[Keyboard] Update Grandiceps to Rev2 (#14618)

Co-authored-by: Ryan <fauxpark@gmail.com>
Co-authored-by: Dasky <32983009+daskygit@users.noreply.github.com>
Co-authored-by: Thys de Wet <thys@vectorphoto.co.uk>

1 files changed, 14 insertions, 0 deletions

diff --git a/keyboards/tkw/grandiceps/readme.md b/keyboards/tkw/grandiceps/readme.md
index 894f1c8d7a..57a6dac28d 100644
--- a/keyboards/tkw/grandiceps/readme.md
+++ b/keyboards/tkw/grandiceps/readme.md
@@ -8,12 +8,26 @@ ARM split keyboard with RGB underglow and encoders.
 * Hardware Supported: f411 blackpill
 * Hardware Availability: [grandiceps](https://github.com/vattern/grandiceps)
 
+There are two versions of the Grandiceps. Please use the appropriate firmware for your board.
+
+* Revision 2 has I2C eeprom and support for a Pimoroni trackball.
+
 Make example for this keyboard (after setting up your build environment):
 
     make tkw/grandiceps:default
+    make tkw/grandiceps/rev2:default
 
 Flashing example for this keyboard:
 
     make tkw/grandiceps:default:flash
+    make tkw/grandiceps/rev2:default:flash
 
 See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
+
+## Bootloader
+
+Enter the bootloader in 3 ways:
+
+* **Bootmagic reset**: Hold down the key at (0,0) in the matrix (usually the top left key or Escape) and plug in the keyboard
+* **Physical reset buttons**: Hold down the BOOT0 button and then briefly press the NRST button on the BlackPill PCB.
+* **Keycode in layout**: Press the key mapped to `RESET` if it is available