main.c

/******************************************************************************
* File Name:   main.c
*
* Description: This is the source code for the XMC MCU: PRNG for ModusToolbox.
*
* Related Document: See README.md
*
******************************************************************************
*
* Copyright (c) 2015-2021, Infineon Technologies AG
* All rights reserved.                        
*                                             
* Boost Software License - Version 1.0 - August 17th, 2003
* 
* Permission is hereby granted, free of charge, to any person or organization
* obtaining a copy of the software and accompanying documentation covered by
* this license (the "Software") to use, reproduce, display, distribute,
* execute, and transmit the Software, and to prepare derivative works of the
* Software, and to permit third-parties to whom the Software is furnished to
* do so, all subject to the following:
* 
* The copyright notices in the Software and this entire statement, including
* the above license grant, this restriction and the following disclaimer,
* must be included in all copies of the Software, in whole or in part, and
* all derivative works of the Software, unless such copies or derivative
* works are solely in the form of machine-executable object code generated by
* a source language processor.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
* SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
* FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*                                                                              
*****************************************************************************/

#include "cybsp.h"
#include "cy_utils.h"
#include "cy_retarget_io.h"

/*******************************************************************************
* Macros
********************************************************************************/
#define SCREEN_HEADER "\r\n__________________________________________________"\
           "____________________________\r\n*\tXMC MCU: PRNG: "\
           "Pseudo Random Number Generation\r\n*\r\n*\tThis code example "\
           "demonstrates generating a random numbers\r\n*\tusing the"\
           " Pseudo Random Number generation feature of MCU\r\n*\t"\
           "cryptography block\r\n*\r\n*\tUART Terminal Settings\tBaud Rate:"\
           "115200 bps 8N1 \r\n*"\
           "\r\n__________________________________________________"\
           "____________________________\r\n\n"

#define SCREEN_HEADER1             "\r\n================================================="\
                                   "=============================\r\n"

/* \x1b[2J\x1b[;H - ANSI ESC sequence for clear screen */
#define CLEAR_SCREEN               "\x1b[2J\x1b[;H"

#define PRNG_DELAY_BW_ITERATION    1000

#define PRNG_DELAY                 5

#define LEN_RANDOM_NUM             10

/*******************************************************************************
* Function Name: main
********************************************************************************
* Summary:
* This is the main function for CM0 CPU. It configures the PRNG block to
* generate random number. A new Random number is generated every 5 ms.
* This process repeats every 5 seconds
*
* Parameters:
*  void
*
* Return:
*  int
*
*******************************************************************************/

int main(void)
{
    cy_rslt_t result;

    /* Initialize the device and board peripherals */
    result = cybsp_init();
    if (result != CY_RSLT_SUCCESS)
    {
        CY_ASSERT(0);
    }

    /* Note: retarget_io_init API in PDL CAT3 taking different parameter as
     * compared to what we have with PSoC 6 and XMC7000.
     * Initialize retarget-io to use the debug UART port */
    result = cy_retarget_io_init(CYBSP_DEBUG_UART_HW);

    /* retarget-io init failed. Stop program execution */
    if (result != CY_RSLT_SUCCESS)
    {
        CY_ASSERT(0);
    }

    /* \x1b[2J\x1b[;H - ANSI ESC sequence for clear screen */
    printf(CLEAR_SCREEN);

    printf(SCREEN_HEADER);

    for (;;)
    {
            printf("\nPRN Generated in BYTES\r\n");

            /* Loop for showing the generated random number in BYTES. */
            for (uint32_t i = 1U; i <= LEN_RANDOM_NUM; i++)
            {
                XMC_Delay(PRNG_DELAY);

                /* Checks the validity of the generated random data */
                if(XMC_PRNG_CheckValidStatus())
                {
                    /* the function gives the generated random number by returning the content of WORD register. */
                    printf("%02lu: Result in BYTES is 0x%02X \r\n", i, (uint8_t) XMC_PRNG_GetPseudoRandomNumber());
                }
            }

            /* The function sets the random data block size as byte or word */
            XMC_PRNG_SetRandomDataBlockSize(XMC_PRNG_RDBS_WORD);

            printf("\nPRN Generated in WORDS\r\n");

            /* Loop for showing the generated random number in WORDS. */
            for (uint32_t j = 1U; j <= LEN_RANDOM_NUM; j++)
            {
                XMC_Delay(PRNG_DELAY);

                /* Checks the validity of the generated random data */
                if(XMC_PRNG_CheckValidStatus())
                {
                    /* the function gives the generated random number by returning the content of WORD register. */
                    printf("%02lu: Result in WORDS is 0x%02X \r\n", j, (uint16_t) XMC_PRNG_GetPseudoRandomNumber());
                }
            }

            printf(SCREEN_HEADER1);

            XMC_Delay(PRNG_DELAY_BW_ITERATION);
    }
}
/* [] END OF FILE */