/**
  ******************************************************************************
  * @file    USART/Polling/main.c 
  * @author  MCD Application Team
  * @version V3.5.0
  * @date    08-April-2011
  * @brief   Main program body
  ******************************************************************************
  * @attention
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
  ******************************************************************************
  */ 

/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "platform_config.h"

/** @addtogroup STM32F10x_StdPeriph_Examples
  * @{
  */

/** @addtogroup USART_Polling
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
typedef enum { FAILED = 0, PASSED = !FAILED} TestStatus;

/* Private define ------------------------------------------------------------*/
#define TxBufferSize   (countof(TxBuffer))

/* Private macro -------------------------------------------------------------*/
#define countof(a)   (sizeof(a) / sizeof(*(a)))

/* Private variables ---------------------------------------------------------*/
USART_InitTypeDef USART_InitStructure;
uint8_t TxBuffer[] = "Buffer Send from USARTy to USARTz using Flags";
uint8_t RxBuffer[TxBufferSize];
__IO uint8_t TxCounter = 0, RxCounter = 0;  
volatile TestStatus TransferStatus = FAILED;  

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void GPIO_Configuration(void);
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
__IO uint8_t index = 0;
  
/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
int main(void)
{
  /*!< At this stage the microcontroller clock setting is already configured, 
       this is done through SystemInit() function which is called from startup
       file (startup_stm32f10x_xx.s) before to branch to application main.
       To reconfigure the default setting of SystemInit() function, refer to
       system_stm32f10x.c file
     */     
       
  /* System Clocks Configuration */
  RCC_Configuration();

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

/* USARTy and USARTz configuration ------------------------------------------------------*/
  /* USARTy and USARTz configured as follow:
        - BaudRate = 230400 baud  
        - Word Length = 8 Bits
        - One Stop Bit
        - Even parity
        - Hardware flow control disabled (RTS and CTS signals)
        - Receive and transmit enabled
  */
  USART_InitStructure.USART_BaudRate = 230400;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_Even;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
  
  /* Configure USARTy */
  USART_Init(USARTy, &USART_InitStructure);
  /* Configure USARTz */
  USART_Init(USARTz, &USART_InitStructure);
  
  /* Enable the USARTy */
  USART_Cmd(USARTy, ENABLE);

  /* Enable the USARTz */
  USART_Cmd(USARTz, ENABLE);

  while(TxCounter < TxBufferSize)
  {   
    /* Send one byte from USARTy to USARTz */
    USART_SendData(USARTy, TxBuffer[TxCounter++]);
    
    /* Loop until USARTy DR register is empty */ 
    while(USART_GetFlagStatus(USARTy, USART_FLAG_TXE) == RESET)
    {
    }
    
    /* Loop until the USARTz Receive Data Register is not empty */
    while(USART_GetFlagStatus(USARTz, USART_FLAG_RXNE) == RESET)
    {
    }

    /* Store the received byte in RxBuffer */
    RxBuffer[RxCounter++] = (USART_ReceiveData(USARTz) & 0x7F);  
    
  } 
  /* Check the received data with the send ones */
  TransferStatus = Buffercmp(TxBuffer, RxBuffer, TxBufferSize);
  /* 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 */

  while (1)
  {
  }
}

/**
  * @brief  Configures the different system clocks.
  * @param  None
  * @retval None
  */
void RCC_Configuration(void)
{    
  /* Enable GPIO clock */
  RCC_APB2PeriphClockCmd(USARTy_GPIO_CLK | USARTz_GPIO_CLK | RCC_APB2Periph_AFIO, ENABLE);

#ifndef USE_STM3210C_EVAL
  /* Enable USARTy Clock */
  RCC_APB2PeriphClockCmd(USARTy_CLK, ENABLE); 
#else
  /* Enable USARTy Clock */
  RCC_APB1PeriphClockCmd(USARTy_CLK, ENABLE); 
#endif
  /* Enable USARTz Clock */
  RCC_APB1PeriphClockCmd(USARTz_CLK, ENABLE);  
}

/**
  * @brief  Configures the different GPIO ports.
  * @param  None
  * @retval None
  */
void GPIO_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

#ifdef USE_STM3210C_EVAL
  /* Enable the USART3 Pins Software Remapping */
  GPIO_PinRemapConfig(GPIO_PartialRemap_USART3, ENABLE);
  
  /* Enable the USART2 Pins Software Remapping */
  GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);  
#elif defined(USE_STM3210B_EVAL) || defined(USE_STM32100B_EVAL)
  /* Enable the USART2 Pins Software Remapping */
  GPIO_PinRemapConfig(GPIO_Remap_USART2, ENABLE);
#endif

  /* Configure USARTy Rx as input floating */
  GPIO_InitStructure.GPIO_Pin = USARTy_RxPin;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);
  
  /* Configure USARTz Rx as input floating */
  GPIO_InitStructure.GPIO_Pin = USARTz_RxPin;
  GPIO_Init(USARTz_GPIO, &GPIO_InitStructure);  
  
  /* Configure USARTy Tx as alternate function push-pull */
  GPIO_InitStructure.GPIO_Pin = USARTy_TxPin;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(USARTy_GPIO, &GPIO_InitStructure);

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

/**
  * @brief  Compares two buffers.
  * @param  pBuffer1, pBuffer2: buffers to be compared.
  * @param  BufferLength: buffer's length
  * @retval 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
  * @retval None
  */
void assert_failed(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

/**
  * @}
  */ 

/**
  * @}
  */ 

/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/