitter. |
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As you provided a LVGL benchmark demo, I also tested mine: |
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the video doesn´t work, can you reupload it? |
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@moononournation Thank You! My code: #include <Arduino_GFX_Library.h>
#define GFX_BL 4 // default backlight pin, you may replace DF_GFX_BL to actual backlight pin
Arduino_ESP32RGBPanel *bus = new Arduino_ESP32RGBPanel(
38 /* CS */, 45 /* SCK */, 48 /* SDA */,
40 /* DE */, 41 /* VSYNC */, 42 /* HSYNC */, 39 /* PCLK */,
18 /* R0 */, 8 /* R1 */, 3 /* R2 */, 46 /* R3 */, 9 /* R4 */,
13 /* G0 */, 12 /* G1 */, 11 /* G2 */, 10 /* G3 */, 16 /* G4 */, 17 /* G5 */,
45 /* B0 */, 48 /* B1 */, 47 /* B2 */, 21 /* B3 */, 14 /* B4 */
);
Arduino_ST7701_RGBPanel *gfx = new Arduino_ST7701_RGBPanel(
bus, GFX_NOT_DEFINED, 300 /* width */, 300 /* height */);
void setup(void)
{
gfx->begin();
gfx->fillScreen(BLACK);
#ifdef GFX_BL
pinMode(GFX_BL, OUTPUT);
digitalWrite(GFX_BL, HIGH);
#endif
gfx->setCursor(10, 10);
gfx->setTextColor(RED);
gfx->println("Hello World!");
delay(5000); // 5 seconds
}
void loop()
{
gfx->setCursor(random(gfx->width()), random(gfx->height()));
gfx->setTextColor(random(0xffff), random(0xffff));
gfx->setTextSize(random(6) /* x scale */, random(6) /* y scale */, random(2) /* pixel_margin */);
gfx->println("Hello World!");
delay(1000); // 1 second
}
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@AaronHo32 I had to invertDisplay() as all colours were true for 0xFFFF-my_colour. Don't for get to set the screen res to 480x480 in the Arduino_ST7701_RGBPanel *gfx constructor. |
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Hi everyone, |
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Seems cannot detect PSRAM, I think N8R8 should select PSRAM: "OPI PSRAM". |
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Thank you, this worked! |
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So I'm trying out the PDQ test and I shortened the code down to what I believe is needed for the 2.1" screen. |
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Any message in Serial Monitor? |
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Yes, I see the |
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Dear moononournation, thanks for your great work! #include "Arduino.h"
#include <Arduino_GFX_Library.h>
#define GFX_BL 38
Arduino_DataBus *bus = new Arduino_SWSPI(
GFX_NOT_DEFINED /* DC */, 21 /* CS */,
47 /* SCK */, 41 /* MOSI */, GFX_NOT_DEFINED /* MISO */);
Arduino_ESP32RGBPanel *rgbpanel = new Arduino_ESP32RGBPanel(
39 /* DE */, 48 /* VSYNC */, 40 /* HSYNC */, 45 /* PCLK */,
10 /* R0 */, 16 /* R1 */, 9 /* R2 */, 15 /* R3 */, 46 /* R4 */,
8 /* G0 */, 13 /* G1 */, 18 /* G2 */, 12 /* G3 */, 11 /* G4 */, 17 /* G5 */,
47 /* B0 */, 41 /* B1 */, 0 /* B2 */, 42 /* B3 */, 14 /* B4 */,
1 /* hsync_polarity */, 10 /* hsync_front_porch */, 10 /* hsync_pulse_width */, 10 /* hsync_back_porch */,
1 /* vsync_polarity */, 14 /* vsync_front_porch */, 2 /* vsync_pulse_width */, 12 /* vsync_back_porch */);
Arduino_RGB_Display *gfx = new Arduino_RGB_Display(
480 /* width */, 480 /* height */, rgbpanel, 0 /* rotation */, true /* auto_flush */,
bus, GFX_NOT_DEFINED /* RST */, st7701_type7_init_operations, sizeof(st7701_type7_init_operations));
void setup()
{
delay(2000);
Serial.begin(115200);
Serial.println("Rotary Short Demo");
delay(1000);
Serial.println("gfx beguin");
gfx->begin();
delay(1000);
Serial.println("BACK LED ON?");
pinMode(GFX_BL, OUTPUT);
digitalWrite(GFX_BL, HIGH);
gfx->fillScreen(RED);
delay(1000);
Serial.println("colorinbchius");
delay(1000);
gfx->fillScreen(GREEN);
delay(1000);
gfx->fillScreen(BLUE);
delay(1000);
gfx->fillScreen(BLACK);
delay(1000);
Serial.println("colorinbchius");
gfx->setCursor(10, 10);
gfx->setTextColor(RED);
gfx->println("Setup done!");
Serial.println("Setup done");
}
void loop()
{
gfx->println("Hello World!");
Serial.println("Hello World");
delay(500);
} |
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@moononournation What is the minimum number of connections to get some response from the screen? For example is it possible to connect SPI and a few RGB to atleast get some bad image? |
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The RGB Panel underlying using esp-idf exposed API, and it support 16-bit or 24-bit RGB. |
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Again, regarding the [ZX2D10GE10R-V4848] If I try with your example PDQgraphicstest.ino, the backlight is on, the serial works and displays the figures and messages, but again the display is only a black screen. |
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Ok. Reisntalled everything and it works! |
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Hi @jajito, what did you reinstall to get it working? |
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HI. I work with Visual Studio Code and Platformio, so I deleted the reference to the GFX library in the platformio.ini file and put it back again, so the library was reloaded, and then it worked flawless. |
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HI, I was able to run the code that was presented by jajito, but i have a problem with using certain pins. I am using the ESP32-S3-WROOM-1 (N8R8) with 8MB of PSRAM. When i set GPIO pins 33-36 as OUTPUT, the board keeps reseting with the error: rst:0x8 (TG1WDT_SYS_RST) ,boot:0x8 (SPI_FAST_FLASH_BOOT). I know these pins are not available on the development board (WROOM) but i am trying to use these pins on a non development board also. When i use pins 33-36 for the standard GFX library, I dont have this reset problem. So it doesnt appear to be the WROOM board that is causing this issue. Perhaps I could raise this as an issue with your repository? Would you have any suggestions as to why there are problems with these pins. When I use jajitos example, his pinout works fine. Thanks. |
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Actually reading from the GPIO summary on the Espressif website it says that its not recommended to use 33-37 when using Octal PSRAM. So maybe this is why i am seeing a difference in the behaviour when using those pins. https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-reference/peripherals/gpio.html |
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Good day @moononournation Board
I am getting a compilation error in platformio,
The code is one of the problems, the second problem is that I can't understand whether the display is connected either via |
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This library only support Arduino IDE, no pio support. |
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Thank you for your feedback, but I also compiled the firmware in Arduino IDE
In fact,
Sorry for misunderstanding some things. |
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I have a similar setup. Maybe I can help. From your photograph is appears that you're not wired up for RGB data transfer yet you are calling the RGB constructor. I would expect your wiring to look more like this:
SPI on the ST7701 is for setup only. A parallel data bus must be established in order to transfer the pixel data. Schematic: https://github.com/Xinyuan-LilyGO/LilyGo-T-RGB/blob/main/schematic/T-RGB.pdf ...and then trying the Arduino_GFX example RGB sketch with suitable pin definitions in the constructor. You're gonna run out of pins with your current dev board so I'd recommend getting an 'all-pins-broken-out' esp32-s3 variant without an integrated display but with 8MB PSRAM which you'll likely need to hold the RGB frame buffer. nik |
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You are right, my
Thank you very much for the schematic, I plan to make a printed circuit board so that there are no wires. |
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Yes I eventually made a pcb too. The Lilygo product was a great reference but I didn't need all the power management and IO expander stuff. Good luck with your project. P.S. I must admit that I gave up on RGB with esp32. Too many pins and too much overhead using the esp RGB peripheral. nik |
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When I search ST7701 on online shop, it always show data port is SPI+RGB. That means it requires 3 pins(SPI) + 24 pins(RGB)for driving it. Only ESP32 S2 have enough pins driving it, so I will try it when the ESP32 S2 support on Arduino IDE is ready.