pySerial -- Python的串口通讯模块

介绍

pySerial封装了串口通讯模块，支持Linux、Windows、BSD(可能支持所有支持POSIX的操作系统)，支持Jython(Java)和IconPython(.NET and Mono).首页 http://pyserial.sf.net/

特性

• 所有平台使用同样的类接口
• 端口号默认从0开始，程序中不需要知道端口名称
• 像文件读写一样的API，read、write（readline等也受支持）
• 所有程序全由Python完成，除了标准库外不依赖其他包，除了pywin32(windows)、JavaComm(Jython). POSIX(Linux, BSD) 只依赖Python标准库。

依赖环境

• Python2.2或更新版本
• windows 上的 pywin32扩展
• Java/Jython上的 "Java Communications" (JavaComm)或者兼容包

安装

pip/easy_installpip install pyserial easy_install pyserial windows下载地址 ： http://sourceforge.net/project/showfiles.php?group_id=46487

快速上手

Open port 0 at "9600,8,N,1", no timeout>>> import serial >>> ser = serial.Serial(0) # open first serial port >>> print ser.portstr # check which port was really used >>> ser.write("hello") # write a string >>> ser.close() # close port Open named port at "19200,8,N,1", 1s timeout>>> ser = serial.Serial('/dev/ttyS1', 19200, timeout=1) >>> x = ser.read() # read one byte >>> s = ser.read(10) # read up to ten bytes (timeout) >>> line = ser.readline() # read a '/n' terminated line >>> ser.close() Open second port at "38400,8,E,1", non blocking HW handshaking>>> ser = serial.Serial(1, 38400, timeout=0, ... parity=serial.PARITY_EVEN, rtscts=1) >>> s = ser.read(100) # read up to one hundred bytes ... # or as much is in the buffer Get a Serial instance and configure/open it later>>> ser = serial.Serial() >>> ser.baudrate = 19200 >>> ser.port = 0 >>> ser Serial0xa81c10, open=False>(port='COM1', baudrate=19200, bytesize=8, parity='N', stopbits=1, timeout=None, xonxoff=0, rtscts=0) >>> ser.open() >>> ser.isOpen() True >>> ser.close() >>> ser.isOpen() False 如果给定端口，端口将在创建对象之后立即打开，如果没有给定端口，可选timeout参数timeout=None # wait forever timeout=0 # non-blocking mode (return immediately on read) timeout=x # set timeout to x seconds (float allowed)

Serial实例的可用方法

open() # 打开端口 close() # 立即关闭端口 setBaudrate(baudrate) # change baud rate on an open port inWaiting() # return the number of chars in the receive buffer read(size=1) # read "size" characters write(s) # 把字符串s写到该端口 flushInput() # 清除输入缓存区，放弃所有内容 flushOutput() # 清除输出缓冲区，放弃输出 sendBreak() # 发送中断条件 setRTS(level=1) # set RTS line to specified logic level setDTR(level=1) # set DTR line to specified logic level getCTS() # return the state of the CTS line getDSR() # return the state of the DSR line getRI() # return the state of the RI line getCD() # return the state of the CD line

Serial实例的属性

只读portstr # 设备名称 BAUDRATES # list of valid baudrates BYTESIZES # list of valid byte sizes PARITIES # list of valid parities STOPBITS # list of valid stop bit widths 下面属性值被更改后端口会重新配置，即使端口已经打开port # port name/number as set by the user baudrate # current baud rate setting bytesize # byte size in bits parity # parity setting stopbits # stop bit with (1,2) timeout # timeout setting xonxoff # if Xon/Xoff flow control is enabled rtscts # if hardware flow control is enabled

异常

serial.SerialException

常量

parity:serial.PARITY_NONE serial.PARITY_EVEN serial.PARITY_ODD stopbitsserial.STOPBITS_ONE al.STOPBITS_TWO bytesize:serial.FIVEBITS serial.SIXBITS serial.SEVENBITS serial.EIGHTBITS 翻译(有删减)仅供参考原文地址：http://blog.csdn.net/dainiao01/article/details/5885122 官方文档：http://pyserial.sf.net/