15 files changed, 1396 insertions(+), 0 deletions(-)

A keyboards/rubi/config.h
A keyboards/rubi/info.json
A keyboards/rubi/keymaps/default/keymap.c
A keyboards/rubi/keymaps/default/readme.md
A keyboards/rubi/keymaps/via/keymap.c
A keyboards/rubi/keymaps/via/rules.mk
A keyboards/rubi/lib/calc.c
A keyboards/rubi/lib/encoder.c
A keyboards/rubi/lib/glcdfont.c
A keyboards/rubi/lib/oled.c
A keyboards/rubi/lib/oled.h
A keyboards/rubi/readme.md
A keyboards/rubi/rubi.c
A keyboards/rubi/rubi.h
A keyboards/rubi/rules.mk

@@ 0,0 1,65 @@
+/*
+Copyright 2021 gregorio
+
+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
+
+#include "config_common.h"
+
+/* USB Device descriptor parameter */
+#define VENDOR_ID    0x4752
+#define PRODUCT_ID   0x5242
+#define DEVICE_VER   0x0001
+#define MANUFACTURER gregorio
+#define PRODUCT      Rubi
+
+/* key matrix size */
+#define MATRIX_ROWS 5
+#define MATRIX_COLS 4
+
+/*
+ * Keyboard Matrix Assignments
+ *
+ * Change this to how you wired your keyboard
+ * COLS: AVR pins used for columns, left to right
+ * ROWS: AVR pins used for rows, top to bottom
+ * DIODE_DIRECTION: COL2ROW = COL = Anode (+), ROW = Cathode (-, marked on diode)
+ *                  ROW2COL = ROW = Anode (+), COL = Cathode (-, marked on diode)
+ *
+ */
+#define MATRIX_ROW_PINS { F0, F1, F4, F5, F6 }
+#define MATRIX_COL_PINS { B3, B2, B1, F7 }
+#define UNUSED_PINS
+
+#define ENCODERS_PAD_A { D7 }
+#define ENCODERS_PAD_B { D6 }
+
+/* COL2ROW, ROW2COL */
+#define DIODE_DIRECTION COL2ROW
+
+/* Debounce reduces chatter (unintended double-presses) - set 0 if debouncing is not needed */
+#define DEBOUNCE 5
+
+/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
+#define LOCKING_SUPPORT_ENABLE
+/* Locking resynchronize hack */
+#define LOCKING_RESYNC_ENABLE
+
+/* disable these deprecated features by default */
+#define NO_ACTION_MACRO
+#define NO_ACTION_FUNCTION
+
+#define OLED_FONT_H "lib/glcdfont.c"

@@ 0,0 1,31 @@
+{
+   "keyboard_name": "Rubi",
+   "url": "https://github.com/ohchiko/qmk_firmware/tree/master/keyboards/rubi",
+   "maintainer": "gregorio",
+   "width": 4,
+   "height": 5,
+   "layouts": {
+      "LAYOUT": {
+         "layout": [
+            {"x":3, "y":0},
+            {"x":0, "y":1.25},
+            {"x":1, "y":1.25},
+            {"x":2, "y":1.25},
+            {"x":3, "y":1.25},
+            {"x":0, "y":2.25},
+            {"x":1, "y":2.25},
+            {"x":2, "y":2.25},
+            {"x":3, "y":2.25, "h":2},
+            {"x":0, "y":3.25},
+            {"x":1, "y":3.25},
+            {"x":2, "y":3.25},
+            {"x":0, "y":4.25},
+            {"x":1, "y":4.25},
+            {"x":2, "y":4.25},
+            {"x":3, "y":4.25, "h":2},
+            {"x":0, "y":5.25, "w":2},
+            {"x":2, "y":5.25}
+         ]
+      }
+   }
+}<
\ No newline at end of file

@@ 0,0 1,58 @@
+/* Copyright 2020 gregorio
+ *
+ * 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/>.
+ */
+#include QMK_KEYBOARD_H
+
+
+// enum custom_keycodes {
+//     FIRST = NEW_SAFE_RANGE,
+// };
+
+// Defines names for use in layer keycodes and the keymap
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    /* Base */
+    [0] = LAYOUT(
+                                       ENC_PRESS,
+            KC_NLCK, KC_PSLS, KC_PAST, KC_PMNS,
+            KC_P7  , KC_P8  , KC_P9  , KC_PPLS,
+            KC_P4  , KC_P5  , KC_P6  ,
+            KC_P1  , KC_P2  , KC_P3  , KC_PENT,
+                     KC_P0  , LT(2, KC_PDOT)
+            ),
+    [1] = LAYOUT(
+                                       KC_TRNS,
+            KC_C   , KC_SLSH, CL_STAR, KC_MINS,
+            KC_7   , KC_8   , KC_9   , CL_PLUS,
+            KC_4   , KC_5   , KC_6   ,
+            KC_1   , KC_2   , KC_3   , KC_EQL,
+                     KC_0   , KC_DOT
+            ),
+    [2] = LAYOUT(
+                                       KC_TRNS,
+            KC_TRNS, KC_N   , KC_S   , KC_R   ,
+            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+            KC_TRNS, KC_TRNS, KC_TRNS,
+            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+                     KC_TRNS, KC_TRNS
+            ),
+    [3] = LAYOUT(
+                                       KC_TRNS,
+            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+            KC_TRNS, RESET  , KC_TRNS,
+            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+                     KC_TRNS, KC_TRNS
+            ),
+};

@@ 0,0 1,4 @@
+# The default keymap for Rubi
+
+[KLE](http://www.keyboard-layout-editor.com/#/gists/984e9039971cf4738d507150b4494190)
+![Rubi Default Keymap](https://i.imgur.com/bsG8BdW.jpg)

@@ 0,0 1,53 @@
+/* Copyright 2020 gregorio
+ *
+ * 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/>.
+ */
+#include QMK_KEYBOARD_H
+
+// Defines names for use in layer keycodes and the keymap
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    /* Base */
+    [0] = LAYOUT(
+                                       ENC_PRESS,
+            KC_NLCK, KC_PSLS, KC_PAST, KC_PMNS,
+            KC_P7  , KC_P8  , KC_P9  , KC_PPLS,
+            KC_P4  , KC_P5  , KC_P6  ,
+            KC_P1  , KC_P2  , KC_P3  , KC_PENT,
+                     KC_P0  , LT(2, KC_PDOT)
+            ),
+    [1] = LAYOUT(
+                                       KC_TRNS,
+            KC_C   , KC_SLSH, CL_STAR, KC_MINS,
+            KC_7   , KC_8   , KC_9   , CL_PLUS,
+            KC_4   , KC_5   , KC_6   ,
+            KC_1   , KC_2   , KC_3   , KC_EQL,
+                     KC_0   , KC_DOT
+            ),
+    [2] = LAYOUT(
+                                       KC_TRNS,
+            KC_TRNS, KC_N   , KC_S   , KC_R   ,
+            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+            KC_TRNS, KC_TRNS, KC_TRNS,
+            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+                     KC_TRNS, KC_TRNS
+            ),
+    [3] = LAYOUT(
+                                       KC_TRNS,
+            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+            KC_TRNS, RESET  , KC_TRNS,
+            KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+                     KC_TRNS, KC_TRNS
+            ),
+};

@@ 0,0 1,2 @@
+VIA_ENABLE = yes
+LTO_ENABLE = yes<
\ No newline at end of file

@@ 0,0 1,261 @@
+/*
+This is the modified version of [calculator by MWWorks](https://github.com/MWWorks/mw_calc_numpad/blob/master/calc.c). Below is the quote from [MWWorks](https://github.com/MWWorks).
+
+   Calculator for QMK-based keyboard by MWWorks, https://mwworks.uk
+   This is free, usual disclaimers, don't use it to calculate megaton yields, surgery plans, etc
+
+   I did not plan to reinvent the wheel for this - I figured surely somebody somewhere has working calculator code?
+   Found lots but none that actually work like you expect a calculator to, hence DIYing it
+
+   As such, this is probably a bit janky, especially as I am a bit of a hack at C
+   Seems to be working well, with occasional glitchs, solved by clearing it
+   And some occasional floating-point issues - eg get a long decimal rather than the whole number you were expecting
+   Feel free to fix it! I think it needs to detect the precision of the two operands and then figure out what the precision of the result should be
+
+*/
+#include "rubi.h"
+
+static uint8_t calc_current_operand = 0;
+static char calc_operand_0[CALC_DIGITS+1] = "";
+static char calc_operand_1[CALC_DIGITS+1] = "";
+char calc_result[CALC_DIGITS+1] = "";
+static char calc_status[CALC_DIGITS+1] = "";
+static char calc_operator = ' ';
+static bool calc_reset = false;
+
+
+void calcBegin(void){
+}
+
+//update display
+void calcUpdate(void){
+    if (calc_display_lines == 2) {
+        if((calc_current_operand == 1) || (calc_reset)){
+            strcpy(calc_status, calc_operand_0);
+            if((strlen(calc_operand_0)>0) || (strlen(calc_operand_1)>0)){
+                uint8_t len = strlen(calc_status);
+                if (!(calc_operator == 's' || calc_operator == 'r' || calc_operator == 'n')) {
+                    calc_status[len] = calc_operator;
+                }
+                calc_status[len+1] = 0;
+                if(calc_reset
+                        && !(calc_operator == 's' || calc_operator == 'r' || calc_operator == 'n')){
+                    strncat(calc_status, calc_operand_1, CALC_DIGITS-strlen(calc_status));
+                    calc_operator = ' ';
+                }
+            }
+            strcpy(calc_status_display, calc_status);
+        }
+    } else if (calc_display_lines == 1) {
+        if(calc_reset
+                && !(calc_operator == 's' || calc_operator == 'r' || calc_operator == 'n')){
+            calc_operator = ' ';
+        }
+    }
+    calc_operator_display = calc_operator;
+    strcpy(calc_result_display, calc_result);
+}
+
+//perform calculation on the 2 operands
+void calcOperands(void){
+    float result = 0;
+    switch (calc_operator){
+
+        //standard operators
+        case '+':
+            result = strtod(calc_operand_0, NULL) + strtod(calc_operand_1, NULL);
+            break;
+
+        case '-':
+            result = strtod(calc_operand_0, NULL) - strtod(calc_operand_1, NULL);
+            break;
+
+        case '/':
+            result = strtod(calc_operand_0, NULL) / strtod(calc_operand_1, NULL);
+            break;
+
+        case '*':
+            result = strtod(calc_operand_0, NULL) * strtod(calc_operand_1, NULL);
+            break;
+
+            //single operand operators - these are all in 2
+        case 's':
+            result = sqrt(strtod(calc_operand_0, NULL));
+            break;
+
+        case 'r':
+            result = 1/(strtod(calc_operand_0, NULL));
+            break;
+
+    }
+
+    //now convert the float result into a string
+    //we know the total string size but we need to find the size of the integer component to know how much we have for decimals
+    uint8_t magnitude = ceil(log10(result));
+    uint8_t max_decimals = CALC_DIGITS-magnitude-1;
+    //but max it at 7 because that seems the useful limit of our floats
+    if(max_decimals>7){
+        max_decimals = 7;
+    }
+    dtostrf(result, CALC_DIGITS, max_decimals, calc_result);
+
+    //now to clean up the result - we need it clean as it may be the input of next calculation
+    //this seems a lot of code to format this string :| note that this c doesn't support float in sprintf
+    uint8_t i;
+
+    //first find if theres a dot
+    uint8_t dotpos = CALC_DIGITS+1;
+    for(i=0; i<strlen(calc_result); i++){
+        if(calc_result[i] == '.'){
+            dotpos = i;
+            break;
+        }
+    }
+
+    //if there is, work back to it and remove trailing 0 or .
+    if(dotpos>=0){
+        for(i=strlen(calc_result)-1; i>=dotpos; i--){
+            if((calc_result[i] == '0') || (calc_result[i] == '.')){
+                calc_result[i] = 0;
+            }else{
+                break;
+            }
+        }
+    }
+
+    //now find how many leading spaces
+    uint8_t spaces = 0;
+    for(i=0; i<strlen(calc_result); i++){
+        if(calc_result[i] == ' '){
+            spaces++;
+        }else{
+            break;
+        }
+    }
+
+    //and shift the string
+    for(i=0; i<strlen(calc_result)-spaces; i++){
+        calc_result[i] = calc_result[i+spaces];
+    }
+    calc_result[strlen(calc_result)-spaces] = 0;
+
+    calcUpdate();
+    //the result is available as the first operand for another calculation
+    strcpy(calc_operand_0, calc_result);
+    calc_operand_1[0] = 0;
+
+}
+
+void calcInput(char input){
+    char *operand = calc_operand_0;
+    if(calc_current_operand == 1){
+        operand = calc_operand_1;
+    }
+    uint8_t len = strlen(operand);
+
+    if(
+            ((input >= 48) && (input <= 57)) ||
+            (input == '.')
+      ){
+        //if this is following an equals, then we start from scratch as if new calculation
+        if(calc_reset == true){
+            calc_reset = false;
+            calc_current_operand = 0;
+            calc_operand_0[0] = 0;
+            calc_operand_1[0] = 0;
+            operand = calc_operand_0;
+            len = 0;
+        }
+
+        if(len<CALC_DIGITS){
+            operand[len] = input;
+            operand[len+1] = 0;
+            strcpy(calc_result, operand);
+            calcUpdate();
+        }
+
+        //special input to backspace
+    }else if(input == 'x'){
+        operand[len-1] = 0;
+        strcpy(calc_result, operand);
+        calcUpdate();
+
+        //clear
+    }else if(input == 'c'){
+        operand[0] = 0;
+        calc_operand_0[0] = 0;
+        calc_operand_1[0] = 0;
+        calc_operator = ' ';
+        calc_reset = true;
+        strcpy(calc_result, operand);
+        calcUpdate();
+
+        //special input switch neg/pos
+    }else if((input == 'n') && (len>0)){
+        uint8_t i;
+
+        if(operand[0] == '-'){
+            for(i=1; i<=len; i++){
+                operand[i-1] = operand[i];
+            }
+        }else if(len<CALC_DIGITS){
+            for(i=0; i<=len; i++){
+                operand[len-i+1] = operand[len-i];
+            }
+            operand[0] = '-';
+        }
+        calc_operator = input;
+        strcpy(calc_result, operand);
+        calcUpdate();
+
+
+        //standard 2 operand operators
+    }else if((input == '+') || (input == '-') || (input == '*')  || (input == '/')){
+
+        //get ready for second operand
+        if(calc_current_operand == 0){
+            calc_operator = input;
+            calc_current_operand = 1;
+            calcUpdate();
+
+            //we pressed = we now expect a new second operand
+        }else if(calc_reset){
+            calc_operator = input;
+            calc_reset = false;
+            calc_operand_1[0] = 0;
+            calcUpdate();
+
+        }else {
+            //if we use this on the second operand, calculate first, then ready for a second operand again
+            if (strlen(calc_operand_1)>0){
+                calcOperands();
+            }
+            calc_operand_1[0] = 0;
+            calc_operator = input;
+            calcUpdate();
+        }
+
+
+    }else if(input == '='){
+        //only accept = if we are on the second operand
+        if(calc_current_operand == 1){
+            //keep the second operand for a subsequent press of =; but flag to reset if start entry of new operand
+            calc_reset = true;
+            calcOperands();
+        }
+
+        //single operands - square root and reciprocal - needs to operate on 0 so it works after a previous = result
+    }else if((input == 's') || (input == 'r')){
+        //but maybe we started entering 1
+        if(calc_current_operand == 1 && !calc_reset){
+            strcpy(calc_operand_0, calc_operand_1);
+        }
+        calc_current_operand = 1;
+        calc_operand_1[0] = 0;
+        calc_operator = input;
+        calc_reset = true; //simulate another =
+        calcOperands();
+
+    }
+
+}

@@ 0,0 1,115 @@
+/*
+Copyright 2021 gregorio
+
+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/>.
+*/
+
+#include "rubi.h"
+
+void change_encoder_mode(bool reverse) {
+    if (reverse) {
+        if (encoder_mode == 0) {
+            encoder_mode = _NUM_ENCODER_MODES - 1;
+        } else {
+            encoder_mode = encoder_mode - 1;
+        }
+    } else {
+        encoder_mode = (encoder_mode + 1) % _NUM_ENCODER_MODES;
+    }
+}
+
+uint16_t handle_encoder_cw(void) {
+    uint16_t mapped_code = 0;
+
+    if (oled_mode == OLED_MODE_CALC) {
+        layer_on(2);
+        return mapped_code;
+    }
+
+    switch (encoder_mode) {
+        default:
+        case ENC_MODE_VOLUME:
+            mapped_code = KC_VOLU;
+            break;
+        case ENC_MODE_MEDIA:
+            mapped_code = KC_MEDIA_NEXT_TRACK;
+            break;
+        case ENC_MODE_BRIGHTNESS:
+            mapped_code = KC_BRIGHTNESS_UP;
+            break;
+    }
+
+    return mapped_code;
+}
+
+uint16_t handle_encoder_ccw(void) {
+    uint16_t mapped_code = 0;
+
+    if (oled_mode == OLED_MODE_CALC) {
+        layer_off(2);
+        return mapped_code;
+    }
+
+    switch (encoder_mode) {
+        default:
+        case ENC_MODE_VOLUME:
+            mapped_code = KC_VOLD;
+            break;
+        case ENC_MODE_MEDIA:
+            mapped_code = KC_MEDIA_PREV_TRACK;
+            break;
+        case ENC_MODE_BRIGHTNESS:
+            mapped_code = KC_BRIGHTNESS_DOWN;
+            break;
+    }
+
+    return mapped_code;
+}
+
+uint16_t handle_encoder_press(void) {
+    uint16_t mapped_code = 0;
+    if (get_highest_layer(layer_state) == 1) {
+        if (oled_mode == OLED_MODE_CALC) {
+            layer_on(3);
+        }
+        layer_off(1);
+        return mapped_code;
+    } else if (get_highest_layer(layer_state) == 2) {
+        if (oled_mode == OLED_MODE_CALC) {
+            layer_off(1);
+            layer_on(3);
+        } else {
+            layer_on(1);
+        }
+        layer_off(2);
+        return mapped_code;
+    } else if (get_highest_layer(layer_state) == 3) {
+        if (oled_mode == OLED_MODE_OFF) {
+            layer_off(3);
+        }
+        return mapped_code;
+    }
+
+    switch (encoder_mode) {
+        default:
+        case ENC_MODE_VOLUME:
+            mapped_code = KC_MUTE;
+            break;
+        case ENC_MODE_MEDIA:
+            mapped_code = KC_MEDIA_PLAY_PAUSE;
+            break;
+    }
+
+    return mapped_code;
+}

@@ 0,0 1,246 @@
+/* Copyright 2021 gregorio
+ *
+ * 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
+
+#include "progmem.h"
+
+
+const unsigned char font[] PROGMEM = {
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x3E, 0x5B, 0x4F, 0x5B, 0x3E, 0x00,
+  0x3E, 0x6B, 0x4F, 0x6B, 0x3E, 0x00,
+  0x1C, 0x3E, 0x7C, 0x3E, 0x1C, 0x00,
+  0x18, 0x3C, 0x7E, 0xBC, 0x18, 0x00,
+  0x1C, 0x57, 0x7D, 0x57, 0x1C, 0x00,
+  0x1C, 0x5E, 0x7F, 0x5E, 0x1C, 0x00,
+  0x00, 0x18, 0x3C, 0x18, 0x00, 0x00,
+  0xFF, 0xE7, 0xC3, 0xE7, 0xFF, 0x00,
+  0x00, 0x18, 0x24, 0x18, 0x00, 0x00,
+  0xFF, 0xE7, 0xDB, 0xE7, 0xFF, 0x00,
+  0x30, 0x48, 0x3A, 0x06, 0x0E, 0x00,
+  0x26, 0x29, 0x79, 0x29, 0x26, 0x00,
+  0x40, 0x7F, 0x05, 0x05, 0x07, 0x00,
+  0x40, 0x7F, 0x05, 0x25, 0x3F, 0x00,
+  0x5A, 0x3C, 0x66, 0x3C, 0x5A, 0x00,
+  0x7F, 0x3E, 0x1C, 0x1C, 0x08, 0x00,
+  0x08, 0x1C, 0x1C, 0x3E, 0x7F, 0x00,
+  0x14, 0x22, 0x7F, 0x22, 0x14, 0x00,
+  0x5F, 0x5F, 0x00, 0x5F, 0x5F, 0x00,
+  0x06, 0x09, 0x7F, 0x01, 0x7F, 0x00,
+  0x00, 0x66, 0x89, 0x95, 0x6A, 0x00,
+  0x60, 0x60, 0x60, 0x60, 0x60, 0x00,
+  0x94, 0xA2, 0xFF, 0xA2, 0x94, 0x00,
+  0x08, 0x04, 0x7E, 0x04, 0x08, 0x00,
+  0x10, 0x20, 0x7E, 0x20, 0x10, 0x00,
+  0x08, 0x08, 0x2A, 0x1C, 0x08, 0x00,
+  0x08, 0x1C, 0x2A, 0x08, 0x08, 0x00,
+  0x1E, 0x10, 0x10, 0x10, 0x10, 0x00,
+  0x0C, 0x1E, 0x0C, 0x1E, 0x0C, 0x00,
+  0x30, 0x38, 0x3E, 0x38, 0x30, 0x00,
+  0x06, 0x0E, 0x3E, 0x0E, 0x06, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x5E, 0x00, 0x00, 0x00,
+  0x00, 0x06, 0x00, 0x06, 0x00, 0x00,
+  0x14, 0x3E, 0x14, 0x3E, 0x14, 0x00,
+  0x24, 0x2A, 0x7F, 0x2A, 0x12, 0x00,
+  0x26, 0x16, 0x08, 0x34, 0x32, 0x00,
+  0x36, 0x4A, 0x56, 0x20, 0x50, 0x00,
+  0x00, 0x0A, 0x06, 0x00, 0x00, 0x00,
+  0x00, 0x3C, 0x42, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x42, 0x3C, 0x00, 0x00,
+  0x14, 0x08, 0x3E, 0x08, 0x14, 0x00,
+  0x08, 0x08, 0x3E, 0x08, 0x08, 0x00,
+  0x00, 0xA0, 0x60, 0x00, 0x00, 0x00,
+  0x08, 0x08, 0x08, 0x08, 0x08, 0x00,
+  0x00, 0x00, 0x60, 0x60, 0x00, 0x00,
+  0x20, 0x10, 0x08, 0x04, 0x02, 0x00,
+  0x3E, 0x41, 0x41, 0x41, 0x3E, 0x00,
+  0x00, 0x42, 0x7F, 0x40, 0x00, 0x00,
+  0x72, 0x49, 0x49, 0x49, 0x46, 0x00,
+  0x21, 0x41, 0x45, 0x45, 0x3B, 0x00,
+  0x38, 0x26, 0x21, 0x7F, 0x20, 0x00,
+  0x2F, 0x49, 0x49, 0x49, 0x31, 0x00,
+  0x3E, 0x49, 0x49, 0x49, 0x31, 0x00,
+  0x01, 0x01, 0x61, 0x19, 0x07, 0x00,
+  0x36, 0x49, 0x49, 0x49, 0x36, 0x00,
+  0x4E, 0x51, 0x51, 0x51, 0x3E, 0x00,
+  0x00, 0x00, 0x14, 0x00, 0x00, 0x00,
+  0x00, 0x40, 0x34, 0x00, 0x00, 0x00,
+  0x00, 0x08, 0x14, 0x22, 0x00, 0x00,
+  0x14, 0x14, 0x14, 0x14, 0x14, 0x00,
+  0x00, 0x00, 0x22, 0x14, 0x08, 0x00,
+  0x00, 0x04, 0x52, 0x0A, 0x04, 0x00,
+  0x3E, 0x41, 0x5D, 0x59, 0x4E, 0x00,
+  0x7E, 0x09, 0x09, 0x09, 0x7E, 0x00,
+  0x7F, 0x49, 0x49, 0x49, 0x36, 0x00,
+  0x3E, 0x41, 0x41, 0x41, 0x22, 0x00,
+  0x7F, 0x41, 0x41, 0x41, 0x3E, 0x00,
+  0x7F, 0x49, 0x49, 0x49, 0x41, 0x00,
+  0x7F, 0x09, 0x09, 0x09, 0x01, 0x00,
+  0x3E, 0x41, 0x49, 0x49, 0x3A, 0x00,
+  0x7F, 0x08, 0x08, 0x08, 0x7F, 0x00,
+  0x00, 0x00, 0x7F, 0x00, 0x00, 0x00,
+  0x20, 0x41, 0x41, 0x3F, 0x00, 0x00,
+  0x7F, 0x08, 0x14, 0x22, 0x41, 0x00,
+  0x7F, 0x40, 0x40, 0x40, 0x40, 0x00,
+  0x7F, 0x02, 0x04, 0x02, 0x7F, 0x00,
+  0x7F, 0x02, 0x04, 0x08, 0x7F, 0x00,
+  0x3E, 0x41, 0x41, 0x41, 0x3E, 0x00,
+  0x7F, 0x09, 0x09, 0x09, 0x06, 0x00,
+  0x3E, 0x41, 0x51, 0x21, 0x5E, 0x00,
+  0x7F, 0x09, 0x19, 0x29, 0x46, 0x00,
+  0x26, 0x49, 0x49, 0x49, 0x32, 0x00,
+  0x01, 0x01, 0x7F, 0x01, 0x01, 0x00,
+  0x3F, 0x40, 0x40, 0x40, 0x3F, 0x00,
+  0x1F, 0x20, 0x40, 0x20, 0x1F, 0x00,
+  0x3F, 0x40, 0x38, 0x40, 0x3F, 0x00,
+  0x63, 0x14, 0x08, 0x14, 0x63, 0x00,
+  0x07, 0x08, 0x70, 0x08, 0x07, 0x00,
+  0x61, 0x51, 0x49, 0x45, 0x43, 0x00,
+  0x00, 0x7F, 0x41, 0x41, 0x00, 0x00,
+  0x02, 0x04, 0x08, 0x10, 0x20, 0x00,
+  0x00, 0x00, 0x41, 0x41, 0x7F, 0x00,
+  0x04, 0x02, 0x01, 0x02, 0x04, 0x00,
+  0x40, 0x40, 0x40, 0x40, 0x40, 0x00,
+  0x00, 0x00, 0x06, 0x0A, 0x00, 0x00,
+  0x20, 0x54, 0x54, 0x54, 0x78, 0x00,
+  0x7E, 0x48, 0x48, 0x48, 0x30, 0x00,
+  0x30, 0x48, 0x48, 0x48, 0x48, 0x00,
+  0x30, 0x48, 0x48, 0x48, 0x7E, 0x00,
+  0x38, 0x54, 0x54, 0x54, 0x58, 0x00,
+  0x00, 0x08, 0x7C, 0x0A, 0x00, 0x00,
+  0x98, 0xA4, 0xA4, 0xA4, 0x78, 0x00,
+  0x7E, 0x08, 0x08, 0x08, 0x70, 0x00,
+  0x00, 0x00, 0x7A, 0x00, 0x00, 0x00,
+  0x20, 0x40, 0x40, 0x3A, 0x00, 0x00,
+  0x7E, 0x10, 0x28, 0x44, 0x00, 0x00,
+  0x00, 0x00, 0x7E, 0x40, 0x00, 0x00,
+  0x7C, 0x04, 0x78, 0x04, 0x78, 0x00,
+  0x7C, 0x04, 0x04, 0x04, 0x78, 0x00,
+  0x38, 0x44, 0x44, 0x44, 0x38, 0x00,
+  0xFC, 0x24, 0x24, 0x24, 0x18, 0x00,
+  0x18, 0x24, 0x24, 0x24, 0xFC, 0x00,
+  0x7C, 0x08, 0x04, 0x04, 0x08, 0x00,
+  0x48, 0x54, 0x54, 0x54, 0x24, 0x00,
+  0x00, 0x04, 0x7E, 0x44, 0x00, 0x00,
+  0x3C, 0x40, 0x40, 0x20, 0x7C, 0x00,
+  0x1C, 0x20, 0x40, 0x20, 0x1C, 0x00,
+  0x3C, 0x40, 0x30, 0x40, 0x3C, 0x00,
+  0x44, 0x28, 0x10, 0x28, 0x44, 0x00,
+  0x5C, 0xA0, 0xA0, 0xA0, 0x7C, 0x00,
+  0x44, 0x64, 0x54, 0x4C, 0x44, 0x00,
+  0x00, 0x08, 0x36, 0x41, 0x00, 0x00,
+  0x00, 0x00, 0xFF, 0x00, 0x00, 0x00,
+  0x00, 0x41, 0x36, 0x08, 0x00, 0x00,
+  0x02, 0x01, 0x02, 0x04, 0x02, 0x00,
+  0x3C, 0x26, 0x23, 0x26, 0x3C, 0x00,
+  0x7E, 0xFF, 0x81, 0xFB, 0xF7, 0xEF,
+  0x81, 0xFF, 0xC1, 0xBF, 0xBF, 0xBF,
+  0xC1, 0xFF, 0x81, 0xFB, 0xF7, 0xFB,
+  0x81, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0xC3, 0xBD, 0xBD, 0xBD,
+  0xDB, 0xFF, 0x83, 0xED, 0xED, 0xED,
+  0x83, 0xFF, 0x81, 0xED, 0xED, 0xED,
+  0xF3, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0xE1, 0xDF, 0xBF, 0xDF,
+  0xE1, 0xFF, 0xC3, 0xBD, 0xBD, 0xBD,
+  0xC3, 0xFF, 0x81, 0xBF, 0xBF, 0xBF,
+  0xBF, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0x81, 0xB5, 0xB5, 0xB5,
+  0xCB, 0xFF, 0x81, 0xED, 0xCD, 0xAD,
+  0xB3, 0xFF, 0xFD, 0xFD, 0x81, 0xFD,
+  0xFD, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0xC3, 0xBD, 0xBD, 0xBD,
+  0xDB, 0xFF, 0x83, 0xED, 0xED, 0xED,
+  0x83, 0xFF, 0x81, 0xBF, 0xBF, 0xBF,
+  0xBF, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x08, 0x08, 0x3E,
+  0x08, 0x08, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x08, 0x08, 0x08,
+  0x08, 0x08, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x3E, 0x6F, 0x5F, 0x63,
+  0x7B, 0x7B, 0x3E, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x3E, 0x7F, 0x59, 0x6F,
+  0x77, 0x7B, 0x3E, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x14, 0x08, 0x3E,
+  0x08, 0x14, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x08, 0x08, 0x2A,
+  0x08, 0x08, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x7E, 0x04, 0x08, 0x10,
+  0x7E, 0x00, 0x3E, 0x40, 0x40, 0x40,
+  0x3E, 0x00, 0x7E, 0x04, 0x08, 0x04,
+  0x7E, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x3C, 0x42, 0x42, 0x42,
+  0x24, 0x00, 0x7C, 0x12, 0x12, 0x12,
+  0x7C, 0x00, 0x7E, 0x12, 0x12, 0x12,
+  0x0C, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0x81, 0xFB, 0xE7, 0xFB,
+  0x81, 0xFF, 0x81, 0xB5, 0xB5, 0xB5,
+  0xBD, 0xFF, 0x81, 0xBD, 0xBD, 0xBD,
+  0xC3, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0x81, 0xB5, 0xB5, 0xB5,
+  0xCB, 0xFF, 0x81, 0xEF, 0xF7, 0xEB,
+  0x9D, 0xFF, 0x81, 0xBF, 0xBF, 0xBF,
+  0xBF, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0x81, 0xED, 0xED, 0xED,
+  0xF3, 0xFF, 0x83, 0xED, 0xED, 0xED,
+  0x83, 0xFF, 0x81, 0xBD, 0xBD, 0xBD,
+  0xC3, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x3E, 0x77, 0x6F, 0x77,
+  0x7B, 0x77, 0x3E, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x08, 0x10, 0x08,
+  0x04, 0x08, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x3E, 0x77, 0x77, 0x55,
+  0x77, 0x77, 0x3E, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0xB3, 0xAD, 0xAD, 0xAD,
+  0xDB, 0xFF, 0xC3, 0xBD, 0xBD, 0xBD,
+  0xDB, 0xFF, 0x81, 0xED, 0xCD, 0xAD,
+  0xB3, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x10, 0x20, 0x1C,
+  0x04, 0x04, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x3C, 0x42, 0x42, 0x42,
+  0x24, 0x00, 0x7C, 0x12, 0x12, 0x12,
+  0x7C, 0x00, 0x7E, 0x40, 0x40, 0x40,
+  0x40, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x7E, 0x12, 0x12, 0x12,
+  0x0C, 0x00, 0x7C, 0x12, 0x12, 0x12,
+  0x7C, 0x00, 0x7E, 0x42, 0x42, 0x42,
+  0x3C, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0xC3, 0xBD, 0xBD, 0xBD,
+  0xC3, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0xFF, 0xBB, 0x81, 0xBF,
+  0xFF, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0x9B, 0xAD, 0xAD, 0xAD,
+  0xB3, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0xDD, 0xBD, 0xB5, 0xB5,
+  0xC9, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0xE7, 0xEB, 0xED, 0x81,
+  0xFF, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x7E, 0xFF, 0xD1, 0xB5, 0xB5, 0xB5,
+  0xCD, 0xFF, 0x7E, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x3E, 0x77, 0x77, 0x41,
+  0x77, 0x77, 0x3E, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x3E, 0x77, 0x77, 0x77,
+  0x77, 0x77, 0x3E, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x3E, 0x6B, 0x77, 0x41,
+  0x77, 0x6B, 0x3E, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x4C, 0x52, 0x52, 0x52,
+  0x24, 0x00, 0x3C, 0x42, 0x42, 0x42,
+  0x24, 0x00, 0x7E, 0x12, 0x32, 0x52,
+  0x4C, 0x00, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x26, 0x10,
+  0x08, 0x04, 0x00, 0x00, 0x00, 0x00,
+};

@@ 0,0 1,268 @@
+/*
+Copyright 2021 gregorio
+
+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/>.
+*/
+
+#include QMK_KEYBOARD_H
+#include "./lib/oled.h"
+
+bool process_record_user_oled(uint16_t keycode, keyrecord_t *record) {
+    return process_record_user(keycode, record);
+}
+
+void change_oled_mode(void) {
+    oled_mode = (oled_mode + 1) % _NUM_OLED_MODES;
+}
+
+void render_layer_section(void) {
+    // Layer indicators
+    static const char PROGMEM layer_0[] = {0xc8, 0xc9, 0};
+    static const char PROGMEM layer_1[] = {0xca, 0xcb, 0};
+    static const char PROGMEM layer_2[] = {0xcc, 0xcd, 0};
+    static const char PROGMEM layer_3[] = {0xce, 0xcf, 0};
+
+    oled_set_cursor(oled_max_chars()-15, 0);
+    oled_write_P(PSTR("LAYER"), false);
+    switch (get_highest_layer(layer_state)) {
+        case 0:
+            oled_write_P(layer_0, false);
+            break;
+        case 1:
+            oled_write_P(layer_1, false);
+            break;
+        case 2:
+            oled_write_P(layer_2, false);
+            break;
+        case 3:
+            oled_write_P(layer_3, false);
+            break;
+        default:
+            oled_write_P(PSTR("? "), false);
+            break;
+    }
+}
+
+void render_encoder_section(void) {
+    static const char PROGMEM enc_vol[] = {0x88, 0x89, 0x8a, 0x8b, 0};
+    static const char PROGMEM enc_med[] = {0xa8, 0xa9, 0xaa, 0xab, 0};
+    static const char PROGMEM enc_brt[] = {0x8c, 0x8d, 0x8e, 0x8f, 0};
+
+    oled_set_cursor(oled_max_chars()-7, 0);
+    oled_write_P(PSTR("ENC"), false);
+    switch (encoder_mode) {
+        default:
+        case ENC_MODE_VOLUME:
+            oled_write_P(enc_vol, false);
+            break;
+        case ENC_MODE_MEDIA:
+            oled_write_P(enc_med, false);
+            break;
+        case ENC_MODE_BRIGHTNESS:
+            oled_write_P(enc_brt, false);
+            break;
+    }
+}
+
+void render_numlock_section(void) {
+    static const char PROGMEM num_on[] = {0x80, 0x81, 0x82, 0x83, 0};
+    static const char PROGMEM num_off[] = {0xa0, 0xa1, 0xa2, 0xa3, 0};
+    static const char PROGMEM cap_on[] = {0x84, 0x85, 0x86, 0x87, 0};
+    static const char PROGMEM cap_off[] = {0xa4, 0xa5, 0xa6, 0xa7, 0};
+    static const char PROGMEM scr_on[] = {0xba, 0xbb, 0xbc, 0xbd, 0};
+    static const char PROGMEM scr_off[] = {0xda, 0xdb, 0xdc, 0xdd, 0};
+
+    led_t led_state = host_keyboard_led_state();
+
+    oled_set_cursor(oled_max_chars()-12, 3);
+    // num lock
+    oled_write_P(led_state.num_lock ? num_on : num_off, false);
+    oled_write_P(led_state.caps_lock ? cap_on : cap_off, false);
+    oled_write_P(led_state.scroll_lock ? scr_on : scr_off, false);
+}
+
+void render_mode_section(void) {
+    static const char PROGMEM pad_on[] = {0xb0, 0xb1, 0xb2, 0xb3, 0};
+    static const char PROGMEM pad_off[] = {0xc4, 0xc5, 0xc6, 0xc7, 0};
+    static const char PROGMEM cal_on[] = {0x90, 0x91, 0x92, 0x93, 0};
+    static const char PROGMEM cal_off[] = {0xc0, 0xc1, 0xc2, 0xc3, 0};
+
+    if (oled_mode == OLED_MODE_CALC) {
+        oled_set_cursor(0, 0);
+        oled_write_P(pad_off, false);
+        oled_set_cursor(0, 1);
+        oled_write_P(cal_on, false);
+    } else {
+        oled_set_cursor(0, 0);
+        oled_write_P(pad_on, false);
+        oled_set_cursor(0, 1);
+        oled_write_P(cal_off, false);
+    }
+}
+
+void render_calc_section(void) {
+    static const char PROGMEM add_on[] = {0xd4, 0xd5, 0};
+    static const char PROGMEM add_off[] = {0x94, 0x95, 0};
+    static const char PROGMEM sub_on[] = {0xd6, 0xd7, 0};
+    static const char PROGMEM sub_off[] = {0x96, 0x97, 0};
+    static const char PROGMEM mul_on[] = {0xd8, 0xd9, 0};
+    static const char PROGMEM mul_off[] = {0x9c, 0x9d, 0};
+    static const char PROGMEM div_on[] = {0xb8, 0xb9, 0};
+    static const char PROGMEM div_off[] = {0x9e, 0x9f, 0};
+    static const char PROGMEM sqr_on[] = {0x98, 0x99, 0};
+    static const char PROGMEM sqr_off[] = {0xbe, 0xbf, 0};
+    static const char PROGMEM rec_on[] = {0x9a, 0x9b, 0};
+    static const char PROGMEM rec_off[] = {0xde, 0xdf, 0};
+    static const char PROGMEM neg_on[] = {0xb4, 0xb5, 0};
+    static const char PROGMEM neg_off[] = {0xb6, 0xb7, 0};
+
+
+    if (oled_mode == OLED_MODE_CALC) {
+        if (get_highest_layer(layer_state) == 1) {
+            oled_set_cursor(oled_max_chars()-8, 0);
+
+            switch (calc_operator_display) {
+                case '+':
+                    oled_write_P(div_off, false);
+                    oled_write_P(mul_off, false);
+                    oled_write_P(sub_off, false);
+                    oled_write_P(add_on, false);
+                    break;
+                case '-':
+                    oled_write_P(div_off, false);
+                    oled_write_P(mul_off, false);
+                    oled_write_P(sub_on, false);
+                    oled_write_P(add_off, false);
+                    break;
+                case '*':
+                    oled_write_P(div_off, false);
+                    oled_write_P(mul_on, false);
+                    oled_write_P(sub_off, false);
+                    oled_write_P(add_off, false);
+                    break;
+                case '/':
+                    oled_write_P(div_on, false);
+                    oled_write_P(mul_off, false);
+                    oled_write_P(sub_off, false);
+                    oled_write_P(add_off, false);
+                    break;
+                case 's':
+                case 'r':
+                case 'n':
+                    layer_on(2);
+                    break;
+                default:
+                    oled_write_P(div_off, false);
+                    oled_write_P(mul_off, false);
+                    oled_write_P(sub_off, false);
+                    oled_write_P(add_off, false);
+                    break;
+            }
+        } else if (get_highest_layer(layer_state) == 2) {
+            oled_set_cursor(oled_max_chars()-6, 0);
+
+            switch (calc_operator_display) {
+                case '+':
+                case '-':
+                case '*':
+                case '/':
+                    layer_off(2);
+                    break;
+                case 's':
+                    oled_write_P(neg_off, false);
+                    oled_write_P(sqr_on, false);
+                    oled_write_P(rec_off, false);
+                    break;
+                case 'r':
+                    oled_write_P(neg_off, false);
+                    oled_write_P(sqr_off, false);
+                    oled_write_P(rec_on, false);
+                    break;
+                case 'n':
+                    oled_write_P(neg_on, false);
+                    oled_write_P(sqr_off, false);
+                    oled_write_P(rec_off, false);
+                    break;
+                default:
+                    oled_write_P(neg_off, false);
+                    oled_write_P(sqr_off, false);
+                    oled_write_P(rec_off, false);
+                    break;
+            }
+        }
+
+        if (calc_display_lines == 1) {
+            oled_set_cursor(oled_max_chars()-strlen(calc_result_display)-2, 3);
+            oled_write_char(calc_operator_display, false);
+        } else if (calc_display_lines == 2) {
+            oled_set_cursor(oled_max_chars()-strlen(calc_status_display), 2);
+            oled_write(calc_status_display, false);
+        }
+        oled_set_cursor(oled_max_chars()-strlen(calc_result_display), 3);
+        oled_write(calc_result_display, false);
+    }
+}
+
+static void render_logo(void) {
+    oled_write_raw_P(raw_logo, sizeof(raw_logo));
+}
+
+void render_frame(void) {
+    if (oled_logo_expired) {
+        if (oled_mode == OLED_MODE_DEFAULT) {
+            render_mode_section();
+            render_layer_section();
+            render_encoder_section();
+            render_numlock_section();
+        } else if (oled_mode == OLED_MODE_CALC) {
+            render_mode_section();
+            render_calc_section();
+        } else if (oled_mode == OLED_MODE_OFF) {
+            if (is_oled_on()) {
+                oled_off();
+            }
+        }
+    } else {
+        render_logo();
+        oled_logo_expired = timer_elapsed(oled_logo_timer) > OLED_LOGO_TIMEOUT;
+    }
+}
+
+__attribute__((weak)) void oled_task_user(void) {
+    if (timer_elapsed(oled_frame_timer) > OLED_FRAME_TIMEOUT) {
+        oled_clear();
+        oled_frame_timer = timer_read();
+        render_frame();
+    }
+
+    if (get_highest_layer(layer_state) == 1) {
+        oled_mode = OLED_MODE_CALC;
+    } else if (get_highest_layer(layer_state) == 2) {
+        if (IS_LAYER_ON(1)) {
+            oled_mode = OLED_MODE_CALC;
+        } else {
+            oled_mode = OLED_MODE_DEFAULT;
+        }
+    } else if (get_highest_layer(layer_state) == 3) {
+        oled_mode = OLED_MODE_OFF;
+    } else {
+        oled_mode = OLED_MODE_DEFAULT;
+    }
+}
+
+oled_rotation_t oled_init_user(oled_rotation_t rotation) {
+    oled_logo_timer = timer_read();
+    oled_frame_timer = timer_read();
+    return rotation;
+}

@@ 0,0 1,32 @@
+/*
+Copyright 2021 gregorio
+
+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 OLED_FRAME_TIMEOUT (1000 / 30)  // 30 fps
+#define OLED_LOGO_TIMEOUT 3000          // 3 sec
+
+static uint16_t oled_frame_timer = 0;
+static uint16_t oled_logo_timer = 0;
+static bool oled_logo_expired = false;
+
+static const char PROGMEM raw_logo[] = {
+                                        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,128,128,128,128,128,128,  0,  0,  0,  0,  0,  0,  0,128,128,128,128,128,128,128,128,128,128,128,  0,  0,  0,  0,  0,  0,128,128,128,128,  0,  0,  0,  0,  0,  0,128,128,128,128,  0,  0,128,128,128,128,128,128,128,128,128,128,128,  0,  0,  0,  0,  0,128,128,128,128,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+                                        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,128,224,112,184,220,204,182,123,254,251,187,223,231,203,126,254,  0,  0,  0,  0,  0,  0,255,  0,  0,  0,248,  8,  8,  8,  8,  8,249,225,  2, 12,248,  0,  0,255,255,255,255,  0,  0,  0,  0,  0,  0,255,255,255,255,  0,  0,255,255,255,255,199,199,199,199,199,207,255,255,254,124,  0,  0,255,255,255,255,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+                                        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,127,191,188,211,223,223,247,187,187,252,126,123,247,239,223,190,115,142,  0,  0,  0,  0,  0,255,  0,  0,  0,227, 34, 34, 34, 98,194,  1, 56,236,135,  1,  0,  0, 31, 63,127,255,248,240,240,240,240,248,255,127, 63, 31,  0,  0,255,255,255,255,227,227,227,227,227,243,255,255,127, 62,  0,  0,255,255,255,255,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+                                        0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  0,  0,  0,  1,  1,  0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  0,  0,  0,  0,  1,  1,  1,  1,  1,  0,  0,  0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  0,  0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  0,  0,  0,  0,  0,  1,  1,  1,  1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
+};

@@ 0,0 1,23 @@
+# Rubi
+
+![Rubi](https://i.imgur.com/XUzxe0rh.jpg)
+
+[Proto Album](https://imgur.com/a/QVtU7hV)
+
+A 4x5 layout numpad with rotary encoder, LED indicator and OLED screen, featuring a basic calculator inside the OLED screen. The PCB supports both hotswap and solderable switch. Currently the PCB and case can only be purchased in Indonesia.
+
+* Keyboard Maintainer: [ohchiko](https://github.com/ohchiko)
+* Hardware Supported: Rubi PCB Rev. A, ATMega32u4
+* Hardware Availability: Local Indonesia GB.
+
+Make example for this keyboard (after setting up your build environment):
+
+    make rubi:default
+
+Flashing example for this keyboard:
+
+    make rubi:default:flash
+
+To put this keyboard into bootloader mode (for flashing firmware), simply activate layer 3 and press the middle key (key "5" on the proto picture) on the default keymap.
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).

@@ 0,0 1,108 @@
+/* Copyright 2021 gregorio
+ *
+ * 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/>.
+ */
+#include "rubi.h"
+
+uint8_t oled_mode = OLED_MODE_DEFAULT;
+
+char calc_result_display[CALC_DIGITS+1] = "";
+char calc_operator_display = ' ';
+char calc_status_display[CALC_DIGITS+1] = "";
+uint8_t calc_display_lines = 2;
+
+const char keycode_to_ascii_lut[58] = {0, 0, 0, 0, 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', 0, 0, 0, '\t', ' ', '-', '=', '[', ']', '\\', 0, ';', '\'', '`', ',', '.', '/'};
+
+uint8_t encoder_mode = ENC_MODE_VOLUME;
+
+bool process_record_kb(uint16_t keycode, keyrecord_t *record) {
+    if (keycode < 58 && keycode != KC_TAB) {
+        if (record->event.pressed) {
+            calcInput(keycode_to_ascii_lut[(uint8_t)keycode]);
+        }
+        return false;
+    }
+    switch (keycode) {
+        case ENC_PRESS:
+            if (record->event.pressed) {
+                uint16_t mapped_code = handle_encoder_press();
+                if (mapped_code != 0) {
+                    tap_code16(mapped_code);
+                }
+            }
+            return false;
+        case CL_PLUS:
+            if (record->event.pressed) {
+                calcInput('+');
+            }
+            return false;
+        case CL_STAR:
+            if (record->event.pressed) {
+                calcInput('*');
+            }
+            return false;
+        case CL_TYPE:
+            if (record->event.pressed) {
+                send_string(calc_result_display);
+            }
+            return false;
+        default:
+            break;
+    }
+
+    return process_record_user_oled(keycode, record);
+}
+
+
+bool led_update_kb(led_t led_state) {
+    bool res = led_update_user(led_state);
+    if (res) {
+        writePin(C6, led_state.num_lock);
+    }
+    return true;
+}
+
+__attribute__ ((weak)) void encoder_update_user(uint8_t index, bool clockwise) {
+    if (index == 0) {
+        if (get_highest_layer(layer_state) == 0) {
+            uint16_t mapped_code = 0;
+            if (clockwise) {
+                mapped_code = handle_encoder_cw();
+            } else {
+                mapped_code = handle_encoder_ccw();
+            }
+            if (mapped_code != 0) {
+                tap_code16(mapped_code);
+            }
+        } else {
+            if (clockwise) {
+                if (oled_mode == OLED_MODE_CALC) {
+                    handle_encoder_cw();
+                } else if (oled_mode == OLED_MODE_DEFAULT) {
+                    change_encoder_mode(false);
+                }
+            } else {
+                if (oled_mode == OLED_MODE_CALC) {
+                    handle_encoder_ccw();
+                } else if (oled_mode == OLED_MODE_DEFAULT) {
+                    change_encoder_mode(true);
+                }
+            }
+        }
+    }
+}
+
+void encoder_update_kb(uint8_t index, bool clockwise) {
+    encoder_update_user(index, clockwise);
+}

@@ 0,0 1,102 @@
+/* Copyright 2021 gregorio
+ *
+ * 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
+
+#include "quantum.h"
+
+#define CALC_DIGITS 12
+
+enum rubi_keycodes {
+    ENC_PRESS = SAFE_RANGE,
+    CL_PLUS,
+    CL_STAR,
+    CL_TYPE,
+    NEW_SAFE_RANGE
+};
+
+enum oled_modes {
+    OLED_MODE_DEFAULT,
+    OLED_MODE_CALC,
+    OLED_MODE_OFF,
+    _NUM_OLED_MODES
+};
+
+enum encoder_modes {
+    ENC_MODE_VOLUME,
+    ENC_MODE_MEDIA,
+    ENC_MODE_BRIGHTNESS,
+    _NUM_ENCODER_MODES
+};
+
+extern uint8_t current_layer;
+extern uint8_t oled_mode;
+extern uint8_t encoder_mode;
+
+extern char calc_result_display[CALC_DIGITS+1];
+extern char calc_operator_display;
+extern char calc_status_display[CALC_DIGITS+1];
+extern uint8_t calc_display_lines;
+
+bool process_record_user_oled(uint16_t keycode, keyrecord_t *record);
+void change_oled_mode(void);
+
+void change_encoder_mode(bool reverse);
+uint16_t handle_encoder_cw(void);
+uint16_t handle_encoder_ccw(void);
+uint16_t handle_encoder_press(void);
+
+void calcUpdate(void);
+void calcInput(char input);
+void calcOperands(void);
+
+/* This is a shortcut to help you visually see your layout.
+ *
+ * The first section contains all of the arguments representing the physical
+ * layout of the board and position of the keys.
+ *
+ * The second converts the arguments into a two-dimensional array which
+ * represents the switch matrix.
+ */
+
+/* Rubi matrix layout
+ * ,---------------.
+ * |             23|
+ * |---------------|
+ * | 00| 01| 02| 03|
+ * |---------------|
+ * | 10| 11| 12|   |
+ * |-----------| 13|
+ * | 20| 21| 22|   |
+ * |---------------|
+ * | 30| 31| 32|   |
+ * |-----------| 33|
+ * |   41  | 42|   |
+ * `---------------'
+ */
+#define LAYOUT( \
+                       k23, \
+        k00, k01, k02, k03, \
+        k10, k11, k12, k13, \
+        k20, k21, k22, \
+        k30, k31, k32, k33, \
+             k41, k42 \
+) { \
+    { k00,   k01, k02, k03   }, \
+    { k10,   k11, k12, k13   }, \
+    { k20,   k21, k22, k23   }, \
+    { k30,   k31, k32, k33   }, \
+    { KC_NO, k41, k42, KC_NO }  \
+}

@@ 0,0 1,28 @@
+# MCU name
+MCU = atmega32u4
+
+# Bootloader selection
+BOOTLOADER = atmel-dfu
+
+# Build Options
+#   change yes to no to disable
+#
+BOOTMAGIC_ENABLE = no       # Virtual DIP switch configuration
+MOUSEKEY_ENABLE = no        # Mouse keys
+EXTRAKEY_ENABLE = yes       # Audio control and System control
+CONSOLE_ENABLE = no         # Console for debug
+COMMAND_ENABLE = no         # Commands for debug and configuration
+# Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
+SLEEP_LED_ENABLE = no       # Breathing sleep LED during USB suspend
+# if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
+NKRO_ENABLE = yes           # USB Nkey Rollover
+BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
+RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+BLUETOOTH_ENABLE = no       # Enable Bluetooth
+AUDIO_ENABLE = no           # Audio output
+OLED_DRIVER_ENABLE = yes
+ENCODER_ENABLE = yes
+
+SRC += lib/oled.c \
+	   lib/encoder.c \
+	   lib/calc.c