Ejemplo n.º 1
0
/**
  * @brief  Configures the CEC peripheral.
  * @param  None
  * @retval None
  */
static void CEC_Config(void)
{
  CEC_InitTypeDef CEC_InitStruct;
  NVIC_InitTypeDef NVIC_InitStructure;
  GPIO_InitTypeDef GPIO_InitStructure;

  /* DeInitialize CEC to reinitialize from scratch */
  CEC_DeInit();
  
  /* Enable CEC clocks */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_CEC, ENABLE);
  
  /* Enable CEC_LINE_GPIO clocks */
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE);

  /* Configure CEC_LINE_GPIO as Output open drain */
  GPIO_PinAFConfig(GPIOB, GPIO_PinSource6 , GPIO_AF3_CEC);
  GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;
  GPIO_InitStructure.GPIO_Pin   = GPIO_Pin_6 ;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

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

  /* Configure CEC */
  CEC_InitStruct.CEC_SignalFreeTime     = CEC_SignalFreeTime_Standard;
  CEC_InitStruct.CEC_RxTolerance        = CEC_RxTolerance_Standard;
  CEC_InitStruct.CEC_StopReception      = CEC_StopReception_Off;
  CEC_InitStruct.CEC_BitRisingError     = CEC_BitRisingError_Off;
  CEC_InitStruct.CEC_LongBitPeriodError = CEC_LongBitPeriodError_Off;
  CEC_InitStruct.CEC_BRDNoGen           = CEC_BRDNoGen_On;
  CEC_InitStruct.CEC_SFTOption          = CEC_SFTOption_Off;
  CEC_Init(& CEC_InitStruct);
  
  /* Configure Own Address */
  CEC_OwnAddressConfig(MyOwnAddress);
  
  /* Enable Listen Mode */
  CEC_ListenModeCmd(ENABLE);
 
  /* Activate CEC interrupts associated to the set of TX flags */
  CEC_ITConfig(CEC_IT_TXEND|CEC_IT_TXBR,ENABLE);

  /* Activate CEC interrupts associated to the set of RX flags */
  CEC_ITConfig(CEC_IT_RXEND|CEC_IT_RXBR,ENABLE);

  /* Activate CEC interrupts associated to the set of TX error */
  CEC_ITConfig(CEC_IT_TXACKE|CEC_IT_TXERR|CEC_IT_ARBLST,ENABLE);

  /* Activate CEC interrupts associated to the set of RX error */
  CEC_ITConfig(CEC_IT_RXACKE|CEC_IT_LBPE|CEC_IT_SBPE|CEC_IT_BRE,ENABLE);

  /* Enable CEC */
  CEC_Cmd(ENABLE);
}
Ejemplo n.º 2
0
/**
  * @brief  Configures the CEC peripheral.
  * @param  None
  * @retval None
  */
void CEC_Config(void)
{
  CEC_InitTypeDef CEC_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  GPIO_InitTypeDef GPIO_InitStructure;

  /* Enable CEC clocks */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_CEC , ENABLE);

  /* Enable CEC_LINE_GPIO clocks */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);

  /* Configure CEC_LINE_GPIO as Output open drain */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOB, &GPIO_InitStructure);

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

  /* Configure CEC */
  CEC_InitStructure.CEC_SignalFreeTime = CEC_SignalFreeTime_Standard;
  CEC_InitStructure.CEC_RxTolerance = CEC_RxTolerance_Standard;
  CEC_InitStructure.CEC_StopReception = CEC_StopReception_Off;
  CEC_InitStructure.CEC_BitRisingError = CEC_BitRisingError_Off;
  CEC_InitStructure.CEC_LongBitPeriodError = CEC_LongBitPeriodError_Off;
  CEC_InitStructure.CEC_BRDNoGen = CEC_BRDNoGen_Off;
  CEC_InitStructure.CEC_SFTOption = CEC_SFTOption_Off;
  CEC_Init(&CEC_InitStructure);

  /* Set the CEC initiator address */
  CEC_OwnAddressConfig(MyLogicalAddress1);

#if defined (DEVICE_2)
  /* Set the CEC initiator address 2 */
  CEC_OwnAddressConfig(MyLogicalAddress2);
#endif 

#if defined (DEVICE_1)
  /* Activate CEC interrupts associated to the set of TX flags */
  CEC_ITConfig(CEC_IT_TXEND|CEC_IT_TXBR,ENABLE);

  /* Activate CEC interrupts associated to the set of TX error */
  CEC_ITConfig(CEC_IT_TXACKE|CEC_IT_TXERR|CEC_IT_TXUDR|CEC_IT_ARBLST,ENABLE);

#elif defined (DEVICE_2)
  /* Activate CEC interrupts associated to the set of RX flags */
  CEC_ITConfig(CEC_IT_RXEND|CEC_IT_RXBR,ENABLE);

  /* Activate CEC interrupts associated to the set of RX error */
  CEC_ITConfig(CEC_IT_RXACKE|CEC_IT_LBPE|CEC_IT_SBPE|CEC_IT_BRE|CEC_IT_RXOVR,ENABLE);
#endif
  /* Enable CEC */
  CEC_Cmd(ENABLE);
}
Ejemplo n.º 3
0
/**
  * @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)
  {
  }
}