Ben Evans / Mbed 2 deprecated Defender_Game

Ben Evans University Second Year Project. Game Called Defender.

Dependencies:   mbed

https://os.mbed.com/media/uploads/evanso/84bc1a30759fd6a1e3f1fd1fae3e97c2.png

Hello, soldier, you have been specially selected as the defender of planet earth.

Your mission, if you choose to accept it. Fly around the planet and pulverise invading alien ships for as long as you can. Stop the aliens abducting the innocent people on the ground. Be warned if an alien ship manages to abduct a person and take them to top of the screen, they will no longer move randomly and will begin to hunt you down. This sounds like a challenge you were trained for.

But don’t worry soldier you’re not going into battle empty-handed. Your ship is equipped with a state of the art laser beam that has unlimited ammo and four smart bombs that will destroy anything on the screen. The ship also has three lives so use them wisely.

As time goes on more alien ships will arrive on planet earth increasing the difficulty of your mission. And remember the landscape bellow loops around so if you continually fly in the same direction you go to your original position. Good luck soldier.

SDFileSystem/SDCRC.cpp

Committer:
evanso
Date:
2020-05-27
Revision:
87:832ca78426b5
Parent:
48:e308067cfea5

File content as of revision 87:832ca78426b5:

/* SD/MMC File System Library
 * Copyright (c) 2016 Neil Thiessen
 *
 * 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 "SDCRC.h"

namespace SDCRC
{

namespace
{
const char m_Crc7Table[] = {
    0x00, 0x09, 0x12, 0x1B, 0x24, 0x2D, 0x36, 0x3F,
    0x48, 0x41, 0x5A, 0x53, 0x6C, 0x65, 0x7E, 0x77,
    0x19, 0x10, 0x0B, 0x02, 0x3D, 0x34, 0x2F, 0x26,
    0x51, 0x58, 0x43, 0x4A, 0x75, 0x7C, 0x67, 0x6E,
    0x32, 0x3B, 0x20, 0x29, 0x16, 0x1F, 0x04, 0x0D,
    0x7A, 0x73, 0x68, 0x61, 0x5E, 0x57, 0x4C, 0x45,
    0x2B, 0x22, 0x39, 0x30, 0x0F, 0x06, 0x1D, 0x14,
    0x63, 0x6A, 0x71, 0x78, 0x47, 0x4E, 0x55, 0x5C,
    0x64, 0x6D, 0x76, 0x7F, 0x40, 0x49, 0x52, 0x5B,
    0x2C, 0x25, 0x3E, 0x37, 0x08, 0x01, 0x1A, 0x13,
    0x7D, 0x74, 0x6F, 0x66, 0x59, 0x50, 0x4B, 0x42,
    0x35, 0x3C, 0x27, 0x2E, 0x11, 0x18, 0x03, 0x0A,
    0x56, 0x5F, 0x44, 0x4D, 0x72, 0x7B, 0x60, 0x69,
    0x1E, 0x17, 0x0C, 0x05, 0x3A, 0x33, 0x28, 0x21,
    0x4F, 0x46, 0x5D, 0x54, 0x6B, 0x62, 0x79, 0x70,
    0x07, 0x0E, 0x15, 0x1C, 0x23, 0x2A, 0x31, 0x38,
    0x41, 0x48, 0x53, 0x5A, 0x65, 0x6C, 0x77, 0x7E,
    0x09, 0x00, 0x1B, 0x12, 0x2D, 0x24, 0x3F, 0x36,
    0x58, 0x51, 0x4A, 0x43, 0x7C, 0x75, 0x6E, 0x67,
    0x10, 0x19, 0x02, 0x0B, 0x34, 0x3D, 0x26, 0x2F,
    0x73, 0x7A, 0x61, 0x68, 0x57, 0x5E, 0x45, 0x4C,
    0x3B, 0x32, 0x29, 0x20, 0x1F, 0x16, 0x0D, 0x04,
    0x6A, 0x63, 0x78, 0x71, 0x4E, 0x47, 0x5C, 0x55,
    0x22, 0x2B, 0x30, 0x39, 0x06, 0x0F, 0x14, 0x1D,
    0x25, 0x2C, 0x37, 0x3E, 0x01, 0x08, 0x13, 0x1A,
    0x6D, 0x64, 0x7F, 0x76, 0x49, 0x40, 0x5B, 0x52,
    0x3C, 0x35, 0x2E, 0x27, 0x18, 0x11, 0x0A, 0x03,
    0x74, 0x7D, 0x66, 0x6F, 0x50, 0x59, 0x42, 0x4B,
    0x17, 0x1E, 0x05, 0x0C, 0x33, 0x3A, 0x21, 0x28,
    0x5F, 0x56, 0x4D, 0x44, 0x7B, 0x72, 0x69, 0x60,
    0x0E, 0x07, 0x1C, 0x15, 0x2A, 0x23, 0x38, 0x31,
    0x46, 0x4F, 0x54, 0x5D, 0x62, 0x6B, 0x70, 0x79
};

const unsigned short m_Crc16Table[256] = {
    0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
    0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
    0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
    0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
    0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
    0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
    0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
    0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
    0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
    0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
    0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
    0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
    0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
    0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
    0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
    0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
    0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
    0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
    0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
    0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
    0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
    0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
    0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
    0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
    0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
    0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
    0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
    0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
    0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
    0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
    0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
    0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
};
}

char crc7(const char* data, int length)
{
    //Calculate the CRC7 checksum for the specified data block
    char crc = 0;
    for (int i = 0; i < length; i++) {
        crc = m_Crc7Table[(crc << 1) ^ data[i]];
    }

    //Return the calculated checksum
    return crc;
}

unsigned short crc16(const char* data, int length)
{
    //Calculate the CRC16 checksum for the specified data block
    unsigned short crc = 0;
    for (int i = 0; i < length; i++) {
        crc = (crc << 8) ^ m_Crc16Table[((crc >> 8) ^ data[i]) & 0x00FF];
    }

    //Return the calculated checksum
    return crc;
}

}