220 lines
7.1 KiB
C
220 lines
7.1 KiB
C
/*
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* Author: Brendan Le Foll <brendan.le.foll@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "mraa/gpio.h"
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struct gpio_source {
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int pin;
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mraa_gpio_context context;
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};
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void
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print_version()
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{
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fprintf(stdout, "Version %s on %s\n", mraa_get_version(), mraa_get_platform_name());
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}
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void
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print_help()
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{
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fprintf(stdout, "list List pins\n");
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fprintf(stdout, "set pin level Set pin to level (0/1)\n");
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fprintf(stdout, "setraw pin level Set pin to level (0/1) via mmap (if available)\n");
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fprintf(stdout, "get pin Get pin level\n");
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fprintf(stdout, "getraw pin Get pin level via mmap (if available)\n");
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fprintf(stdout, "monitor pin Monitor pin level changes\n");
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fprintf(stdout, "version Get mraa version and board name\n");
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}
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void
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print_command_error()
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{
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fprintf(stdout, "Invalid command, options are:\n");
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print_help();
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}
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void
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list_pins()
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{
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int pin_count = mraa_get_pin_count();
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if (pin_count == 0) {
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fprintf(stdout, "No Pins\n");
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return;
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}
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int i;
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for (i = 0; i < pin_count; ++i) {
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if (strcmp(mraa_get_pin_name(i), "INVALID") != 0) {
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fprintf(stdout, "%02d ", i);
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fprintf(stdout, "%8s: ", mraa_get_pin_name(i));
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if (mraa_pin_mode_test(i, MRAA_PIN_GPIO))
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fprintf(stdout, "GPIO ");
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if (mraa_pin_mode_test(i, MRAA_PIN_I2C))
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fprintf(stdout, "I2C ");
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if (mraa_pin_mode_test(i, MRAA_PIN_SPI))
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fprintf(stdout, "SPI ");
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if (mraa_pin_mode_test(i, MRAA_PIN_PWM))
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fprintf(stdout, "PWM ");
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if (mraa_pin_mode_test(i, MRAA_PIN_AIO))
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fprintf(stdout, "AIO ");
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if (mraa_pin_mode_test(i, MRAA_PIN_UART))
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fprintf(stdout, "UART ");
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fprintf(stdout, "\n");
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}
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}
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}
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mraa_result_t
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gpio_set(int pin, int level, mraa_boolean_t raw)
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{
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mraa_gpio_context gpio = mraa_gpio_init(pin);
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if (gpio != NULL) {
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mraa_gpio_dir(gpio, MRAA_GPIO_OUT);
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if (raw != 0) {
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if (mraa_gpio_use_mmaped(gpio, 1) != MRAA_SUCCESS) {
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fprintf(stdout,
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"mmapped access to gpio not supported, falling back to normal mode\n", pin);
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}
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}
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mraa_gpio_write(gpio, level);
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return MRAA_SUCCESS;
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}
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return MRAA_ERROR_INVALID_RESOURCE;
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}
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mraa_result_t
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gpio_get(int pin, int* level, mraa_boolean_t raw)
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{
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mraa_gpio_context gpio = mraa_gpio_init(pin);
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if (gpio != NULL) {
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mraa_gpio_dir(gpio, MRAA_GPIO_IN);
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if (raw != 0) {
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if (mraa_gpio_use_mmaped(gpio, 1) != MRAA_SUCCESS) {
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fprintf(stdout,
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"mmapped access to gpio not supported, falling back to normal mode\n", pin);
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}
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}
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*level = mraa_gpio_read(gpio);
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return MRAA_SUCCESS;
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}
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return MRAA_ERROR_INVALID_RESOURCE;
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}
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void
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gpio_isr_handler(void* args)
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{
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struct gpio_source* gpio_info = (struct gpio_source*) args;
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int level = mraa_gpio_read(gpio_info->context);
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fprintf(stdout, "Pin %d = %d\n", gpio_info->pin, level);
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}
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mraa_result_t
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gpio_isr_start(struct gpio_source* gpio_info)
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{
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gpio_info->context = mraa_gpio_init(gpio_info->pin);
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if (gpio_info->context != NULL) {
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mraa_result_t status = mraa_gpio_dir(gpio_info->context, MRAA_GPIO_IN);
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if (status == MRAA_SUCCESS) {
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status = mraa_gpio_isr(gpio_info->context, MRAA_GPIO_EDGE_BOTH, &gpio_isr_handler, gpio_info);
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}
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return status;
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} else {
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return MRAA_ERROR_INVALID_RESOURCE;
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}
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}
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mraa_result_t
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gpio_isr_stop(struct gpio_source* gpio_info)
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{
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mraa_gpio_isr_exit(gpio_info->context);
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mraa_gpio_close(gpio_info->context);
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return MRAA_SUCCESS;
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}
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int
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main(int argc, char** argv)
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{
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if (argc == 1) {
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print_command_error();
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}
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if (argc > 1) {
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if (strcmp(argv[1], "list") == 0) {
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list_pins();
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} else if (strcmp(argv[1], "help") == 0) {
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print_help();
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} else if (strcmp(argv[1], "version") == 0) {
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print_version();
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} else if ((strcmp(argv[1], "set") == 0) || (strcmp(argv[1], "setraw") == 0)) {
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if (argc == 4) {
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int pin = atoi(argv[2]);
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mraa_boolean_t rawmode = strcmp(argv[1], "setraw") == 0;
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if (gpio_set(pin, atoi(argv[3]), rawmode) != MRAA_SUCCESS)
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fprintf(stdout, "Could not initialize gpio %d\n", pin);
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} else {
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print_command_error();
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}
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} else if ((strcmp(argv[1], "get") == 0) || (strcmp(argv[1], "getraw") == 0)) {
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if (argc == 3) {
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int pin = atoi(argv[2]);
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int level;
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mraa_boolean_t rawmode = strcmp(argv[1], "getraw") == 0;
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if (gpio_get(pin, &level, rawmode) == MRAA_SUCCESS) {
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fprintf(stdout, "Pin %d = %d\n", pin, level);
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} else {
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fprintf(stdout, "Could not initialize gpio %d\n", pin);
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}
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} else {
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print_command_error();
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}
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} else if (strcmp(argv[1], "monitor") == 0) {
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if (argc == 3) {
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int pin = atoi(argv[2]);
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struct gpio_source gpio_info;
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gpio_info.pin = pin;
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if (gpio_isr_start(&gpio_info) == MRAA_SUCCESS) {
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fprintf(stdout, "Monitoring level changes to pin %d. Press RETURN to exit.\n", pin);
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gpio_isr_handler(&gpio_info);
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while (getchar() != '\n')
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;
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gpio_isr_stop(&gpio_info);
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} else {
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fprintf(stdout, "Failed to register ISR for pin %d\n", pin);
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}
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} else {
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print_command_error();
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}
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} else {
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print_command_error();
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}
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}
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return 0;
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}
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