Update 42. Keebs Frood support for Rev7

[piit79]

42. Keebs Frood Rev7 uses a new 4 MB flash chip (Winbond W25Q32JVUUIQ)

[jepler]

I think you need to list the flash chip of all revisions here, separated by commas:

EXTERNAL_FLASH_DEVICES = "ZD25WQ16B, W25Q64JVxQ"

Otherwise, I think that running this on an older revision board with the ZD... chip would fail.

Typical example from an adafruit board:

ports/atmel-samd/boards/circuitplayground_express/mpconfigboard.mk:EXTERNAL_FLASH_DEVICES = "S25FL216K, GD25Q16C"

The syntax seems to be written "A","B" in some places and "A, B" in others. I'd use the syntax shown above.

[dhalbert]

W25Q64JVUUIQ is 8MB (64 Mbit). This new build will not work on the old boards with 2MB flash. Or are there no old boards?

[piit79]

Thanks @jepler, I had no idea I could do that! The firmware indeed works with both the new (Winbond 4 MB) and the old (Zetta 2 MB) board revisions.

[piit79]

Thanks for spotting that, @dhalbert - I copied the wrong device identifier. The latest revision of my board uses W25Q32JVUUIQ, a 4 MB chip.

Funnily enough CircuitPython did actually work with the wrong second device identifier on both the old (2 MB) and the new (4 MB) boards in a simple "LED blink" test...

[jepler]

Thanks for making that change!