1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
/*
* 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);
|
