Further readme updates for zmk tidbit ; prep work for oled/lvgl based on corne code

zmk/app/boards/shields/tidbit/Kconfig.defconfig

@@ -7,3 +7,39 @@ config ZMK_KEYBOARD_NAME
 	default "tidbit"
 
 endif
+
+if ZMK_DISPLAY
+
+config I2C
+	default y
+
+config SSD1306
+	default y
+
+config SSD1306_REVERSE_MODE
+	default y
+
+endif # ZMK_DISPLAY
+
+if LVGL
+
+config LVGL_HOR_RES
+	default 128
+
+config LVGL_VER_RES
+	default 32
+
+config LVGL_VDB_SIZE
+	default 64
+
+config LVGL_DPI
+	default 148
+
+config LVGL_BITS_PER_PIXEL
+	default 1
+
+choice LVGL_COLOR_DEPTH
+	default LVGL_COLOR_DEPTH_1
+endchoice
+
+endif # LVGL

zmk/app/boards/shields/tidbit/README.md

@@ -1,3 +1,68 @@
+# Building ZMK for the Tidbit
+
+Some general notes/commands for building standard Tidbit layouts from the assembly documentation.
+
+## Standard "Non Dense" Build
+
+```
+
 west build -p --board nice_nano -d build/tidbit/default -- -DSHIELD=tidbit
 
+```
+
+## Dense "19 keys" Build
+
+```
+
 west build -p --board nice_nano -d build/tidbit/19_keys -- -DSHIELD=tidbit -DKEYMAP_FILE=${PWD}/boards/shields/tidbit/tidbit_19key.keymap
+
+```
+
+## Underglow / LEDs
+
+If you built your tidbit without the underglow leds, you'll need to add the following to one of the above commands.
+
+```
+
+-DCONFIG_ZMK_RGB_UNDERGLOW=n -DCONFIG_WS2812_STRIP=n
+
+```
+
+## Encoder Notes
+
+If you built your tidbit without encoders, you'll need to add the following to one of the above commands.
+
+```
+
+-DCONFIG_EC11=n -DCONFIG_EC11_TRIGGER_GLOBAL_THREAD=n
+
+```
+
+## OLED Builds
+
+If using an OLED screen you'll need to include the following at the *end* of one of the above commands to build support for the OLED into the firmware.
+
+```
+-DZMK_DISPLAY=yes
+
+```
+
+You'll also need to add the following to your keymap file.
+
+```
+
+&pro_micro_i2c {
+	status = "okay";
+};
+
+```
+
+## Graphcs Library
+
+If you'd like to use ```lvgl``` with an OLED please append *BOTH* the above OLED parameter and the below to one of the above commands.
+
+```
+
+-DLVGL=yes
+
+```

zmk/app/boards/shields/tidbit/tidbit.dtsi

@@ -95,3 +95,23 @@
 		zmk,underglow = &led_strip;
 	};
 };
+
+&pro_micro_i2c {
+	status = "disabled";
+
+	oled: ssd1306@3c {
+		compatible = "solomon,ssd1306fb";
+		reg = <0x3c>;
+		label = "DISPLAY";
+		width = <128>;
+		height = <32>;
+		segment-offset = <0>;
+		page-offset = <0>;
+		display-offset = <0>;
+		multiplex-ratio = <31>;
+		segment-remap;
+		com-invdir;
+		com-sequential;
+		prechargep = <0x22>;
+	};
+};