1 /*
2 * Copyright (c) 2019 Vestas Wind Systems A/S
3 *
4 * SPDX-License-Identifier: Apache-2.0
5 */
6
7 /**
8 * @file
9 * @brief PWM shell commands.
10 */
11
12 #include <zephyr/shell/shell.h>
13 #include <zephyr/drivers/pwm.h>
14 #include <stdlib.h>
15
16 struct args_index {
17 uint8_t device;
18 uint8_t channel;
19 uint8_t period;
20 uint8_t pulse;
21 uint8_t flags;
22 };
23
24 static const struct args_index args_indx = {
25 .device = 1,
26 .channel = 2,
27 .period = 3,
28 .pulse = 4,
29 .flags = 5,
30 };
31
cmd_cycles(const struct shell * sh,size_t argc,char ** argv)32 static int cmd_cycles(const struct shell *sh, size_t argc, char **argv)
33 {
34 pwm_flags_t flags = 0;
35 const struct device *dev;
36 uint32_t period;
37 uint32_t pulse;
38 uint32_t channel;
39 int err;
40
41 dev = device_get_binding(argv[args_indx.device]);
42 if (!dev) {
43 shell_error(sh, "PWM device not found");
44 return -EINVAL;
45 }
46
47 channel = strtoul(argv[args_indx.channel], NULL, 0);
48 period = strtoul(argv[args_indx.period], NULL, 0);
49 pulse = strtoul(argv[args_indx.pulse], NULL, 0);
50
51 if (argc == (args_indx.flags + 1)) {
52 flags = strtoul(argv[args_indx.flags], NULL, 0);
53 }
54
55 err = pwm_set_cycles(dev, channel, period, pulse, flags);
56 if (err) {
57 shell_error(sh, "failed to setup PWM (err %d)",
58 err);
59 return err;
60 }
61
62 return 0;
63 }
64
cmd_usec(const struct shell * sh,size_t argc,char ** argv)65 static int cmd_usec(const struct shell *sh, size_t argc, char **argv)
66 {
67 pwm_flags_t flags = 0;
68 const struct device *dev;
69 uint32_t period;
70 uint32_t pulse;
71 uint32_t channel;
72 int err;
73
74 dev = device_get_binding(argv[args_indx.device]);
75 if (!dev) {
76 shell_error(sh, "PWM device not found");
77 return -EINVAL;
78 }
79
80 channel = strtoul(argv[args_indx.channel], NULL, 0);
81 period = strtoul(argv[args_indx.period], NULL, 0);
82 pulse = strtoul(argv[args_indx.pulse], NULL, 0);
83
84 if (argc == (args_indx.flags + 1)) {
85 flags = strtoul(argv[args_indx.flags], NULL, 0);
86 }
87
88 err = pwm_set(dev, channel, PWM_USEC(period), PWM_USEC(pulse), flags);
89 if (err) {
90 shell_error(sh, "failed to setup PWM (err %d)", err);
91 return err;
92 }
93
94 return 0;
95 }
96
cmd_nsec(const struct shell * sh,size_t argc,char ** argv)97 static int cmd_nsec(const struct shell *sh, size_t argc, char **argv)
98 {
99 pwm_flags_t flags = 0;
100 const struct device *dev;
101 uint32_t period;
102 uint32_t pulse;
103 uint32_t channel;
104 int err;
105
106 dev = device_get_binding(argv[args_indx.device]);
107 if (!dev) {
108 shell_error(sh, "PWM device not found");
109 return -EINVAL;
110 }
111
112 channel = strtoul(argv[args_indx.channel], NULL, 0);
113 period = strtoul(argv[args_indx.period], NULL, 0);
114 pulse = strtoul(argv[args_indx.pulse], NULL, 0);
115
116 if (argc == (args_indx.flags + 1)) {
117 flags = strtoul(argv[args_indx.flags], NULL, 0);
118 }
119
120 err = pwm_set(dev, channel, period, pulse, flags);
121 if (err) {
122 shell_error(sh, "failed to setup PWM (err %d)", err);
123 return err;
124 }
125
126 return 0;
127 }
128
129 SHELL_STATIC_SUBCMD_SET_CREATE(pwm_cmds,
130 SHELL_CMD_ARG(cycles, NULL, "<device> <channel> <period in cycles> "
131 "<pulse width in cycles> [flags]", cmd_cycles, 5, 1),
132 SHELL_CMD_ARG(usec, NULL, "<device> <channel> <period in usec> "
133 "<pulse width in usec> [flags]", cmd_usec, 5, 1),
134 SHELL_CMD_ARG(nsec, NULL, "<device> <channel> <period in nsec> "
135 "<pulse width in nsec> [flags]", cmd_nsec, 5, 1),
136 SHELL_SUBCMD_SET_END
137 );
138
139 SHELL_CMD_REGISTER(pwm, &pwm_cmds, "PWM shell commands", NULL);
140
