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78 lines
3.5 KiB
Markdown
78 lines
3.5 KiB
Markdown
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| Supported Targets | ESP32-P4 |
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# MIPI DSI LCD Panel Example
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[esp_lcd](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/lcd.html) supports MIPI DSI interfaced LCD panel, with frame buffer(s) managed by the driver itself.
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This example shows the general process of installing a MIPI DSI LCD driver, and displays a LVGL widget on the screen.
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## How to use the example
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### Hardware Required
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* An ESP development board, which with MIPI DSI peripheral supported
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* A general MIPI DSI LCD panel, with 2 data lanes and 1 clock lane, this example will use the [ILI9881C](https://components.espressif.com/components/espressif/esp_lcd_ili9881c) for demonstration
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* An USB cable for power supply and programming
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### Hardware Connection
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The connection between ESP Board and the LCD is as follows:
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```text
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ESP Board MIPI DSI LCD Panel
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+-----------------------+ +-------------------+
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| GND +--------------+ GND |
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| 3V3 +--------------+ VCC |
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| DSI_CLK_P +--------------+ DSI_CLK_P |
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| DSI_CLK_N + + DSI_CLK_N |
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| DSI_DAT0_P +--------------+ DSI_DAT0_P |
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| DAI_DAT0_N + + DAI_DAT0_N |
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| DSI_DAT1_P +--------------+ DSI_DAT1_P |
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| DSI_DAT1_N + + DSI_DAT1_N |
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| BK_LIGHT +--------------+ BLK |
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| Reset +--------------+ Reset |
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+-----------------------+ +-------------------+
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```
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Before testing your LCD, you also need to read your LCD spec carefully, and then adjust the values like "resolution" and "blank time" in the [main](./main/mipi_dsi_lcd_example_main.c) file.
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### Build and Flash
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Run `idf.py -p PORT build flash monitor` to build, flash and monitor the project. A LVGL widget should show up on the LCD as expected.
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The first time you run `idf.py` for the example will cost extra time as the build system needs to address the component dependencies and downloads the missing components from registry into `managed_components` folder.
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(To exit the serial monitor, type ``Ctrl-]``.)
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See the [Getting Started Guide](https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html) for full steps to configure and use ESP-IDF to build projects.
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### Example Output
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```bash
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...
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I (1629) example: MIPI DSI PHY Powered on
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I (1629) example: Install MIPI DSI LCD control panel
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I (1639) ili9881c: ID1: 0x98, ID2: 0x81, ID3: 0x5c
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I (1779) example: Install MIPI DSI LCD data panel
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I (1799) example: Initialize LVGL library
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I (1799) example: Allocate separate LVGL draw buffers from PSRAM
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I (1809) example: Use esp_timer as LVGL tick timer
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I (1809) example: Create LVGL task
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I (1809) example: Starting LVGL task
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I (1919) example: Display LVGL Meter Widget
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...
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```
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## Troubleshooting
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For any technical queries, please open an [issue](https://github.com/espressif/esp-idf/issues) on GitHub. We will get back to you soon.
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