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
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
|
.. SPDX-License-Identifier: GPL-2.0
=================================================
Kernel driver for AW20036/AW20054/AW20072/AW20108
=================================================
Description
-----------
The AW20036/AW20054/AW20072/AW20108 is a 3x12/6x9/6x12/9x12 matrix LED driver
programmed via an I2C interface. The brightness of each LED is independently
controlled by FADE and DIM parameter.
Three integrated pattern controllers provide auto breathing or group dimming
control. Each pattern controller can work in auto breathing or manual control
mode. All breathing parameters including rising/falling slope, on/off time,
repeat times, min/max brightness and so on are configurable.
Device attribute
-----------------------------------
**/sys/class/leds/<led>/dim** - 64-level DIM current. If write negative value
or "auto", the dim will be calculated according to the brightness.
The configuration files for each pattern are located::
/sys/bus/i2c/devices/xxxx/pattern0/
/sys/bus/i2c/devices/xxxx/pattern1/
/sys/bus/i2c/devices/xxxx/pattern2/
Directory layout example for pattern
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::
$ ls -l /sys/bus/i2c/devices/xxxx/pattern0/
-rw-r--r-- 1 root root 4096 Jan 1 00:00 clear_leds
-rw-r--r-- 1 root root 4096 Jan 1 00:00 fall_time
-rw-r--r-- 1 root root 4096 Jan 1 00:00 loop_begin
-rw-r--r-- 1 root root 4096 Jan 1 00:00 loop_end_on
-rw-r--r-- 1 root root 4096 Jan 1 00:00 max_breathing_level
-rw-r--r-- 1 root root 4096 Jan 1 00:00 min_breathing_level
-rw-r--r-- 1 root root 4096 Jan 1 00:00 mode
-rw-r--r-- 1 root root 4096 Jan 1 00:00 off_time
-rw-r--r-- 1 root root 4096 Jan 1 00:00 on_time
-rw-r--r-- 1 root root 4096 Jan 1 00:00 ramp
-rw-r--r-- 1 root root 4096 Jan 1 00:00 repeat
-rw-r--r-- 1 root root 4096 Jan 1 00:00 rise_time
-r--r--r-- 1 root root 4096 Jan 1 00:00 running
-rw-r--r-- 1 root root 4096 Jan 1 00:00 select_leds
-rw-r--r-- 1 root root 4096 Jan 1 00:00 start
-rw-r--r-- 1 root root 4096 Jan 1 00:00 toggle
Timing parameters
~~~~~~~~~~~~~~~~~
- **on_time**
- **rise_time**
- **fall_time**
- **off_time**
See :ref:`auto_breath_mode`.
Select from predefined times:
.. flat-table::
* - Value
- Time (in seconds)
- Value
- Time (in seconds)
* - 0
- 0.00
- 8
- 2.1
* - 1
- 0.13
- 9
- 2.6
* - 2
- 0.26
- 10
- 3.1
* - 3
- 0.38
- 11
- 4.2
* - 4
- 0.51
- 12
- 5.2
* - 5
- 0.77
- 13
- 6.2
* - 6
- 1.04
- 14
- 7.3
* - 7
- 1.6
- 15
- 8.3
Example set for rise-time=0.13s, on-time=0.26s,
fall_time=6.2s, off_time=0.51s:
.. code-block:: bash
echo 1 > rise_time
echo 2 > on_time
echo 13 > fall_time
echo 4 > off_time
Maximum and minimum breathing Level
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- **max_breathing_level**
- **min_breathing_level**
Loop
~~~~~
- **loop_begin** - choose where to start the loop:
.. flat-table::
* - Value
- Description
* - 0
- Begin from 'rise' state
* - 1
- Begin from 'on' state
* - 2
- Begin from 'fall' state
* - 3
- Begin from 'off' state
- **loop_end_on** - write ``1`` loop end at 'on' state.
- **repeat** - loop times. When write ``0``, the loop is end-less.
Others
~~~~~~
- **clear_leds** - bitmask for clear leds to pattern.
For example clear leds 1, 2, 3, 4, 5, 7 (``10111110``):
.. code-block:: bash
echo be > clear_leds
- **select_leds** - bitmask for set leds to pattern.
For example select leds 0, 3, 6, 7 (``11001001``):
.. code-block:: bash
echo c9 > select_leds
- **mode** - pattern mode:
``0`` - manual control, ``1`` - auto breathing
- **start** - start/stop pattern:
``0`` - to stop, ``1`` - to start
- **toggle** - manual on/off control (see :ref:`manual_breath_mode`):
``0`` - LEDs off, ``1`` - LEDs on
- **ramp** - the smooth ramp up/down function (see :ref:`manual_breath_mode`):
``0`` - disable, ``1`` - enable
- **running** - Reading this file will return the pattern state:
``1`` - is running, ``0`` - is finished (or not running)
This file supports poll() to detect when the pattern finished.
.. _auto_breath_mode:
Auto breathing mode
~~~~~~~~~~~~~~~~~~~
::
breathing level
^
max _ ________________
| /. .\
| / . . \
| / . . \
| / . . \
| / . . \
| / . . \
min _ ___/ . . \_______
| . . . .
| . . . .
| . rise . on . fall . off
|
-|------------------------------------------------> time
Example:
.. code-block:: bash
echo 10 > rise_time # 3.1 seconds
echo 4 > on_time # 0.51 seconds
echo 1 > off_time # 0.13 seconds
echo 10 > fall_time # 3.1 seconds
echo 0 > min_breathing_level
echo 255 > max_breathing_level
echo 0 > loop_begin # begin from 'rise'
echo 0 > loop_end_on # loop end at 'off' state
echo 1 > mode # auto breathing mode
echo 5 > repeat # 5 times repeat
echo 1249 > select_leds # select 0, 3, 6, 9 12 leds (1001001001001)
echo 1 > start # run
.. _manual_breath_mode:
Manual control mode
~~~~~~~~~~~~~~~~~~~
When 'ramp' enabled (echo 1 > ramp)::
breathing level
^
max _ ____________________
| / .\
| / . \
| / . \
| / . \
| / . \
| / . \
min _ ______/ . \_______
| . .
| . .
| . .
| (echo 1 > toggle) (echo 0 > toggle)
-|---------------------------------------------------> time
When 'ramp' disabled (echo 0 > ramp)::
breathing level
^
max _ __________________________
| | |
| | |
| | |
| | |
| | |
| | |
min _ ______| |_______
| . .
| . .
| . .
| echo 1 > toggle echo 0 > toggle
-|---------------------------------------------------> time
|
