/**
* @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);
}
/**
* @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);
}
/**
* @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)
{
}
}