WS2812 Overhaul (#210)

* ARM - ws2812 bitbang (#7173)

* Initial ARM bitbang ws2812 driver

* Unify chibios platform to run rgblight_task

* Remove 'avr only' comments from ws2812 docs

* Remove 'avr only' comments from ws2812 docs

* Unify chibios platform to run rgblight_task - review comments

* Remove debug flags from keymap

* Add comments from review

* Add defines for STM32L0XX

* Attempt to get arm ws2812 working on multiple gcc versions

* Support RGBLIGHT_SLEEP when ChibiOS boards suspend (#7280)

Copypasta from the AVR suspend implementation with a Teensy-specific
hack removed

* Unify RGB and RGBW commands (#7297)

* Fix unicode in comments

Co-Authored-By: fauxpark <fauxpark@gmail.com>

* Remove separate RGBW implementation for a unified function

* Set White to 0 in RGBW LEDs

This is just to get this working, later, proper brightness can be handled elsewhere.

* Use us instead of nanoseconds(?) since it renders correctly on web

* Remove RGBW function from arm/ws2812.h

* Remove RGBW function from arm/ws2812.c

* Formatting changes

* Add doc info

* Remove force of debug on within rgblight - causes lockups waiting for hid_listen (#7330)

* Move Ergodox EZ RGB Light code to custom driver  (#7309)

* Move Ergodox EZ RGB code to custom driver

Also implements full addressing of Ergodox EZ's LED Strip, as written by seebs
Co-authored-by: Seebs <seebs@seebs.net>

* Make Clipping range accessible for custom drivers

* Remove RGBW_BB_TWI from driver and docs

* Revert changes to clipping range support

* Use just rgblight_set instead of full custom driver

* Convert to i2c_master commands

* Rename rgblight driver and clean up includes

* Use White channel on RGBW LEDs

* SPI DMA based RGB Underglow for STM32 (#7674)

* Initial stash of ws2812 spi driver

* Update comment, add sync backup plan

* Add testing notes to spi ws2812 driver

* Align RGBW error messages

Co-authored-by: Joel Challis <git@zvecr.com>
Co-authored-by: Jonathan Rascher <jon@bcat.name>
Co-authored-by: Florian Didron <fdidron@users.noreply.github.com>

keyboards/ergodox_ez/led_i2c.c

@@ -0,0 +1,91 @@
+/*
+ * light weight WS2812 lib V2.0b
+ *
+ * Controls WS2811/WS2812/WS2812B RGB-LEDs
+ * Author: Tim (cpldcpu@gmail.com)
+ *
+ * Jan 18th, 2014  v2.0b Initial Version
+ * Nov 29th, 2015  v2.3  Added SK6812RGBW support
+ *
+ * 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/>.
+ */
+#ifdef RGBLIGHT_ENABLE
+
+#    include "ws2812.c"
+#    include "ergodox_ez.h"
+
+extern rgblight_config_t rgblight_config;
+
+/*
+ * Forward declare internal functions
+ *
+ * The functions take a byte-array and send to the data output as WS2812 bitstream.
+ * The length is the number of bytes to send - three per LED.
+ */
+
+void ws2812_sendarray(uint8_t *array, uint16_t length);
+void ws2812_sendarray_mask(uint8_t *array, uint16_t length, uint8_t pinmask);
+
+
+
+
+void rgblight_set(void) {
+    if (!rgblight_config.enable) {
+        for (uint8_t i = 0; i < RGBLED_NUM; i++) {
+            led[i].r = 0;
+            led[i].g = 0;
+            led[i].b = 0;
+#ifdef RGBW
+            led[i].w = 0;
+#endif
+        }
+    }
+
+#ifdef RGBW
+    for (uint8_t i = 0; i < RGBLED_NUM; i++) {
+        convert_rgb_to_rgbw(&led[i]);
+    }
+#endif
+
+    uint8_t led_num = RGBLED_NUM;
+    i2c_init();
+    i2c_start(0x84, ERGODOX_EZ_I2C_TIMEOUT);
+    int i = 0;
+#    if defined(ERGODOX_LED_30)
+    // prevent right-half code from trying to bitbang all 30
+    // so with 30 LEDs, we count from 29 to 15 here, and the
+    // other half does 0 to 14.
+    led_num = RGBLED_NUM / 2;
+    for (i = led_num + led_num - 1; i >= led_num; --i)
+#    elif defined(ERGODOX_LED_15_MIRROR)
+    for (i = 0; i < led_num; ++i)
+#    else  // ERGDOX_LED_15 non-mirrored
+    for (i = led_num - 1; i >= 0; --i)
+#    endif
+    {
+        uint8_t *data = (uint8_t *)(led + i);
+        i2c_write(*data++, ERGODOX_EZ_I2C_TIMEOUT);
+        i2c_write(*data++, ERGODOX_EZ_I2C_TIMEOUT);
+        i2c_write(*data++, ERGODOX_EZ_I2C_TIMEOUT);
+#ifdef RGBW
+        i2c_write(*data++, ERGODOX_EZ_I2C_TIMEOUT);
+#endif
+    }
+    i2c_stop();
+
+    ws2812_setleds(led, RGBLED_NUM);
+}
+
+
+#endif  // RGBLIGHT_ENABLE