Added support for Adafruit NRF52832 Feather

[ar664]

Used this pr as a reference:
#614

I successfully flashed it and it went through USB.Init without error.
Will report back when I have tested it with my original xbox controller. If anyone would like to test it in the mean time, feel free to do so.

[Lauszus]

Looks good. Can you also add it to the list of supported boards: https://github.com/felis/USB_Host_Shield_2.0#boards and the CI: https://github.com/felis/USB_Host_Shield_2.0/blob/master/.github/workflows/main.yml#L48?

[ar664]

Would the CI be like this?

pio ci --lib="." --board=adafruit_feather_nrf52832 --project-option="build_flags=-Wno-sign-compare -Wno-unused-function -Wno-unused-variable"

How do I test this?

[Lauszus]

Simply add it to the other NRF52 board i.e:

pio ci --lib="." --board=adafruit_feather_nrf52840 --board=adafruit_feather_nrf52832 --project-option="build_flags=-Wno-sign-compare -Wno-unused-function -Wno-unused-variable"

Then commit and push it and the CI will trigger and build it automatically.

[ar664]

It working was a false positive. I ran the board_qc sketch and I get this.

Reading REVISION register... Die revision invalid. Value returned: FF
Unrecoverable error - test halted!!
0x55 pattern is transmitted via SPI

I have the duinofun mini board and have the SPI connected correctly after checking the pins with the MAX3421E datasheet. Do I need to connect the Reset pin in the MAX3421E

Edit: I believe my host shield is defective. I ordered one of the same type and another one of a different type. I'll update you when I receive and test them.

[ar664]

Do I need to modify my setup with any pull down resistors?

• Serial is working
• SPI is correctly wired, given MAX3421E spec sheet
• Nrf52832 spec says it's able to output 3.3v 500ma, so I assume the host is able to be powered
• The SS Pin measured 3.3V
• I don't have oscilloscope, but I measure a peak of .4V from the SPI signals.

Don't mind the mess, but here is a visual of the current setup. (If you need a diagram lmk).

In addition to the before example 00 is also returned by both sometimes with board_qc.

Reading REVISION register... Die revision invalid. Value returned: 00
Unrecoverable error - test halted!!
0x55 pattern is transmitted via SPI

Both of them come up with the same result with XBOXONE example:

OSC did not start

or

XBOX USB Library Started
BSP Library : 0.22.1
Bootloader  : s132 6.1.1
Serial No   : FC7C7CD0DB9ECC34

but no input is detected and no white light indicator on the xbox controller.

The xbox controller does vibrate indicating that power was received.
I'm using a powered usb hub to power the whole thing with an external power supply, should be good up to 5v 2000ma. I've ran usb hdd's off of it.

[xxxajk]

If you still get unreliable operation, there's two things that can cause this that many people do not realize.
1: Keep SPI lines as short as possible
2: If you can't use shorter wires, lower the SPI speed.
3: A combination of 1 and 2.