/**
  ******************************************************************************
  * @file    CEC/DataExchangeInterrupt/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 "stm32_eval.h"

/** @addtogroup STM32F10x_StdPeriph_Examples
  * @{
  */

/** @addtogroup CEC_DataExchangeInterrupt
  * @{
  */  


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

/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
CEC_InitTypeDef CEC_InitStructure;

uint8_t ByteNumber = 10;
volatile TestStatus TransferStatus = FAILED;
extern uint8_t TransmitBuffer[10];
extern uint8_t ReceiveBuffer[10];
extern __IO uint8_t ReceivedFrame;

/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void NVIC_Configuration(void);
void GPIO_Configuration(void);
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);
  
/* 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
     */     
       
  /* RCC configuration */
  RCC_Configuration();

  /* NVIC configuration */
  NVIC_Configuration();

  /* GPIO configuration */
  GPIO_Configuration();

  /* Configure the CEC peripheral */
  CEC_InitStructure.CEC_BitTimingMode = CEC_BitTimingStdMode;
  CEC_InitStructure.CEC_BitPeriodMode = CEC_BitPeriodStdMode;
  CEC_Init(&CEC_InitStructure);

  /* Set Prescaler value for APB1 clock PCLK1 = 24MHz */ 
  CEC_SetPrescaler(0x4AF);

  /* Set the CEC initiator address */
  CEC_OwnAddressConfig(MY_DEVICE_ADDRESS);
  
  /* Activate CEC interrupts associated to the set of RBTF,RERR, TBTF, TERR flags */
  CEC_ITConfig(ENABLE);

  /* Enable CEC */
  CEC_Cmd(ENABLE);

  /* If a frame has been received */
  while(ReceivedFrame == 0)
  {
  }
  
  /* Check the received data with the send ones */
  TransferStatus = Buffercmp(TransmitBuffer, ReceiveBuffer, ByteNumber);
  /* TransferStatus = PASSED, if the data transmitted from CEC Device1 and  
     received by CEC Device2 are the same */
  /* TransferStatus = FAILED, if the data transmitted from CEC Device1 and 
     received by CEC Device2 are different */
 
  if (TransferStatus == PASSED)
  { 
    /* OK */
    /* Turn on LED1 */
    STM_EVAL_LEDOn(LED1);
  }
  else
  { 
    /* KO */
    /* Turn on LED2 */
    STM_EVAL_LEDOn(LED2);
  }
  while(1)
  {
  }
}

/**
  * @brief  Configures the different system clocks.
  * @param  None
  * @retval None
  */
void RCC_Configuration(void)
{
  /* Enable CEC clock */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_CEC, ENABLE);

  /* Initialize LEDs and Key Button available on STM32F100B-EVAL board ***/
  /* Configure LED1, LED2, LED3 and LED4 */
  STM_EVAL_LEDInit(LED1);
  STM_EVAL_LEDInit(LED2);
  STM_EVAL_LEDInit(LED3);
  STM_EVAL_LEDInit(LED4);

  /* Configure the Key Push button and its associated EXTI Line */
  STM_EVAL_PBInit(Button_KEY, Mode_EXTI);
}

/**
  * @brief  Configures the different NVIC interrupts.
  * @param  None
  * @retval None
  */
void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  /* Configure two bits for preemption priority */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

  /* Enable the CEC global Interrupt (with higher priority) */
  NVIC_InitStructure.NVIC_IRQChannel = CEC_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

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

  /* Enable GPIOB  clocks */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
 
  /* Configure GPIOB Pin 8 (CEC line) as Output open drain */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
  GPIO_Init(GPIOB, &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****/
