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
|
/*
ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include "ch.h"
#include "hal.h"
static void pwmpcb(PWMDriver *pwmp) {
(void)pwmp;
palClearPad(PORT11, P11_LED1);
}
static void pwmc1cb(PWMDriver *pwmp) {
(void)pwmp;
palSetPad(PORT11, P11_LED1);
}
static PWMConfig pwmcfg = {
100000, /* 100kHz PWM clock frequency.*/
20000, /* Initial PWM period 0.2s.*/
pwmpcb,
{
{PWM_OUTPUT_ACTIVE_HIGH, pwmc1cb}
},
PWM_ALIGN_EDGE
};
icucnt_t last_width, last_period;
static void icuwidthcb(ICUDriver *icup) {
palSetPad(PORT11, P11_LED2);
last_width = icuGetWidth(icup);
}
static void icuperiodcb(ICUDriver *icup) {
palClearPad(PORT11, P11_LED2);
last_period = icuGetPeriod(icup);
}
static ICUConfig icucfg = {
ICU_INPUT_ACTIVE_HIGH,
100000, /* 100kHz ICU clock frequency.*/
icuwidthcb,
icuperiodcb,
NULL
};
/*
* Application entry point.
*/
int main(void) {
/* Initialization of all the imported components in the order specified in
the application wizard. The function is generated automatically.*/
componentsInit();
palClearPad(PORT11, P11_LED4);
/*
* Initializes the PWM driver 8 and ICU driver 1.
* PIN80 is the PWM output.
* PIN63 is the ICU input.
* The two pins have to be externally connected together.
*/
/* Sets PIN63 alternative function.*/
SIU.PCR[179].R = 0b0000011000001100;
/* Sets PIN65 alternative function.*/
SIU.PCR[181].R = 0b0000010100001100;
icuStart(&ICUD2, &icucfg);
icuEnable(&ICUD2);
pwmStart(&PWMD1, &pwmcfg);
chThdSleepMilliseconds(2000);
/*
* Starts the PWM channel 0 using 75% duty cycle.
*/
pwmEnableChannel(&PWMD1, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD1, 7500));
chThdSleepMilliseconds(5000);
/*
* Changes the PWM channel 0 to 50% duty cycle.
*/
pwmEnableChannel(&PWMD1, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD1, 5000));
chThdSleepMilliseconds(5000);
/*
* Changes the PWM channel 0 to 25% duty cycle.
*/
pwmEnableChannel(&PWMD1, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD1, 2500));
chThdSleepMilliseconds(5000);
/*
* Changes PWM period and the PWM channel 0 to 50% duty cycle.
*/
pwmChangePeriod(&PWMD1, 25000);
pwmEnableChannel(&PWMD1, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD1, 5000));
chThdSleepMilliseconds(5000);
/*
* Disables PWM channel 0 and stops the drivers.
*/
pwmDisableChannel(&PWMD1, 0);
pwmStop(&PWMD1);
/*
* Disables and stops the ICU drivers.
*/
icuDisable(&ICUD2);
icuStop(&ICUD2);
palClearPad(PORT11, P11_LED3);
palClearPad(PORT11, P11_LED4);
/*
* Normal main() thread activity, in this demo it does nothing.
*/
while (TRUE) {
chThdSleepMilliseconds(500);
}
return 0;
}
|