Adds Proton C Conversion (#4661)

* adds proton c base

* fixes custom matrix include

* adds readme.md

* initial proton coversion, no pin mapping

* start of mcu selection

* add pin mapping and sweet16 test

* add at90 to list

* disable backlight, fix d7

* update flag names

* doc updates

* proton c update for mcu selection

1 files changed, 54 insertions, 33 deletions

diff --git a/build_keyboard.mk b/build_keyboard.mk
index b639b92d3..1d60f3ad7 100644
--- a/build_keyboard.mk
+++ b/build_keyboard.mk
@@ -16,6 +16,7 @@ include common.mk
 KEYBOARD_FILESAFE := $(subst /,_,$(KEYBOARD))
 TARGET ?= $(KEYBOARD_FILESAFE)_$(KEYMAP)
 KEYBOARD_OUTPUT := $(BUILD_DIR)/obj_$(KEYBOARD_FILESAFE)
+STM32_PATH := quantum/stm32
 
 # Force expansion
 TARGET := $(TARGET)
@@ -72,6 +73,7 @@ ifneq ("$(wildcard $(KEYBOARD_PATH_1)/)","")
     KEYBOARD_PATHS += $(KEYBOARD_PATH_1)
 endif
 
+
 # Pull in rules.mk files from all our subfolders
 ifneq ("$(wildcard $(KEYBOARD_PATH_5)/rules.mk)","")
     include $(KEYBOARD_PATH_5)/rules.mk
@@ -89,6 +91,58 @@ ifneq ("$(wildcard $(KEYBOARD_PATH_1)/rules.mk)","")
     include $(KEYBOARD_PATH_1)/rules.mk
 endif
 
+
+MAIN_KEYMAP_PATH_1 := $(KEYBOARD_PATH_1)/keymaps/$(KEYMAP)
+MAIN_KEYMAP_PATH_2 := $(KEYBOARD_PATH_2)/keymaps/$(KEYMAP)
+MAIN_KEYMAP_PATH_3 := $(KEYBOARD_PATH_3)/keymaps/$(KEYMAP)
+MAIN_KEYMAP_PATH_4 := $(KEYBOARD_PATH_4)/keymaps/$(KEYMAP)
+MAIN_KEYMAP_PATH_5 := $(KEYBOARD_PATH_5)/keymaps/$(KEYMAP)
+
+ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_5)/keymap.c)","")
+    -include $(MAIN_KEYMAP_PATH_5)/rules.mk
+    KEYMAP_C := $(MAIN_KEYMAP_PATH_5)/keymap.c
+    KEYMAP_PATH := $(MAIN_KEYMAP_PATH_5)
+else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_4)/keymap.c)","")
+    -include $(MAIN_KEYMAP_PATH_4)/rules.mk
+    KEYMAP_C := $(MAIN_KEYMAP_PATH_4)/keymap.c
+    KEYMAP_PATH := $(MAIN_KEYMAP_PATH_4)
+else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_3)/keymap.c)","")
+    -include $(MAIN_KEYMAP_PATH_3)/rules.mk
+    KEYMAP_C := $(MAIN_KEYMAP_PATH_3)/keymap.c
+    KEYMAP_PATH := $(MAIN_KEYMAP_PATH_3)
+else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_2)/keymap.c)","")
+    -include $(MAIN_KEYMAP_PATH_2)/rules.mk
+    KEYMAP_C := $(MAIN_KEYMAP_PATH_2)/keymap.c
+    KEYMAP_PATH := $(MAIN_KEYMAP_PATH_2)
+else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_1)/keymap.c)","")
+    -include $(MAIN_KEYMAP_PATH_1)/rules.mk
+    KEYMAP_C := $(MAIN_KEYMAP_PATH_1)/keymap.c
+    KEYMAP_PATH := $(MAIN_KEYMAP_PATH_1)
+else ifneq ($(LAYOUTS),)
+    include build_layout.mk
+else
+    $(error Could not find keymap)
+    # this state should never be reached
+endif
+
+ifeq ($(strip $(CTPC)), yes)
+  CONVERT_TO_PROTON_C=yes
+endif
+
+ifeq ($(strip $(CONVERT_TO_PROTON_C)), yes)
+    TARGET := $(TARGET)_proton_c
+    include $(STM32_PATH)/proton_c.mk
+    OPT_DEFS += -DCONVERT_TO_PROTON_C
+endif
+
+include quantum/mcu_selection.mk
+
+ifdef MCU_FAMILY
+    OPT_DEFS += -DQMK_STM32
+    KEYBOARD_PATHS += $(STM32_PATH)
+endif
+
+
 # Find all the C source files to be compiled in subfolders.
 KEYBOARD_SRC :=
 
@@ -227,39 +281,6 @@ PROJECT_DEFS := $(OPT_DEFS)
 PROJECT_INC := $(VPATH) $(EXTRAINCDIRS) $(KEYBOARD_PATHS)
 PROJECT_CONFIG := $(CONFIG_H)
 
-MAIN_KEYMAP_PATH_1 := $(KEYBOARD_PATH_1)/keymaps/$(KEYMAP)
-MAIN_KEYMAP_PATH_2 := $(KEYBOARD_PATH_2)/keymaps/$(KEYMAP)
-MAIN_KEYMAP_PATH_3 := $(KEYBOARD_PATH_3)/keymaps/$(KEYMAP)
-MAIN_KEYMAP_PATH_4 := $(KEYBOARD_PATH_4)/keymaps/$(KEYMAP)
-MAIN_KEYMAP_PATH_5 := $(KEYBOARD_PATH_5)/keymaps/$(KEYMAP)
-
-ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_5)/keymap.c)","")
-    -include $(MAIN_KEYMAP_PATH_5)/rules.mk
-    KEYMAP_C := $(MAIN_KEYMAP_PATH_5)/keymap.c
-    KEYMAP_PATH := $(MAIN_KEYMAP_PATH_5)
-else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_4)/keymap.c)","")
-    -include $(MAIN_KEYMAP_PATH_4)/rules.mk
-    KEYMAP_C := $(MAIN_KEYMAP_PATH_4)/keymap.c
-    KEYMAP_PATH := $(MAIN_KEYMAP_PATH_4)
-else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_3)/keymap.c)","")
-    -include $(MAIN_KEYMAP_PATH_3)/rules.mk
-    KEYMAP_C := $(MAIN_KEYMAP_PATH_3)/keymap.c
-    KEYMAP_PATH := $(MAIN_KEYMAP_PATH_3)
-else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_2)/keymap.c)","")
-    -include $(MAIN_KEYMAP_PATH_2)/rules.mk
-    KEYMAP_C := $(MAIN_KEYMAP_PATH_2)/keymap.c
-    KEYMAP_PATH := $(MAIN_KEYMAP_PATH_2)
-else ifneq ("$(wildcard $(MAIN_KEYMAP_PATH_1)/keymap.c)","")
-    -include $(MAIN_KEYMAP_PATH_1)/rules.mk
-    KEYMAP_C := $(MAIN_KEYMAP_PATH_1)/keymap.c
-    KEYMAP_PATH := $(MAIN_KEYMAP_PATH_1)
-else ifneq ($(LAYOUTS),)
-    include build_layout.mk
-else
-    $(error Could not find keymap)
-    # this state should never be reached
-endif
-
 # Userspace setup and definitions
 ifeq ("$(USER_NAME)","")
     USER_NAME := $(KEYMAP)