How to use VSPI on ESP32 with Adafruit_SPIFlash - arduino

Question

I'm trying to use VSPI port of ESP32-WROVER with "Adafruit_SPIFlash.h" library https://github.com/adafruit/Adafruit_SPIFlash
This question is similar to How to use SPI with ESP32 and Arduino , but I'm using "Adafruit_SPIFlash.h" library.
This library seems to be using ESP32-WROVER "internal" SPI port, where WROVER SPI FLASH chip is connected, as a default. I have another SPI FLASH chip connected to VSPI port which I'm trying to use to store some sensor data.
I tried changing CUSTOM_SPI statement, but code doesn't compile
#define CUSTOM_SPI SPI //tried changing SPI to: VSPI, &VSPI, SPI1, SPI2, &SPI2
I asked this from Adafruit forum and got answer: "Create a Adafruit_FlashTransport_SPI object for the secondary SPI interface, then feed that to the Adafruit_SPIFlash object when you create it." Unfortunately I'm so nooby on FW things that this didn't help me and my follow up question is not answered.
For example how would I need to modify sketch below to use VSPI?
// The MIT License (MIT)
// Copyright (c) 2019 Ha Thach for Adafruit Industries
#include "SdFat.h"
#include "Adafruit_SPIFlash.h"
// Uncomment to run example with custom SPI and SS e.g with FRAM breakout
// #define CUSTOM_CS A5
// #define CUSTOM_SPI SPI
#if defined(CUSTOM_CS) && defined(CUSTOM_SPI)
Adafruit_FlashTransport_SPI flashTransport(CUSTOM_CS, CUSTOM_SPI);
#elif defined(ARDUINO_ARCH_ESP32)
// ESP32 use same flash device that store code.
// SPIFlash can use partition table to detect fatfs partition
// Therefore there is no need to specify the SPI and SS
Adafruit_FlashTransport_ESP32 flashTransport;
#elif defined(ARDUINO_ARCH_RP2040)
// RP2040 use same flash device that store code.
// Therefore there is no need to specify the SPI and SS
// Use default (no-args) constructor to be compatible with CircuitPython partition scheme
Adafruit_FlashTransport_RP2040 flashTransport;
// For generic usage: Adafruit_FlashTransport_RP2040(start_address, size)
// If start_address and size are both 0, value that match filesystem setting in
// 'Tools->Flash Size' menu selection will be used
#else
// On-board external flash (QSPI or SPI) macros should already
// defined in your board variant if supported
// - EXTERNAL_FLASH_USE_QSPI
// - EXTERNAL_FLASH_USE_CS/EXTERNAL_FLASH_USE_SPI
#if defined(EXTERNAL_FLASH_USE_QSPI)
Adafruit_FlashTransport_QSPI flashTransport;
#elif defined(EXTERNAL_FLASH_USE_SPI)
Adafruit_FlashTransport_SPI flashTransport(EXTERNAL_FLASH_USE_CS, EXTERNAL_FLASH_USE_SPI);
#else
#error No QSPI/SPI flash are defined on your board variant.h !
#endif
#endif
Adafruit_SPIFlash flash(&flashTransport);
/* If you want to use a specific flash device, for example for a custom built board, first look for it in Adafruit_SPIFlash\src\flash_devices.h
* If it isn't in there you need to create your own definition like the W25Q80DLX_EXAMPLE example below.
* These definitions need to be edited to match information on the data sheet of the flash device that you want to use.
* If you are not sure what the manufacture ID, memory type and capacity values should be, try running the sketch anyway and look at the serial output
* The flash device will report these values to you as a single hexadecimal value (the JDEC ID)
* For example, the first device on the list - the W25Q80DLX - will report its JDEC ID as 0xef4014, which is made of these three values:
* manufacturer_id = 0xef
* memory_type = 0x40
* capacity = 0x14
* With this macro properly defined you can then create an array of device definitions as shown below, this can include any from the list of devices in flash_devices.h, and any you define yourself here
* You need to update the variable on line 71 to reflect the number of items in the array
* You also need to uncomment line 84 and comment out line 81 so this array will be passed to the flash memory driver.
*
* Example of a user defined flash memory device:
#define W25Q80DLX_EXAMPLE \
{ \
.total_size = 1*1024*1024, \
.start_up_time_us = 5000, .manufacturer_id = 0xef, \
.memory_type = 0x40, .capacity = 0x14, .max_clock_speed_mhz = 80, \
.quad_enable_bit_mask = 0x02, .has_sector_protection = false, \
.supports_fast_read = true, .supports_qspi = true, \
.supports_qspi_writes = false, .write_status_register_split = false, \
.single_status_byte = false, .is_fram = false, \
}
*/
/*
* Create an array of data structures and fill it with the settings we defined above.
* We are using two devices, but more can be added if you want.
*/
//static const SPIFlash_Device_t my_flash_devices[] = {
// W25Q80DLX_EXAMPLE,
//};
/*
* Specify the number of different devices that are listed in the array we just created. If you add more devices to the array, update this value to match.
*/
//const int flashDevices = 1;
// the setup function runs once when you press reset or power the board
void setup()
{
Serial.begin(115200);
while ( !Serial ) delay(100); // wait for native usb
Serial.println("Adafruit Serial Flash Info example");
flash.begin();
//Using a flash device not already listed? Start the flash memory by passing it the array of device settings defined above, and the number of elements in the array.
//flash.begin(my_flash_devices, flashDevices);
Serial.print("JEDEC ID: 0x"); Serial.println(flash.getJEDECID(), HEX);
Serial.print("Flash size: "); Serial.print(flash.size() / 1024); Serial.println(" KB");
}
void loop()
{
// nothing to do
}