diff --git a/gpio-util/Makefile.am b/gpio-util/Makefile.am
index 9bdc42d..241cb19 100644
--- a/gpio-util/Makefile.am
+++ b/gpio-util/Makefile.am
@@ -5,6 +5,7 @@
 	phosphor-gpio-util
 
 phosphor_gpio_util_SOURCES = \
+	argument.cpp \
 	gpio.cpp \
 	main.cpp
 
diff --git a/gpio-util/argument.cpp b/gpio-util/argument.cpp
new file mode 100644
index 0000000..222b7d3
--- /dev/null
+++ b/gpio-util/argument.cpp
@@ -0,0 +1,95 @@
+/**
+ * Copyright © 2017 IBM Corporation
+ *
+ * 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.
+ */
+#include <iostream>
+#include <iterator>
+#include <algorithm>
+#include "argument.hpp"
+
+namespace phosphor
+{
+namespace gpio
+{
+
+ArgumentParser::ArgumentParser(int argc, char** argv)
+{
+    int option = 0;
+    while (-1 != (option = getopt_long(argc, argv, optionStr, options, NULL)))
+    {
+        if ((option == '?') || (option == 'h'))
+        {
+            usage(argv);
+            exit(-1);
+        }
+
+        auto i = &options[0];
+        while ((i->val != option) && (i->val != 0))
+        {
+            ++i;
+        }
+
+        if (i->val)
+        {
+            arguments[i->name] = (i->has_arg ? optarg : trueString);
+        }
+    }
+}
+
+const std::string& ArgumentParser::operator[](const std::string& opt)
+{
+    auto i = arguments.find(opt);
+    if (i == arguments.end())
+    {
+        return emptyString;
+    }
+    else
+    {
+        return i->second;
+    }
+}
+
+void ArgumentParser::usage(char** argv)
+{
+    std::cerr << "Usage: " << argv[0] << " [options]\n";
+    std::cerr << "Options:\n";
+    std::cerr << "    --help            Print this menu.\n";
+    std::cerr << "    --gpio=<gpio>     The GPIO number.  Example: 1\n";
+    std::cerr << "    --path=<path>     The path to the GPIO device."
+                                        "  Example: /dev/gpiochip0\n";
+    std::cerr << "    --delay=<delay>   The delay in ms in between a toggle."
+                                        "  Example: 5\n";
+    std::cerr << "    --action=<action> The action to do.\n";
+    std::cerr << "                      Valid actions: low, high, low_high, "
+                                        "high_low\n";
+    std::cerr << std::flush;
+}
+
+const option ArgumentParser::options[] =
+{
+    { "action", required_argument, NULL, 'a' },
+    { "gpio",   required_argument, NULL, 'g' },
+    { "delay",  required_argument, NULL, 'd' },
+    { "path",   required_argument, NULL, 'p' },
+    { "help",   no_argument,       NULL, 'h' },
+    { 0, 0, 0, 0},
+};
+
+const char* ArgumentParser::optionStr = "a:g:d:p:h?";
+
+const std::string ArgumentParser::trueString = "true";
+const std::string ArgumentParser::emptyString = "";
+
+}
+}
diff --git a/gpio-util/argument.hpp b/gpio-util/argument.hpp
new file mode 100644
index 0000000..a6cccc7
--- /dev/null
+++ b/gpio-util/argument.hpp
@@ -0,0 +1,64 @@
+#pragma once
+
+#include <getopt.h>
+#include <map>
+#include <string>
+
+namespace phosphor
+{
+namespace gpio
+{
+/** @brief Class - Encapsulates parsing command line options and
+ *                 populating arguments
+ */
+class ArgumentParser
+{
+    public:
+        ArgumentParser() = delete;
+        ~ArgumentParser() = default;
+        ArgumentParser(const ArgumentParser&) = delete;
+        ArgumentParser& operator=(const ArgumentParser&) = delete;
+        ArgumentParser(ArgumentParser&&) = default;
+        ArgumentParser& operator=(ArgumentParser&&) = default;
+
+        /** @brief Contructs Argument object
+         *
+         *  @param argc - the main function's argc passed as is
+         *  @param argv - the main function's argv passed as is
+         *  @return Object constructed
+         */
+        ArgumentParser(int argc, char** argv);
+
+        /** @brief Given an option, returns its argument(optarg)
+         *
+         *  @param opt - command line option string
+         *
+         *  @return argument which is a standard optarg
+         */
+        const std::string& operator[](const std::string& opt);
+
+        /** @brief Displays usage
+         *
+         *  @param argv - the main function's argv passed as is
+         */
+        static void usage(char** argv);
+
+        /** @brief Set to 'true' when an option is passed */
+        static const std::string trueString;
+
+        /** @brief Set to '' when an option is not passed */
+        static const std::string emptyString;
+
+    private:
+        /** @brief Option to argument mapping */
+        std::map<const std::string, std::string> arguments;
+
+        /** @brief Array of struct options as needed by getopt_long */
+        static const option options[];
+
+        /** @brief optstring as needed by getopt_long */
+        static const char* optionStr;
+};
+
+} // namespace gpio
+} // namespace phosphor
diff --git a/gpio-util/main.cpp b/gpio-util/main.cpp
index b8801aa..fb56e66 100644
--- a/gpio-util/main.cpp
+++ b/gpio-util/main.cpp
@@ -14,7 +14,187 @@
  * limitations under the License.
  */
 
+/**
+ * This program is a utility for accessing GPIOs.
+ * Actions:
+ *   low:  Set a GPIO low
+ *   high: Set a GPIO high
+ *   low_high: Set a GPIO low, delay if requested, set it high
+ *   high_low: Set a GPIO high, delay if requested, set it low
+ */
+
+#include <algorithm>
+#include <chrono>
+#include <iostream>
+#include <map>
+#include <thread>
+#include <phosphor-logging/log.hpp>
+#include "argument.hpp"
+#include "gpio.hpp"
+
+using namespace phosphor::gpio;
+using namespace phosphor::logging;
+
+typedef void (*gpioFunction)(GPIO&, unsigned int);
+using gpioFunctionMap = std::map<std::string, gpioFunction>;
+
+/**
+ * Sets a GPIO low
+ *
+ * @param[in] gpio - the GPIO object
+ * @param[in] delayInMS - Unused in this function
+ */
+void low(GPIO& gpio, unsigned int delayInMS)
+{
+    gpio.set(GPIO::Value::low);
+}
+
+
+/**
+ * Sets a GPIO high
+ *
+ * @param[in] gpio - the GPIO object
+ * @param[in] delayInMS - Unused in this function
+ */
+void high(GPIO& gpio, unsigned int delayInMS)
+{
+    gpio.set(GPIO::Value::high);
+}
+
+
+/**
+ * Sets a GPIO high, then delays, then sets it low
+ *
+ * @param[in] gpio - the GPIO object
+ * @param[in] delayInMS - The delay in between the sets
+ */
+void highLow(GPIO& gpio, unsigned int delayInMS)
+{
+    gpio.set(GPIO::Value::high);
+
+    std::chrono::milliseconds delay{delayInMS};
+    std::this_thread::sleep_for(delay);
+
+    gpio.set(GPIO::Value::low);
+}
+
+
+/**
+ * Sets a GPIO low, then delays, then sets it high
+ *
+ * @param[in] gpio - the GPIO to write
+ * @param[in] delayInMS - The delay in between the sets
+ */
+void lowHigh(GPIO& gpio, unsigned int delayInMS)
+{
+    gpio.set(GPIO::Value::low);
+
+    std::chrono::milliseconds delay{delayInMS};
+    std::this_thread::sleep_for(delay);
+
+    gpio.set(GPIO::Value::high);
+}
+
+
+/**
+ * The actions supported by this program
+ */
+static const gpioFunctionMap functions
+{
+    {"low", low},
+    {"high", high},
+    {"low_high", lowHigh},
+    {"high_low", highLow}
+};
+
+
+/**
+ * Prints usage and exits the program
+ *
+ * @param[in] err - the error message to print
+ * @param[in] argv - argv from main()
+ */
+void exitWithError(const char* err, char** argv)
+{
+    std::cerr << "ERROR: " << err << "\n";
+    ArgumentParser::usage(argv);
+    exit(EXIT_FAILURE);
+}
+
+
+/**
+ * Returns the number value of the argument passed in.
+ *
+ * @param[in] name - the argument name
+ * @param[in] parser - the argument parser
+ * @param[in] argv - arv from main()
+ */
+template<typename T>
+T getValueFromArg(const char* name,
+                  ArgumentParser& parser,
+                  char** argv)
+{
+    char* p = NULL;
+    auto val = strtol(parser[name].c_str(), &p, 10);
+
+    //strol sets p on error, also we don't allow negative values
+    if (*p || (val < 0))
+    {
+        using namespace std::string_literals;
+        std::string msg = "Invalid "s + name + " value passed in";
+        exitWithError(msg.c_str(), argv);
+    }
+    return static_cast<T>(val);
+}
+
+
 int main(int argc, char** argv)
 {
+    ArgumentParser args(argc, argv);
+
+    auto path = args["path"];
+    if (path == ArgumentParser::emptyString)
+    {
+        exitWithError("GPIO device path not specified", argv);
+    }
+
+    auto action = args["action"];
+    if (action == ArgumentParser::emptyString)
+    {
+        exitWithError("Action not specified", argv);
+    }
+
+    if (args["gpio"] == ArgumentParser::emptyString)
+    {
+        exitWithError("GPIO not specified", argv);
+    }
+
+    auto gpioNum = getValueFromArg<gpioNum_t>("gpio", args, argv);
+
+    //Not all actions require a delay, so not required
+    unsigned int delay = 0;
+    if (args["delay"] != ArgumentParser::emptyString)
+    {
+        delay = getValueFromArg<decltype(delay)>("delay", args, argv);
+    }
+
+    auto function = functions.find(action);
+    if (function == functions.end())
+    {
+        exitWithError("Invalid action value passed in", argv);
+    }
+
+    GPIO gpio{path, gpioNum, GPIO::Direction::output};
+
+    try
+    {
+        function->second(gpio, delay);
+    }
+    catch (std::runtime_error& e)
+    {
+        std::cerr << e.what();
+        return -1;
+    }
+
     return 0;
 }