gustavonihei commented on code in PR #1211: URL: https://github.com/apache/incubator-nuttx-apps/pull/1211#discussion_r907419232
########## examples/neopixel/neopixel_main.c: ########## @@ -0,0 +1,301 @@ +/**************************************************************************** + * apps/examples/neopixel/neopixel_main.c + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. The + * ASF licenses this file to you 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> +#include <sys/ioctl.h> + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <errno.h> +#include <debug.h> +#include <string.h> +#include <inttypes.h> + +#include <nuttx/leds/neopixel.h> + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +struct neo_config_s +{ + FAR char *path; + int loops; + int leds; + int delay; +}; + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +struct neo_config_s config = +{ + .path = NULL, + .loops = 4, /* all colors 4 times */ + .leds = 1, + .delay = 20000 /* µs -- ~50Hz */ +}; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: help + ****************************************************************************/ + +static void help(FAR struct neo_config_s *conf) +{ + printf("Usage: neopixel [OPTIONS]\n"); + + printf("\nArguments are \"sticky\". " + "For example, once the device path is\n"); + printf("specified, that path will be re-used until it is changed.\n"); + + printf(" [-p path] selects the Neopixel device. " + "Default: %s Current: %s\n", + CONFIG_EXAMPLE_NEOPIXEL_DEFAULT_DEV, conf->path ? conf->path + : "NONE"); + + printf(" [-l leds] selects number of neopixels in the chain. " + "Default: %d Current: %d\n", + 1, conf->leds); + + printf(" [-r repeat] selects the number change cycles. " + "Default: %d Current: %d\n", + 4, conf->loops); + + printf(" [-d delay] selects delay between updates. " + "Default: %d us Current: %d us\n", + 20000, conf->delay); +} + +/**************************************************************************** + * Name: set_devpath + ****************************************************************************/ + +static void set_devpath(FAR struct neo_config_s *conf, + FAR const char *devpath) +{ + /* Get rid of any old device path */ + + if (conf->path != NULL) + { + free(conf->path); + } + + /* Then set-up the new device path by copying the string */ + + conf->path = strdup(devpath); +} + +/**************************************************************************** + * Name: arg_string + ****************************************************************************/ + +static int arg_string(FAR char **arg, FAR char **value) +{ + FAR char *ptr = *arg; + + if (ptr[2] == '\0') + { + *value = arg[1]; + return 2; + } + else + { + *value = &ptr[2]; + return 1; + } +} + +/**************************************************************************** + * Name: arg_decimal + ****************************************************************************/ + +static int arg_decimal(FAR char **arg, FAR long *value) +{ + FAR char *string; + int ret; + + ret = arg_string(arg, &string); + *value = strtol(string, NULL, 10); + return ret; +} + +/**************************************************************************** + * Name: parse_args + ****************************************************************************/ + +static void parse_args(FAR struct neo_config_s *conf, + int argc, + FAR char **argv) +{ + FAR char *ptr; + FAR char *str; + long value; + int index; + int nargs; + + for (index = 1; index < argc; ) + { + ptr = argv[index]; + if (ptr[0] != '-') + { + printf("Invalid options format: %s\n", ptr); + exit(0); + } + + switch (ptr[1]) + { + case 'l': + nargs = arg_decimal(&argv[index], &value); + if (value < 1 || value > INT_MAX) + { + printf("Led count out of range: %ld\n", value); + exit(1); + } + + conf->leds = (uint32_t)value; + index += nargs; + break; + + case 'r': + nargs = arg_decimal(&argv[index], &value); + if (value < 1 || value > INT_MAX) + { + printf("Repeat out of range: %ld\n", value); + exit(1); + } + + conf->loops = (uint32_t)value; + index += nargs; + break; + + case 'p': + nargs = arg_string(&argv[index], &str); + set_devpath(conf, str); + index += nargs; + break; + + case 'd': + nargs = arg_decimal(&argv[index], &value); + if (value < 1 || value > INT_MAX) + { + printf("Delay out of range: %ld\n", value); + exit(1); + } + + conf->delay = (int)value; + index += nargs; + break; + + case 'h': + help(conf); + exit(0); + + default: + printf("Unsupported option: %s\n", ptr); Review Comment: ```suggestion fprintf(stderr, "Unsupported option: %s\n", ptr); ``` -- This is an automated message from the Apache Git Service. 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