mirror of https://github.com/qmk/qmk_firmware
98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
/*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "util.h"
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/*
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* The WS2812 datasheets define T1H 900ns, T0H 350ns, T1L 350ns, T0L 900ns. Hence, by default, these
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* are chosen to be conservative and avoid problems rather than for maximum throughput; in the code,
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* this is done by default using a WS2812_TIMING parameter that accounts for the whole window (1250ns)
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* and defining T1H and T0H; T1L and T0L are obtained by subtracting their low counterparts from the window.
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*
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* However, there are certain "WS2812"-like LEDs, like the SK6812s, which work in a similar
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* communication topology but use different timings for the window and the T1L, T1H, T0L and T0H.
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* This means that, albeit the same driver being applicable, the timings must be adapted.
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*/
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#ifndef WS2812_TIMING
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# define WS2812_TIMING 1250
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#endif
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#ifndef WS2812_T1H
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# define WS2812_T1H 900 // Width of a 1 bit in ns
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#endif
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#ifndef WS2812_T1L
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# define WS2812_T1L (WS2812_TIMING - WS2812_T1H) // Width of a 1 bit in ns
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#endif
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#ifndef WS2812_T0H
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# define WS2812_T0H 350 // Width of a 0 bit in ns
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#endif
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#ifndef WS2812_T0L
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# define WS2812_T0L (WS2812_TIMING - WS2812_T0H) // Width of a 0 bit in ns
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#endif
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/*
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* Older WS2812s can handle a reset time (TRST) of 50us, but recent
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* component revisions require a minimum of 280us.
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*/
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#if !defined(WS2812_TRST_US)
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# define WS2812_TRST_US 280
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#endif
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#if defined(RGBLIGHT_WS2812)
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# define WS2812_LED_COUNT RGBLIGHT_LED_COUNT
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#elif defined(RGB_MATRIX_WS2812)
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# define WS2812_LED_COUNT RGB_MATRIX_LED_COUNT
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#endif
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#define WS2812_BYTE_ORDER_RGB 0
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#define WS2812_BYTE_ORDER_GRB 1
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#define WS2812_BYTE_ORDER_BGR 2
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#ifndef WS2812_BYTE_ORDER
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# define WS2812_BYTE_ORDER WS2812_BYTE_ORDER_GRB
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#endif
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typedef struct PACKED ws2812_led_t {
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#if (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_GRB)
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uint8_t g;
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uint8_t r;
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uint8_t b;
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#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_RGB)
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uint8_t r;
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uint8_t g;
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uint8_t b;
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#elif (WS2812_BYTE_ORDER == WS2812_BYTE_ORDER_BGR)
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uint8_t b;
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uint8_t g;
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uint8_t r;
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#endif
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#ifdef WS2812_RGBW
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uint8_t w;
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#endif
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} ws2812_led_t;
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void ws2812_init(void);
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void ws2812_set_color(int index, uint8_t red, uint8_t green, uint8_t blue);
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void ws2812_set_color_all(uint8_t red, uint8_t green, uint8_t blue);
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void ws2812_flush(void);
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void ws2812_rgb_to_rgbw(ws2812_led_t *led);
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