New keyboard: Cu75 (#2374)

* Added Modular keyboards L,R and NUM

Created code modules for the 3 modules of the modular keyboard.
Original idea by MechboardsUK. Uses i2c implementation similar to lets
split

* Remove modular from master

This is to fix incorrect branching

* Addition of cu75

Addition of cu75 keyboard, uses libraries from LFKeyboards directory which are path linked to reduce file duplication.

Minor fix on cu24 readme

* Minor Readme Fix

1 files changed, 41 insertions, 0 deletions

diff --git a/keyboards/cu75/rules.mk b/keyboards/cu75/rules.mk
new file mode 100644
index 000000000..a84343f05
--- /dev/null
+++ b/keyboards/cu75/rules.mk
@@ -0,0 +1,41 @@
+MCU = atmega32u4
+OPT_DEFS += -DBOOTLOADER_SIZE=4096
+
+
+# Processor frequency.
+#     This will define a symbol, F_CPU, in all source code files equal to the
+#     processor frequency in Hz. You can then use this symbol in your source code to
+#     calculate timings. Do NOT tack on a 'UL' at the end, this will be done
+#     automatically to create a 32-bit value in your source code.
+#
+#     This will be an integer division of F_USB below, as it is sourced by
+#     F_USB after it has run through any CPU prescalers. Note that this value
+#     does not *change* the processor frequency - it should merely be updated to
+#     reflect the processor speed set externally so that the code can use accurate
+#     software delays.
+F_CPU = 16000000
+
+
+#
+# LUFA specific
+#
+# Target architecture (see library "Board Types" documentation).
+ARCH = AVR8
+
+# Input clock frequency.
+#     This will define a symbol, F_USB, in all source code files equal to the
+#     input clock frequency (before any prescaling is performed) in Hz. This value may
+#     differ from F_CPU if prescaling is used on the latter, and is required as the
+#     raw input clock is fed directly to the PLL sections of the AVR for high speed
+#     clock generation for the USB and other AVR subsections. Do NOT tack on a 'UL'
+#     at the end, this will be done automatically to create a 32-bit value in your
+#     source code.
+#
+#     If no clock division is performed on the input clock inside the AVR (via the
+#     CPU clock adjust registers or the clock division fuses), this will be equal to F_CPU.
+F_USB = $(F_CPU)
+
+# Interrupt driven control endpoint task(+60)
+OPT_DEFS += -DINTERRUPT_CONTROL_ENDPOINT
+
+SRC = ../lfkeyboards/TWIlib.c ../lfkeyboards/issi.c ../lfkeyboards/lighting.c
\ No newline at end of file