// Raspberry Pi LPC1114 I/O Processor Expansion Board SPI Agent Firmware
// loopback test program

// Copyright (C)2014-2018, Philip Munts, President, Munts AM Corp.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

using System;
using System.Diagnostics;
using SPIAgent;

namespace spi_agent_xmlrpc_client
{
    class Program
    {
        static void Main(string[] args)
        {
            string servername = "localhost";
            int iterations = 50000;
            Transport spiagent = new Transport();
            SPIAGENT_COMMAND_MSG_t cmd = new SPIAGENT_COMMAND_MSG_t();
            SPIAGENT_RESPONSE_MSG_t resp;
            Stopwatch timer = new Stopwatch();

            Console.WriteLine("\nRaspberry Pi LPC1114 I/O Processor Expansion Board Loopback Test\n");

            // Analyze command line arguments

            switch (args.Length)
            {
                case 0:
                    break;

                case 1:
                    servername = args[0];
                    break;

                case 2:
                    servername = args[0];
                    iterations = int.Parse(args[1]);
                    break;

                default:
                    Console.WriteLine("Usage: spi_agent_xmlrpc_client <hostname> <iterations>");
                    Environment.Exit(1);
                    break;
            }

            // Initialize the SPIAgent library

            spiagent.Open(servername);

            // Issue some SPI transactions

            Console.WriteLine("Issuing some SPI transactions...\n");

            // Build command message, with NOP command

            cmd.command = (int)Commands.SPIAGENT_CMD_NOP;
            cmd.pin = 0;
            cmd.data = 0;

            // Issue the command

            spiagent.Command(cmd, out resp);

            // Display the response from the slave MCU

            Console.WriteLine("Response: command:" + resp.command.ToString().PadRight(4, ' ') + " " +
              "pin:" + resp.pin.ToString().PadRight(4, ' ') + " " +
              "data:" + resp.data.ToString().PadRight(4, ' ') + " " +
              "error" + resp.error.ToString().PadRight(4, ' '));

            // Build command message, with LOOPBACK command

            cmd.command = (int)Commands.SPIAGENT_CMD_LOOPBACK;
            cmd.pin = 2;
            cmd.data = 3;

            // Issue the command

            spiagent.Command(cmd, out resp);

            // Display the response from the slave MCU

            Console.WriteLine("Response: command:" + resp.command.ToString().PadRight(4, ' ') + " " +
              "pin:" + resp.pin.ToString().PadRight(4, ' ') + " " +
              "data:" + resp.data.ToString().PadRight(4, ' ') + " " +
              "error" + resp.error.ToString().PadRight(4, ' '));

            // Build command message, with illegal pin number

            cmd.command = (int)Commands.SPIAGENT_CMD_GET_GPIO;
            cmd.pin = 99;
            cmd.data = 3;

            // Issue the command

            spiagent.Command(cmd, out resp);

            // Display the response from the slave MCU

            Console.WriteLine("Response: command:" + resp.command.ToString().PadRight(4, ' ') + " " +
              "pin:" + resp.pin.ToString().PadRight(4, ' ') + " " +
              "data:" + resp.data.ToString().PadRight(4, ' ') + " " +
              "error" + resp.error.ToString().PadRight(4, ' '));

            // Build command message, with illegal command field

            cmd.command = 99;
            cmd.pin = 2;
            cmd.data = 3;

            // Issue the command

            spiagent.Command(cmd, out resp);

            // Display the response from the slave MCU

            Console.WriteLine("Response: command:" + resp.command.ToString().PadRight(4, ' ') + " " +
              "pin:" + resp.pin.ToString().PadRight(4, ' ') + " " +
              "data:" + resp.data.ToString().PadRight(4, ' ') + " " +
              "error" + resp.error.ToString().PadRight(4, ' '));

            // Query the LPC1114 firmware version

            cmd.command = (int)Commands.SPIAGENT_CMD_NOP;
            cmd.pin = 0;
            cmd.data = 0;

            spiagent.Command(cmd, out resp);

            if (resp.error != (int)errno.EOK)
            {
                Console.WriteLine("ERROR: The SPI Agent Firmware returned error=" + resp.error.ToString());
                Environment.Exit(1);
            }

            Console.WriteLine("\nThe LPC1114 firmware version is  " + resp.data.ToString());

            // Query the LPC1114 device ID

            cmd.command = (int)Commands.SPIAGENT_CMD_GET_SFR;
            cmd.pin = 0x400483F4;
            cmd.data = 0;

            spiagent.Command(cmd, out resp);

            if (resp.error != (int)errno.EOK)
            {
                Console.WriteLine("ERROR: The SPI Agent Firmware returned error=" + resp.error.ToString());
                Environment.Exit(1);
            }

            Console.WriteLine("The LPC1114 device ID is         " + resp.data.ToString("X"));

            // Query the expansion board LED state

            cmd.command = (int)Commands.SPIAGENT_CMD_GET_GPIO;
            cmd.pin = Pins.LPC1114_LED;
            cmd.data = 0;

            spiagent.Command(cmd, out resp);

            if (resp.error != (int)errno.EOK)
            {
                Console.WriteLine("ERROR: The SPI Agent Firmware returned error=" + resp.error.ToString());
                Environment.Exit(1);
            }

            Console.WriteLine("The expansion board LED is       " + ((resp.data == 0) ? "OFF" : "ON") + "\n");

            // Perform SPI loopback commands as fast as possible to stress test the SPI interface

            Console.WriteLine("Starting " + iterations.ToString() + " SPI agent loopback test transactions...\n");

            timer.Start();

            for (int i = 1; i < iterations; i++)
            {
                cmd.command = (int)Commands.SPIAGENT_CMD_LOOPBACK;
                cmd.pin = i * 17;
                cmd.data = i * 19;

                spiagent.Command(cmd, out resp);

                if ((resp.command != cmd.command) ||
                    (resp.pin != cmd.pin) ||
                    (resp.data != cmd.data) ||
                    (resp.error != (int)errno.EOK))
                {
                    Console.WriteLine("Iteration: " + i.ToString().PadRight(6, ' ') + " Response: " +
                        "command: " + resp.command.ToString() + " " +
                        "pin: " + resp.pin.ToString() + " " +
                        "data: " + resp.data.ToString() + " " +
                        "error: " + resp.error.ToString());
                }
            }

            timer.Stop();

            // Display statistics

            double duration = timer.ElapsedMilliseconds/1000.0;
            double rate = iterations/duration;
            double cycletime = duration/iterations*1.0E6;

            Console.WriteLine("Performed " + iterations.ToString() + " loopback tests in " + duration.ToString("F2") + " seconds");
            Console.WriteLine("  " + rate.ToString("F2") + " iterations per second");
            Console.WriteLine("  " + cycletime.ToString("F2") + " microseconds per iteration\n");

            // Cleanup

            spiagent.Close();

            Environment.Exit(0);
        }
    }
}