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pwm.c
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1 /*******************************************************************************
2 * Copyright (C) 2019 Moxa Inc. All rights reserved.
3 * SPDX-License-Identifier: Apache-2.0
4 *
5 * PWM Sample Application
6 *
7 * Date Author Comment
8 * 2018-12-25 Eddy Chiu Created it.
9 ******************************************************************************/
10
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <unistd.h>
49 #include <iothinx/iothinxio.h>
50
52 int main(int argc, char **const argv)
53 {
54 int32_t rc;
55 uint32_t do_slot = 2;
56 uint8_t do_modes[16];
57 uint8_t pwm_channel_start = 0;
58 uint8_t pwm_channel_count = 2;
59 uint32_t pwm_starts = 0;
60 uint16_t pwm_freqs[4];
61 uint16_t pwm_dutys[4];
62 uint32_t pwm_counts[4];
63 int32_t i;
64 char ch;
65
66 while (-1 != (rc = getopt(argc, argv, "c:hn:s:")))
67 {
68 switch (rc)
69 {
70 case 'c':
71 pwm_channel_start = atoi(optarg);
72 break;
73 case 'n':
74 pwm_channel_count = atoi(optarg);
75 break;
76 case 's':
77 do_slot = atoi(optarg);
78 break;
79 case 'h':
80 default:
81 printf("PWM sample program.\n\n");
82 printf("Usage: ./pwm [OPTIONS]\n\n");
83 printf("Options:\n");
84 printf("\t%-8s Slot of DO module. Default slot = %d\n", "-s", do_slot);
85 printf("\t%-8s PWM start channel. Default channel = %d\n", "-c", pwm_channel_start);
86 printf("\t%-8s PWM channel count. Default count = %d\n", "-n", pwm_channel_count);
87 printf("\n");
88 return 0;
89 }
90 }
91
92 printf("DO slot = %lu\n", do_slot);
93 printf("PWM start channel = %u\n", pwm_channel_start);
94 printf("PWM channel count = %u\n", pwm_channel_count);
95
96 // initialize ioThinx I/O
97 rc = ioThinx_IO_Client_Init();
98 if (rc != IOTHINX_ERR_OK)
99 {
100 printf("ioThinx_IO_Client_Init() = %d\n", rc);
101 return -1;
102 }
103
104 // temporarily set config
105 for (i = 0; i < pwm_channel_count; i++)
106 {
107 do_modes[i] = DO_MODE_PWM;
108 }
109 rc = ioThinx_DO_Config_SetModes(do_slot, pwm_channel_start, pwm_channel_count, do_modes);
110 if (rc != IOTHINX_ERR_OK)
111 {
112 printf("ioThinx_DO_Config_SetModes() = %d\n", rc);
113 }
114
115 for (i = 0; i < pwm_channel_count; i++)
116 {
117 pwm_counts[i] = 0; // infinite
118 }
119 rc = ioThinx_DO_Config_SetPwmCounts(do_slot, pwm_channel_start, pwm_channel_count, pwm_counts);
120 if (rc != IOTHINX_ERR_OK)
121 {
122 printf("ioThinx_DO_Config_SetPwmCounts() = %d\n", rc);
123 }
124
125 for (i = 0; i < pwm_channel_count; i++)
126 {
127 pwm_freqs[i] = 5;
128 pwm_dutys[i] = 50;
129 }
130 rc = ioThinx_DO_Config_SetPwmConfigures(do_slot, pwm_channel_start, pwm_channel_count, pwm_freqs, pwm_dutys);
131 if (rc != IOTHINX_ERR_OK)
132 {
133 printf("ioThinx_DO_Config_SetPwmConfigures() = %d\n", rc);
134 }
135
136 // reload config
137 rc = ioThinx_IO_Config_Reload();
138 if (rc != IOTHINX_ERR_OK)
139 {
140 printf("ioThinx_IO_Config_Reload() = %d\n", rc);
141 }
142
143 // start pwm
144 pwm_starts = 0;
145 for (i = 0; i < pwm_channel_count; i++)
146 {
147 pwm_starts |= 0x1 << (pwm_channel_start + i);
148 }
149 rc = ioThinx_DO_SetPwmStarts(do_slot, pwm_starts);
150 if (rc != IOTHINX_ERR_OK)
151 {
152 printf("ioThinx_DO_SetPwmStarts() = %d\n", rc);
153 }
154
155 // set value
156 do
157 {
158 pwm_dutys[0] = (pwm_dutys[0] >= 100) ? 0 : pwm_dutys[0] + 10; // runtime adjust the duty cycle
159 rc = ioThinx_DO_SetPwmConfigures(do_slot, pwm_channel_start, 1, pwm_freqs, pwm_dutys);
160 if (rc != IOTHINX_ERR_OK)
161 {
162 printf("ioThinx_DO_SetPwmConfigures() = %d\n", rc);
163 }
164 for (i = 0; i < pwm_channel_count; i++)
165 {
166 printf("[%lu:%u] frequency = %d, duty cycle = %d\n", do_slot, pwm_channel_start+i, pwm_freqs[i], pwm_dutys[i]);
167 }
168 ch = getchar();
169 }
170 while (ch != 'q');
171
172 rc = ioThinx_DO_SetPwmStops(do_slot, pwm_starts);
173 if (rc != IOTHINX_ERR_OK)
174 {
175 printf("ioThinx_DO_SetPwmStops() = %d\n", rc);
176 }
177
178 return 0;
179 }
ioThinx_DO_SetPwmStops
IOTHINX_ERR ioThinx_DO_SetPwmStops(uint32_t slot, uint32_t stops)
DO_MODE_PWM
#define DO_MODE_PWM
Definition: iothinxio.h:292
IOTHINX_ERR_OK
#define IOTHINX_ERR_OK
Definition: iothinxio.h:35
ioThinx_DO_Config_SetModes
IOTHINX_ERR ioThinx_DO_Config_SetModes(uint32_t slot, uint8_t start, uint8_t count, uint8_t buf[])
ioThinx_IO_Config_Reload
IOTHINX_ERR ioThinx_IO_Config_Reload(void)
ioThinx_DO_Config_SetPwmConfigures
IOTHINX_ERR ioThinx_DO_Config_SetPwmConfigures(uint32_t slot, uint8_t start, uint8_t count, uint16_t frequencies[], uint16_t duty_cycles[])
ioThinx_IO_Client_Init
IOTHINX_ERR ioThinx_IO_Client_Init(void)
ioThinx_DO_SetPwmConfigures
IOTHINX_ERR ioThinx_DO_SetPwmConfigures(uint32_t slot, uint8_t start, uint8_t count, uint16_t frequencies[], uint16_t duty_cycles[])
ioThinx_DO_SetPwmStarts
IOTHINX_ERR ioThinx_DO_SetPwmStarts(uint32_t slot, uint32_t starts)
main
int main(int argc, char **const argv)
Definition: pwm.c:52
ioThinx_DO_Config_SetPwmCounts
IOTHINX_ERR ioThinx_DO_Config_SetPwmCounts(uint32_t slot, uint8_t start, uint8_t count, uint32_t buf[])