Function USB_INIT

Code/PocketMage_V3/src/OS_APPS/USB.cpp:112–206

}

void USB_INIT() {
  usb_is_shutting_down = false;
  
  // Switch USB contol to ESP
  PowerSystem.setUSBControlESP();

  // OPEN USB FILE TRANSFER
  OLED().oledWord("Initializing USB");
  pocketmage::setCpuSpeed(240);
  delay(50);

  disableTimeout = true;

  if (mscEnabled) return;

  ESP_LOGI(TAG, "Unmounting SD_MMC for USB MSC...");

  SD_MMC.end();  // unmount FS before raw access
  delay(200);    // Give the card hardware a moment to settle state

  // Configure SDMMC host and slot manually
  sdmmc_host_t host = SDMMC_HOST_DEFAULT();
  host.max_freq_khz = SDMMC_FREQ_DEFAULT; // Force 20MHz for stability
  
  sdmmc_slot_config_t slot_config = SDMMC_SLOT_CONFIG_DEFAULT();
  slot_config.clk = (gpio_num_t)SD_CLK;
  slot_config.cmd = (gpio_num_t)SD_CMD;
  slot_config.d0 = (gpio_num_t)SD_D0;
  slot_config.d1 = (gpio_num_t)0;
  slot_config.d2 = (gpio_num_t)0;
  slot_config.d3 = (gpio_num_t)0;
  slot_config.width = 1;  // or 4 for 4-bit mode
  
  // CRITICAL FIX: Force internal pull-ups to prevent ESP_ERR_TIMEOUT
  slot_config.flags |= SDMMC_SLOT_FLAG_INTERNAL_PULLUP;

  // Initialize host
  esp_err_t err = sdmmc_host_init();
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "Host init failed %s\n", esp_err_to_name(err));
    OLED().sysMessage("Host init failed: " + String(esp_err_to_name(err)),2000);
    return;
  }

  err = sdmmc_host_init_slot(SDMMC_HOST_SLOT_1, &slot_config);
  if (err != ESP_OK) {
    ESP_LOGE(TAG, "Slot init failed: %s\n", esp_err_to_name(err));
    OLED().sysMessage("Slot init failed: " + String(esp_err_to_name(err)),2000);
    sdmmc_host_deinit();
    return;
  }

  // Allocate card object and mount
  card = (sdmmc_card_t*)malloc(sizeof(sdmmc_card_t));
  if (!card) {
    ESP_LOGE(TAG, "Failed to allocate card struct\n", esp_err_to_name(err));
    OLED().sysMessage("Failed malloc: " + String(esp_err_to_name(err)),2000);
    sdmmc_host_deinit();