[经验分享] 【2024 DigiKey 创意大赛】+功能

项目概述和主要工作内容，以下是对项目的详细分析：

针对您提出的项目，以下是对软件规划部分的详细阐述，包括LVGL用户交互界面的实现等关键内容：

 

一、硬件连接示意图：

 

 

二、软件架构概述

软件部分将基于ESP32-S3和rp2040双核心进行开发，其中ESP32-S3作为主核心负责LVGL用户交互界面的运行和显示，而rp2040作为副核心则负责温湿度数据的采集、处理以及与主核心的通信。

 

界面设计：

利用LVGL（Light and Versatile Graphics Library）库，设计直观、易用的用户交互界面，界面应包含温湿度数据显示区域、数据刷新按钮。

数据更新与显示：

编写程序，使ESP32-S3主核心能够实时接收来自rp2040副核心的温湿度数据。

利用LVGL库中的图表或标签等控件，将接收到的数据动态显示在界面上。

实现数据刷新功能，用户点击刷新按钮时，界面将更新显示最新的温湿度数据。

 

LVGL用户交互界面实现：

static lv_disp_t *display_init(ESP_PanelLcd *lcd)
{
    ESP_PANEL_CHECK_FALSE_RET(lcd != nullptr, nullptr, "Invalid LCD device");
    ESP_PANEL_CHECK_FALSE_RET(lcd->getHandle() != nullptr, nullptr, "LCD device is not initialized");

    static lv_disp_draw_buf_t disp_buf;
    static lv_disp_drv_t disp_drv;

    // Alloc draw buffers used by LVGL
    void *buf[LVGL_PORT_BUFFER_NUM_MAX] = { nullptr };
    int buffer_size = 0;

    ESP_LOGD(TAG, "Malloc memory for LVGL buffer");
#if !LVGL_PORT_AVOID_TEAR
    // Avoid tearing function is disabled
    buffer_size = LVGL_PORT_BUFFER_SIZE;
    for (int i = 0; (i < LVGL_PORT_BUFFER_NUM) && (i < LVGL_PORT_BUFFER_NUM_MAX); i++) {
        buf[i] = heap_caps_malloc(buffer_size * sizeof(lv_color_t), LVGL_PORT_BUFFER_MALLOC_CAPS);
        assert(buf[i]);
        ESP_LOGD(TAG, "Buffer[%d] address: %p, size: %d", i, buf[i], buffer_size * sizeof(lv_color_t));
    }

 

 

三、温湿度数据采集与处理

传感器初始化与配置：

在rp2040副核心上编写代码，初始化BME280传感器，并配置其采集模式和采样率等参数。

数据采集与传输：

编写数据采集循环，使rp2040能够定期从BME280传感器读取温湿度数据。

实现数据通信协议，将采集到的数据通过UART、SPI等通信接口发送给ESP32-S3主核心。

    Serial.begin(115200);
    while(!Serial);    // time to get serial running
    Serial.println(F("BME280 test"));

    unsigned status;

    status = bme.begin();  
    
    if (!status) {
        Serial.println("Could not find a valid BME280 sensor, check wiring, address, sensor ID!");
        Serial.print("SensorID was: 0x"); Serial.println(bme.sensorID(),16);
        Serial.print("        ID of 0xFF probably means a bad address, a BMP 180 or BMP 085\n");
        Serial.print("   ID of 0x56-0x58 represents a BMP 280,\n");
        Serial.print("        ID of 0x60 represents a BME 280.\n");
        Serial.print("        ID of 0x61 represents a BME 680.\n");
        while (1) delay(10);

if (isnan(temperature) || isnan(humidity)) {  
    // 如果读取失败，则通过串口输出错误信息  
    Serial.println("Failed to read from BME280 sensor!");  
} else {  
    // 如果温度和湿度数据读取成功，则执行以下操作  
      
    // 创建一个静态JSON文档对象，分配200字节的内存空间  
    // 用于存储JSON格式的数据  
    StaticJsonDocument<200> doc;  
      
    // 向JSON文档中添加温度数据  
    doc["temperature"] = temperature;  
      
    // 向JSON文档中添加湿度数据  
    doc["humidity"] = humidity;  
      
    // 假设pressure和altitude变量已经通过某种方式获取（例如从BME280传感器）  
    // 向JSON文档中添加气压数据  
    doc["pressure"] = pressure;  
      
    // 向JSON文档中添加海拔数据（注意：BME280传感器本身不提供海拔数据，  
    // 这里可能是通过其他方式计算或获取的）  
    doc["altitude"] = altitude;  
      
    // 创建一个字符串对象，用于存储序列化后的JSON数据  
    String jsonString;  
      
    // 使用serializeJson函数将JSON文档序列化为字符串  
    // 并存储在jsonString变量中  
    serializeJson(doc, jsonString);  
      
    // 通过串口输出序列化后的JSON字符串（通常用于调试）  
    Serial.println(jsonString);   
      
    // 通过Serial1串口输出序列化后的JSON字符串  
    // 这可能用于将数据发送到其他设备或系统  
    Serial1.println(jsonString);   
}

实际输出 结果：

 

 

显示地理位置代码：

    String cityCode = "66666&";                         // 查看你的 城市代码
    String userKey = "66666666666"; // 要去注册一个高德地图的开发用户

文字代码：

/* 佛 */
20,20,18,0,3,0,  //dsc : unicode = 0x4f5b
0x00,0x00,0x00,0x00,0xcc,0x7f,0x00,0x00,0x00,0xb8,0xb8,0x00,0x00,0xdc,0x87,0x00,0x00,0x00,0x00,0x00,  //....@*...%%..@%.....
0x00,0x00,0x00,0x33,0xff,0x5d,0x00,0x00,0x00,0xb8,0xb8,0x00,0x00,0xe4,0x8c,0x00,0x00,0x00,0x00,0x00,  //...+@*...%%..@%.....
0x00,0x00,0x00,0x8f,0xf2,0x53,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x48,0x00,  //...%@*@@@@@@@@@@@@*.
0x00,0x00,0x0c,0xf0,0x91,0x17,0x54,0x54,0x54,0xcf,0xcf,0x54,0x54,0xed,0xb2,0x54,0x6e,0xff,0x48,0x00,  //..+@%+***@@**@%**@*.
0x00,0x00,0x6e,0xff,0x28,0x00,0x00,0x00,0x00,0xb8,0xb8,0x00,0x00,0xe4,0x8c,0x00,0x28,0xff,0x48,0x00,  //..*@+....%%..@%.+@*.
0x00,0x0c,0xe8,0xff,0x10,0x00,0x00,0x00,0x00,0xb8,0xb8,0x00,0x00,0xe4,0x8c,0x00,0x28,0xff,0x48,0x00,  //.+@@+....%%..@%.+@*.
0x00,0x82,0xff,0xff,0x10,0x21,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x48,0x00,  //.%@@++@@@@@@@@@@@@*.
0x2e,0xfa,0xd5,0xff,0x10,0x44,0xff,0x79,0x54,0xd4,0xcd,0x54,0x54,0xed,0xb2,0x54,0x6e,0xff,0x48,0x00,  //+@@@+*@**@@**@%**@*.
0xa1,0xd5,0x5b,0xff,0x10,0x67,0xff,0x1c,0x00,0xc6,0xab,0x00,0x00,0xe4,0x8c,0x00,0x00,0x00,0x00,0x00,  //%@*@+*@+.@%..@%.....
0x50,0x35,0x54,0xff,0x10,0x8a,0xf9,0x02,0x00,0xd9,0x9a,0x00,0x00,0xe4,0x8c,0x00,0x00,0x00,0x00,0x00,  //*+*@+%@+.@%..@%.....
0x00,0x00,0x54,0xff,0x10,0x9c,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x2a,  //..*@+%@@@@@@@@@@@@@+
0x00,0x00,0x54,0xff,0x10,0x33,0x54,0x54,0x6f,0xff,0x8c,0x54,0x54,0xed,0xb2,0x54,0x54,0x96,0xff,0x20,  //..*@++***@%**@%**%@+
0x00,0x00,0x54,0xff,0x10,0x00,0x00,0x00,0x5e,0xff,0x24,0x00,0x00,0xe4,0x8c,0x00,0x00,0x6e,0xff,0x12,  //..*@+...*@+..@%..*@+
0x00,0x00,0x54,0xff,0x10,0x00,0x00,0x00,0xc5,0xda,0x00,0x00,0x00,0xe4,0x8c,0x0f,0x07,0xae,0xf5,0x02,  //..*@+...@@...@%++%@+
0x00,0x00,0x54,0xff,0x10,0x00,0x00,0x54,0xff,0x67,0x00,0x00,0x00,0xe4,0x8c,0xdf,0xff,0xff,0xa3,0x00,  //..*@+..*@*...@%@@@%.
0x00,0x00,0x54,0xff,0x10,0x00,0x28,0xf1,0xc9,0x05,0x00,0x00,0x00,0xe4,0x8c,0x51,0x73,0x57,0x05,0x00,  //..*@+.+@@+...@%***+.
0x00,0x00,0x54,0xff,0x10,0x30,0xe9,0xe8,0x20,0x00,0x00,0x00,0x00,0xe4,0x8c,0x00,0x00,0x00,0x00,0x00,  //..*@++@@+....@%.....
0x00,0x00,0x54,0xff,0x10,0x37,0xc6,0x23,0x00,0x00,0x00,0x00,0x00,0xe4,0x8c,0x00,0x00,0x00,0x00,0x00,  //..*@++@+.....@%.....


/* 山 */
19,17,18,2,3,0,  //dsc : unicode = 0x5c71
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //.......@@........
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //.......@@........
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //.......@@........
0xff,0xa8,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //@%.....@@.....%@+
0xff,0xa8,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //@%.....@@.....%@+
0xff,0xa8,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //@%.....@@.....%@+
0xff,0xa8,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //@%.....@@.....%@+
0xff,0xa8,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //@%.....@@.....%@+
0xff,0xa8,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //@%.....@@.....%@+
0xff,0xa8,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //@%.....@@.....%@+
0xff,0xa8,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //@%.....@@.....%@+
0xff,0xa8,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //@%.....@@.....%@+
0xff,0xa8,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //@%.....@@.....%@+
0xff,0xa8,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //@%.....@@.....%@+
0xff,0xa8,0x00,0x00,0x00,0x00,0x00,0xdc,0xd8,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //@%.....@@.....%@+
0xff,0xd2,0x7c,0x7c,0x7c,0x7c,0x7c,0xed,0xeb,0x7c,0x7c,0x7c,0x7c,0x7c,0xce,0xff,0x0c,  //@@*****@@*****@@+
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x0c,  //@@@@@@@@@@@@@@@@+
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xa0,0xff,0x0c,  //..............%@+


/* 市 */
20,20,20,0,2,0,  //dsc : unicode = 0x5e02
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x4e,0xd1,0x23,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //........*@+.........
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x3b,0xfe,0xbe,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //........+@%+........
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x9b,0xc8,0x1a,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //.........%@+........
0x68,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x80,  //*@@@@@@@@@@@@@@@@@@%
0x32,0x7c,0x7c,0x7c,0x7c,0x7c,0x7c,0x7c,0x7c,0xe3,0xe3,0x7c,0x7c,0x7c,0x7c,0x7c,0x7c,0x7c,0x7c,0x3e,  //+********@@********+
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //.........@@.........
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //.........@@.........
0x00,0x00,0xc0,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xe0,0x00,0x00,  //..@@@@@@@@@@@@@@@@..
0x00,0x00,0xc0,0xdf,0x74,0x74,0x74,0x74,0x74,0xe1,0xe1,0x74,0x74,0x74,0x74,0x74,0xcf,0xe0,0x00,0x00,  //..@@*****@@*****@@..
0x00,0x00,0xc0,0xc4,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x00,0x00,0x00,0x00,0xa8,0xe0,0x00,0x00,  //..@@.....@@.....%@..
0x00,0x00,0xc0,0xc4,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x00,0x00,0x00,0x00,0xa8,0xe0,0x00,0x00,  //..@@.....@@.....%@..
0x00,0x00,0xc0,0xc4,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x00,0x00,0x00,0x00,0xa8,0xe0,0x00,0x00,  //..@@.....@@.....%@..
0x00,0x00,0xc0,0xc4,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x00,0x00,0x00,0x00,0xa8,0xe0,0x00,0x00,  //..@@.....@@.....%@..
0x00,0x00,0xc0,0xc4,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x00,0x00,0x00,0x00,0xa8,0xe0,0x00,0x00,  //..@@.....@@.....%@..
0x00,0x00,0xc0,0xc4,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x00,0x00,0x00,0x00,0xab,0xdf,0x00,0x00,  //..@@.....@@.....%@..
0x00,0x00,0xc0,0xc4,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x00,0x00,0x00,0x1a,0xe1,0xca,0x00,0x00,  //..@@.....@@....+@@..
0x00,0x00,0xc0,0xc4,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x6c,0xff,0xff,0xff,0xff,0x75,0x00,0x00,  //..@@.....@@.*@@@@*..
0x00,0x00,0xc0,0xc4,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x28,0x8b,0x83,0x7c,0x4c,0x00,0x00,0x00,  //..@@.....@@.+%%**...
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //.........@@.........
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xc8,0xc8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  //.........@@.........

显示结果：

 

 

LVGL

初始化液晶屏和 LVGL 接口的函数，直接调用 esp_lvgl语句实现的，函数就是在 esp32_s3_szp.c 文件中实现的及函数的定义。

 

 

 esp-bsp 库，使用 VSCode 打开 esp-bsp 文件夹， bsp/esp32_s3_eye/esp32_s3_eye.c 文件， bsp_display_lcd_init()函数，下代码所示：

static lv_display_t *bsp_display_lcd_init(const bsp_display_cfg_t *cfg)
{
    assert(cfg != NULL);
    esp_lcd_panel_io_handle_t io_handle = NULL;
    esp_lcd_panel_handle_t panel_handle = NULL;
    const bsp_display_config_t bsp_disp_cfg = {
        .max_transfer_sz = BSP_LCD_DRAW_BUFF_SIZE * sizeof(uint16_t),
    };
    BSP_ERROR_CHECK_RETURN_NULL(bsp_display_new(&bsp_disp_cfg, &panel_handle, &io_handle));

#if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(5, 0, 0)
    esp_lcd_panel_disp_off(panel_handle, false);
#else
    esp_lcd_panel_disp_on_off(panel_handle, true);
#endif

    /* Add LCD screen */
    ESP_LOGD(TAG, "Add LCD screen");
    const lvgl_port_display_cfg_t disp_cfg = {
        .io_handle = io_handle,
        .panel_handle = panel_handle,
        .buffer_size = cfg->buffer_size,
        .double_buffer = cfg->double_buffer,
        .hres = BSP_LCD_H_RES,
        .vres = BSP_LCD_V_RES,
        .monochrome = false,
        /* Rotation values must be same as used in esp_lcd for initial settings of the screen */
        .rotation = {
            .swap_xy = false,
            .mirror_x = false,
            .mirror_y = false,
        },
        .flags = {
            .buff_dma = cfg->flags.buff_dma,
            .buff_spiram = cfg->flags.buff_spiram,
#if LVGL_VERSION_MAJOR >= 9
            .swap_bytes = (BSP_LCD_BIGENDIAN ? true : false),
#endif
        }
    };

    return lvgl_port_add_disp(&disp_cfg);
}

四、实际效果：

 

 

 

总结：

一个基于ESP32-S3和rp2040双核心的智能温湿度显示系统。硬件部分通过连接BME280传感器实现数据采集，软件部分则利用LVGL库设计用户交互界面，并实时显示温湿度数据。ESP32-S3作为主核心负责界面运行与数据显示，而rp2040则负责数据采集与传输。项目关键工作包括界面设计、数据更新与显示、LVGL用户交互界面实现以及温湿度数据采集与处理。通过此系统，用户可直观获取当前环境的温湿度信息。

 

 

 

本帖最后由 meiyao 于 2024-11-5 23:20 编辑

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