forked from jgarff/rpi_ws281x
-
Notifications
You must be signed in to change notification settings - Fork 33
/
Copy pathpwm.h
122 lines (106 loc) · 4.33 KB
/
pwm.h
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
/*
* pwm.h
*
* Copyright (c) 2014 Jeremy Garff <jer @ jers.net>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted
* provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
* 3. Neither the name of the owner nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef __PWM_H__
#define __PWM_H__
/*
*
* Pin mappint of alternate pin configuration for PWM
*
* GPIO ALT PWM0 ALT PWM1
*
* 12 0
* 13 0
* 18 5
* 19 5
* 40 0
* 41 0
* 45 0
* 52 1
* 53 1
*
*/
#define RPI_PWM_CHANNELS 2
typedef struct
{
uint32_t ctl;
#define RPI_PWM_CTL_MSEN2 (1 << 15)
#define RPI_PWM_CTL_USEF2 (1 << 13)
#define RPI_PWM_CTL_POLA2 (1 << 12)
#define RPI_PWM_CTL_SBIT2 (1 << 11)
#define RPI_PWM_CTL_RPTL2 (1 << 10)
#define RPI_PWM_CTL_MODE2 (1 << 9)
#define RPI_PWM_CTL_PWEN2 (1 << 8)
#define RPI_PWM_CTL_MSEN1 (1 << 7)
#define RPI_PWM_CTL_CLRF1 (1 << 6)
#define RPI_PWM_CTL_USEF1 (1 << 5)
#define RPI_PWM_CTL_POLA1 (1 << 4)
#define RPI_PWM_CTL_SBIT1 (1 << 3)
#define RPI_PWM_CTL_RPTL1 (1 << 2)
#define RPI_PWM_CTL_MODE1 (1 << 1)
#define RPI_PWM_CTL_PWEN1 (1 << 0)
uint32_t sta;
#define RPI_PWM_STA_STA4 (1 << 12)
#define RPI_PWM_STA_STA3 (1 << 11)
#define RPI_PWM_STA_STA2 (1 << 10)
#define RPI_PWM_STA_STA1 (1 << 9)
#define RPI_PWM_STA_BERR (1 << 8)
#define RPI_PWM_STA_GAP04 (1 << 7)
#define RPI_PWM_STA_GAP03 (1 << 6)
#define RPI_PWM_STA_GAP02 (1 << 5)
#define RPI_PWM_STA_GAP01 (1 << 4)
#define RPI_PWM_STA_RERR1 (1 << 3)
#define RPI_PWM_STA_WERR1 (1 << 2)
#define RPI_PWM_STA_EMPT1 (1 << 1)
#define RPI_PWM_STA_FULL1 (1 << 0)
uint32_t dmac;
#define RPI_PWM_DMAC_ENAB (1 << 31)
#define RPI_PWM_DMAC_PANIC(val) ((val & 0xff) << 8)
#define RPI_PWM_DMAC_DREQ(val) ((val & 0xff) << 0)
uint32_t resvd_0x0c;
uint32_t rng1;
uint32_t dat1;
uint32_t fif1;
uint32_t resvd_0x1c;
uint32_t rng2;
uint32_t dat2;
} __attribute__((packed)) pwm_t;
#define PWM_OFFSET (0x0020c000)
#define PWM_PERIPH_PHYS (0x7e20c000)
typedef struct
{
int pinnum;
int altnum;
} pwm_pin_table_t;
typedef struct
{
const int count;
const pwm_pin_table_t *pins;
} pwm_pin_tables_t;
int pwm_pin_alt(int chan, int pinnum);
#endif /* __PWM_H__ */