Subversion Repositories neo430

// #################################################################################################

// #  < CRC unit test program >                                                                    #

// # ********************************************************************************************* #

// # BSD 3-Clause License                                                                          #

// #                                                                                               #

// # Copyright (c) 2020, Stephan Nolting. All rights reserved.                                     #

// #                                                                                               #

// # Redistribution and use in source and binary forms, with or without modification, are          #

// # permitted provided that the following conditions are met:                                     #

// #                                                                                               #

// # 1. Redistributions of source code must retain the above copyright notice, this list of        #

// #    conditions and the following disclaimer.                                                   #

// #                                                                                               #

// # 2. Redistributions in binary form must reproduce the above copyright notice, this list of     #

// #    conditions and the following disclaimer in the documentation and/or other materials        #

// #    provided with the distribution.                                                            #

// #                                                                                               #

// # 3. Neither the name of the copyright holder nor the names of its contributors may be used to  #

// #    endorse or promote products derived from this software without specific prior written      #

// #    permission.                                                                                #

// #                                                                                               #

// # 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.                                                            #

// # ********************************************************************************************* #

// # The NEO430 Processor - https://github.com/stnolting/neo430                                    #

// #################################################################################################

// Libraries

#include <stdint.h>

#include <string.h>

#include <neo430.h>

// Configuration

#define BAUD_RATE 19200

/* ------------------------------------------------------------

 * INFO Main function

 * ------------------------------------------------------------ */

int main(void) {

  char buffer[256];

  // CRC results were validated using http://crccalc.com/

  // setup UART

  neo430_uart_setup(BAUD_RATE);

  neo430_uart_br_print("\n<<< CRC16/CRC32 module test >>>\n");

  // check if CRC unit was synthesized, exit if not available

  if (!(SYS_FEATURES & (1<<SYS_CRC_EN))) {

    neo430_uart_br_print("Error! No CRC unit synthesized!");

    return 1;

  }

  // get start values

  neo430_uart_br_print("\nEnter start value for CRC16 shift register (4hex): 0x");

  neo430_uart_scan(buffer, 4+1, 1);

  uint16_t crc16_start = (uint16_t)neo430_hexstr_to_uint(buffer, 4);

  neo430_uart_br_print("\nEnter start value for CRC32 shift register (8hex): 0x");

  neo430_uart_scan(buffer, 8+1, 1);

  uint32_t crc32_start = neo430_hexstr_to_uint(buffer, 8);

  // get polynomial masks

  neo430_uart_br_print("\nEnter polynomial mask for CRC16 (4hex): 0x");

  neo430_uart_scan(buffer, 4+1, 1);

  uint16_t crc16_poly = (uint16_t)neo430_hexstr_to_uint(buffer, 4);

  neo430_uart_br_print("\nEnter polynomial mask for CRC32 (8hex): 0x");

  neo430_uart_scan(buffer, 8+1, 1);

  uint32_t crc32_poly = neo430_hexstr_to_uint(buffer, 8);

  while(1) {

    // get actual data

    neo430_uart_br_print("\nEnter text for CRC16/32 computation: ");

    neo430_uart_scan(buffer, 255, 1);

    uint16_t crc16_res = neo430_crc16(crc16_start, crc16_poly, (uint8_t*)buffer, strlen(buffer));

    uint32_t crc32_res = neo430_crc32(crc32_start, crc32_poly, (uint8_t*)buffer, strlen(buffer));

    // show results

    neo430_uart_br_print("\nCRC16 = 0x");

    neo430_uart_print_hex_word(crc16_res);

    neo430_uart_br_print("\nCRC32 = 0x");

    neo430_uart_print_hex_word((uint16_t)(crc32_res >> 16));

    neo430_uart_print_hex_word((uint16_t)crc32_res);

    neo430_uart_br_print("\n");

  }

  return 0;

}