/*****************************************************************************
 * Copyright (c) 2019, Nations Technologies Inc.
 *
 * All rights reserved.
 * ****************************************************************************
 *
 * 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 disclaimer below.
 *
 * Nations' name may not be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY NATIONS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
 * DISCLAIMED. IN NO EVENT SHALL NATIONS 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.
 * ****************************************************************************/

/**
 * @file main.c
 * @author Nations
 * @version v1.0.0
 *
 * @copyright Copyright (c) 2019, Nations Technologies Inc. All rights reserved.
 */
#include <stdio.h>
#include "main.h"

/** @addtogroup N32G4FR_StdPeriph_Examples
 * @{
 */

/** @addtogroup USART_Polling
 * @{
 */

typedef enum
{
    FAILED = 0,
    PASSED = !FAILED
} TestStatus;

#define TxBufferSize1 (countof(TxBuffer1))
#define TxBufferSize2 (countof(TxBuffer2))

#define countof(a) (sizeof(a) / sizeof(*(a)))

USART_InitType USART_InitStructure;
uint8_t TxBuffer1[] = "Buffer Send from USARTy to USARTz using Flags";
uint8_t RxBuffer1[TxBufferSize1];
uint8_t TxBuffer2[] = "Buffer Send from USARTz to USARTy using Flags";
uint8_t RxBuffer2[TxBufferSize2];
__IO uint8_t TxCounter = 0, RxCounter = 0;
volatile TestStatus TransferStatus = FAILED;

void RCC_Configuration(void);
void GPIO_Configuration(void);
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);

/**
 * @brief  Main program
 */
int main(void)
{
    /* System Clocks Configuration */
    RCC_Configuration();

    /* Configure the GPIO ports */
    GPIO_Configuration();

    /* USARTy and USARTz configuration ------------------------------------------------------*/
    USART_StructInit(&USART_InitStructure);
	USART_InitStructure.BaudRate            = 115200;
    USART_InitStructure.WordLength          = USART_WL_8B;
    USART_InitStructure.StopBits            = USART_STPB_1;
    USART_InitStructure.Parity              = USART_PE_NO;
    USART_InitStructure.HardwareFlowControl = USART_HFCTRL_NONE;
    USART_InitStructure.Mode                = USART_MODE_RX | USART_MODE_TX;

    /* Configure USARTy and USARTz */
    USART_Init(USARTy, &USART_InitStructure);
    USART_Init(USARTz, &USART_InitStructure);

    /* Enable the USARTy and USARTz */
    USART_Enable(USARTy, ENABLE);
    USART_Enable(USARTz, ENABLE);

    while (TxCounter < TxBufferSize1)
    {
        /* Send one byte from USARTy to USARTz */
        USART_SendData(USARTy, TxBuffer1[TxCounter++]);
        /* Loop until USARTy DAT register is empty */
        while (USART_GetFlagStatus(USARTy, USART_FLAG_TXDE) == RESET)
        {
        }

        /* Loop until the USARTz Receive Data Register is not empty */
        while (USART_GetFlagStatus(USARTz, USART_FLAG_RXDNE) == RESET)
        {
            /* Overflow data loss */
            if(USART_GetFlagStatus(USARTz, USART_FLAG_OREF) != RESET)
            {
                USARTz->DAT;
            }
        }
        /* Store the received byte in RxBuffer */
        RxBuffer1[RxCounter++] = (USART_ReceiveData(USARTz) & 0x7F);
    }

    /* Check the received data with the send ones */
    /* TransferStatus = PASSED, if the data transmitted from USARTy and
       received by USARTz are the same */
    /* TransferStatus = FAILED, if the data transmitted from USARTy and
       received by USARTz are different */
    TransferStatus = Buffercmp(TxBuffer1, RxBuffer1, TxBufferSize1);

    TxCounter = 0;
    RxCounter = 0;
    while (TxCounter < TxBufferSize1)
    {
        /* Send one byte from USARTz to USARTy */
        USART_SendData(USARTz, TxBuffer2[TxCounter++]);
        /* Loop until USARTz DAT register is empty */
        while (USART_GetFlagStatus(USARTz, USART_FLAG_TXDE) == RESET)
        {
        }

        /* Loop until the USARTy Receive Data Register is not empty */
        while (USART_GetFlagStatus(USARTy, USART_FLAG_RXDNE) == RESET)
        {
            /* Overflow data loss */
            if(USART_GetFlagStatus(USARTy, USART_FLAG_OREF) != RESET)
            {
                USARTy->DAT;
            }
        }
        /* Store the received byte in RxBuffer */
        RxBuffer2[RxCounter++] = (USART_ReceiveData(USARTy) & 0x7F);
    }

    /* Check the received data with the send ones */
    /* TransferStatus = PASSED, if the data transmitted from USARTz and
       received by USARTy are the same */
    /* TransferStatus = FAILED, if the data transmitted from USARTz and
       received by USARTy are different */
    TransferStatus = Buffercmp(TxBuffer2, RxBuffer2, TxBufferSize2);

    while (1)
    {
    }
}

/**
 * @brief  Configures the different system clocks.
 */
void RCC_Configuration(void)
{
    /* Enable GPIO clock */
    RCC_EnableAPB2PeriphClk(USARTy_GPIO_CLK | USARTz_GPIO_CLK | RCC_APB2_PERIPH_AFIO, ENABLE);
    /* Enable USARTy and USARTz Clock */
    USARTy_APBxClkCmd(USARTy_CLK, ENABLE);
    USARTz_APBxClkCmd(USARTz_CLK, ENABLE);
}

/**
 * @brief  Configures the different GPIO ports.
 */
void GPIO_Configuration(void)
{
    GPIO_InitType GPIO_InitStructure;
	GPIO_InitStruct(&GPIO_InitStructure);

    /* Configure USARTy Rx as input floating */
    GPIO_InitStructure.Pin       = USARTy_RxPin;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
    GPIO_InitPeripheral(USARTy_GPIO, &GPIO_InitStructure);

    /* Configure USARTz Rx as input floating */
    GPIO_InitStructure.Pin = USARTz_RxPin;
    GPIO_InitPeripheral(USARTz_GPIO, &GPIO_InitStructure);

    /* Configure USARTy Tx as alternate function push-pull */
    GPIO_InitStructure.Pin        = USARTy_TxPin;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF_PP;
    GPIO_InitPeripheral(USARTy_GPIO, &GPIO_InitStructure);

    /* Configure USARTz Tx as alternate function push-pull */
    GPIO_InitStructure.Pin = USARTz_TxPin;
    GPIO_InitPeripheral(USARTz_GPIO, &GPIO_InitStructure);
}

/**
 * @brief  Compares two buffers.
 * @param  pBuffer1, pBuffer2: buffers to be compared.
 * @param BufferLength buffer's length
 * @return PASSED: pBuffer1 identical to pBuffer2
 *         FAILED: pBuffer1 differs from pBuffer2
 */
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)
{
    while (BufferLength--)
    {
        if (*pBuffer1 != *pBuffer2)
        {
            return FAILED;
        }

        pBuffer1++;
        pBuffer2++;
    }

    return PASSED;
}

#ifdef USE_FULL_ASSERT

/**
 * @brief  Reports the name of the source file and the source line number
 *         where the assert_param error has occurred.
 * @param file pointer to the source file name
 * @param line assert_param error line source number
 */
void assert_failed(const uint8_t* expr, const uint8_t* file, uint32_t line)
{
    /* User can add his own implementation to report the file name and line number,
       ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

    /* Infinite loop */
    while (1)
    {
    }
}

#endif

/**
 * @}
 */

/**
 * @}
 */
