ibm4704_usb: Add Makefiles for TMK Converter

converter/ibm4704_usb/Makefile

@@ -23,8 +23,8 @@ CONFIG_H = config.h
 
 
 # MCU name
-#MCU = at90usb1287
-MCU = atmega32u4
+# TMK Converter rev.2
+MCU ?= atmega32u2
 
 # Processor frequency.
 #     This will define a symbol, F_CPU, in all source code files equal to the

converter/ibm4704_usb/Makefile.tmk_rev1

@@ -0,0 +1,5 @@
+# TMK Converter rev.1
+# which looks like this:
+# https://github.com/tmk/keyboard_converter#pcb-rev1
+MCU = atmega32u4
+include Makefile

converter/ibm4704_usb/Makefile.tmk_rev2

@@ -0,0 +1,6 @@
+# TMK Converter rev.2
+# which looks like this:
+# https://github.com/tmk/keyboard_converter#pcb-rev2
+MCU = atmega32u2
+include Makefile
+

converter/ibm4704_usb/README.md

@@ -47,22 +47,35 @@ Keyboard Plug from front:
 
 Connection
 ----------
-In case of using ATMega32U4(Teensy2.0):
+In case of using ATMega32U4/U2
 
 1. Supply power with VCC and GND.
 2. Connect CLOCK to PD1 and DATA to PD0. You can change pin with config.h.
 3. Optionally you may need pull-up register. 1KOhm probably work.
 
+TMK Converter can supports IBM 4704.
+https://github.com/tmk/keyboard_converter
+
 
 Build Firmware
 --------------
 Just run `make`:
 
-    $ make
+    $ make -f <makefile>
+
+For TMK Converter rev.1 use `Makefile.tmk_rev1` as makefile:
+
+    $ make -f Makefile.tmk_rev1
+
+For TMK Converter rev.2 use `Makefile.tmk_rev2` as makefile:
+
+    $ make -f Makefile.tmk_rev2
 
 To select keymap:
 
-    $ make KEYMAP=[plain|...]
+    $ make -f <makefile> KEYMAP=[plain|...]
+
+To indentify your TMK Converter revision see [this](https://github.com/tmk/keyboard_converter#pcb-revisions).
 
 
 Keymap