/**
******************************************************************************
* @file CEC/DataExchangeInterrupt/stm32f10x_it.c
* @author MCD Application Team
* @version V3.5.0
* @date 08-April-2011
* @brief Main Interrupt Service Routines.
* This file provides template for all exceptions handler and
* peripherals interrupt service routine.
******************************************************************************
* @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.
*
*
© COPYRIGHT 2011 STMicroelectronics
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_it.h"
#include "stm32_eval.h"
/** @addtogroup STM32F10x_StdPeriph_Examples
* @{
*/
/** @addtogroup CEC_DataExchangeInterrupt
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Receive buffer */
uint8_t ReceiveBuffer[10];
/* Transmit buffer */
uint8_t TransmitBuffer[10] = {0xDF, 0x12, 0xD3, 0x56, 0x97,
0xA1, 0xEC, 0x7B, 0x4F, 0x22};
__IO uint8_t ReceivedFrame = 0;
uint8_t send_inc = 0, rcv_inc = 0;
uint8_t HeaderBlockValueToSend = 0;
uint8_t InitiatorAddress = 0;
uint8_t TransErrorCode = 0;
uint8_t RecepErrorCode = 0;
extern uint8_t ByteNumber;
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/******************************************************************************/
/* Cortex-M3 Processor Exceptions Handlers */
/******************************************************************************/
/**
* @brief This function handles NMI exception.
* @param None
* @retval None
*/
void NMI_Handler(void)
{
}
/**
* @brief This function handles Hard Fault exception.
* @param None
* @retval None
*/
void HardFault_Handler(void)
{
/* Go to infinite loop when Hard Fault exception occurs */
while (1)
{
}
}
/**
* @brief This function handles Memory Manage exception.
* @param None
* @retval None
*/
void MemManage_Handler(void)
{
/* Go to infinite loop when Memory Manage exception occurs */
while (1)
{
}
}
/**
* @brief This function handles Bus Fault exception.
* @param None
* @retval None
*/
void BusFault_Handler(void)
{
/* Go to infinite loop when Bus Fault exception occurs */
while (1)
{
}
}
/**
* @brief This function handles Usage Fault exception.
* @param None
* @retval None
*/
void UsageFault_Handler(void)
{
/* Go to infinite loop when Usage Fault exception occurs */
while (1)
{
}
}
/**
* @brief This function handles SVCall exception.
* @param None
* @retval None
*/
void SVC_Handler(void)
{
}
/**
* @brief This function handles Debug Monitor exception.
* @param None
* @retval None
*/
void DebugMon_Handler(void)
{
}
/**
* @brief This function handles PendSVC exception.
* @param None
* @retval None
*/
void PendSV_Handler(void)
{
}
/**
* @brief This function handles SysTick Handler.
* @param None
* @retval None
*/
void SysTick_Handler(void)
{
}
/**
* @brief This function handles EXTI Lines 9 to 5 interrupts requests.
* @param None
* @retval None
*/
void EXTI9_5_IRQHandler(void)
{
/* Generate rising edge on Key button to detect when we push key button to initiate
transmission */
if(EXTI_GetITStatus(KEY_BUTTON_EXTI_LINE) != RESET)
{
/* Turn on LED3 */
STM_EVAL_LEDOn(LED3);
/* Build the Header block to send */
HeaderBlockValueToSend = (((MY_DEVICE_ADDRESS & 0xF) << 4) | (FOLLOWER & 0xF));
/* Write single Data in the TX Buffer to Transmit through the CEC peripheral */
CEC_SendDataByte(HeaderBlockValueToSend);
/* Initiate Message Transmission */
CEC_StartOfMessage();
/* Clear Key Button EXTI line pending bit */
EXTI_ClearITPendingBit(KEY_BUTTON_EXTI_LINE);
}
}
/**
* @brief This function handles CEC global interrupt request.
* @param None
* @retval None
*/
void CEC_IRQHandler(void)
{
/* Turn on LED4 */
STM_EVAL_LEDOn(LED4);
/********************** Reception *********************************************/
/* Check if a reception error occurred */
if (CEC_GetFlagStatus(CEC_FLAG_RERR))
{
/* Set receive status bit (Error) */
RecepErrorCode = CEC->ESR;
CEC_ClearFlag(CEC_FLAG_RERR | CEC_FLAG_RSOM | CEC_FLAG_REOM | CEC_FLAG_RBTF);
}
else if (CEC_GetFlagStatus(CEC_FLAG_RBTF))
{
/* Check if the byte received is the last one of the message */
if (CEC_GetFlagStatus(CEC_FLAG_REOM))
{
ReceiveBuffer[rcv_inc] = CEC_ReceiveDataByte();
rcv_inc++;
ReceivedFrame = 1;
}
/* Check if the byte received is a Header */
else if (CEC_GetFlagStatus(CEC_FLAG_RSOM))
{
InitiatorAddress = ((CEC_ReceiveDataByte() >> 4) & 0x0F);
rcv_inc = 0;
}
/* Receive each byte except header in the reception buffer */
else
{
ReceiveBuffer[rcv_inc] = CEC_ReceiveDataByte();
rcv_inc++;
}
/* Clear all reception flags */
CEC_ClearFlag(CEC_FLAG_RSOM | CEC_FLAG_REOM | CEC_FLAG_RBTF);
}
/********************** Transmission ******************************************/
/* Check if a transmission error occurred */
if (CEC_GetFlagStatus(CEC_FLAG_TERR))
{
TransErrorCode = CEC->ESR;
CEC_ClearFlag(CEC_FLAG_TBTRF | CEC_FLAG_TERR);
}
/* Check if end of message bit is set in the data to be transmitted */
else if (CEC_GetFlagStatus(CEC_FLAG_TEOM))
{
CEC_ClearFlag(CEC_FLAG_TBTRF | CEC_FLAG_RBTF);
CEC_EndOfMessageCmd(DISABLE);
}
/* Check if data byte has been sent */
else if (CEC_GetFlagStatus(CEC_FLAG_TBTRF))
{
/* Set EOM bit if the byte to be transmitted is the last one of the Transmit Buffer */
if (send_inc == (ByteNumber - 1))
{
CEC_SendDataByte(TransmitBuffer[send_inc]);
send_inc++;
CEC_ClearFlag(CEC_FLAG_TBTRF);
CEC_EndOfMessageCmd(ENABLE);
}
else
{
/* Put the byte in the TX Buffer */
CEC_SendDataByte(TransmitBuffer[send_inc]);
send_inc++;
CEC_ClearFlag(CEC_FLAG_TBTRF);
}
}
}
/******************************************************************************/
/* STM32F10x Peripherals Interrupt Handlers */
/* Add here the Interrupt Handler for the used peripheral(s) (PPP), for the */
/* available peripheral interrupt handler's name please refer to the startup */
/* file (startup_stm32f10x_xx.s). */
/******************************************************************************/
/**
* @brief This function handles PPP interrupt request.
* @param None
* @retval None
*/
/*void PPP_IRQHandler(void)
{
}*/
/**
* @}
*/
/**
* @}
*/
/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/