Function start

Platforms/platform-esp32/source/drivers/esp32_sdspi.cpp:52–118

};

static error_t start(Device* device) {
    LOG_I(TAG, "start %s", device->name);

    auto* parent = device_get_parent(device);
    if (device_get_type(parent) != &SPI_CONTROLLER_TYPE) {
        LOG_E(TAG, "Parent device is not an SPI controller");
        return ERROR_INVALID_STATE;
    }

    auto* data = new (std::nothrow) Esp32SdspiInternal();
    if (!data) return ERROR_OUT_OF_MEMORY;

    data->lock();
    device_set_driver_data(device, data);

    auto* config = GET_CONFIG(device);

    bool pins_ok =
        acquire_pin_or_set_null(config->pin_cd, &data->pin_cd_descriptor) &&
        acquire_pin_or_set_null(config->pin_wp, &data->pin_wp_descriptor) &&
        acquire_pin_or_set_null(config->pin_int, &data->pin_int_descriptor);

    if (!pins_ok) {
        LOG_E(TAG, "Failed to acquire one or more pins");
        data->cleanup_pins();
        device_set_driver_data(device, nullptr);
        data->unlock();
        delete data;
        return ERROR_RESOURCE;
    }

    GpioPinSpec cs_pin_spec;
    if (esp32_spi_get_cs_pin(device, &cs_pin_spec) != ERROR_NONE) {
        LOG_E(TAG, "Failed to get CS pin from parent SPI controller");
        data->cleanup_pins();
        device_set_driver_data(device, nullptr);
        data->unlock();
        delete data;
        return ERROR_RESOURCE;
    }

    auto* spi_config = static_cast<const Esp32SpiConfig*>(parent->config);

    // Lower all CS pins
    esp32_spi_deselect_all_cs(parent);
    // Manually set the CS pin fo
    gpio_set_direction(static_cast<gpio_num_t>(cs_pin_spec.pin), GPIO_MODE_OUTPUT);
    gpio_set_level(static_cast<gpio_num_t>(cs_pin_spec.pin), 255);

    data->fs_handle = esp32_sdspi_fs_alloc(config, spi_config->host, cs_pin_spec.pin, "/sdcard");
    if (!data->fs_handle) {
        data->cleanup_pins();
        device_set_driver_data(device, nullptr);
        data->unlock();
        delete data;
        return ERROR_OUT_OF_MEMORY;
    }