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freemodbus函数调用关系

2020-08-07 10:02:54   26  举报

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freemodbus的函数调用

freemodbus

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eMBInit(eMBMode eMode, UCHAR ucSlaveAddress, UCHAR ucPort, ULONG ulBaudRate, eMBParity eParity )

MB_RTU

pvMBFrameStartCur = eMBRTUStart

pvMBFrameStopCur = eMBRTUStop

peMBFrameSendCur = eMBRTUSend

peMBFrameReceiveCur = eMBRTUReceive

pvMBFrameCloseCur = MB_PORT_HAS_CLOSE ? vMBPortClose : NULL;

pxMBFrameCBByteReceived = xMBRTUReceiveFSM;

pxMBFrameCBTransmitterEmpty = xMBRTUTransmitFSM;

pxMBPortCBTimerExpired = xMBRTUTimerT35Expired;

eMBRTUInit( ucMBAddress, ucPort, ulBaudRate, eParity ); //串口初始化

xMBPortEventInit( )

xEventInQueue = FALSE;

return TRUE;

eMBCurrentMode = eMode;

eMBState = STATE_DISABLED;

eMBEnable()

pvMBFrameStartCur( );

eMBRTUStart

eRcvState = STATE_RX_INIT;

vMBPortSerialEnable( TRUE, FALSE );

vMBPortTimersEnable( );

__HAL_TIM_CLEAR_IT(&htim4,TIM_IT_UPDATE);

__HAL_TIM_SetCounter(&htim4,0);//这里一定要清零计数器

HAL_TIM_Base_Start_IT(&htim4);

eMBState = STATE_ENABLED;

eMBPoll()

xMBPortEventGet( &eEvent ) 

xEventHappened = FALSE; if( xEventInQueue )     *eEvent = eQueuedEvent;     xEventInQueue = FALSE;     xEventHappened = TRUE; return xEventHappened;

if(xMBPortEventGet== TRUE))

case EV_READY:

break；

case EV_FRAME_RECEIVED:

eStatus = peMBFrameReceiveCur()

eMBRTUReceive

BOOL xFrameReceived = FALSE;

eMBErrorCode eStatus = MB_ENOERR;

assert( usRcvBufferPos < MB_SER_PDU_SIZE_MAX );

if( ( usRcvBufferPos >= MB_SER_PDU_SIZE_MIN ) && ( usMBCRC16( ( UCHAR * ) ucRTUBuf, usRcvBufferPos ) == 0 ) )

*pucRcvAddress = ucRTUBuf[MB_SER_PDU_ADDR_OFF];

*pusLength = ( USHORT )( usRcvBufferPos - MB_SER_PDU_PDU_OFF - MB_SER_PDU_SIZE_CRC );

*pucFrame = ( UCHAR * ) & ucRTUBuf[MB_SER_PDU_PDU_OFF];

xFrameReceived = TRUE;

else

eStatus = MB_EIO;

return eStatus;

if( eStatus == MB_ENOERR )

( void )xMBPortEventPost( EV_EXECUTE );

case EV_EXECUTE:

ucFunctionCode = ucMBFrame[MB_PDU_FUNC_OFF];

eException = MB_EX_ILLEGAL_FUNCTION;

for( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ )

if( xFuncHandlers[i].ucFunctionCode == 0 )

break;

else if( xFuncHandlers[i].ucFunctionCode == ucFunctionCode )

eException = xFuncHandlers[i].pxHandler( ucMBFrame, &usLength );

break;

if( ucRcvAddress != MB_ADDRESS_BROADCAST )

if( eException != MB_EX_NONE )

eException != MB_EX_NONE

usLength = 0;

ucMBFrame[usLength++] = ( UCHAR )( ucFunctionCode | MB_FUNC_ERROR );

ucMBFrame[usLength++] = eException;

if( ( eMBCurrentMode == MB_ASCII ) && MB_ASCII_TIMEOUT_WAIT_BEFORE_SEND_MS )

vMBPortTimersDelay( MB_ASCII_TIMEOUT_WAIT_BEFORE_SEND_MS );

eStatus = peMBFrameSendCur( ucMBAddress, ucMBFrame, usLength );

eMBRTUSend

if( eRcvState == STATE_RX_IDLE )

/* Now copy the Modbus-PDU into the Modbus-Serial-Line-PDU. */ pucSndBufferCur[MB_SER_PDU_ADDR_OFF] = ucSlaveAddress; usSndBufferCount += usLength; /* Calculate CRC16 checksum for Modbus-Serial-Line-PDU. */ usCRC16 = usMBCRC16( ( UCHAR * ) pucSndBufferCur, usSndBufferCount ); ucRTUBuf[usSndBufferCount++] = ( UCHAR )( usCRC16 & 0xFF ); ucRTUBuf[usSndBufferCount++] = ( UCHAR )( usCRC16 >> 8 );

/* Activate the transmitter. */ eSndState = STATE_TX_XMIT;

vMBPortSerialEnable( FALSE, TRUE );

else

eStatus = MB_EIO;

break;

case EV_FRAME_SENT:

break;

return MB_ENOERR;

定时器中断处理

HAL_TIM_PeriodElapsedCallback

prvvTIMERExpiredISR();

pxMBPortCBTimerExpired