STM32F107串口1通訊modbus學(xué)習(xí)示例

1、/TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx*1*1*1*1*1*1*1*1*1*1*TxTxTxTxTxTxTxTxTxTx*文件名稱:*功能描述:STM32F107串口1通訊*參數(shù):None*返回值:None*作者:汪仁海*日期:2013年1月28日*修改人:*日期:*TxTxTxTxTxTxTxTxTxTxTxTxTxTx

2、TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx*1*1*1*1*1*1*1*1*1*1*/TxTxTxTxTxTxTxTxTxTx/#includemain.h#defineUSART1_USART1_Addr0 x01定義設(shè)備地址#defineUSART1_GetDataNum50/定義接收數(shù)據(jù)最大長度#defineUSART1_OutDataNum50/定義發(fā)送數(shù)據(jù)最大長度#de

3、fineUSART1_RTU_03ReadOrder0 x04/定義mobusRTU03讀指令#defineUSART1_RTU_04ReadOrder0 x03/定義mobusRTU04讀指令#defineUSART1_RTU_04WriteOrder0 x10定義mobusRTU04寫指令，在定義地址寄存器內(nèi)操作#defineUSART1_TIM2_COUNT3/串口接收數(shù)據(jù)超計數(shù)常數(shù)u8USART1_GetDataUSART1_GetDataNum;定義接收數(shù)組u8USART1_GetDataCpyeUSART1_GetDataNum;定義接收數(shù)組有效數(shù)據(jù)暫存區(qū)u8USART1_OutD

4、ataUSART1_OutDataNum;定義發(fā)送數(shù)組u16USART1_MobusWordUSART1_MobusWordNum;/MOBUSRTU寄存器16bit字節(jié)數(shù)組u8USART1_GetDataCount;/串口接收數(shù)據(jù)個數(shù)u8USART1_GetDataCountCpye;串口接收數(shù)據(jù)個數(shù)轉(zhuǎn)存區(qū)u8USART1_OutDataCount;串口發(fā)送數(shù)據(jù)個數(shù)u8USART1_GetDataFlag;/串口接收數(shù)據(jù)繼續(xù)有效標識符,0為無效，大于0為有效u16USART1_GetMobusAddr;串口接收到指令操作地址u16USART1_GetMobusAddrCpye;串口接收到指令

5、操作地址u8USART1_GetMobusOrder;串口接收到指令操作命令u8USART1_GetMobusOrderCpye;串口接收到指令操作命令u8USART1_GetMobusLen;串口接收到指令操作數(shù)據(jù)長度u8USART1_GetMobusOrderFlag;串口接收到指令操作數(shù)據(jù)是否有效標記符/TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx/*對外輸入輸出接口

6、函數(shù)部分*/u8USARTl_GetMobusOrder_Flag(void)串口接收到指令操作數(shù)據(jù)是否有效標記符returnUSARTl_GetMobusOrderFlag;voidUSART1_GetMobusOrder_SetFlag(u8ch)/設(shè)置串口指令操作數(shù)據(jù)標記符USART1_GetMobusOrderFlag=ch;u16ReadMobusWord(u16addr)/讀Mobus數(shù)組指定地址的數(shù)據(jù)if(addr=USART1_MobusWordAddr)&(addr=USART1_MobusWordAddr)&(addr(USART1_MobusWordAddr+USART1

7、_MobusWordNum)USART1_MobusWordaddr-USART1_MobusWordAddr=data;return1;elsereturn0;/TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx/*初始化函數(shù)*/*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*

8、1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*/TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx/*數(shù)據(jù)初始化*/voidUSART1_InitData(void)u16i=0;for(i=0;iUSART1_GetDataNum;i+)USART1_GetDatai=0;USART1_GetDataCp

9、yei=0;for(i=0;iUSART1_OutDataNum;i+)USART1_OutDatai=0;for(i=0;iUSART1_MobusWordNum;i+)USART1_MobusWordi=i;/USART1_MobusWordi=0;USARTl_MobusWord0=USARTl_USARTl_Addr;起始寄存器為該設(shè)備的地址USARTl_GetDataCount=0;串口接收數(shù)據(jù)個數(shù)USART1_GetDataCountCpye=0;串口接收數(shù)據(jù)個數(shù)轉(zhuǎn)存區(qū)USART1_GetDataFlag=0;串口接收數(shù)據(jù)繼續(xù)有效標識符USART1_GetMobusLen=0;串口

10、接收到指令操作數(shù)據(jù)長度/*串口過時接收復(fù)位函數(shù)*/voidUSART1_IsReset(void)串口過時接收復(fù)位函數(shù)if(USART1_GetDataFlag1)USART1_GetDataCount=0;串口接收數(shù)據(jù)個數(shù)清零elseUSART1_GetDataFlag-;/串口接收數(shù)據(jù)標識符減/TxTxTxTxTx/*指令有效判斷函數(shù)*/*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1

11、*1*1*1*/TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx/*返回指定數(shù)值指定長度字符串的CRC值*/u16GetCRC16(u8ch,u16len)/返回指定數(shù)值指定長度字符串的CRC值u16i,j;u16crc=0 xFFFF;if(len=0)len=1;for(j=0;jlen;j+)crcA=chj;for(i=0;i=1;crcA=0 xA001;elsecr

12、c=1;return(crc);/*判斷指定數(shù)值，指定長度的最后兩位CRC值是否正確*/ul6IsCRC16(u8ch,ul6len)/判斷指定數(shù)值，指定長度的最后兩位CRC值是否正確u16a,b;b=0 x0000;a=GetCRC16(ch,len-2);b=(b|chlen-1)8)|chlen-2;if(a=b)return1;elsereturn0;u8IsGetCharAddr(void)/判斷接收到得指令地址是否有效u8flagAddr=0,flagCRC=0;u16GetCharAddr=0 x0000;GetCharAddr=USART1_GetDataCpye2;GetCh

13、arAddr=(GetCharAddr=USART1_MobusWordAddr)&(GetCharAddr8)&0 xff;ch4=data&0 xff;data=GetCRC16(ch,5);/返回指定數(shù)值指定長度字符串的CRC值ch6=(data8)&0 xff;ch5=data&0 xff;Uart1PutCharNum(ch,7);break;caseUSART1_RTU_04WriteOrder:/04指令寫操作if(USART1_GetDataCpye4=0 x00)&(USART1_GetDataCpye5=0 x01)/只允許寫一個字符data=USART1_GetDataC

14、pye7;WriteMobusWord(USART1_GetMobusAddrCpye,(data8)&0 xff;ch3=data&0 xff;ch4=0 x00;ch5=0 x01;data=GetCRC16(ch,6);/返回指定數(shù)值指定長度字符串的CRC值ch7=(data8)&0 xff;ch6=data&0 xff;Uart1PutCharNum(ch,8);break;default:break;/*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1

15、*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*/TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx/*串口處理函數(shù)*/TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx

16、TxTxTxTxTxTxTxTxTxTxTx/函數(shù)名：USARTl_Configuration輸入:輸出:功能說明：初始化串口硬件設(shè)備，啟用中斷配置步驟：打開GPIO和USART1的時鐘設(shè)置USART1兩個管腳GPIO模式配置USART1數(shù)據(jù)格式、波特率等參數(shù)使能USART1接收中斷功能(5)最后使能USART1功能/TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx/voi

17、dUSART1_Configuration(void)GPIO_InitTypeDefGPIO_InitStructure;USART_InitTypeDefUSART_InitStructure;/RS485控制引腳配置GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8;GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_Init(GPIOA,&GPIO_InitStructure);/*第1步：打開GPIO和USART部件

18、的時鐘*/*第2步：將USARTTx的GPIO配置為推挽復(fù)用模式*/GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_Init(GPIOA,&GPIO_InitStructure);/*第3步：將USARTRx的GPIO配置為浮空輸入模式由于CPU復(fù)位后，GPIO缺省都是浮空輸入模式，因此下面這個步驟不是必須的但是，我還是建議加上便于閱讀，并且防止其它地方修改了這個口線的設(shè)置

19、參數(shù)*/GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;GPIO_Init(GPIOA,&GPIO_InitStructure);/*第4步：配置USART1參數(shù)BaudRate=115200baudWordLength=8BitsOneStopBitNoparityHardwareflowcontroldisabled(RTSandCTSsignals)Receive

20、andtransmitenabled*/USART_InitStructure.USART_BaudRate=2400;USART_InitStructure.USART_WordLength=USART_WordLength_8b;USART_InitStructure.USART_StopBits=USART_StopBits_1;USART_InitStructure.USART_Parity=USART_Parity_No;USART_InitStructure.USART_HardwareFlowControlUSART_HardwareFlowControl_None;USART_

21、InitStructure.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;USART_Init(USART1,&USART_InitStructure);/*若接收數(shù)據(jù)寄存器滿，則產(chǎn)生中斷*/USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);/USART_ITConfig(USART1,USART_IT_TXE,ENABLE);/*第5步：使能USART1，配置完畢*/USART_Cmd(USART1,ENABLE);/*如下語句解決第1個字節(jié)無法正確發(fā)送出去的問題*/USART_ClearFlag(USART1,USART

22、_FLAG_TC);/清標志USARTl_InitData();初始化數(shù)據(jù)/TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx/TOC o 1-5 h z/*/*STM32串口1的RS485讀寫設(shè)置*/*0：讀外部數(shù)據(jù)*/*1：向外發(fā)送數(shù)據(jù)*/u8SetUart1_RS485(u8ch)u32i;if(ch=1)/發(fā)送狀態(tài)GPIO_SetBits(GPIOA,GPIO_Pin_8

23、);for(i=0;iv15000;i+)延時1050nselse/接收狀態(tài)for(i=0;iv15000;i+)延時1050nsGPIO_ResetBits(GPIOA,GPIO_Pin_8);returnGPIO_ReadOutputDataBit(GPIOA,GPIO_Pin_8);/*/*/*/*/TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx/voidUart1_P

24、utChar(u8ch)SetUart1_RS485(1);USART_SendData(USART1,(u8)ch);while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)=RESET);SetUart1_RS485(0);/*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*/TxTxTxTxTxTxTxTxTxTxTxTxTxTxT

25、xTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx/*/*STM32向串口1發(fā)送一串字節(jié)/*/*/*/*/*/u8Uart1PutCharNum(u8ch,u8num)u8i;SetUart1_RS485(1);for(i=0;inum;i+)USART_SendData(USART1,chi);while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)=RESET);SetUart1_RS485(

26、0);returni;/*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*1*/TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTx/*/*STM32在串口1接收1字節(jié)

27、/*說明：串口1接收中斷/*/*/*/*/voidUSART1_IRQHandler(void)u8USART1GetData,i;/*串口接收寄存器滿中斷處/*STM32向串口1發(fā)送1字節(jié)/*if(USART_GetITStatus(USART1,USART_IT_RXNE)!=RESET)/若接收數(shù)據(jù)寄存器滿USART1GetData=USART_ReceiveData(USART1);USARTl_GetDataFlag=USARTl_TIM2_C0UNT;串口接收數(shù)據(jù)繼續(xù)有效標識符/接收數(shù)據(jù)到緩沖區(qū)if(USARTl_GetDataCountUSARTl_GetDataNum)USAR

28、Tl_GetDataUSARTl_GetDataCount+=USARTlGetData;elseUSARTl_GetDataCount=0;USARTl_GetDataUSARTl_GetDataCount+=USARTlGetData;/判斷接收數(shù)據(jù)指令設(shè)備地址if(USARTl_GetDataCount=l)if(USARTl_GetData0!=USARTl_USARTl_Addr)USART1_GetDataCount=0;串口接收數(shù)據(jù)復(fù)位/判斷指令命令類型if(USART1_GetDataCount=2)if(USART1_GetData1=USART1_RTU_04ReadOrd

29、er)/4x讀命令USART1_GetMobusLen=8;串口接收到指令操作數(shù)據(jù)長度USART1_GetMobusOrderCpye=USART1_RTU_04ReadOrder;串口接收到指令操作命令elseif(USART1_GetData1=USART1_RTU_04WriteOrder)/4x寫命令USART1_GetMobusLen=11;串口接收到指令操作數(shù)據(jù)長度USART1_GetMobusOrderCpye=USART1_RTU_04WriteOrder;串口接收到指令操作命令elseUSART1_GetDataCount=0;串口過時接收復(fù)位函數(shù)/接收完一個讀寫指令TxTx

30、TxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxTxif(USART1_GetDataCount=USART1_GetMobusLen)/USART1_GetDataCountCpye=USART1_GetMobusLen;for(i=0;iUSART1_GetDataCountCpye;i+)USART1_GetDataCpyei=USAR

31、T1_GetDatai;USARTl_GetMobusOrderFlag=l;串口接收到指令操作數(shù)據(jù)是否有效標記符/Uartl_PutChar(USARTlGetData);/*文件名稱*功能描述*參數(shù)SysTick時鐘處理串口1數(shù)據(jù)例None*返回None*作者:汪仁海*日期:2013年1月28日*修改人:*日期:*#includemain.hu16SysTick_count;voidSysTick_Configuration(void)/運行狀態(tài)指示燈閃爍引腳定義GPIO_InitTypeDefGPIO_InitStructure;/控制引腳配置GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0;GPIO_