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基于MSP430FE427单片机的RS485源码,485没有使能端,利用串口助手2.1,发一组数据被单片机接受后返回。完全符合645协议,其中数据域接受时减0x33,发送时加0x33。所以收到的数据效验码与发送的会不同。-RS485-based SCM MSP430FE427 source, 485 is not enabled client, using assistant serial 2.1, the one set of data has been accepted to return to single-chip microcomputer. In full compliance with the 645 agreement, which the data field accepted by 0x33, sent plus 0x33. Therefore, the data received and sent well-tested code will be different.
Update : 2024-05-17 Size : 2048 Publisher : 马科

DL : 0
利用MSP430FE427单片机,按照645协议进行485通讯,用串口助手发一组数据被接受后存入FM24C08,然后再读出来发送回来液晶显示数据域。以调试成功。485没所有使能端。-MSP430FE427 Singlechip use, in accordance with the 645 agreement 485 communications, with serial aides issued a set of data has been accepted into FM24C08, and then sent back out to read LCD data field. In order to debug successfully. 485 not all enabled client.
Update : 2024-05-17 Size : 45056 Publisher : 马科

DL : 0
串口通信协议,适合初学者。(232,485 spi)-Serial communication protocol, suitable for beginners. (232,485 spi)
Update : 2024-05-17 Size : 34816 Publisher : 紫木

SCMRS485
DL : 0
程序说明: 此程序用UART1外扩MAX485实现RS-485通信-Procedure Description: This procedure using UART1 extend outside the MAX485 realize RS-485 communication
Update : 2024-05-17 Size : 2048 Publisher : 范跃坤

DL : 0
在windows下的VB开发的485串口测试程序,用来测试串口,发送和接收数据。-In the windows of VB development 485 serial testing procedures used to test serial port, send and receive data.
Update : 2024-05-17 Size : 10240 Publisher : yangbl

SCM232_485
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通过485读取国标电表的有功电量,并通过232 发送出来-Read through the 485 GB of active power meter, and 232 sent out
Update : 2024-05-17 Size : 1024 Publisher : 谢智强

阐述了rs-485总线规范,描述了影响rs-485总线通信速率和通信可靠性的三个因素,同时提出了相应的解决方法并讨论了总线负载能力和传输距离之间的具体关系。-On rs-485 bus specification, describes the impact of rs-485 bus communication speed and communication reliability of the three factors, while the corresponding solutions and discussed the bus load capacity and transmission distance of the specific relationship between the .
Update : 2024-05-17 Size : 96256 Publisher : Jack

RS-485串行总线接口标准以差分平衡方式传输信号,具有很强的抗共模干扰的能力,允许一对双绞线上一个发送器驱动多个负载设备。工业现场控制系统中一般都采用该总线标准进行数据传输,而且一般采用RS-485串行总线接口标准的系统都使用8044芯片作为通信控制器或各分机的CPU。8044芯片内部集成了SDLC,HDLC等通信协议,并且集成了相应的硬件电路,通过硬件电路和标准协议的配合,使系统的通讯准确、可靠、快速。8044在市场上日渐稀少,虽然有8344可替代,但几百元的价位与普通单片机几元至几十元的价位相差甚远,用户在开发一般的单片机应用系统时,都希望能用简单的电路和简单的通信协议完成数据交换。譬如:利用单片机本身所提供的简单串行接口,加上总线驱动器如SN75176等组合成简单的RS-485通讯网络。本文所述的方法已成功地应用于工程项目,一台主机与60台从机通讯,通讯波特率达64KBPS。-err
Update : 2024-05-17 Size : 40960 Publisher : Jack

在工业生产和科学技术研究的各行业中,常常利用PC或工控机对各种数据进行采集。这其中有很多地方需要对各种数据进行采集,如液位、温度、压力、频率等。现在常用的采集方式是通过数据采集板卡,常用的有A/D卡以及422、485等总线板卡。采用板卡不仅安装麻烦、易受机箱内环境的干扰,而且由于受计算机插槽数量和地址、中断资源的限制,不可能挂接很多设备。而通用串行总线(Universal Aerial Bus,简称USB)的出现,很好地解决了以上这些冲突,很容易就能实现低成本、高可靠性、多点的数据采集。-err
Update : 2024-05-17 Size : 39936 Publisher : Jack

485协议程序 也是网上找的 给大家共享 好东西共分享-485 agreement is the online program to everyone looking for good things to share to share
Update : 2024-05-17 Size : 25600 Publisher :

本系统以单片机为核心,通过步进电机实现运动轨迹控制。系统由电机驱动器、黑白线检测、人机交互以及单片机控制器四个部分组成。系统中使用了两个单片机,一片为W78E58B,通过精确算法实现对步进电机的直接控制;另一片为AT89C51,用于语音播放,两单片机之间通过485通信建立联系。此外,看门狗DS1232的应用,提高了单片机控制系统的抗干扰能力。-The system to single-chip microcomputer as the core, through the stepper motor to achieve trajectory control. System consists of motor drives, black and white line detection, human-computer interaction as well as four single-chip controller parts. System using two single-chip, one for W78E58B, through accurate algorithm to realize the direct control of stepper motor another piece for the AT89C51, for voice playback, two single-chip 485 communication between the networking. In addition, the DS1232 watchdog applications, improve the single-chip control system anti-interference ability.
Update : 2024-05-17 Size : 27648 Publisher : 融融

单片机的485和232串口通讯,程序已通过测试可行-SCM 485 and 232 serial communications, the program has been tested to be feasible
Update : 2024-05-17 Size : 2048 Publisher : 融融

DL : 0
这是一个an232和485转换的电路,大家可以看一看-This is a an232 and conversion circuit 485, we can take a look at the
Update : 2024-05-17 Size : 313344 Publisher : 徐俊

这是一个232和485转换的电路,大家可以做为一个参考-This is a 232 and 485 conversion circuit, everyone can be used as a reference
Update : 2024-05-17 Size : 228352 Publisher : 许军

SCMsxba2.5
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智能数字电流表。双CPU工作,2051负责显示,89C52负责采集数据。RS-485总线,自定义通信协议。-Intelligent digital ammeter. Dual-CPU work in 2051 is responsible for display, 89C52 responsible for data collection. RS-485 bus, custom communication protocol.
Update : 2024-05-17 Size : 616448 Publisher :

485光隔离电路图,可隔离5000V高压,波特率最高9600。
Update : 2024-05-17 Size : 97280 Publisher : 咯看

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函数名称: UART_init()串口初始化函数 // 函数功能: 在系统时钟为11.059MHZ时,设定串口波特率为9600bit/s // 串口接收中断允许,发送中断禁止-Function name: UART_init () function to initialize the serial// Function: In the system clock for the time 11.059MHZ, set serial port baud rate for 9600bit/s// serial port receive interrupt permit, send interrupt prohibited
Update : 2024-05-17 Size : 1024 Publisher : 冀军良

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485总线是通过单片机通过串口与上位机通信的总线,可以接受上位机发送的命令和返回操作,本程序为485总线通信的一个实例,希望对大家有所帮助~-485 bus through the single-chip microcomputer with the host computer through the serial communications bus, can accept PC to send commands and to return to operation, the procedures for the 485 Bus communications an example, in the hope that everyone help ~
Update : 2024-05-17 Size : 4096 Publisher :

SCM485mcu
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基于485的51单片机多机通讯程序,其中包括步进电机的控制,液晶屏幕驱动。-51 Based on 485 single-chip multi-machine communication procedures, including the stepper motor control, LCD screen driver.
Update : 2024-05-17 Size : 1710080 Publisher : jerry

SCMrs485
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基于PIC16F873构成485接口的C源码-Based on PIC16F873 constitute 485 of the C source
Update : 2024-05-17 Size : 92160 Publisher : liuzhi
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