Update piemod keymap (#2786)

Add RGB control, fix keymap to work with latest QMK.

Squashed commit of the following:

commit 3c5d95e4809d446fe5304aab9274d527182835e6
Author: dwrz <dwrz@dwrz.net>
Date:   Sat Apr 21 18:26:58 2018 +0000

    Make rules.mk for Let's Split piemod

commit 0cc5fc135220f0eb48509d2b027e4cad033d74a5
Author: dwrz <dwrz@dwrz.net>
Date:   Sat Apr 21 18:26:25 2018 +0000

    Add RGB control keys to function layer

commit d1b6bfa5f34123658534f99c97471b779b971ffb
Author: dwrz <dwrz@dwrz.net>
Date:   Sat Apr 21 18:26:03 2018 +0000

    Refactor MACROS to COMBOS

    MACROS was conflicting with existing code.

commit ce2f47b13fb3bfab9d63292ddba466879d300051
Author: dwrz <dwrz@dwrz.net>
Date:   Sat Apr 21 18:25:26 2018 +0000

    Add typing options to config.h

commit cb0aa62b81a17aaaee1f9843138495b9ca14b6d4
Author: dwrz <dwrz@dwrz.net>
Date:   Sat Apr 21 18:25:10 2018 +0000

    Add RGB options to config.h

3 files changed, 38 insertions, 34 deletions

diff --git a/keyboards/lets_split/keymaps/piemod/config.h b/keyboards/lets_split/keymaps/piemod/config.h
index 5a6261c4f7..001b62e41b 100644
--- a/keyboards/lets_split/keymaps/piemod/config.h
+++ b/keyboards/lets_split/keymaps/piemod/config.h
@@ -34,4 +34,16 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 // #define MASTER_RIGHT
 // #define EE_HANDS
 
+// RGB Options
+#undef RGBLED_NUM
+#define RGBLED_NUM 10
+#define RGBLIGHT_SLEEP
+#define RGBLIGHT_ANIMATIONS
+#define RGBLIGHT_EFFECT_SNAKE_LENGTH 1
+#define RGBLIGHT_EFFECT_KNIGHT_LENGTH 1
+
+// Typing Options
+#define PREVENT_STUCK_MODIFIERS
+#define QMK_KEYS_PER_SCAN 4
+
 #endif
diff --git a/keyboards/lets_split/keymaps/piemod/keymap.c b/keyboards/lets_split/keymaps/piemod/keymap.c
index 762d8c2742..fca96bf39a 100644
--- a/keyboards/lets_split/keymaps/piemod/keymap.c
+++ b/keyboards/lets_split/keymaps/piemod/keymap.c
@@ -10,7 +10,7 @@ extern keymap_config_t keymap_config;
 #define _NUMBER 3 // F(3)
 #define _FUNCTION 4 // F(4)
 #define _EMACS 5 // F(5)
-#define _MACROS 6 // F(6)
+#define _COMBOS 6 // F(6)
 #define _MOUSE 7 // F(7)
 
 enum custom_keycodes {
@@ -20,17 +20,17 @@ enum custom_keycodes {
   NUMBER,
   FUNCTION,
   EMACS,
-  MACROS,
+  COMBOS,
   MOUSE,
 };
 
 const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 
 [_DVORAK] = LAYOUT( \
-  KC_ESC,  KC_QUOTE,  F(7),  KC_DOT,  KC_P,  KC_Y,  KC_F,  KC_G,  KC_C,  KC_R,  KC_L,  KC_DELETE, \
-  KC_TAB,  F(1),  F(2),  F(3),  F(4),  KC_I,  KC_D,  KC_H,  KC_T,  KC_N,  KC_S,  KC_ENTER, \
-  KC_LSHIFT,  KC_SCOLON,  F(5),   KC_J,   KC_K,  KC_X,   KC_B,   KC_M,   KC_W,  KC_V,  KC_Z,  KC_MINUS, \
-  F(10), F(6),  KC_MENU, KC_LALT,  KC_LGUI,  KC_BSPACE,  KC_SPACE,  KC_RCTRL,  KC_LEFT,  KC_DOWN,  KC_UP, KC_RIGHT \
+  KC_ESC,  KC_QUOTE,  LT(7, KC_COMMA),  KC_DOT,  KC_P,  KC_Y,  KC_F,  KC_G,  KC_C,  KC_R,  KC_L,  KC_DELETE, \
+  KC_TAB,  LT(1, KC_A),  LT(2, KC_O),  LT(3, KC_E),  LT(4, KC_U),  KC_I,  KC_D,  KC_H,  KC_T,  KC_N,  KC_S,  KC_ENTER, \
+  KC_LSHIFT,  KC_SCOLON,  LT(5, KC_Q),   KC_J,   KC_K,  KC_X,   KC_B,   KC_M,   KC_W,  KC_V,  KC_Z,  KC_MINUS, \
+  F(1), LT(6, KC_LCTRL),  KC_MENU, KC_LALT,  KC_LGUI,  KC_BSPACE,  KC_SPACE,  KC_RCTRL,  KC_LEFT,  KC_DOWN,  KC_UP, KC_RIGHT \
 ),
 
 [_ARROW] = LAYOUT( \
@@ -42,7 +42,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 
 [_SYMBOL] = LAYOUT( \
   KC_TILD,  KC_GRAVE,  KC_NO,  KC_EQUAL,  KC_PLUS,  KC_NO,  KC_LBRACKET,  KC_RBRACKET,  KC_AMPR,  KC_ASTR,  KC_LPRN,  KC_RPRN, \
-  KC_NO,  KC_NO,  KC_TRNS,  KC_SCOLON,  KC_COLN,  KC_NO,  KC_LCBR,  KC_RCBR,  KC_DLR,  KC_PERC,  KC_CIRC,  F(21), \
+  KC_NO,  KC_NO,  KC_TRNS,  KC_SCOLON,  KC_COLN,  KC_NO,  KC_LCBR,  KC_RCBR,  KC_DLR,  KC_PERC,  KC_CIRC,  F(2), \
   KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_BSLASH,  KC_SLASH,  KC_EXLM,  KC_AT,  KC_HASH,  KC_PIPE, \
   KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_ASTR,   KC_SLASH,  KC_MINUS,  KC_PLUS,  KC_EQUAL \
 ),
@@ -56,9 +56,9 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
 
 [_FUNCTION] = LAYOUT( \
   KC_PSCREEN,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_F1,  KC_F2,  KC_F3,  KC_F4,  KC_F5,  KC_F6, \
-  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_TRNS,  KC_NO,  KC_F7,  KC_F8,  KC_F9,  KC_F10,  KC_F11,  KC_F12, \
-  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO, KC_NO,  KC_AUDIO_MUTE,  KC_AUDIO_VOL_DOWN,  KC_AUDIO_VOL_UP,  KC_MEDIA_PLAY_PAUSE, \
-  RESET,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_DELETE,  KC_INSERT,  KC_HOME,  KC_PGDN,  KC_PGUP,  KC_END \
+  KC_NO,  RGB_HUI,  RGB_SAI,  RGB_VAI,  KC_TRNS,  KC_NO,  KC_F7,  KC_F8,  KC_F9,  KC_F10,  KC_F11,  KC_F12, \
+  KC_NO,  RGB_HUD,  RGB_SAD,  RGB_VAD,  KC_NO,  KC_NO,  KC_NO, KC_NO,  KC_AUDIO_MUTE,  KC_AUDIO_VOL_DOWN,  KC_AUDIO_VOL_UP,  KC_MEDIA_PLAY_PAUSE, \
+  RESET,  RGB_TOG,  RGB_MOD,  KC_NO,  KC_NO,  KC_NO,  KC_DELETE,  KC_INSERT,  KC_HOME,  KC_PGDN,  KC_PGUP,  KC_END \
 ),
 
 [_EMACS] = LAYOUT( \
@@ -68,7 +68,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
   KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO \
 ),
 
-[_MACROS] = LAYOUT( \
+[_COMBOS] = LAYOUT( \
   KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO, \
   KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO, \
   KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO,  KC_NO, \
@@ -93,29 +93,8 @@ enum function_id {
 int CAPSLOCKED = 0;
 
   const uint16_t PROGMEM fn_actions[] = {
-
-    // DVORAK 0
-    // ARROW 1, F(1)
-    // SYMBOL 2, F(2)
-    // NUMBER 3, F(3)
-    // FUNCTION 4, F(4)
-    // EMACS 5, F(5)
-    // MACROS 6, F(6)
-    // MOUSE 7, F(7)
-
-    // Layers
-    [1] =  ACTION_LAYER_TAP_KEY(1, KC_A),     // FN1 = Momentary Arrow layer on A.
-    [2] =  ACTION_LAYER_TAP_KEY(2, KC_O),     // FN2 = Momentary symbOl layer on O.
-    [3] =  ACTION_LAYER_TAP_KEY(3, KC_E),     // FN3 = Momentary numbEr layer on E.
-    [4] =  ACTION_LAYER_TAP_KEY(4, KC_U),     // FN4 = Momentary fUnction layer on U.
-    [5] =  ACTION_LAYER_TAP_KEY(5, KC_Q),     // FN5 = Momentary emaQs layer on Q.
-    [6] =  ACTION_LAYER_TAP_KEY(6, KC_LCTRL), // FN6 = Momentary MACROS on ??? key.
-    [7] =  ACTION_LAYER_TAP_KEY(7, KC_COMMA), // FN7 = Momentary MOUSE on , key.
-
     // Special Keys
-    [10] =  ACTION_MODS_KEY(KC_LCTRL, KC_LALT), // FN10 = Ctrl + Alt.
-
+    [1] =  ACTION_MODS_KEY(KC_LCTRL, KC_LALT), // FN10 = Ctrl + Alt.
     // Symbols
-    [21] =  ACTION_MODS_KEY(MOD_LSFT, KC_SLASH), // FN21 = Question mark.
-
+    [2] =  ACTION_MODS_KEY(MOD_LSFT, KC_SLASH), // FN21 = Question mark.
   };
diff --git a/keyboards/lets_split/keymaps/piemod/rules.mk b/keyboards/lets_split/keymaps/piemod/rules.mk
new file mode 100644
index 0000000000..027ea977e7
--- /dev/null
+++ b/keyboards/lets_split/keymaps/piemod/rules.mk
@@ -0,0 +1,13 @@
+BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
+EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
+CONSOLE_ENABLE = no         # Console for debug(+400)
+COMMAND_ENABLE = yes        # Commands for debug and configuration
+NKRO_ENABLE = yes            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+BACKLIGHT_ENABLE = no      # Enable keyboard backlight functionality
+MIDI_ENABLE = no            # MIDI controls
+AUDIO_ENABLE = no           # Audio output on port C6
+UNICODE_ENABLE = yes         # Unicode
+BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
+RGBLIGHT_ENABLE = yes       # Enable WS2812 RGB underlight.  Do not enable this with audio at the same time.
+SUBPROJECT_rev1 = no