espressif/esp_lcd_gc9b71
uploaded 3 weeks ago
ESP LCD GC9B71
readme
# ESP LCD GC9B71
[](https://components.espressif.com/components/espressif/esp_lcd_gc9b71)
Implementation of the GC9B71 LCD controller with [esp_lcd](https://docs.espressif.com/projects/esp-idf/en/latest/esp32s3/api-reference/peripherals/lcd.html) component.
| LCD controller | Communication interface | Component name | Link to datasheet |
| :------------: | :---------------------: | :------------: | :---------------------------------------------------------------------------: |
| GC9B71 | SPI/QSPI | esp_lcd_gc9b71 | [PDF](https://dl.espressif.com/AE/esp-iot-solution/GC9B71_DataSheet_V1.0.pdf) |
## Add to project
Packages from this repository are uploaded to [Espressif's component service](https://components.espressif.com/).
You can add them to your project via `idf.py add-dependancy`, e.g.
```
idf.py add-dependency "espressif/esp_lcd_gc9b71"
```
Alternatively, you can create `idf_component.yml`. More is in [Espressif's documentation](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-guides/tools/idf-component-manager.html).
## Initialization Code
### SPI Interface
```c
ESP_LOGI(TAG, "Initialize SPI bus");
const spi_bus_config_t bus_config = GC9B71_PANEL_BUS_SPI_CONFIG(EXAMPLE_PIN_NUM_LCD_PCLK,
EXAMPLE_PIN_NUM_LCD_DATA0,
EXAMPLE_LCD_H_RES * 80 * sizeof(uint16_t));
ESP_ERROR_CHECK(spi_bus_initialize(EXAMPLE_LCD_HOST, &bus_config, SPI_DMA_CH_AUTO));
ESP_LOGI(TAG, "Install panel IO");
esp_lcd_panel_io_handle_t io_handle = NULL;
const esp_lcd_panel_io_spi_config_t io_config = GC9B71_PANEL_IO_SPI_CONFIG(EXAMPLE_PIN_NUM_LCD_CS, EXAMPLE_PIN_NUM_LCD_DC,
callback, &callback_data);
ESP_ERROR_CHECK(esp_lcd_new_panel_io_spi((esp_lcd_spi_bus_handle_t)EXAMPLE_LCD_HOST, &io_config, &io_handle));
/**
* Uncomment these line if use custom initialization commands.
* The array should be declared as static const and positioned outside the function.
*/
// static const gc9b71_lcd_init_cmd_t lcd_init_cmds[] = {
// // {cmd, { data }, data_size, delay_ms}
// {0xfe, (uint8_t []){0x00}, 0, 0},
// {0xef, (uint8_t []){0x00}, 0, 0},
// {0x80, (uint8_t []){0x11}, 1, 0},
// {0x81, (uint8_t []){0x70}, 1, 0},
// ...
// };
ESP_LOGI(TAG, "Install GC9B71 panel driver");
esp_lcd_panel_handle_t panel_handle = NULL;
const gc9b71_vendor_config_t vendor_config = {
// .init_cmds = lcd_init_cmds, // Uncomment these line if use custom initialization commands
// .init_cmds_size = sizeof(lcd_init_cmds) / sizeof(gc9b71_lcd_init_cmd_t),
.flags = {
.use_qspi_interface = 0,
},
};
const esp_lcd_panel_dev_config_t panel_config = {
.reset_gpio_num = EXAMPLE_PIN_NUM_LCD_RST,
.rgb_ele_order = LCD_RGB_ELEMENT_ORDER_RGB, // Implemented by LCD command `36h`
.bits_per_pixel = 16, // Implemented by LCD command `3Ah` (16/18/24)
.vendor_config = (void *)&vendor_config,
};
ESP_ERROR_CHECK(esp_lcd_new_panel_gc9b71(io_handle, &panel_config, &panel_handle));
esp_lcd_panel_reset(panel_handle);
esp_lcd_panel_init(panel_handle);
esp_lcd_panel_disp_on_off(panel_handle, true);
```
### QSPI Interface
```c
ESP_LOGI(TAG, "Initialize QSPI bus");
const esp_lcd_panel_io_spi_config_t io_config = GC9B71_PANEL_BUS_QSPI_CONFIG(EXAMPLE_PIN_NUM_LCD_PCLK,
EXAMPLE_PIN_NUM_LCD_DATA0,
EXAMPLE_PIN_NUM_LCD_DATA1,
EXAMPLE_PIN_NUM_LCD_DATA2,
EXAMPLE_PIN_NUM_LCD_DATA3,
EXAMPLE_LCD_H_RES * 80 * sizeof(uint16_t));
ESP_ERROR_CHECK(spi_bus_initialize(EXAMPLE_LCD_HOST, &buscfg, SPI_DMA_CH_AUTO));
ESP_LOGI(TAG, "Install panel IO");
esp_lcd_panel_io_handle_t io_handle = NULL;
const esp_lcd_panel_io_spi_config_t io_config = GC9B71_PANEL_IO_QSPI_CONFIG(EXAMPLE_PIN_NUM_LCD_CS, callback, &callback_data);
ESP_ERROR_CHECK(esp_lcd_new_panel_io_spi((esp_lcd_spi_bus_handle_t)EXAMPLE_LCD_HOST, &io_config, &io_handle));
/**
* Uncomment these line if use custom initialization commands.
* The array should be declared as static const and positioned outside the function.
*/
// static const gc9b71_lcd_init_cmd_t lcd_init_cmds[] = {
// // {cmd, { data }, data_size, delay_ms}
// {0xfe, (uint8_t []){0x00}, 0, 0},
// {0xef, (uint8_t []){0x00}, 0, 0},
// {0x80, (uint8_t []){0x11}, 1, 0},
// {0x81, (uint8_t []){0x70}, 1, 0},
// ...
// };
ESP_LOGI(TAG, "Install GC9B71 panel driver");
esp_lcd_panel_handle_t panel_handle = NULL;
const gc9b71_vendor_config_t vendor_config = {
// .init_cmds = lcd_init_cmds, // Only useful when `use_external_init_cmds` is set to 1
// .init_cmds_size = sizeof(lcd_init_cmds) / sizeof(gc9b71_lcd_init_cmd_t),
.flags = {
.use_qspi_interface = 1,
},
};
const esp_lcd_panel_dev_config_t panel_config = {
.reset_gpio_num = EXAMPLE_PIN_NUM_LCD_RST,
.rgb_ele_order = LCD_RGB_ELEMENT_ORDER_RGB, // Implemented by LCD command `36h`
.bits_per_pixel = 16, // Implemented by LCD command `3Ah` (16/18/24)
.vendor_config = (void *)&vendor_config,
};
ESP_ERROR_CHECK(esp_lcd_new_panel_gc9b71(io_handle, &panel_config, &panel_handle));
esp_lcd_panel_reset(panel_handle);
esp_lcd_panel_init(panel_handle);
esp_lcd_panel_disp_on_off(panel_handle, true);
```
## Notes
* When utilizing `esp_panel_lcd_draw_bitmap()` to refresh the screen, ensure that `x_start`, `y_start`, `x_end` and `y_end` are divisible by `2`. This is a requirement of GC9B71. For LVGL, register the following function into `rounder_cb` of `lv_disp_drv_t` to round the coordinates.
```c
void lvgl_port_rounder_callback(struct _lv_disp_drv_t * disp_drv, lv_area_t * area)
{
uint16_t x1 = area->x1;
uint16_t x2 = area->x2;
uint16_t y1 = area->y1;
uint16_t y2 = area->y2;
// round the start of area down to the nearest even number
area->x1 = (x1 >> 1) << 1;
area->y1 = (y1 >> 1) << 1;
// round the end of area up to the nearest odd number
area->x2 = ((x2 >> 1) << 1) + 1;
area->y2 = ((y2 >> 1) << 1) + 1;
}
```
changelog
# ChangeLog
## v0.0.1 - 2023-08-22
### Enhancements:
* Implement the driver for the GC9B71 LCD controller
* Support SPI and QSPI interface
## v0.0.2 - 2023-10-07
### Enhancements:
* Support to use ESP-IDF release/v5.0
## v1.0.0 - 2023-11-03
### bugfix
* Fix the incompatible dependent version of ESP-IDF
* Remove LCD command `29h` from the initialization sequence
* Add parameter `max_trans_sz` in default bus configuration macro
* Add check for conflicting commands between initialization sequence and driver
readme of qspi_with_ram example
| Supported Targets | ESP32 | ESP32-C2 | ESP32-C3 | ESP32-C6 | ESP32-H2 | ESP32-S2 | ESP32-S3 |
| ----------------- | ----- | -------- | -------- | -------- | -------- | -------- | -------- |
| Supported LCD Controllers | SPD2010 | GC9B71 | SH8601 |
| ------------------------- | ------- | ------ | ------ |
# QSPI LCD (with RAM) and Touch Panel Example
[esp_lcd](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/lcd.html) provides several panel drivers out-of box, e.g. ST7789, SSD1306, NT35510. However, there're a lot of other panels on the market, it's beyond `esp_lcd` component's responsibility to include them all.
`esp_lcd` allows user to add their own panel drivers in the project scope (i.e. panel driver can live outside of esp-idf), so that the upper layer code like LVGL porting code can be reused without any modifications, as long as user-implemented panel driver follows the interface defined in the `esp_lcd` component.
This example shows how to use SPD1020, GC9B71 or SH8601 display driver from Component manager in esp-idf project. These components are using API provided by `esp_lcd` component. This example will draw a fancy dash board with the LVGL library.
This example uses the [esp_timer](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/esp_timer.html) to generate the ticks needed by LVGL and uses a dedicated task to run the `lv_timer_handler()`. Since the LVGL APIs are not thread-safe, this example uses a mutex which be invoked before the call of `lv_timer_handler()` and released after it. The same mutex needs to be used in other tasks and threads around every LVGL (lv_...) related function call and code. For more porting guides, please refer to [LVGL porting doc](https://docs.lvgl.io/master/porting/index.html).
## Touch controller
In this example you can enable touch controller SPD2010 or CST816 connected via I2C.
## How to use the example
### Hardware Required
* An ESP development board
* A SPD1020, GC9B71 or SH8601 LCD panel, with QSPI interface (with/without touch)
* An USB cable for power supply and programming
### Hardware Connection
The connection between ESP Board and the LCD is as follows:
```
ESP Board SPD1020, GC9B71 or SH8601 Panel (QSPI)
┌──────────────────────┐ ┌────────────────────┐
│ GND ├─────────────►│ GND │
│ │ │ │
│ 3V3 ├─────────────►│ VCC │
│ │ │ │
│ CS ├─────────────►│ CS │
│ │ │ │
│ SCK ├─────────────►│ CLK │
│ │ │ │
│ D3 ├─────────────►│ IO3 │
│ │ │ │
│ D2 ├─────────────►│ IO2 │
│ │ │ │
│ D1 ├─────────────►│ IO1 │
│ │ │ │
│ D0 ├─────────────►│ IO0 │
│ │ │ │
│ RST ├─────────────►│ RSTN │
│ │ │ │
│ (SCL) ├─────────────►│ TP_SCL │
│ │ │ │
│ (SDA) ├─────────────►│ TP_SDA │
│ │ │ │
│ (TP_INT) ├─────────────►│ TP_INT │
│ │ │ │
│ (3V3) ├─────────────►│ TP_RST │
│ │ │ │
└──────────────────────┘ └────────────────────┘
```
The GPIO number used by this example can be changed in [example_qspi_with_ram.c](main/example_qspi_with_ram.c).
Especially, please pay attention to the level used to turn on the LCD backlight, some LCD module needs a low level to turn it on, while others take a high level. You can change the backlight level macro `EXAMPLE_LCD_BK_LIGHT_ON_LEVEL` in [example_qspi_with_ram.c](main/example_qspi_with_ram.c).
The LCD vendor specific initialization can be different between manufacturers and should consult the LCD supplier for initialization sequence code.
### Build and Flash
Run `idf.py -p PORT build flash monitor` to build, flash and monitor the project. A fancy animation will show up on the LCD as expected.
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.
(To exit the serial monitor, type ``Ctrl-]``.)
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.
### Example Output
```bash
...
I (415) example: Turn off LCD backlight
I (420) gpio: GPIO[0]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
I (429) example: Initialize SPI bus
I (434) example: Install panel IO
I (438) example: Install SPD2010 panel driver
I (442) gpio: GPIO[17]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
I (452) spd2010: LCD panel create success, version: 0.0.1
I (741) example: Turn on LCD backlight
I (741) example: Initialize LVGL library
I (741) example: Register display driver to LVGL
I (746) example: Install LVGL tick timer
I (748) example: Starting LVGL task
I (795) example: Display LVGL demos
I (1038) main_task: Returned from app_main()
...
```
## Troubleshooting
For any technical queries, please open an [issue] (https://github.com/espressif/esp-iot-solution/issues) on GitHub. We will get back to you soon.
Links
Supports all targets
License: Apache-2.0
To add this component to your project, run:
or
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idf.py add-dependency "espressif/esp_lcd_gc9b71^1.0.0"
Examples:
qspi_with_ram
more detailsTo create a project from this example, run:
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idf.py create-project-from-example "espressif/esp_lcd_gc9b71^1.0.0:qspi_with_ram"
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