[keyboard] Add chavdai40 keyboard (#9820)

* On branch add_chavdai40_keyboard

Changes to be committed:
	new file:   keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.c
	new file:   keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.h
	new file:   keyboards/chavdai40/boards/GENERIC_STM32_F042X6/board.mk
	new file:   keyboards/chavdai40/bootloader_defs.h
	new file:   keyboards/chavdai40/chavdai40.c
	new file:   keyboards/chavdai40/chavdai40.h
	new file:   keyboards/chavdai40/chconf.h
	new file:   keyboards/chavdai40/config.h
	new file:   keyboards/chavdai40/halconf.h
	new file:   keyboards/chavdai40/info.json
	new file:   keyboards/chavdai40/keymaps/42keys-dvorak/config.h
	new file:   keyboards/chavdai40/keymaps/42keys-dvorak/keymap.c
	new file:   keyboards/chavdai40/keymaps/42keys-eucalyn/config.h
	new file:   keyboards/chavdai40/keymaps/42keys-eucalyn/keymap.c
	new file:   keyboards/chavdai40/keymaps/42keys-qwerty/config.h
	new file:   keyboards/chavdai40/keymaps/42keys-qwerty/keymap.c
	new file:   keyboards/chavdai40/keymaps/44keys-dvorak/config.h
	new file:   keyboards/chavdai40/keymaps/44keys-dvorak/keymap.c
	new file:   keyboards/chavdai40/keymaps/44keys-eucalyn/config.h
	new file:   keyboards/chavdai40/keymaps/44keys-eucalyn/keymap.c
	new file:   keyboards/chavdai40/keymaps/44keys-qwerty/config.h
	new file:   keyboards/chavdai40/keymaps/44keys-qwerty/keymap.c
	new file:   keyboards/chavdai40/keymaps/default/config.h
	new file:   keyboards/chavdai40/keymaps/default/keymap.c
	new file:   keyboards/chavdai40/mcuconf.h
	new file:   keyboards/chavdai40/readme.md
	new file:   keyboards/chavdai40/rules.mk

* commit suggestions of zvecr and fauxpark, thanks

* commit suggestions of fauxpark, thanks

* commit suggestions of fauxpark, thanks

* commit suggestions of drashna, thanks

1 files changed, 49 insertions, 0 deletions

diff --git a/keyboards/chavdai40/chavdai40.h b/keyboards/chavdai40/chavdai40.h
new file mode 100644
index 0000000000..a10f695c78
--- /dev/null
+++ b/keyboards/chavdai40/chavdai40.h
@@ -0,0 +1,49 @@
+/* Copyright 2020 t-miyajima
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#pragma once
+
+#define XXX KC_NO
+
+#include "quantum.h"
+
+// This a shortcut to help you visually see your layout.
+
+#define LAYOUT_44key( \
+    k01, k02, k03, k04, k05, k06, k07, k08, k09, k10, k11, k12, k13, \
+    k14 , k15, k16, k17, k18, k19, k20, k21, k22, k23, k24,  k25   , \
+     k26 ,  k27, k28, k29, k30, k31, k32, k33, k34, k35,  k36,  k37, \
+         k38,  k39,      k40,         k41,   k42,   k43,   k44       \
+) { \
+    { k01, k02, k03, k04, k05, k06, k07, k08, k09, k10, k11, k12, k13 }, \
+    { k14, k15, k16, k17, k18, k19, k20, k21, k22, k23, k24, k25, XXX }, \
+    { k26, k27, k28, k29, k30, k31, k32, k33, k34, k35, k36, k37, XXX }, \
+    { k38, k39, XXX, k40, XXX, k41, XXX, XXX, k42, k43, k44, XXX, XXX }  \
+}
+
+#define LAYOUT_42key( \
+    k01, k02, k03, k04, k05, k06, k07, k08, k09, k10, k11, k12, k13, \
+    k14 , k15, k16, k17, k18, k19, k20, k21, k22, k23, k24,  k25   , \
+     k26 ,  k27, k28, k29, k30, k31, k32, k33, k34, k35,  k36,  k37, \
+         k38,  k39,                   k41,          k43,   k44       \
+) { \
+    { k01, k02, k03, k04, k05, k06, k07, k08, k09, k10, k11, k12, k13 }, \
+    { k14, k15, k16, k17, k18, k19, k20, k21, k22, k23, k24, k25, XXX }, \
+    { k26, k27, k28, k29, k30, k31, k32, k33, k34, k35, k36, k37, XXX }, \
+    { k38, k39, XXX, XXX, XXX, k41, XXX, XXX, XXX, k43, k44, XXX, XXX }  \
+}
+