一、数字图片准备

先准备几张数字图片

通过lvgl官方提供的在线图片转换代码工具转换:Image Converter — LVGL

得到类似如下的C语言文件：

0x00, 0x00, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0x00, 0x00, 
  0x00, 0x00, 0xff, 0x07, 0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x07, 0xff, 0x07, 0x00, 0x00, 
  0x00, 0x00, 0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x07, 0x00, 0x00, 
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
};

const lv_image_dsc_t digit_blue_0 = {
  .header.cf = LV_COLOR_FORMAT_RGB565,
  .header.magic = LV_IMAGE_HEADER_MAGIC,
  .header.w = 80,
  .header.h = 132,
  .data_size = 10560 * 2,
  .data = digit_blue_0_map,
};

对所有图片文件定义，并建立数组

LV_IMG_DECLARE(digit_blue_0)
LV_IMG_DECLARE(digit_blue_1)
LV_IMG_DECLARE(digit_blue_2)
LV_IMG_DECLARE(digit_blue_3)
LV_IMG_DECLARE(digit_blue_4)
LV_IMG_DECLARE(digit_blue_5)
LV_IMG_DECLARE(digit_blue_6)
LV_IMG_DECLARE(digit_blue_7)
LV_IMG_DECLARE(digit_blue_8)
LV_IMG_DECLARE(digit_blue_9)
LV_IMG_DECLARE(digit_blue_dot)
constlv_img_dsc_t *digit_blue_frame_group[] = {

     &digit_blue_0,
     &digit_blue_1,
     &digit_blue_2,
     &digit_blue_3,
     &digit_blue_4,
     &digit_blue_5,
     &digit_blue_6,
     &digit_blue_7,
     &digit_blue_8,
     &digit_blue_9,
     &digit_blue_dot,
};

建立用于显示的数字对象

lv_obj_t* digits1;
lv_obj_t* digits2;
lv_obj_t* digits3;
lv_obj_t* digits4;
lv_obj_t* digits5;
lv_obj_t* digits6;
//指向6个图片对象的指针
lv_obj_t* adc_digit[6];

数字对象初始化，建立每个对象，设置属性，并用adc_digit指向各对象

void digit_blue_disp(void)
{
    digits1=lv_img_create(lv_scr_act());
    adc_digit[0]=digits1;
    lv_img_set_src(digits1, &digit_blue_6);
    lv_obj_set_width(digits1, LV_SIZE_CONTENT);
    lv_obj_set_height(digits1, LV_SIZE_CONTENT);
    lv_obj_set_x(digits1, 0);
    lv_obj_set_y(digits1, 0);
    lv_obj_add_flag(digits1, LV_OBJ_FLAG_ADV_HITTEST );
    lv_obj_clear_flag(digits1, LV_OBJ_FLAG_SCROLLABLE );

    digits2=lv_img_create(lv_scr_act());
    adc_digit[1]=digits2;
    lv_img_set_src(digits2, &digit_blue_7);
    lv_obj_set_width(digits2, LV_SIZE_CONTENT);
    lv_obj_set_height(digits2, LV_SIZE_CONTENT);
    lv_obj_set_x(digits2, 80);
    lv_obj_set_y(digits2, 0);
    lv_obj_add_flag(digits2, LV_OBJ_FLAG_ADV_HITTEST );
    lv_obj_clear_flag(digits2, LV_OBJ_FLAG_SCROLLABLE );

    digits3=lv_img_create(lv_scr_act());
    adc_digit[2]=digits3;
    lv_img_set_src(digits3, &digit_blue_8);
    lv_obj_set_width(digits3, LV_SIZE_CONTENT);
    lv_obj_set_height(digits3, LV_SIZE_CONTENT);
    lv_obj_set_x(digits3, 160);
    lv_obj_set_y(digits3, 0);
    lv_obj_add_flag(digits3, LV_OBJ_FLAG_ADV_HITTEST );
    lv_obj_clear_flag(digits3, LV_OBJ_FLAG_SCROLLABLE );

    digits4=lv_img_create(lv_scr_act());
    adc_digit[3]=digits4;
    lv_img_set_src(digits4, &digit_blue_9);
    lv_obj_set_width(digits4, LV_SIZE_CONTENT);
    lv_obj_set_height(digits4, LV_SIZE_CONTENT);
    lv_obj_set_x(digits4, 240);
    lv_obj_set_y(digits4, 0);
    lv_obj_add_flag(digits4, LV_OBJ_FLAG_ADV_HITTEST );
    lv_obj_clear_flag(digits4, LV_OBJ_FLAG_SCROLLABLE );
	
    digits5=lv_img_create(lv_scr_act());
    adc_digit[4]=digits5;
    lv_img_set_src(digits5, &digit_blue_4);
    lv_obj_set_width(digits5, LV_SIZE_CONTENT);
    lv_obj_set_height(digits5, LV_SIZE_CONTENT);
    lv_obj_set_x(digits5, 320);
    lv_obj_set_y(digits5, 0);
    lv_obj_add_flag(digits5, LV_OBJ_FLAG_ADV_HITTEST );
    lv_obj_clear_flag(digits5, LV_OBJ_FLAG_SCROLLABLE );
	
    digits6=lv_img_create(lv_scr_act());
    adc_digit[5]=digits6;
    lv_img_set_src(digits6, &digit_blue_5);
    lv_obj_set_width(digits6, LV_SIZE_CONTENT);
    lv_obj_set_height(digits6, LV_SIZE_CONTENT);
    lv_obj_set_x(digits6, 400);
    lv_obj_set_y(digits6, 0);
    lv_obj_add_flag(digits6, LV_OBJ_FLAG_ADV_HITTEST );
    lv_obj_clear_flag(digits6, LV_OBJ_FLAG_SCROLLABLE );

}

更新显示

void update_blue_disp(char* adc)
{
    uint8_t i;

    for(i = 0; i < 6; i++)
    {
        if(adc[i] == '.'){
            lv_img_set_src(adc_digit[i], digit_blue_frame_group[10]);
        }
        else if(adc[i] >= '0' && adc[i] <= '9'){
            // 将字符转换为对应的整数值
            lv_img_set_src(adc_digit[i], digit_blue_frame_group[adc[i] - '0']);
        }
        else {
            // 处理无效字符的情况，例如显示空白或默认值
            lv_img_set_src(adc_digit[i], digit_blue_frame_group[0]); // 或其他默认处理
        }
    }
}

横屏显示：

所以将036设置为0x28或0xe8为横屏显示
{2, {0x36, 0x28}, MIPI_DSI_CMD_ID_DCS_SHORT_WRITE_1_PARAM, MIPI_DSI_CMD_FLAG_LOW_POWER},

二、ADC取样

使用adc0

adc基本属性：

通道0：

中断设置

通道0对应P004

采集函数：

void adc_sample(void)
{
   float adc_val;
   char adc_str[6]={0};
   //开始采集
   R_ADC_ScanStart(&g_adc0_ctrl);
   while(false == adc_complete_flag);
   adc_complete_flag = false;
   //读取结果
   R_ADC_Read(&g_adc0_ctrl, ADC_CHANNEL_0, &adc_result);

   uint32_t adc_mv = adc_result * 3300 / 4096;
   sprintf(adc_str, "%d.%04d", adc_mv / 1000, adc_mv % 1000); // 显示4位小数
   //更新显示结果
   update_blue_disp(adc_str);
}

ADC中断函数，修改采集标识

/* Callback function */
void user_adc_callback(adc_callback_args_t *p_args)
{
    /* TODO: add your own code here */
    if(ADC_EVENT_SCAN_COMPLETE == p_args->event)
    {
        adc_complete_flag = true;
    }
}

三、主程序

void hal_entry(void)
{
    /* TODO: add your own code here */
	//LVGL初始化
    lv_init();
	//板级初始化
    board_init();
 
    // 设置默认屏幕的背景色
    static lv_style_t style_screen;
    lv_style_init(&style_screen);
    lv_style_set_bg_color(&style_screen, lv_color_hex(0x000000));  // 蓝色背景
    lv_style_set_bg_opa(&style_screen, LV_OPA_COVER);              // 不透明度100%
    lv_obj_add_style(lv_scr_act(), &style_screen, 0);

	//调用数字显示对象初始化
    digit_blue_disp();

    /* Initialize RTC driver */
    rtc_init();

    g_set_time.tm_hour=12;
    g_set_time.tm_min=30;
    g_set_time.tm_sec=30;
    g_set_time.tm_year=2025;
    g_set_time.tm_mon=10;
    g_set_time.tm_yday=11;
    R_RTC_CalendarTimeSet(&g_rtc0_ctrl, &g_set_time);
    set_rtc_periodic_rate();


    //ADC输出化
    R_ADC_Open(&g_adc0_ctrl, &g_adc0_cfg);
    R_ADC_ScanCfg(&g_adc0_ctrl, &g_adc0_channel_cfg);


    lv_obj_t *scr = lv_scr_act();
	//建立RTC显示对象
    label= lv_label_create(scr);
    while (1)
    {
        lv_timer_handler();
		
		//判读RTC中断标识
        if(g_periodic_irq_flag==SET_FLAG)
        {
            g_periodic_irq_flag=RESET_FLAG;
			//更新rtc显示，并更新ADC显示
            update_Time_disp();
        }
        R_BSP_SoftwareDelay(3, BSP_DELAY_UNITS_MILLISECONDS);

    }
#if BSP_TZ_SECURE_BUILD
    /* Enter non-secure code */
    R_BSP_NonSecureEnter();
#endif
}

update_Time_disp函数：

void update_Time_disp(void)
{
	//获取RTC时间
    R_RTC_CalendarTimeGet(&g_rtc0_ctrl, &g_present_time);
    rtc_date_readability_update(&g_present_time);
	//获取ADC采样并显示
    adc_sample();
	//显示RTC时间
    lv_label_set_text_fmt(label, "%02d:%02d:%02d",g_present_time.tm_hour,g_present_time.tm_min,g_present_time.tm_sec);
    lv_obj_set_size(label, 160, 30);
    lv_obj_align(label, LV_ALIGN_TOP_MID, 0, 150);
    static lv_style_t style;
    lv_style_init(&style);
    lv_style_set_text_font(&style, &lv_font_montserrat_28);
    lv_style_set_text_color(&style, lv_color_hex(0xFFFFFF));
    lv_obj_add_style(label, &style, 0);
}