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LGPL-3.0

2022年1月15日14:26:59

https://www.toutiao.com/a7052642755457122848/?tt_from=weixin&utm_campaign=client_share&app=news_article&utm_source=weixin&iid=1698118442418574&utm_medium=toutiao_android&share_token=3beec280-54f0-4acf-a643-f7aa356f6c6f&wxshare_count=1&wid=1642228118965
有感于上面的文章,只开源3个项目。这三个项目都有缺点,需要改正,直接移植都有不同的问题。
谢绝白嫖,拒绝内卷,从我做起。

2018年12月15日15:13:09

版本 V2.0

更新内容: 1. 原先倒序存储的模式,改为正序存储 2. 修改了MODBUS_CONFIG配置文件 3. REQ主机模式可以创建多个从机,读写可以指定存储位置

声明: 这个MODBUS协议是从2018.7.13开始写,到今天7.18总共写了5天。时间比较短,肯定有很多不足之处。希望大家把发现的BUG或者要求都告诉我, 我会进行改进,并将结果通知您。我的联系方式是 QQ: 108287205

文件结构: UHEAD.H - 这个头文件里包含的是u8,u16,u32的数据类型定义,其他的没什么了。 MODBUS - 这里定义了REQ(请求)和RSP(回复)这两种模式所使用的公共的函数。异常代号和功能码都在这里,数据类型都在这里 - 还有一个定时器所使用的函数。这个函数也被REQ,RSP公用 - 注意这里仅需要配置一个地方:MD_BUFNUM 足够大就可以。这是定义存放MODBUS数据的大小,取决于工程的需要 MODBUS_REQ - 请求模式使用(主机) MODBUS_RSP - 回复模式使用(从机) MODBUS_CONFIG - 除了MD_BUFNUM,所有的配置都在这里

数据存放位置: 从机RSP模式 :在MODBUS_CONFIG.C中定义了四个数组,分别是输出线圈,输入线圈,输出寄存器,输入寄存器。 主机REQ模式,读写需要指定数据保存或读取的位置;

移植方法: ① MODBUS.H 中MD_BUFNUM足够大,保证在数据传输时不会溢出。

② MODBUS_CONFIG.H 中配置
	- 包含串口头文件;
	- 分别设置REQ,RSP模式的串口初始化函数;
	- 如果是从机,设置地址,地址范围(1~247);
	- 根据需要使能定义BUFF_OutCoil,BUFF_InCoil,BUFF_HoldREG,BUFF_InREG,指向保存数据的数组,并配置数组的大小
	  
③ MODBUS_CONFIG.C 中配置
	- REQ模式配置串口发送函数: void REQSendMessage(u8* array,u16 num)
	- RSP模式配置串口发送函数: void RSPSendMessage(u8* array,u16 num)

使用方法:

--->首先,定义一个MD_datstr类型的变量。把这个变量想象成一个对象,一个变量就是一个对象。之后的函数调用哪个变量就是对哪个对象处理; 需要一个定时器,并开启定时中断; 需要一个串口,并开启接收中断; 将MODBUS.H中的 MD_Fun_InTime(MD_datstr* pMD_datstr,u32 period)放在定时器中断中,period值是定时器中断的周期时间,单位us

--->从机RSP模式下

使用RSP.H中的函数 MD_RSP_Init(u16 baud,MD_datstr* pMD_Reqstr) 初始化对象,配置波特率;
		将 RSP_Fun_InUart(MD_datstr* pMD_datstr,u8 receiveByte)	放在串口接收中断中;
在主程序中
	不断判断是否接收到数据,然后调用 RSP_CallBack(MD_datstr* pMD_datstr)进行处理,该函数返回异常,可以接收进行处理。

举例:	
	if(MD_str.flag_receiveOK == MD_OK)
	{
		RSP_CallBack(&MD_str);					
	}

--->主机REQ模式下使用 MD_REQ_Init(u16 baud,MD_datstr* pMD_Reqstr)初始化对象,配置波特率 使用req.H中的函数对从机进行询问, 主程序中不断判断是否接收到数据,然后调用REQ_CallBack(MD_datstr* pMD_Reqstr);进行处理。 __weak修饰的函数主要对应的是异常处理,请根据需要改写。默认错误时串口显示

	举例:
		
	if(MD_str.flag_listener)					//发送数据后监听
	{
		if(MD_str.flag_waitRelpy == MD_NO)		//等待超时		
		{
			ErroOutTime(&MD_str);				//超时处理
			MD_str.flag_listener = 0;			//停止监听
		}
		else
		if(MD_str.flag_receiveOK == MD_OK)		//有数据接收到
		{
			REQ_CallBack(&MD_str);							
		}
	}
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简介

自己写的MODBUS主从站协议 , 支持一主多从 ,支持本地即做主机又做从机. 测试环境STM32F1 展开 收起
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