Adafruit_ImageReader QSPI support

[jake653]

There are 22 examples included in the Adafruit_ImageReader library, with this bit of code:

#if defined(__SAMD51__) || defined(NRF52840_XXAA)
    Adafruit_FlashTransport_QSPI flashTransport(PIN_QSPI_SCK, PIN_QSPI_CS,
      PIN_QSPI_IO0, PIN_QSPI_IO1, PIN_QSPI_IO2, PIN_QSPI_IO3);

The example code fragment appears in this tutorial
https://learn.adafruit.com/adafruit-gfx-graphics-library/loading-images

This is an offered alternative to the SP card support some of their modules have.

Probably dumb to ask if it could be tricked to work with RP2040s with external RAM.
(I may be looking at this again for ESP32S3 with 16MB Flash)

(I don't really know how the FS allocation in the Flash Size menu is typically used)
I got the QSPI RAM pins from the VCC-GND YD RP2040 schematic, should anyone have use for it.

PIN_QSPI_SCK 52
PIN_QSPI_CS (SS) 56
PIN_QSPI_IO0 53
PIN_QSPI_IO1 55
PIN_QSPI_IO2 54
PIN_QSPI_IO3 51

This tangent started trying to use their example to test an LCD, choking on:

[(SPI_INTERFACES_COUNT <> 1]
Adafruit_FlashTransport_SPI flashTransport(SS1, &SPI1);

Getting error with SS1, have not found it's definition.

Will be glad to see the #1297 flash menu updated with the 2, 4, 8, 16 Mb options in 3.1.1?
I have seen a few Aliexpress sellers of VCC-GND clones? with those 4 different ram options.
(all rather over-priced)
The seller I use has 16MB for $0.28 more than a 4MB board.
You can get 4 - 16MB boards at a time, with shipping for $3.13 ea.