- /*
- * 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/color.h"
-
- /*
- * The WS2812 datasheets define T1H 900ns, T0H 350ns, T1L 350ns, T0L 900ns. Hence, by default, these
- * are chosen to be conservative and avoid problems rather than for maximum throughput; in the code,
- * this is done by default using a WS2812_TIMING parameter that accounts for the whole window (1250ns)
- * and defining T1H and T0H; T1L and T0L are obtained by subtracting their low counterparts from the window.
- *
- * However, there are certain "WS2812"-like LEDs, like the SK6812s, which work in a similar
- * communication topology but use different timings for the window and the T1L, T1H, T0L and T0H.
- * This means that, albeit the same driver being applicable, the timings must be adapted.
- */
-
- #ifndef WS2812_TIMING
- # define WS2812_TIMING 1250
- #endif
-
- #ifndef WS2812_T1H
- # define WS2812_T1H 900 // Width of a 1 bit in ns
- #endif
-
- #ifndef WS2812_T1L
- # define WS2812_T1L (WS2812_TIMING - WS2812_T1H) // Width of a 1 bit in ns
- #endif
-
- #ifndef WS2812_T0H
- # define WS2812_T0H 350 // Width of a 0 bit in ns
- #endif
-
- #ifndef WS2812_T0L
- # define WS2812_T0L (WS2812_TIMING - WS2812_T0H) // Width of a 0 bit in ns
- #endif
-
- /*
- * Older WS2812s can handle a reset time (TRST) of 50us, but recent
- * component revisions require a minimum of 280us.
- */
- #if !defined(WS2812_TRST_US)
- # define WS2812_TRST_US 280
- #endif
-
- /* User Interface
- *
- * Input:
- * ledarray: An array of GRB data describing the LED colors
- * number_of_leds: The number of LEDs to write
- *
- * The functions will perform the following actions:
- * - Set the data-out pin as output
- * - Send out the LED data
- * - Wait 50us to reset the LEDs
- */
- void ws2812_setleds(LED_TYPE *ledarray, uint16_t number_of_leds);
|