diff options
Diffstat (limited to 'peripheral/examples/mraa/gpio_output/OutputGPIO.cpp')
-rw-r--r-- | peripheral/examples/mraa/gpio_output/OutputGPIO.cpp | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/peripheral/examples/mraa/gpio_output/OutputGPIO.cpp b/peripheral/examples/mraa/gpio_output/OutputGPIO.cpp deleted file mode 100644 index 1012a2c..0000000 --- a/peripheral/examples/mraa/gpio_output/OutputGPIO.cpp +++ /dev/null @@ -1,127 +0,0 @@ -/* - * Copyright (C) 2015 The Android Open Source Project - * - * 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. - */ - -/* - * This is an example to set/clear a GPIO pin using the MRAA library. - * This may be tested with any of many GPIO devices such as an LED - * directly connected to the GPIO pin and ground, - * the Grove buzzer or Grove LED board. - * - * The on-board LED on the Edison Arudino expansion board may be - * accessed with Digital I/O 13 (mapped from Linux GPIO 243): - * example-gpio-output -p 13 -s - * - * See the following link for a table to map from the numbers on the - * board silk screen to the libmraa GPIO numbers: - * https://learn.sparkfun.com/tutorials/installing-libmraa-on-ubilinux-for-edison - */ -#include <getopt.h> -#include <stdio.h> -#include <stdlib.h> - -#include <mraa.h> - -// Structure to hold the decoded command line options -struct pgm_options { - int pin; - bool set; - bool clear; -}; - -// Be sure to keep the options for longopts and shortopts in the same order -// so that Usage() is correct. -static struct option longopts[] = { - {"help", no_argument, NULL, '?'}, - {"pin", required_argument, NULL, 'p'}, - {"set", no_argument, NULL, 's'}, - {"clear", no_argument, NULL, 'c'}, - {NULL, 0, NULL, 0 } -}; -static char shortopts[] = "?p:sc"; - -// Describes the options for this program. -void Usage(char *pgm_name) { - printf("Usage: %s [options...]\n", pgm_name); - printf("Manipulate a GPIO pin\n"); - printf("Options:\n"); - for (int i = 0, j = 0; longopts[i].name; i++, j++) { - if (shortopts[j] == ':') - j++; - printf(" --%-6s%s or -%c%s""\n", - longopts[i].name, - (shortopts[j+1] == ':') ? " <arg> " : "", - shortopts[j], - (shortopts[j+1] == ':') ? " <arg> " : ""); - } - return; -} - -// Processes all command line options. -// sets the options members for commnd line options -// returns (0) on success, -1 otherwise. -int ReadOpts(int argc, char **argv, struct pgm_options *options) { - int ch = 0; - - while ((ch = getopt_long(argc, argv, shortopts, longopts, NULL)) != -1) { - switch (ch) { - case 'p': - options->pin = atoi(optarg); - break; - case 's': - options->set = true; - break; - case 'c': - options->clear = true; - break; - default: - Usage(argv[0]); - return -1; - } - } - argc -= optind; - argv += optind; - - return 0; -} - -int main(int argc, char* argv[]) { - const unsigned kDefaultPinGPIO = 7; - pgm_options options = {kDefaultPinGPIO, false, false}; - - if (ReadOpts(argc, argv, &options) < 0) - return 1; - - mraa_init(); - mraa_gpio_context m_gpio = mraa_gpio_init(options.pin); - if (!m_gpio) { - fprintf(stderr, "Unable to initialize GPIO, invalid pin number?\n"); - return 1; - } - mraa_gpio_dir(m_gpio, MRAA_GPIO_OUT); - - if (options.set) - mraa_gpio_write(m_gpio, 1); - - // If both options were specified, wait a few seconds before clearing - if (options.clear && options.set) - sleep(5); - - if (options.clear) - mraa_gpio_write(m_gpio, 0); - - mraa_gpio_close(m_gpio); - return 0; -} |