Rdzleo c24a9bc162 feat: 集成 dzbj LVGL 显示模块 + 配网模式内存优化

阶段1: 将 dzbj 项目的 LVGL 8.3.11 LCD 显示集成到 AI小智 主项目，
开机显示 ScreenHome 界面，同时优化配网模式下的内存使用，
确保 WiFi+BLE+LVGL 三者共存运行。

## 新增功能

### dzbj 显示模块集成
- 新增 main/dzbj/ 目录，移植 LCD 驱动(ST77916 QSPI)、触摸驱动(CST816S)、
  LVGL 初始化和 SquareLine Studio UI 界面
- I2C 总线共享：dzbj 触摸控制器复用主项目的 I2C_NUM_1 总线
- GPIO 冲突解决：LED(GPIO21)、Touch1(GPIO1)、Touch4(GPIO7) 改为 NC，
  电池 ADC 从 GPIO6 改为 GPIO3
- 添加 LVGL、esp_lcd_st77916、esp_lcd_touch_cst816s 等组件依赖
- managed_components 纳入版本管理

### 配网模式轻量化启动
- BoxAudioCodec: 新增 output_only 模式，仅创建 I2S TX 通道（省 ~13KB DMA）
  跳过 ES7210 ADC 初始化（省 ~2-4KB）
- AudioCodec: 新增 StartOutputOnly() 方法，仅启用扬声器输出
- Application: 配网模式跳过 Opus 编码器、输入重采样器、协议初始化、
  天气位置检测等网络业务
- 板级构造函数: 配网模式跳过电池检测、IMU传感器、PowerSaveTimer

### WifiBoard 配网流程修复
- NeedsProvisioning() 静态方法: 读取 NVS force_ap 和 SSID 列表，
  用于提前判断配网模式
- force_ap 竞态修复: 构造函数不再清零 force_ap，改在 StartNetwork() 清零，
  确保 NeedsProvisioning() 能正确读到 force_ap=1
- Application 缓存 provisioning_mode_ 成员变量，避免重复读 NVS

### BLE 配网重启修复
- 配网成功后用 esp_timer 延迟重启替代 xTaskCreate，
  避免内存紧张时任务创建失败导致设备不重启
- 注释掉 WiFi 连接成功后的 MAC 地址发送步骤

### sdkconfig 内存优化
- BT_ALLOCATION_FROM_SPIRAM_FIRST=y (BLE 动态分配优先 PSRAM)
- SPIRAM_MALLOC_RESERVE_INTERNAL=32768
- NVS_ALLOCATE_CACHE_IN_SPIRAM=y
- WiFi 静态缓冲区数量优化 (RX=10, TX=8)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

2026-02-27 17:07:51 +08:00

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JPG decoder

Allow the use of JPG images in LVGL. Besides that it also allows the use of a custom format, called Split JPG (SJPG), which can be decoded in more optimal way on embedded systems.

Overview

Supports both normal JPG and the custom SJPG formats.
Decoding normal JPG consumes RAM with the size fo the whole uncompressed image (recommended only for devices with more RAM)
SJPG is a custom format based on "normal" JPG and specially made for LVGL.
SJPG is 'split-jpeg' which is a bundle of small jpeg fragments with an sjpg header.
SJPG size will be almost comparable to the jpg file or might be a slightly larger.
File read from file and c-array are implemented.
SJPEG frame fragment cache enables fast fetching of lines if available in cache.
By default the sjpg image cache will be image width * 2 * 16 bytes (can be modified)
Currently only 16 bit image format is supported (TODO)
Only the required partion of the JPG and SJPG images are decoded, therefore they can't be zoomed or rotated.

Usage

If enabled in lv_conf.h by LV_USE_SJPG LVGL will register a new image decoder automatically so JPG and SJPG files can be directly used as image sources. For example:

lv_img_set_src(my_img, "S:path/to/picture.jpg");

Note that, a file system driver needs to registered to open images from files. Read more about it here or just enable one in lv_conf.h with LV_USE_FS_...

Converter

Converting JPG to C array

Use lvgl online tool https://lvgl.io/tools/imageconverter
Color format = RAW, output format = C Array

Converting JPG to SJPG

python3 and the PIL library required. (PIL can be installed with pip3 install pillow)

To create SJPG from JPG:

Copy the image to convert into lvgl/scripts
cd lvgl/scripts
python3 jpg_to_sjpg.py image_to_convert.jpg. It creates both a C files and an SJPG image.

The expected result is:

Conversion started...

Input:
        image_to_convert.jpg
        RES = 640 x 480

Output:
        Time taken = 1.66 sec
        bin size = 77.1 KB
        walpaper.sjpg           (bin file)
        walpaper.c              (c array)

All good!

Example


.. include:: ../../examples/libs/sjpg/index.rst

API


.. doxygenfile:: lv_sjpg.h
  :project: lvgl

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