Update README.md.

  * Remove broken reference to sample code.
  * Add feature flag docs.

1 files changed, 12 insertions, 20 deletions

diff --git a/README.md b/README.md
index 3f1bb0a..ffcdcd7 100644
--- a/README.md
+++ b/README.md
@@ -6,28 +6,20 @@
 This is a [usb-host](https://github.com/bjc/usb-host) driver for
 Atmel's SAMD series of chips.
 
-# Examples
-
-## (Sort of) Simple Example
+# Feature flags
 
-This assumes you have an [Adafruit Trinket
-M0](https://www.adafruit.com/product/3500). You'll need to make
-modifications to `Makefile` and `examples/simple/main.rs` for your
-board otherwise.
+To enable support for your MCU, you need to enable its feature. One
+of: `samd21g18a`, `samd21e18a`, `samd51g19a`, `samd51j19a`,
+`samd51j20a`.
 
-You'll need at least `bossac` installed somewhere in your path in
-order to actually do the flashing. You'll also need rust installed for
-your target device.
+So far this library has been tested on the following boards:
 
-1) Connect a serial port to your device (the Trinket M0 uses pin 4 to
-do UART transmission at TTL voltage).
+  - [Adafruit Trinket M0](https://www.adafruit.com/product/3500)
+    (samd21e18a)
+  - [Adafruit Feather M0](https://www.adafruit.com/product/2772)
+    (samd21g18a)
 
-2) Plug the device in, put it into firmware-update mode (double-tap
-the reset button on the Trinket M0) and run `make flash`. When it's
-done you should see boot messages on your serial device.
+# Examples
 
-3) Unplug the device from the computer, hook it up to another power
-supply somehow (I wire GND to ground and USB to 5V), plug in a
-keyboard, and hit some keys. You should see it print out the keyboard
-reports as keys are pressed and released. Alternately, you may see
-error messages if something is broken.
+You can find a project utilizing this library for a USB to I²C bridge
+[here](https://github.com/bjc/bleusb/tree/master/usb).