esp-who/examples/code_recognition/main/app_peripherals.c

#include "app_peripherals.h"
#include "esp_log.h"
#include "esp_system.h"

static const char *TAG = "app_peripherals";

esp_err_t app_camera_init()
{
    ESP_LOGI(TAG, "Camera module is %s", CAMERA_MODULE_NAME);

#if CONFIG_CAMERA_MODULE_ESP_EYE || CONFIG_CAMERA_MODULE_ESP32_CAM_BOARD
    /* IO13, IO14 is designed for JTAG by default,
     * to use it as generalized input,
     * firstly declair it as pullup input */
    gpio_config_t conf;
    conf.mode = GPIO_MODE_INPUT;
    conf.pull_up_en = GPIO_PULLUP_ENABLE;
    conf.pull_down_en = GPIO_PULLDOWN_DISABLE;
    conf.intr_type = GPIO_INTR_DISABLE;
    conf.pin_bit_mask = 1LL << 13;
    gpio_config(&conf);
    conf.pin_bit_mask = 1LL << 14;
    gpio_config(&conf);
#endif

    camera_config_t config;
    config.ledc_channel = LEDC_CHANNEL_0;
    config.ledc_timer = LEDC_TIMER_0;
    config.pin_d0 = CAMERA_PIN_D0;
    config.pin_d1 = CAMERA_PIN_D1;
    config.pin_d2 = CAMERA_PIN_D2;
    config.pin_d3 = CAMERA_PIN_D3;
    config.pin_d4 = CAMERA_PIN_D4;
    config.pin_d5 = CAMERA_PIN_D5;
    config.pin_d6 = CAMERA_PIN_D6;
    config.pin_d7 = CAMERA_PIN_D7;
    config.pin_xclk = CAMERA_PIN_XCLK;
    config.pin_pclk = CAMERA_PIN_PCLK;
    config.pin_vsync = CAMERA_PIN_VSYNC;
    config.pin_href = CAMERA_PIN_HREF;
    config.pin_sscb_sda = CAMERA_PIN_SIOD;
    config.pin_sscb_scl = CAMERA_PIN_SIOC;
    config.pin_pwdn = CAMERA_PIN_PWDN;
    config.pin_reset = CAMERA_PIN_RESET;
    config.xclk_freq_hz = XCLK_FREQ_HZ;
    config.pixel_format = CAMERA_PIXFORMAT;
    config.frame_size = CAMERA_FRAME_SIZE;
    config.jpeg_quality = 12;
    config.fb_count = CAMERA_FB_COUNT;
    config.fb_location = CAMERA_FB_IN_PSRAM;
    config.grab_mode = CAMERA_GRAB_WHEN_EMPTY;

    // camera init
    esp_err_t err = esp_camera_init(&config);
    if (err != ESP_OK)
    {
        ESP_LOGE(TAG, "Camera init failed with error 0x%x", err);
        return ESP_FAIL;
    }

    sensor_t *s = esp_camera_sensor_get();
    if (s->id.PID == OV3660_PID || s->id.PID == OV2640_PID)
        s->set_vflip(s, 1); //flip it back
    else if (s->id.PID == GC0308_PID){
        s->set_hmirror(s, 0);
    }
    else if (s->id.PID == GC032A_PID){
        s->set_vflip(s, 1);
        // s->set_hmirror(s, 0); //something wrong
    }

    if (s->id.PID == OV3660_PID)
    {
        s->set_brightness(s, 2);
        s->set_contrast(s, 3);
    }

    return ESP_OK;
}


#ifdef LCD_CONTROLLER
esp_err_t app_lcd_init(esp_lcd_panel_handle_t *panel_handle){
    gpio_config_t bk_gpio_config = {
        .mode = GPIO_MODE_OUTPUT,
        .pin_bit_mask = 1ULL << LCD_BCKL
    };
    ESP_ERROR_CHECK(gpio_config(&bk_gpio_config));
    gpio_set_level(LCD_BCKL, LCD_BK_LIGHT_OFF_LEVEL);

    spi_bus_config_t bus_conf = {
        .sclk_io_num = LCD_SCLK,
        .mosi_io_num = LCD_MOSI,
        .miso_io_num = LCD_MISO,
        .quadwp_io_num = -1,
        .quadhd_io_num = -1,
        .max_transfer_sz = LCD_H_RES * LCD_V_RES * sizeof(uint16_t),
    };
    ESP_ERROR_CHECK(spi_bus_initialize(SPI2_HOST, &bus_conf, SPI_DMA_CH_AUTO));

    ESP_LOGI(TAG, "Install panel IO");
    esp_lcd_panel_io_handle_t io_handle = NULL;
    esp_lcd_panel_io_spi_config_t io_config = {
        .dc_gpio_num = LCD_DC,
        .cs_gpio_num = LCD_CS,
        .pclk_hz = LCD_PIXEL_CLOCK_HZ,
        .lcd_cmd_bits = LCD_CMD_BITS,
        .lcd_param_bits = LCD_PARAM_BITS,
        .spi_mode = 0,
        .trans_queue_depth = 10,
    };
    // Attach the LCD to the SPI bus
    ESP_ERROR_CHECK(esp_lcd_new_panel_io_spi((esp_lcd_spi_bus_handle_t)SPI2_HOST, &io_config, &io_handle));

    // ESP_LOGI(TAG, "Install ST7789 panel driver");
    esp_lcd_panel_dev_config_t panel_config = {
        .reset_gpio_num = LCD_RST,
        .rgb_endian = LCD_RGB_ENDIAN_RGB,
        .bits_per_pixel = 16,
    };
    ESP_ERROR_CHECK(esp_lcd_new_panel_st7789(io_handle, &panel_config, panel_handle));
    ESP_ERROR_CHECK(esp_lcd_panel_reset(*panel_handle));
    ESP_ERROR_CHECK(esp_lcd_panel_init(*panel_handle));
    
    #if CONFIG_CAMERA_MODULE_ESP_S2_KALUGA
    esp_lcd_panel_invert_color(*panel_handle, false);
    esp_lcd_panel_mirror(*panel_handle, 1, 0); //mirror_x
    esp_lcd_panel_swap_xy(*panel_handle, 1);//swap_xy
    #else
    esp_lcd_panel_invert_color(*panel_handle, true);// Set inversion for esp32s3eye
    #endif

    // turn on display
    esp_lcd_panel_disp_on_off(*panel_handle, true);

    gpio_set_level(LCD_BCKL, LCD_BK_LIGHT_ON_LEVEL);
    return ESP_OK;
}
#endif