eMBException
eMBMasterFuncReadHoldingRegister( UCHAR * pucFrame, USHORT * usLen )
{
UCHAR *ucMBFrame;
USHORT usRegAddress;
USHORT usRegCount;
eMBException eStatus = MB_EX_NONE;
eMBErrorCode eRegStatus;
/* If this request is broadcast, and it's read mode. This request don't need execute. */
if ( xMBMasterRequestIsBroadcast() )
{
eStatus = MB_EX_NONE;
}
else if( *usLen >= MB_PDU_SIZE_MIN + MB_PDU_FUNC_READ_SIZE_MIN )
{
vMBMasterGetPDUSndBuf(&ucMBFrame);
usRegAddress = ( USHORT )( ucMBFrame[MB_PDU_REQ_READ_ADDR_OFF] << 8 );
usRegAddress |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READ_ADDR_OFF + 1] );
usRegAddress++;
usRegCount = ( USHORT )( ucMBFrame[MB_PDU_REQ_READ_REGCNT_OFF] << 8 );
usRegCount |= ( USHORT )( ucMBFrame[MB_PDU_REQ_READ_REGCNT_OFF + 1] );
/* Check if the number of registers to read is valid. If not
* return Modbus illegal data value exception.
*/
if( ( usRegCount >= 1 ) && ( 2 * usRegCount == pucFrame[MB_PDU_FUNC_READ_BYTECNT_OFF] ) )
{
/* Make callback to fill the buffer. */
eRegStatus = eMBMasterRegHoldingCB( &pucFrame[MB_PDU_FUNC_READ_VALUES_OFF], usRegAddress, usRegCount, MB_REG_READ );
if(eMBMasterGetErrorType() == EV_ERROR_RESPOND_TIMEOUT) nReqTimeOut++;
vMBMasterSetErrorType(EV_NO_ERROR);
populate(&list_RTC, (DeviceElement){(uint32_t)ucMBMasterGetDestAddress(), "RTC", CONNECTED, nReqTimeOut, nReqs, 3, usRegAddress, usRegCount, 0, 0});
/* If an error occured convert it into a Modbus exception. */
if( eRegStatus != MB_ENOERR )
{
eStatus = prveMBError2Exception( eRegStatus );
populate(&list_RTC, (DeviceElement){(uint32_t)ucMBMasterGetDestAddress(), "RTC(E)", CONNECTIONLESS, nReqTimeOut, nReqs, 3, usRegAddress, usRegCount, 0, 0});
}
}
else
{
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
populate(&list_RTC, (DeviceElement){(uint32_t)ucMBMasterGetDestAddress(), "RTC(IDV)", CONNECTIONLESS, nReqTimeOut, nReqs, 3, usRegAddress, usRegCount, 0, 0});
}
}
else
{
/* Can't be a valid request because the length is incorrect. */
eStatus = MB_EX_ILLEGAL_DATA_VALUE;
}
return eStatus;
}
//******************************输入寄存器回调函数**********************************
//函数定义: eMBErrorCode eMBMasterRegInputCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs )
//描 述：输入寄存器相关的功能（读、连续读）
//入口参数：pucRegBuffer : 回调函数将Modbus寄存器的当前值写入的缓冲区
// usAddress : 寄存器的起始地址，输入寄存器的地址范围是1-65535。
// usNRegs : 寄存器数量
//出口参数：eMBErrorCode : 这个函数将返回的错误码
//备 注：Editor：Armink 2013-11-25 Company: BXXJS
//**********************************************************************************
eMBErrorCode
eMBMasterRegInputCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs )
{
eMBErrorCode eStatus = MB_ENOERR;
USHORT iRegIndex;
USHORT * pusRegInputBuf;
USHORT REG_INPUT_START;
USHORT REG_INPUT_NREGS;
USHORT usRegInStart;
pusRegInputBuf = usMRegInBuf[ucMBMasterGetDestAddress() - 1];
REG_INPUT_START = M_REG_INPUT_START;
REG_INPUT_NREGS = M_REG_INPUT_NREGS;
usRegInStart = usMRegInStart;
usAddress--;//FreeModbus功能函数中已经加1，为保证与缓冲区首地址一致，故减1
if( ( usAddress >= REG_INPUT_START )
&& ( usAddress + usNRegs <= REG_INPUT_START + REG_INPUT_NREGS ) )
{
iRegIndex = usAddress - usRegInStart;
while( usNRegs > 0 )
{
pusRegInputBuf[iRegIndex] = *pucRegBuffer++ << 8;
pusRegInputBuf[iRegIndex] |= *pucRegBuffer++;
iRegIndex++;
usNRegs--;
}
}
else
{
eStatus = MB_ENOREG;
}
return eStatus;
}
//******************************保持寄存器回调函数**********************************
//函数定义: eMBErrorCode eMBMasterRegHoldingCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs, eMBRegisterMode eMode )
//描 述：保持寄存器相关的功能（读、连续读、写、连续写）
//入口参数：pucRegBuffer : 如果需要更新用户寄存器数值，这个缓冲区必须指向新的寄存器数值。
// 如果协议栈想知道当前的数值，回调函数必须将当前值写入这个缓冲区
// usAddress : 寄存器的起始地址。
// usNRegs : 寄存器数量
// eMode : 如果该参数为eMBRegisterMode::MB_REG_WRITE，用户的应用数值将从pucRegBuffer中得到更新。
// 如果该参数为eMBRegisterMode::MB_REG_READ，用户需要将当前的应用数据存储在pucRegBuffer中
//出口参数：eMBErrorCode : 这个函数将返回的错误码
//备 注：Editor：Armink 2013-11-25 Company: BXXJS
//**********************************************************************************
eMBErrorCode
eMBMasterRegHoldingCB( UCHAR * pucRegBuffer, USHORT usAddress, USHORT usNRegs, eMBRegisterMode eMode )
{
eMBErrorCode eStatus = MB_ENOERR;
USHORT iRegIndex;
USHORT * pusRegHoldingBuf;
USHORT REG_HOLDING_START;
USHORT REG_HOLDING_NREGS;
USHORT usRegHoldStart;
pusRegHoldingBuf = usMRegHoldBuf[ucMBMasterGetDestAddress() - 1];
REG_HOLDING_START = M_REG_HOLDING_START;
REG_HOLDING_NREGS = M_REG_HOLDING_NREGS;
usRegHoldStart = usMRegHoldStart;
//If mode is read,the master will wirte the received date to bufffer.
eMode = MB_REG_WRITE;
usAddress--;//FreeModbus功能函数中已经加1，为保证与缓冲区首地址一致，故减1
if( ( usAddress >= REG_HOLDING_START ) &&
( usAddress + usNRegs <= REG_HOLDING_START + REG_HOLDING_NREGS ) )
{
iRegIndex = usAddress - usRegHoldStart;
switch ( eMode )
{
/* Pass current register values to the protocol stack. */
case MB_REG_READ:
while( usNRegs > 0 )
{
*pucRegBuffer++ = ( unsigned char )( pusRegHoldingBuf[iRegIndex] >> 8 );
*pucRegBuffer++ = ( unsigned char )( pusRegHoldingBuf[iRegIndex] & 0xFF );
iRegIndex++;
usNRegs--;
}
break;
/* Update current register values with new values from the
* protocol stack. */
case MB_REG_WRITE:
while( usNRegs > 0 )
{
pusRegHoldingBuf[iRegIndex] = *pucRegBuffer++ << 8;
pusRegHoldingBuf[iRegIndex] |= *pucRegBuffer++;
iRegIndex++;
usNRegs--;
}
break;
}
}
eMBErrorCode
eMBMasterPoll( void )
{
static UCHAR *ucMBFrame;
static UCHAR ucRcvAddress;
static UCHAR ucFunctionCode;
static USHORT usLength;
static eMBException eException;
// int i;
eMBErrorCode eStatus = MB_ENOERR;
eMBMasterEventType eEvent;
/* Check if the protocol stack is ready. */
if( eMBState != STATE_ENABLED )
{
return MB_EILLSTATE;
}
/* Check if there is a event available. If not return control to caller.
* Otherwise we will handle the event. */
if( xMBMasterPortEventGet( &eEvent ) == TRUE )
{
switch ( eEvent )
{
case EV_MASTER_READY:
break;
case EV_MASTER_FRAME_RECEIVED:
eStatus = peMBMasterFrameReceiveCur( &ucRcvAddress, &ucMBFrame, &usLength );
if ( eStatus == MB_ENOERR )
{
( void ) xMBMasterPortEventPost( EV_MASTER_EXECUTE );
}
else
{
( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS );
}
#if 0
/* Check if the frame is for us. If not ,send an error process event. */
if ( ( eStatus == MB_ENOERR ) && ( ucRcvAddress == ucMBMasterGetDestAddress() ) )
{
( void ) xMBMasterPortEventPost( EV_MASTER_EXECUTE );
}
else
{
( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS );
}
#endif
break;
case EV_MASTER_EXECUTE:
//接受到了一帧RTU 数据
//Mb2TcpBuff[256];
if(usLength<256)
{
Mb2TcpLenth=usLength;//更新接受到的数据长度，准备启动TCP发送
Mb2TcpBuff[0]=0xFF;
Mb2TcpBuff[1]=0x55;
Mb2TcpBuff[2]=Statues_MB;
Mb2TcpBuff[3]=UID_STM32[0];
Mb2TcpBuff[4]=UID_STM32[1];
Mb2TcpBuff[5]=UID_STM32[2];
memcpy(&Mb2TcpBuff[6],ucMBFrame,Mb2TcpLenth);//数据复制进TCP发送buf中
Mb2TcpBuff[Mb2TcpLenth+6]=0x24;
Mb2TcpBuff[Mb2TcpLenth+6+1]=0x0d;
Mb2TcpBuff[Mb2TcpLenth+6+2]=0x0a;
Mb2TcpLenth+=9;
}
eException = MB_EX_ILLEGAL_FUNCTION;
#if 0
ucFunctionCode = ucMBFrame[MB_PDU_FUNC_OFF];
eException = MB_EX_ILLEGAL_FUNCTION;
for( i = 0; i < MB_FUNC_HANDLERS_MAX; i++ )
{
// No more function handlers registered. Abort.
if( xMasterFuncHandlers[i].ucFunctionCode == 0 )
{
break;
}
else if( xMasterFuncHandlers[i].ucFunctionCode == ucFunctionCode )
{
vMBMasterSetCBRunInMasterMode(TRUE);
eException = xMasterFuncHandlers[i].pxHandler( ucMBFrame, &usLength );
vMBMasterSetCBRunInMasterMode(FALSE);
break;
}
}
/* If receive frame has exception .The receive function code highest bit is 1.*/
if(ucFunctionCode >> 7) eException = (eMBException)ucMBFrame[MB_PDU_DATA_OFF];
/* If master has exception ,Master will send error process.Otherwise the Master is idle.*/
if (eException != MB_EX_NONE) ( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS );
else vMBMasterSetIsBusy( FALSE );
#endif
break;
case EV_MASTER_FRAME_SENT:
/* Master is busy now. */
vMBMasterSetIsBusy( TRUE );
vMBMasterGetPDUSndBuf( &ucMBFrame );
eStatus = peMBMasterFrameSendCur( ucMBMasterGetDestAddress(), ucMBFrame, ucMBMasterGetPDUSndLength() );
break;
case EV_MASTER_ERROR_PROCESS:
vMBMasterSetIsBusy( FALSE );
break;
}
}
return MB_ENOERR;
}
eMBErrorCode
eMBMasterPoll( void )
{
static UCHAR *ucMBFrame;
static UCHAR ucRcvAddress;
static UCHAR ucFunctionCode;
static USHORT usLength;
static eMBException eException;
int i , j;
eMBErrorCode eStatus = MB_ENOERR;
eMBMasterEventType eEvent;
eMBMasterErrorEventType errorType;
/* Check if the protocol stack is ready. */
if( eMBState != STATE_ENABLED )
{
return MB_EILLSTATE;
}
/* Check if there is a event available. If not return control to caller.
* Otherwise we will handle the event. */
if( xMBMasterPortEventGet( &eEvent ) == TRUE )
{
switch ( eEvent )
{
case EV_MASTER_READY:
break;
case EV_MASTER_FRAME_RECEIVED:
eStatus = peMBMasterFrameReceiveCur( &ucRcvAddress, &ucMBFrame, &usLength );
/* Check if the frame is for us. If not ,send an error process event. */
if ( ( eStatus == MB_ENOERR ) && ( ucRcvAddress == ucMBMasterGetDestAddress() ) )
{
( void ) xMBMasterPortEventPost( EV_MASTER_EXECUTE );
}
else
{
vMBMasterSetErrorType(EV_ERROR_RECEIVE_DATA);
( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS );
}
break;
case EV_MASTER_EXECUTE:
ucFunctionCode = ucMBFrame[MB_PDU_FUNC_OFF];
eException = MB_EX_ILLEGAL_FUNCTION;
/* If receive frame has exception .The receive function code highest bit is 1.*/
if(ucFunctionCode >> 7) {
eException = (eMBException)ucMBFrame[MB_PDU_DATA_OFF];
}
else
{
for (i = 0; i < MB_FUNC_HANDLERS_MAX; i++)
{
/* No more function handlers registered. Abort. */
if (xMasterFuncHandlers[i].ucFunctionCode == 0) {
break;
}
else if (xMasterFuncHandlers[i].ucFunctionCode == ucFunctionCode) {
vMBMasterSetCBRunInMasterMode(TRUE);
/* If master request is broadcast,
* the master need execute function for all slave.
*/
if ( xMBMasterRequestIsBroadcast() ) {
usLength = usMBMasterGetPDUSndLength();
for(j = 1; j <= MB_MASTER_TOTAL_SLAVE_NUM; j++){
vMBMasterSetDestAddress(j);
eException = xMasterFuncHandlers[i].pxHandler(ucMBFrame, &usLength);
}
}
else {
eException = xMasterFuncHandlers[i].pxHandler(ucMBFrame, &usLength);
}
vMBMasterSetCBRunInMasterMode(FALSE);
break;
}
}
}
/* If master has exception ,Master will send error process.Otherwise the Master is idle.*/
if (eException != MB_EX_NONE) {
vMBMasterSetErrorType(EV_ERROR_EXECUTE_FUNCTION);
( void ) xMBMasterPortEventPost( EV_MASTER_ERROR_PROCESS );
}
else {
vMBMasterCBRequestScuuess( ucMBMasterGetDestAddress());
vMBMasterRunResRelease( );
}
break;
case EV_MASTER_FRAME_SENT:
/* Master is busy now. */
vMBMasterGetPDUSndBuf( &ucMBFrame );
eStatus = peMBMasterFrameSendCur( ucMBMasterGetDestAddress(), ucMBFrame, usMBMasterGetPDUSndLength() );
break;
case EV_MASTER_ERROR_PROCESS:
/* Execute specified error process callback function. */
errorType = eMBMasterGetErrorType();
vMBMasterGetPDUSndBuf( &ucMBFrame );
switch (errorType) {
case EV_ERROR_RESPOND_TIMEOUT:
vMBMasterErrorCBRespondTimeout(ucMBMasterGetDestAddress(),
ucMBFrame, usMBMasterGetPDUSndLength());
break;
case EV_ERROR_RECEIVE_DATA:
vMBMasterErrorCBReceiveData(ucMBMasterGetDestAddress(),
ucMBFrame, usMBMasterGetPDUSndLength());
break;
case EV_ERROR_EXECUTE_FUNCTION:
vMBMasterErrorCBExecuteFunction(ucMBMasterGetDestAddress(),
ucMBFrame, usMBMasterGetPDUSndLength());
break;
}
vMBMasterRunResRelease();
break;
}
}
