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
|
/*
Arduino-SoftPWM: a software PWM library for Arduino
Copyright 2016, Victor Tseng <palatis@gmail.com>
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 copyright holder 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 OR
CONTRIBUTORS 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.
*/
#include <SoftPWM.h>
/* pins_arduino.h defines the pin-port/bit mapping as PROGMEM so
you have to read them with pgm_read_xxx(). That's generally okay
for ordinary use, but really bad when you're writing super fast
codes because the compiler doesn't treat them as constants and
cannot optimize them away with sbi/cbi instructions.
Therefore we have to tell the compiler the PORT and BIT here.
Hope someday we can find a way to workaround this.
Check the manual of your MCU for port/bit mapping.
The following example demonstrates setting channels for all pins
on the ATmega328P or ATmega168 used on Arduino Uno, Pro Mini,
Nano and other boards. */
SOFTPWM_DEFINE_CHANNEL(0, DDRD, PORTD, PORTD0); //Arduino pin 0
SOFTPWM_DEFINE_CHANNEL(1, DDRD, PORTD, PORTD1); //Arduino pin 1
SOFTPWM_DEFINE_CHANNEL(2, DDRD, PORTD, PORTD2); //Arduino pin 2
SOFTPWM_DEFINE_CHANNEL(3, DDRD, PORTD, PORTD3); //Arduino pin 3
SOFTPWM_DEFINE_CHANNEL(4, DDRD, PORTD, PORTD4); //Arduino pin 4
SOFTPWM_DEFINE_CHANNEL(5, DDRD, PORTD, PORTD5); //Arduino pin 5
SOFTPWM_DEFINE_CHANNEL(6, DDRD, PORTD, PORTD6); //Arduino pin 6
SOFTPWM_DEFINE_CHANNEL(7, DDRD, PORTD, PORTD7); //Arduino pin 7
SOFTPWM_DEFINE_CHANNEL(8, DDRB, PORTB, PORTB0); //Arduino pin 8
SOFTPWM_DEFINE_CHANNEL(9, DDRB, PORTB, PORTB1); //Arduino pin 9
SOFTPWM_DEFINE_CHANNEL(10, DDRB, PORTB, PORTB2); //Arduino pin 10
SOFTPWM_DEFINE_CHANNEL(11, DDRB, PORTB, PORTB3); //Arduino pin 11
SOFTPWM_DEFINE_CHANNEL(12, DDRB, PORTB, PORTB4); //Arduino pin 12
SOFTPWM_DEFINE_CHANNEL(13, DDRB, PORTB, PORTB5); //Arduino pin 13
SOFTPWM_DEFINE_CHANNEL(14, DDRC, PORTC, PORTC0); //Arduino pin A0
SOFTPWM_DEFINE_CHANNEL(15, DDRC, PORTC, PORTC1); //Arduino pin A1
SOFTPWM_DEFINE_CHANNEL(16, DDRC, PORTC, PORTC2); //Arduino pin A2
SOFTPWM_DEFINE_CHANNEL(17, DDRC, PORTC, PORTC3); //Arduino pin A3
SOFTPWM_DEFINE_CHANNEL(18, DDRC, PORTC, PORTC4); //Arduino pin A4
SOFTPWM_DEFINE_CHANNEL(19, DDRC, PORTC, PORTC5); //Arduino pin A5
/* Or you may want inverted outputs: */
/*
SOFTPWM_DEFINE_CHANNEL_INVERT(0, DDRD, PORTD, PORTD0); //Arduino pin 0
SOFTPWM_DEFINE_CHANNEL_INVERT(1, DDRD, PORTD, PORTD1); //Arduino pin 1
SOFTPWM_DEFINE_CHANNEL_INVERT(2, DDRD, PORTD, PORTD2); //Arduino pin 2
SOFTPWM_DEFINE_CHANNEL_INVERT(3, DDRD, PORTD, PORTD3); //Arduino pin 3
SOFTPWM_DEFINE_CHANNEL_INVERT(4, DDRD, PORTD, PORTD4); //Arduino pin 4
SOFTPWM_DEFINE_CHANNEL_INVERT(5, DDRD, PORTD, PORTD5); //Arduino pin 5
SOFTPWM_DEFINE_CHANNEL_INVERT(6, DDRD, PORTD, PORTD6); //Arduino pin 6
SOFTPWM_DEFINE_CHANNEL_INVERT(7, DDRD, PORTD, PORTD7); //Arduino pin 7
SOFTPWM_DEFINE_CHANNEL_INVERT(8, DDRB, PORTB, PORTB0); //Arduino pin 8
SOFTPWM_DEFINE_CHANNEL_INVERT(9, DDRB, PORTB, PORTB2); //Arduino pin 9
SOFTPWM_DEFINE_CHANNEL_INVERT(10, DDRB, PORTB, PORTB2); //Arduino pin 10
SOFTPWM_DEFINE_CHANNEL_INVERT(11, DDRB, PORTB, PORTB3); //Arduino pin 11
SOFTPWM_DEFINE_CHANNEL_INVERT(12, DDRB, PORTB, PORTB4); //Arduino pin 12
SOFTPWM_DEFINE_CHANNEL_INVERT(13, DDRB, PORTB, PORTB5); //Arduino pin 13
SOFTPWM_DEFINE_CHANNEL_INVERT(14, DDRC, PORTC, PORTC0); //Arduino pin A0
SOFTPWM_DEFINE_CHANNEL_INVERT(15, DDRC, PORTC, PORTC1); //Arduino pin A1
SOFTPWM_DEFINE_CHANNEL_INVERT(16, DDRC, PORTC, PORTC2); //Arduino pin A2
SOFTPWM_DEFINE_CHANNEL_INVERT(17, DDRC, PORTC, PORTC3); //Arduino pin A3
SOFTPWM_DEFINE_CHANNEL_INVERT(18, DDRC, PORTC, PORTC4); //Arduino pin A4
SOFTPWM_DEFINE_CHANNEL_INVERT(19, DDRC, PORTC, PORTC5); //Arduino pin A5
*/
/* Here you make an instance of desired channel counts you want
with the default 256 PWM levels (0 ~ 255). */
//SOFTPWM_DEFINE_OBJECT(20);
/* Or you can make one with only 100 PWM levels (0 ~ 99).
By using less PWM levels, you may be able to use higher
pwm frequencies. */
SOFTPWM_DEFINE_OBJECT_WITH_PWM_LEVELS(20, 100);
/* If you want to use the SoftPWM object outside where it's defined,
add the following line to the file. */
//SOFTPWM_DEFINE_EXTERN_OBJECT(16);
SOFTPWM_DEFINE_EXTERN_OBJECT_WITH_PWM_LEVELS(20, 100);
void setup() {
Serial.begin(19200);
// begin with 60hz pwm frequency
Palatis::SoftPWM.begin(60);
// print interrupt load for diagnostic purposes
Palatis::SoftPWM.printInterruptLoad();
}
static volatile uint8_t v = 0;
void loop() {
for (uint8_t i = 0; i < Palatis::SoftPWM.size(); ++i) {
Serial.print(micros());
Serial.print(" loop(): ");
Serial.println(i);
unsigned long const WAIT = 1000000 / Palatis::SoftPWM.PWMlevels() / 2;
unsigned long nextMicros = 0;
for (int v = 0; v < Palatis::SoftPWM.PWMlevels() - 1; ++v) {
while (micros() < nextMicros);
nextMicros = micros() + WAIT;
Palatis::SoftPWM.set(i, v);
}
for (int v = Palatis::SoftPWM.PWMlevels() - 1; v >= 0; --v) {
while (micros() < nextMicros);
nextMicros = micros() + WAIT;
Palatis::SoftPWM.set(i, v);
}
}
}
|
