From 2b4a56de3d090686f62d25ea34042759dc4352d6 Mon Sep 17 00:00:00 2001 From: Kristian Sloth Lauszus Date: Tue, 2 Dec 2014 17:46:05 -0800 Subject: [PATCH] Added note about SPI pins used on Arduino Uno --- README.md | 2 ++ 1 file changed, 2 insertions(+) diff --git a/README.md b/README.md index 4d84061f..e7f4ed56 100644 --- a/README.md +++ b/README.md @@ -285,6 +285,8 @@ More information about the controller can be found at the following sites: The shield is using SPI for communicating with the MAX3421E USB host controller. It uses the SCK, MISO and MOSI pins via the ICSP on your board. +Note this means that it uses pin 13, 12, 11 on an Arduino Uno, so these pins can not be used for anything else! + Furthermore it uses one pin as SS and one INT pin. These are by default located on pin 10 and 9 respectively. They can easily be reconfigured in case you need to use them for something else by cutting the jumper on the shield and then solder a wire from the pad to the new pin. After that you need modify the following entry in [UsbCore.h](UsbCore.h):