Sorry to bump such an old thread… but to be honest, there is NOT a lot of documentation for the Circuits @ Home USB Host (mini) Shield and the Pro Micro out there…
Since I’m using a +3.3v Pro Micro…
I have done the required mods to get +5v to the VBUS
&
Connecting (jumper) the RESET pin on the USB Host to the correct RESET pin on the Pro Micro…
When I run the Boards_QC test sketch…I get an error:
Circuits @ Home: 2011
USB Host Shield Quality Control Routine
Reading Revision Register: Die Revision invalid Value Returned: 00
Unrecoverable error: test halted!
0×55 pattern is transmitted via SPI
Press RESET to restart test
Which is (I believe) do to the fact that the Pro Micro, does NOT have the same pin# for the SPI bus as the Pro Mini does…
and even more so, the Pro Micro doesnt have the SS pin broken out to an I/O….
The SS pin seems to be connected to the yellow RX led on the board???
I’d rather not mod/cut traces on the board… is there any other way to re-define the SS pin?
Like turning the default SS pin to an output? and then using another pin or something instead?
I also have NOT done the board updates I see above?
Being this is a few years old… is this still required to get the Pro Micro working?
And can anyone explain the edit a little bit?
Maybe this is where I can re-define the SS pin to be used??
Thanks for any feedback or direction!
-xl