1 /*
2 * Author: Brendan Le Foll <brendan.le.foll@intel.com>
3 * Copyright (c) 2014 Intel Corporation.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <unistd.h>
29
30 #include "mraa/gpio.h"
31
32 struct gpio_source {
33 int pin;
34 mraa_gpio_context context;
35 };
36
37 void
print_version()38 print_version()
39 {
40 fprintf(stdout, "Version %s on %s\n", mraa_get_version(), mraa_get_platform_name());
41 }
42
43 void
print_help()44 print_help()
45 {
46 fprintf(stdout, "list List pins\n");
47 fprintf(stdout, "set pin level Set pin to level (0/1)\n");
48 fprintf(stdout, "setraw pin level Set pin to level (0/1) via mmap (if available)\n");
49 fprintf(stdout, "get pin Get pin level\n");
50 fprintf(stdout, "getraw pin Get pin level via mmap (if available)\n");
51 fprintf(stdout, "monitor pin Monitor pin level changes\n");
52 fprintf(stdout, "version Get mraa version and board name\n");
53 }
54
55 void
print_command_error()56 print_command_error()
57 {
58 fprintf(stdout, "Invalid command, options are:\n");
59 print_help();
60 }
61
62 int
list_platform_pins(uint8_t platform_offset)63 list_platform_pins(uint8_t platform_offset)
64 {
65 int pin_count = mraa_get_platform_pin_count(platform_offset);
66 int i;
67 for (i = 0; i < pin_count; ++i) {
68 int pin_id = platform_offset > 0 ? mraa_get_sub_platform_id(i) : i;
69 char* pin_name = mraa_get_pin_name(pin_id);
70 if (strcmp(pin_name, "INVALID") != 0) {
71 fprintf(stdout, "%02d ", pin_id);
72 fprintf(stdout, "%*s: ", (MRAA_PIN_NAME_SIZE - 1), pin_name);
73 if (mraa_pin_mode_test(pin_id, MRAA_PIN_GPIO))
74 fprintf(stdout, "GPIO ");
75 if (mraa_pin_mode_test(pin_id, MRAA_PIN_I2C))
76 fprintf(stdout, "I2C ");
77 if (mraa_pin_mode_test(pin_id, MRAA_PIN_SPI))
78 fprintf(stdout, "SPI ");
79 if (mraa_pin_mode_test(pin_id, MRAA_PIN_PWM))
80 fprintf(stdout, "PWM ");
81 if (mraa_pin_mode_test(pin_id, MRAA_PIN_AIO))
82 fprintf(stdout, "AIO ");
83 if (mraa_pin_mode_test(pin_id, MRAA_PIN_UART))
84 fprintf(stdout, "UART ");
85 fprintf(stdout, "\n");
86 }
87 }
88 return pin_count;
89 }
90
91 int
list_pins()92 list_pins()
93 {
94 int pin_count = 0;
95 pin_count += list_platform_pins(MRAA_MAIN_PLATFORM_OFFSET);
96 pin_count += list_platform_pins(MRAA_SUB_PLATFORM_OFFSET);
97 if (pin_count == 0) {
98 fprintf(stdout, "No Pins\n");
99 }
100 }
101
102
103 mraa_result_t
gpio_set(int pin,int level,mraa_boolean_t raw)104 gpio_set(int pin, int level, mraa_boolean_t raw)
105 {
106 mraa_gpio_context gpio = mraa_gpio_init(pin);
107 if (gpio != NULL) {
108 mraa_gpio_dir(gpio, MRAA_GPIO_OUT);
109 if (raw != 0) {
110 if (mraa_gpio_use_mmaped(gpio, 1) != MRAA_SUCCESS) {
111 fprintf(stdout,
112 "mmapped access to gpio %d not supported, falling back to normal mode\n", pin);
113 }
114 }
115 mraa_gpio_write(gpio, level);
116 return MRAA_SUCCESS;
117 }
118 return MRAA_ERROR_INVALID_RESOURCE;
119 }
120
121 mraa_result_t
gpio_get(int pin,int * level,mraa_boolean_t raw)122 gpio_get(int pin, int* level, mraa_boolean_t raw)
123 {
124 mraa_gpio_context gpio = mraa_gpio_init(pin);
125 if (gpio != NULL) {
126 mraa_gpio_dir(gpio, MRAA_GPIO_IN);
127 if (raw != 0) {
128 if (mraa_gpio_use_mmaped(gpio, 1) != MRAA_SUCCESS) {
129 fprintf(stdout,
130 "mmapped access to gpio %d not supported, falling back to normal mode\n", pin);
131 }
132 }
133 *level = mraa_gpio_read(gpio);
134 return MRAA_SUCCESS;
135 }
136 return MRAA_ERROR_INVALID_RESOURCE;
137 }
138
139
140 void
gpio_isr_handler(void * args)141 gpio_isr_handler(void* args)
142 {
143 struct gpio_source* gpio_info = (struct gpio_source*) args;
144 int level = mraa_gpio_read(gpio_info->context);
145 fprintf(stdout, "Pin %d = %d\n", gpio_info->pin, level);
146 }
147
148 mraa_result_t
gpio_isr_start(struct gpio_source * gpio_info)149 gpio_isr_start(struct gpio_source* gpio_info)
150 {
151 gpio_info->context = mraa_gpio_init(gpio_info->pin);
152 if (gpio_info->context != NULL) {
153 mraa_result_t status = mraa_gpio_dir(gpio_info->context, MRAA_GPIO_IN);
154 if (status == MRAA_SUCCESS) {
155 status = mraa_gpio_isr(gpio_info->context, MRAA_GPIO_EDGE_BOTH, &gpio_isr_handler, gpio_info);
156 }
157 return status;
158 } else {
159 return MRAA_ERROR_INVALID_RESOURCE;
160 }
161 }
162
163
164 mraa_result_t
gpio_isr_stop(struct gpio_source * gpio_info)165 gpio_isr_stop(struct gpio_source* gpio_info)
166 {
167 mraa_gpio_isr_exit(gpio_info->context);
168 mraa_gpio_close(gpio_info->context);
169 return MRAA_SUCCESS;
170 }
171
172
173 int
main(int argc,char ** argv)174 main(int argc, char** argv)
175 {
176 if (argc == 1) {
177 print_command_error();
178 }
179
180 if (argc > 1) {
181 if (strcmp(argv[1], "list") == 0) {
182 list_pins();
183 } else if (strcmp(argv[1], "help") == 0) {
184 print_help();
185 } else if (strcmp(argv[1], "version") == 0) {
186 print_version();
187 } else if ((strcmp(argv[1], "set") == 0) || (strcmp(argv[1], "setraw") == 0)) {
188 if (argc == 4) {
189 int pin = atoi(argv[2]);
190 mraa_boolean_t rawmode = strcmp(argv[1], "setraw") == 0;
191 if (gpio_set(pin, atoi(argv[3]), rawmode) != MRAA_SUCCESS)
192 fprintf(stdout, "Could not initialize gpio %d\n", pin);
193 } else {
194 print_command_error();
195 }
196 } else if ((strcmp(argv[1], "get") == 0) || (strcmp(argv[1], "getraw") == 0)) {
197 if (argc == 3) {
198 int pin = atoi(argv[2]);
199 int level;
200 mraa_boolean_t rawmode = strcmp(argv[1], "getraw") == 0;
201 if (gpio_get(pin, &level, rawmode) == MRAA_SUCCESS) {
202 fprintf(stdout, "Pin %d = %d\n", pin, level);
203 } else {
204 fprintf(stdout, "Could not initialize gpio %d\n", pin);
205 }
206 } else {
207 print_command_error();
208 }
209 } else if (strcmp(argv[1], "monitor") == 0) {
210 if (argc == 3) {
211 int pin = atoi(argv[2]);
212 struct gpio_source gpio_info;
213 gpio_info.pin = pin;
214 if (gpio_isr_start(&gpio_info) == MRAA_SUCCESS) {
215 fprintf(stdout, "Monitoring level changes to pin %d. Press RETURN to exit.\n", pin);
216 gpio_isr_handler(&gpio_info);
217 char aux = 0;
218 do {
219 fflush(stdin);
220 fscanf(stdin, "%c", &aux);
221 } while (aux != '\n');
222 gpio_isr_stop(&gpio_info);
223 } else {
224 fprintf(stdout, "Failed to register ISR for pin %d\n", pin);
225 }
226 } else {
227 print_command_error();
228 }
229 } else {
230 print_command_error();
231 }
232 }
233 return 0;
234 }
235