Add cijanzen Pearl 40% keymap (qmk#2878)

* Add personal keymap for Pearl 40%

* Updating readme and adding keymap image

* Updated readme

* Force make to use Python 3

* cleanup keymap

* updated keymap image

* update readme for new keymap image

* reverting atmega32a_program

* removed redundant sections of user config and rules

* fixed user config file

* fixed led indicators to properly show layer 4

keyboards/pearl/keymaps/cijanzen/README.md

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+# cijanzen's Pearl 40%
+
+## Layout
+
+The firmware offers five layers:
+
+1. Base layer
+2. Numbers and arrows (Fn1)
+3. F-row and navigation (Fn2)
+4. Media and RGB controls (Fn3)
+5. Utils (Fn2+Fn3)
+
+A few specifics worth mentioning:
+- Autoshift has been enabled to allow for easier access of shifted keys
+- Tab will operate as tab key on tap and fn layer on hold
+- Indicator LEDs indicate the current layer
+
+
+![cijanzen's Pearl 40% layout](https://raw.githubusercontent.com/christopherjanzen/qmk_firmware/bab090ee24866e6c38892ffc5ffa53813aec3832/keyboards/pearl/keymaps/cijanzen/pearl-cijanzen-keymap.jpg)
+
+Base for this firmware copied from jetpacktuxedo's and rask's QMK firmware
+
+---
+
+## Compiling and flashing
+
+To compile and flash the HEX follow the [Pearl 40% instructions](https://gist.github.com/clee/a43f198a70de0e6dae22d7638b41440a).
+
+You might need to check the comments at the bottom of the gist as well.

keyboards/pearl/keymaps/cijanzen/config.h

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+/*
+Copyright 2017 Luiz Ribeiro <[email protected]>
+
+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/>.
+*/
+
+#ifndef CONFIG_USER_H
+#define CONFIG_USER_H
+
+#include QMK_KEYBOARD_CONFIG_H
+
+#undef BACKLIGHT_LEVELS
+#define BACKLIGHT_LEVELS 3
+
+
+#endif

keyboards/pearl/keymaps/cijanzen/keymap.c

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+#include QMK_KEYBOARD_H
+
+#define ____ KC_TRNS
+// Tab on tap or Function layer 1 on hold
+#define FN_TAB LT(1, KC_TAB)
+#define KC_SLP KC_SYSTEM_SLEEP
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    // BASE LAYER
+    [0] = LAYOUT_all(
+        KC_ESC,    KC_Q,      KC_W,      KC_E,      KC_R,      KC_T,      KC_Y,      KC_U,      KC_I,      KC_O,      KC_P,      KC_LBRC,   KC_RBRC,
+        FN_TAB,    KC_A,      KC_S,      KC_D,      KC_F,      KC_G,      KC_H,      KC_J,      KC_K,      KC_L,      KC_SCLN,              KC_ENT,
+        KC_LSFT,   KC_Z,      KC_X,      KC_C,      KC_V,      KC_B,      KC_N,      KC_M,      KC_COMM,   KC_DOT,    KC_SLSH,              MO(2),
+                   KC_LCTL,   KC_LALT,   KC_LGUI,   KC_BSPC,   KC_BSPC,              KC_SPC,               MO(3),     MO(1)
+    ),
+    // BASE LAYER TWO (Fn1)
+    [1] = LAYOUT_all(
+        KC_GRV,    KC_1,      KC_2,      KC_3,      KC_4,      KC_5,      KC_6,      KC_7,      KC_8,      KC_9,      KC_0,      KC_MINS,    KC_EQL,
+        ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      KC_UP,     KC_QUOT,               KC_BSLS,
+        ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      KC_LEFT,   KC_DOWN,   KC_RGHT,               KC_RSFT,
+                   ____,      ____,      ____,      KC_DEL,    KC_DEL,               ____,                 KC_RGUI,   ____
+    ),
+    // FROW LAYER AND ARROWS (Fn2)
+    [2] = LAYOUT_all(
+        KC_ESC,    KC_F1,     KC_F2,     KC_F3,     KC_F4,     KC_F5,     KC_F6,     KC_F7,     KC_F8,     KC_F9,     KC_F10,    KC_F11,     KC_F12,
+        ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      KC_PGUP,   ____,                  ____,
+        ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      KC_HOME,   KC_PGDN,   KC_END,                ____,
+                   MO(4),     ____,      ____,      ____,      ____,                 ____,                 ____,      ____
+    ),
+    // MEDIA AND RGB (Fn3)
+    [3] = LAYOUT_all(
+        ____,      RGB_M_P,   RGB_M_B,   RGB_M_R,   RGB_M_SW,  RGB_M_SN,  RGB_M_K,   RGB_M_X,   RGB_M_G,   KC_MPRV,   KC_MPLY,   KC_MNXT,    KC_DEL,
+        ____,      ____,      ____,      RGB_HUI,   RGB_SAI,   RGB_VAI,   ____,      ____,      ____,      ____,      ____,                  ____,
+        ____,      RGB_MOD,   RGB_TOG,   RGB_HUD,   RGB_SAD,   RGB_VAD,   BL_TOGG,   BL_STEP,   ____,      ____,      ____,                  ____,
+                   ____,      ____,      ____,      ____,      ____,                 ____,                 ____,      ____
+    ),
+    // UTIL (Fn1+Fn3)
+    [4] = LAYOUT_all(
+        KC_SLP,    ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      KC_PSCR,    RESET,
+        ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,                  ____,
+        ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,      ____,                  ____,
+                   ____,      ____,      ____,      ____,      ____,                 ____,                 ____,      ____
+    ),
+};
+
+/**
+ * Status LED layer indicators courtesy of jetpacktuxedo's firmware
+ */
+uint32_t layer_state_set_kb(uint32_t state)
+{
+  if (state & (1<<1)) { // if we are on layer 1
+    PORTD |= (1 << PD0); // light num lock led
+  } else if (state & (1<<2)) { // if we are on layer 2
+
+    if (state & (1<<4)) {
+      PORTD |= (1 << PD0); // light all indicator leds
+      PORTD |= (1 << PD1);
+      PORTD |= (1 << PD6);
+    } else {
+      PORTD &= ~(1 << PD0);
+      PORTD |= (1 << PD1); // light caps lock led
+      PORTD &= ~(1 << PD6);
+    }
+  } else if (state & (1<<3)) { // if we are on layer 3
+    PORTD |= (1 << PD6); // light scroll lock led
+  } else if (state & (1<<4)) { // if we are stuck on layer 4
+    PORTD |= (1 << PD0); // light all indicator leds
+    PORTD |= (1 << PD1);
+    PORTD |= (1 << PD6);
+  } else {
+    PORTD &= ~(1 << PD0);
+    PORTD &= ~(1 << PD1);
+    PORTD &= ~(1 << PD6);
+  }
+
+  return state;
+}

keyboards/pearl/keymaps/cijanzen/rules.mk

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+# build options
+BOOTMAGIC_ENABLE = yes
+MOUSEKEY_ENABLE = no
+EXTRAKEY_ENABLE = yes
+CONSOLE_ENABLE = no
+COMMAND_ENABLE = yes
+BACKLIGHT_ENABLE = yes
+RGBLIGHT_ENABLE = yes
+RGBLIGHT_CUSTOM_DRIVER = yes
+# TAP_DANCE_ENABLE = yes
+AUTO_SHIFT_ENABLE = yes