基于STM32的Modbus/RTU从站，完成01与03功能命令

静静地主宰 · 发表于 2015-6-13 11:41:05

各位大神，小弟刚入门STM32，在做标题中的实验，用PC做上位机，战舰STM32做下位机，用Modbus调试精灵验证，希望各位给以指导，最好能有源代码。重点是通信过程消息帧的接收，中断服务程序的编写。谢谢了！

正点原子 · 发表于 2015-6-13 18:40:23

帮顶。。。。

静静地主宰 · 发表于 2015-6-17 17:45:41

大家帮忙看一下，这是我的

[mw_shl_code=c,true]void USART1_IRQHandler(void) //?®??1????·??????ò { if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //???????? { Rcv_Data=USART_ReceiveData(USART1); //???????????????? HaveMes=1;//±í?????????????? if(Comu_Busy==0)//?????????????????????????? { TIM_Cmd(TIM3,DISABLE); //??±??¨?±?÷2???¨???®?????????????????¨?±?÷ TIM_SetCounter(TIM3,0); //?????÷???? if((Tim_Out==1)&&(Rcv_Data==Mod_Id))//?????????±??????3.5??×?·??????±??????×?????×????????????????ò???????????? { Rcv_Complete=0;//±í???????????????? Rcv_Num=0;//?????????????????? Rcv_Num++;//???±???????? } if((0==Tim_Out)&&(0==Rcv_Complete))//???????????????????????????? { if(Rcv_Num<10) { Rcv_Buffer[Rcv_Num+1]=Rcv_Data;//??????·?????????×é?? Rcv_Num++;//???±???????? } else { Rcv_Complete=1; Comu_Busy=1; Rcv_Buffer[0]=Rcv_Num; *(PointToSendBuf+2)=*(PointToRcvBuf+2);//?????????? ErrorHandle(6,PointToSendBuf);//±í????????×??????¨???ú?è±??????© Rcv_Num=0; } } Tim_Out=0; TIM_Cmd(TIM3, ENABLE);//?????¨?±?÷??????????4.5ms???±?¨????°?×?·???±????????© } } if(USART_GetITStatus(USART1,USART_IT_TC)!=RESET) //·??????? { Send_Data=*(PointToSendBuf+Send_Num); USART_SendData(USART1,Send_Data); Send_Num++; if(Send_Num>(*PointToSendBuf))//·????????ê?? { Comu_Busy=0; *PointToSendBuf=0; Rcv_Num=0; Send_Num=1; //????????·??? USART_ITConfig(USART1, USART_IT_TC, DISABLE);//??±?????·??????? } } } #endif void MessageHandle(u8 *pointer_in,u8 *pointer_out) { u16 CalKey;//?????????????é?? u16 RcvKey;//???????????é?? HaveMes=0;//?????????? //???????????????é?? RcvKey=(u16)*(pointer_in+(*pointer_in-1)); RcvKey=RcvKey<<8; RcvKey=RcvKey|(u16)*(pointer_in+(*pointer_in)); CalKey=CRC16(pointer_in+1,*pointer_in-2); if(CalKey==RcvKey) { switch(*(pointer_in+2))//??????×??????????? { case 0x01:ReadOutputBit(pointer_in,pointer_out);//?????????? break; case 0x03:ReadHoldingReg(pointer_in,pointer_out);//??±????????÷ break; default: { *(pointer_out+2)=*(pointer_in+2);//?????????? ErrorHandle(1,pointer_out);//???????í?ó } break; } } else { Comu_Busy=0; } } [/mw_shl_code]

工程代码，编程实现了，为何用modbus调试精灵实现不了呢？