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David R.
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# LVGL Demo v8
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[英文版本](./README.md)
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该示例演示了如何移植 LVGL v8 并使用 LVGL 内置的示例进行性能测试。该示例使用了开发板的 MIPI-DSI 接口。基于此示例，可以开发基于 LVGL v8 的应用。
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## 快速入门
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### 准备工作
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* 一块 ESP32-P4-Function-EV-Board 开发板。
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* 一块由 [EK79007](https://dl.espressif.com/dl/schematics/display_driver_chip_EK79007AD_datasheet.pdf) 芯片驱动的 7 英寸 1024 x 600 LCD 屏幕，配有 32 针 FPC 连接 [适配板](https://dl.espressif.com/dl/schematics/esp32-p4-function-ev-board-lcd-subboard-schematics.pdf) ([LCD 规格](https://dl.espressif.com/dl/schematics/display_datasheet.pdf))。
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* 用于供电和编程的 USB-C 电缆。
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* 请参考以下步骤进行连接：
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* **步骤 1**. 根据下表，将屏幕适配板背面的引脚连接到开发板的相应引脚。
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| 屏幕适配板 | ESP32-P4-Function-EV-Board |
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| -------------------- | -------------------------- |
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| 5V（任意一个） | 5V（任意一个） |
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| GND（任意一个） | GND（任意一个） |
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| PWM | GPIO26 |
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| LCD_RST | GPIO27 |
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* **步骤 2**. 通过 `MIPI_DSI` 接口连接 LCD 的 FPC。
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* **步骤 3**. 使用 USB-C 电缆将 `USB-UART` 端口连接到 PC（用于供电和查看串行输出）。
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* **步骤 4**. 打开开发板的电源开关。
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### ESP-IDF 要求
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- 此示例支持 ESP-IDF release/v5.3 及以上版本。默认情况下，在 ESP-IDF release/v5.3 上运行。
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- 请参照 [ESP-IDF 编程指南](https://docs.espressif.com/projects/esp-idf/zh_CN/latest/esp32/get-started/index.html) 设置开发环境。**强烈推荐** 通过 [编译第一个工程](https://docs.espressif.com/projects/esp-idf/zh_CN/latest/esp32/get-started/index.html#id8) 来熟悉 ESP-IDF，并确保环境设置正确。
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### 获取 esp-dev-kits 仓库
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在编译 esp-dev-kits 仓库中的示例之前，请先在终端中运行以下命令，将该仓库克隆到本地：
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```
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git clone --recursive https://github.com/espressif/esp-dev-kits.git
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```
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### 配置
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运行 ``idf.py menuconfig`` 并修改 ``Board Support Package(ESP32-P4)`` 配置：
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```
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menuconfig > Component config > Board Support Package
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```
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## 如何使用示例
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### 编译和烧录示例
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编译项目并将其烧录到开发板上，运行监视工具可查看串行端口输出（将 `PORT` 替换为所用开发板的串行端口名）：
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```c
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idf.py -p PORT flash monitor
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```
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输入``Ctrl-]`` 可退出串口监视。
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有关配置和使用 ESP-IDF 来编译项目的完整步骤，请参阅 [ESP-IDF 快速入门指南](https://docs.espressif.com/projects/esp-idf/zh_CN/latest/esp32/get-started/index.html) 。
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### 示例输出
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- 完整日志如下所示：
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```c
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I (25) boot: ESP-IDF v5.4-dev-2167-gdef35b1ca7-dirty 2nd stage bootloader
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I (26) boot: compile time Sep 27 2024 16:56:08
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I (27) boot: Multicore bootloader
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I (32) boot: chip revision: v0.1
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I (35) qio_mode: Enabling default flash chip QIO
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I (40) boot.esp32p4: SPI Speed : 80MHz
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I (45) boot.esp32p4: SPI Mode : QIO
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I (49) boot.esp32p4: SPI Flash Size : 16MB
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I (54) boot: Enabling RNG early entropy source...
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I (60) boot: Partition Table:
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I (63) boot: ## Label Usage Type ST Offset Length
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I (70) boot: 0 nvs WiFi data 01 02 00009000 00006000
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I (78) boot: 1 phy_init RF data 01 01 0000f000 00001000
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I (85) boot: 2 factory factory app 00 00 00010000 00800000
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I (93) boot: 3 storage Unknown data 01 82 00810000 00700000
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I (101) boot: End of partition table
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I (105) esp_image: segment 0: paddr=00010020 vaddr=48060020 size=7573ch (481084) map
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I (189) esp_image: segment 1: paddr=00085764 vaddr=30100000 size=00020h ( 32) load
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I (191) esp_image: segment 2: paddr=0008578c vaddr=30100020 size=0003ch ( 60) load
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I (196) esp_image: segment 3: paddr=000857d0 vaddr=4ff00000 size=0a848h ( 43080) load
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I (212) esp_image: segment 4: paddr=00090020 vaddr=48000020 size=58208h (360968) map
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I (270) esp_image: segment 5: paddr=000e8230 vaddr=4ff0a848 size=0e2b8h ( 58040) load
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I (283) esp_image: segment 6: paddr=000f64f0 vaddr=4ff18b00 size=031b4h ( 12724) load
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I (291) boot: Loaded app from partition at offset 0x10000
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I (292) boot: Disabling RNG early entropy source...
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I (303) hex_psram: vendor id : 0x0d (AP)
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I (304) hex_psram: Latency : 0x01 (Fixed)
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I (304) hex_psram: DriveStr. : 0x00 (25 Ohm)
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I (307) hex_psram: dev id : 0x03 (generation 4)
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I (313) hex_psram: density : 0x07 (256 Mbit)
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I (318) hex_psram: good-die : 0x06 (Pass)
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I (323) hex_psram: SRF : 0x02 (Slow Refresh)
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I (329) hex_psram: BurstType : 0x00 ( Wrap)
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I (334) hex_psram: BurstLen : 0x03 (2048 Byte)
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I (340) hex_psram: BitMode : 0x01 (X16 Mode)
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I (345) hex_psram: Readlatency : 0x04 (14 cycles@Fixed)
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I (351) hex_psram: DriveStrength: 0x00 (1/1)
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I (356) MSPI DQS: tuning success, best phase id is 2
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I (544) MSPI DQS: tuning success, best delayline id is 11
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I esp_psram: Found 32MB PSRAM device
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I esp_psram: Speed: 200MHz
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I (545) mmu_psram: flash_drom_paddr_start: 0x10000
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I (575) mmu_psram: flash_irom_paddr_start: 0x90000
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I (594) hex_psram: psram CS IO is dedicated
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I (594) cpu_start: Multicore app
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I (1050) esp_psram: SPI SRAM memory test OK
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W (1060) clk: esp_perip_clk_init() has not been implemented yet
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I (1067) cpu_start: Pro cpu start user code
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I (1067) cpu_start: cpu freq: 360000000 Hz
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I (1067) app_init: Application information:
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I (1070) app_init: Project name: lvgl_demo_v8
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I (1076) app_init: App version: 7e53cd00-dirty
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I (1081) app_init: Compile time: Sep 27 2024 16:55:57
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I (1087) app_init: ELF file SHA256: f111a533d...
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I (1093) app_init: ESP-IDF: v5.4-dev-2167-gdef35b1ca7-dirty
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I (1100) efuse_init: Min chip rev: v0.1
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I (1104) efuse_init: Max chip rev: v0.99
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I (1109) efuse_init: Chip rev: v0.1
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I (1114) heap_init: Initializing. RAM available for dynamic allocation:
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I (1122) heap_init: At 4FF1DCE0 len 0001D2E0 (116 KiB): RAM
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I (1128) heap_init: At 4FF3AFC0 len 00004BF0 (18 KiB): RAM
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I (1134) heap_init: At 4FF40000 len 00040000 (256 KiB): RAM
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I (1140) heap_init: At 50108080 len 00007F80 (31 KiB): RTCRAM
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I (1147) heap_init: At 3010005C len 00001FA4 (7 KiB): TCM
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I (1153) esp_psram: Adding pool of 31360K of PSRAM memory to heap allocator
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I (1161) spi_flash: detected chip: generic
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I (1165) spi_flash: flash io: qio
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W (1169) i2c: This driver is an old driver, please migrate your application code to adapt `driver/i2c_master.h`
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I (1180) main_task: Started on CPU0
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I (1203) esp_psram: Reserving pool of 32K of internal memory for DMA/internal allocations
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I (1203) main_task: Calling app_main()
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I (1205) LVGL: Starting LVGL task
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W (1209) ledc: GPIO 26 is not usable, maybe conflict with others
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I (1216) ESP32_P4_EV: MIPI DSI PHY Powered on
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I (1222) ESP32_P4_EV: Install MIPI DSI LCD control panel
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I (1227) ESP32_P4_EV: Install EK79007 LCD control panel
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I (1233) ek79007: version: 0.1.0
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I (1237) gpio: GPIO[27]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
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I (1403) ESP32_P4_EV: Display initialized
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E (1404) lcd_panel: esp_lcd_panel_swap_xy(50): swap_xy is not supported by this panel
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W (1405) GT911: Unable to initialize the I2C address
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I (1411) GT911: TouchPad_ID:0x39,0x31,0x31
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I (1415) GT911: TouchPad_Config_Version:89
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I (1420) ESP32_P4_EV: Setting LCD backlight: 100%
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I (1489) main_task: Returned from app_main()
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...
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```
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## 技术支持与反馈
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请通过以下渠道进行反馈：
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- 有关技术问题，请访问 [esp32.com](https://esp32.com/viewforum.php?f=22) 论坛。
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- 有关功能请求或错误报告，请创建新的 [GitHub 问题](https://github.com/espressif/esp-dev-kits/issues)。
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我们会尽快回复。
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