/* * 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);