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python串口怎么使用（使用Python3+PyQT5+Pyserial 实现简单的串口工具方法）

更多 时间：2022-03-29 15:55:51 类别：脚本大全 浏览量：342

python串口怎么使用

使用Python3+PyQT5+Pyserial 实现简单的串口工具方法

练手项目，先上图

python串口怎么使用（使用Python3+PyQT5+Pyserial 实现简单的串口工具方法）

先实现一个简单的串口工具，为之后的上位机做准备

代码如下：

github 

pyserial_demo.py

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    		•
  • import sys
  • import serial
  • import serial.tools.list_ports
  • from pyqt5 import qtwidgets
  • from pyqt5.qtwidgets import qmessagebox
  • from pyqt5.qtcore import qtimer
  • from ui_demo_1 import ui_form
  •  
  •  
  • class pyqt5_serial(qtwidgets.qwidget, ui_form):
  •   def __init__(self):
  •     super(pyqt5_serial, self).__init__()
  •     self.setupui(self)
  •     self.init()
  •     self.setwindowtitle("串口小助手")
  •     self.ser = serial.serial()
  •     self.port_check()
  •  
  •     # 接收数据和发送数据数目置零
  •     self.data_num_received = 0
  •     self.lineedit.settext(str(self.data_num_received))
  •     self.data_num_sended = 0
  •     self.lineedit_2.settext(str(self.data_num_sended))
  •  
  •   def init(self):
  •     # 串口检测按钮
  •     self.s1__box_1.clicked.connect(self.port_check)
  •  
  •     # 串口信息显示
  •     self.s1__box_2.currenttextchanged.connect(self.port_imf)
  •  
  •     # 打开串口按钮
  •     self.open_button.clicked.connect(self.port_open)
  •  
  •     # 关闭串口按钮
  •     self.close_button.clicked.connect(self.port_close)
  •  
  •     # 发送数据按钮
  •     self.s3__send_button.clicked.connect(self.data_send)
  •  
  •     # 定时发送数据
  •     self.timer_send = qtimer()
  •     self.timer_send.timeout.connect(self.data_send)
  •     self.timer_send_cb.statechanged.connect(self.data_send_timer)
  •  
  •     # 定时器接收数据
  •     self.timer = qtimer(self)
  •     self.timer.timeout.connect(self.data_receive)
  •  
  •     # 清除发送窗口
  •     self.s3__clear_button.clicked.connect(self.send_data_clear)
  •  
  •     # 清除接收窗口
  •     self.s2__clear_button.clicked.connect(self.receive_data_clear)
  •  
  •   # 串口检测
  •   def port_check(self):
  •     # 检测所有存在的串口，将信息存储在字典中
  •     self.com_dict = {}
  •     port_list = list(serial.tools.list_ports.comports())
  •     self.s1__box_2.clear()
  •     for port in port_list:
  •       self.com_dict["%s" % port[0]] = "%s" % port[1]
  •       self.s1__box_2.additem(port[0])
  •     if len(self.com_dict) == 0:
  •       self.state_label.settext(" 无串口")
  •  
  •   # 串口信息
  •   def port_imf(self):
  •     # 显示选定的串口的详细信息
  •     imf_s = self.s1__box_2.currenttext()
  •     if imf_s != "":
  •       self.state_label.settext(self.com_dict[self.s1__box_2.currenttext()])
  •  
  •   # 打开串口
  •   def port_open(self):
  •     self.ser.port = self.s1__box_2.currenttext()
  •     self.ser.baudrate = int(self.s1__box_3.currenttext())
  •     self.ser.bytesize = int(self.s1__box_4.currenttext())
  •     self.ser.stopbits = int(self.s1__box_6.currenttext())
  •     self.ser.parity = self.s1__box_5.currenttext()
  •  
  •     try:
  •       self.ser.open()
  •     except:
  •       qmessagebox.critical(self, "port error", "此串口不能被打开！")
  •       return none
  •  
  •     # 打开串口接收定时器，周期为2ms
  •     self.timer.start(2)
  •  
  •     if self.ser.isopen():
  •       self.open_button.setenabled(false)
  •       self.close_button.setenabled(true)
  •       self.formgroupbox1.settitle("串口状态（已开启）")
  •  
  •   # 关闭串口
  •   def port_close(self):
  •     self.timer.stop()
  •     self.timer_send.stop()
  •     try:
  •       self.ser.close()
  •     except:
  •       pass
  •     self.open_button.setenabled(true)
  •     self.close_button.setenabled(false)
  •     self.lineedit_3.setenabled(true)
  •     # 接收数据和发送数据数目置零
  •     self.data_num_received = 0
  •     self.lineedit.settext(str(self.data_num_received))
  •     self.data_num_sended = 0
  •     self.lineedit_2.settext(str(self.data_num_sended))
  •     self.formgroupbox1.settitle("串口状态（已关闭）")
  •  
  •   # 发送数据
  •   def data_send(self):
  •     if self.ser.isopen():
  •       input_s = self.s3__send_text.toplaintext()
  •       if input_s != "":
  •         # 非空字符串
  •         if self.hex_send.ischecked():
  •           # hex发送
  •           input_s = input_s.strip()
  •           send_list = []
  •           while input_s != '':
  •             try:
  •               num = int(input_s[0:2], 16)
  •             except valueerror:
  •               qmessagebox.critical(self, 'wrong data', '请输入十六进制数据，以空格分开!')
  •               return none
  •             input_s = input_s[2:].strip()
  •             send_list.append(num)
  •           input_s = bytes(send_list)
  •         else:
  •           # ascii发送
  •           input_s = (input_s + '\r\n').encode('utf-8')
  •  
  •         num = self.ser.write(input_s)
  •         self.data_num_sended += num
  •         self.lineedit_2.settext(str(self.data_num_sended))
  •     else:
  •       pass
  •  
  •   # 接收数据
  •   def data_receive(self):
  •     try:
  •       num = self.ser.inwaiting()
  •     except:
  •       self.port_close()
  •       return none
  •     if num > 0:
  •       data = self.ser.read(num)
  •       num = len(data)
  •       # hex显示
  •       if self.hex_receive.checkstate():
  •         out_s = ''
  •         for i in range(0, len(data)):
  •           out_s = out_s + '{:02x}'.format(data[i]) + ' '
  •         self.s2__receive_text.insertplaintext(out_s)
  •       else:
  •         # 串口接收到的字符串为b'123',要转化成unicode字符串才能输出到窗口中去
  •         self.s2__receive_text.insertplaintext(data.decode('iso-8859-1'))
  •  
  •       # 统计接收字符的数量
  •       self.data_num_received += num
  •       self.lineedit.settext(str(self.data_num_received))
  •  
  •       # 获取到text光标
  •       textcursor = self.s2__receive_text.textcursor()
  •       # 滚动到底部
  •       textcursor.moveposition(textcursor.end)
  •       # 设置光标到text中去
  •       self.s2__receive_text.settextcursor(textcursor)
  •     else:
  •       pass
  •  
  •   # 定时发送数据
  •   def data_send_timer(self):
  •     if self.timer_send_cb.ischecked():
  •       self.timer_send.start(int(self.lineedit_3.text()))
  •       self.lineedit_3.setenabled(false)
  •     else:
  •       self.timer_send.stop()
  •       self.lineedit_3.setenabled(true)
  •  
  •   # 清除显示
  •   def send_data_clear(self):
  •     self.s3__send_text.settext("")
  •  
  •   def receive_data_clear(self):
  •     self.s2__receive_text.settext("")
  •  
  •  
  • if __name__ == '__main__':
  •   app = qtwidgets.qapplication(sys.argv)
  •   myshow = pyqt5_serial()
  •   myshow.show()
  •   sys.exit(app.exec_())
    		•

    ui_demo_1.py

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    		•
  • # -*- coding: utf-8 -*-
  •  
  • # form implementation generated from reading ui file 'demo_1.ui'
  • #
  • # created by: pyqt5 ui code generator 5.6
  • #
  • # warning! all changes made in this file will be lost!
  •  
  • from pyqt5 import qtcore, qtgui, qtwidgets
  •  
  • class ui_form(object):
  •   def setupui(self, form):
  •     form.setobjectname("form")
  •     form.resize(707, 458)
  •     self.formgroupbox = qtwidgets.qgroupbox(form)
  •     self.formgroupbox.setgeometry(qtcore.qrect(20, 20, 167, 301))
  •     self.formgroupbox.setobjectname("formgroupbox")
  •     self.formlayout = qtwidgets.qformlayout(self.formgroupbox)
  •     self.formlayout.setcontentsmargins(10, 10, 10, 10)
  •     self.formlayout.setspacing(10)
  •     self.formlayout.setobjectname("formlayout")
  •     self.s1__lb_1 = qtwidgets.qlabel(self.formgroupbox)
  •     self.s1__lb_1.setobjectname("s1__lb_1")
  •     self.formlayout.setwidget(0, qtwidgets.qformlayout.labelrole, self.s1__lb_1)
  •     self.s1__box_1 = qtwidgets.qpushbutton(self.formgroupbox)
  •     self.s1__box_1.setautorepeatinterval(100)
  •     self.s1__box_1.setdefault(true)
  •     self.s1__box_1.setobjectname("s1__box_1")
  •     self.formlayout.setwidget(0, qtwidgets.qformlayout.fieldrole, self.s1__box_1)
  •     self.s1__lb_2 = qtwidgets.qlabel(self.formgroupbox)
  •     self.s1__lb_2.setobjectname("s1__lb_2")
  •     self.formlayout.setwidget(1, qtwidgets.qformlayout.labelrole, self.s1__lb_2)
  •     self.s1__box_2 = qtwidgets.qcombobox(self.formgroupbox)
  •     self.s1__box_2.setobjectname("s1__box_2")
  •     self.formlayout.setwidget(1, qtwidgets.qformlayout.fieldrole, self.s1__box_2)
  •     self.s1__lb_3 = qtwidgets.qlabel(self.formgroupbox)
  •     self.s1__lb_3.setobjectname("s1__lb_3")
  •     self.formlayout.setwidget(3, qtwidgets.qformlayout.labelrole, self.s1__lb_3)
  •     self.s1__box_3 = qtwidgets.qcombobox(self.formgroupbox)
  •     self.s1__box_3.setobjectname("s1__box_3")
  •     self.s1__box_3.additem("")
  •     self.s1__box_3.additem("")
  •     self.s1__box_3.additem("")
  •     self.s1__box_3.additem("")
  •     self.s1__box_3.additem("")
  •     self.s1__box_3.additem("")
  •     self.s1__box_3.additem("")
  •     self.s1__box_3.additem("")
  •     self.s1__box_3.additem("")
  •     self.s1__box_3.additem("")
  •     self.s1__box_3.additem("")
  •     self.s1__box_3.additem("")
  •     self.formlayout.setwidget(3, qtwidgets.qformlayout.fieldrole, self.s1__box_3)
  •     self.s1__lb_4 = qtwidgets.qlabel(self.formgroupbox)
  •     self.s1__lb_4.setobjectname("s1__lb_4")
  •     self.formlayout.setwidget(4, qtwidgets.qformlayout.labelrole, self.s1__lb_4)
  •     self.s1__box_4 = qtwidgets.qcombobox(self.formgroupbox)
  •     self.s1__box_4.setobjectname("s1__box_4")
  •     self.s1__box_4.additem("")
  •     self.s1__box_4.additem("")
  •     self.s1__box_4.additem("")
  •     self.s1__box_4.additem("")
  •     self.formlayout.setwidget(4, qtwidgets.qformlayout.fieldrole, self.s1__box_4)
  •     self.s1__lb_5 = qtwidgets.qlabel(self.formgroupbox)
  •     self.s1__lb_5.setobjectname("s1__lb_5")
  •     self.formlayout.setwidget(5, qtwidgets.qformlayout.labelrole, self.s1__lb_5)
  •     self.s1__box_5 = qtwidgets.qcombobox(self.formgroupbox)
  •     self.s1__box_5.setobjectname("s1__box_5")
  •     self.s1__box_5.additem("")
  •     self.formlayout.setwidget(5, qtwidgets.qformlayout.fieldrole, self.s1__box_5)
  •     self.open_button = qtwidgets.qpushbutton(self.formgroupbox)
  •     self.open_button.setobjectname("open_button")
  •     self.formlayout.setwidget(7, qtwidgets.qformlayout.spanningrole, self.open_button)
  •     self.close_button = qtwidgets.qpushbutton(self.formgroupbox)
  •     self.close_button.setobjectname("close_button")
  •     self.formlayout.setwidget(8, qtwidgets.qformlayout.spanningrole, self.close_button)
  •     self.s1__lb_6 = qtwidgets.qlabel(self.formgroupbox)
  •     self.s1__lb_6.setobjectname("s1__lb_6")
  •     self.formlayout.setwidget(6, qtwidgets.qformlayout.labelrole, self.s1__lb_6)
  •     self.s1__box_6 = qtwidgets.qcombobox(self.formgroupbox)
  •     self.s1__box_6.setobjectname("s1__box_6")
  •     self.s1__box_6.additem("")
  •     self.formlayout.setwidget(6, qtwidgets.qformlayout.fieldrole, self.s1__box_6)
  •     self.state_label = qtwidgets.qlabel(self.formgroupbox)
  •     self.state_label.settext("")
  •     self.state_label.settextformat(qtcore.qt.autotext)
  •     self.state_label.setscaledcontents(true)
  •     self.state_label.setalignment(qtcore.qt.alignright|qtcore.qt.aligntrailing|qtcore.qt.alignvcenter)
  •     self.state_label.setobjectname("state_label")
  •     self.formlayout.setwidget(2, qtwidgets.qformlayout.spanningrole, self.state_label)
  •     self.verticalgroupbox = qtwidgets.qgroupbox(form)
  •     self.verticalgroupbox.setgeometry(qtcore.qrect(210, 20, 401, 241))
  •     self.verticalgroupbox.setobjectname("verticalgroupbox")
  •     self.verticallayout = qtwidgets.qvboxlayout(self.verticalgroupbox)
  •     self.verticallayout.setcontentsmargins(10, 10, 10, 10)
  •     self.verticallayout.setobjectname("verticallayout")
  •     self.s2__receive_text = qtwidgets.qtextbrowser(self.verticalgroupbox)
  •     self.s2__receive_text.setobjectname("s2__receive_text")
  •     self.verticallayout.addwidget(self.s2__receive_text)
  •     self.verticalgroupbox_2 = qtwidgets.qgroupbox(form)
  •     self.verticalgroupbox_2.setgeometry(qtcore.qrect(210, 280, 401, 101))
  •     self.verticalgroupbox_2.setobjectname("verticalgroupbox_2")
  •     self.verticallayout_2 = qtwidgets.qvboxlayout(self.verticalgroupbox_2)
  •     self.verticallayout_2.setcontentsmargins(10, 10, 10, 10)
  •     self.verticallayout_2.setobjectname("verticallayout_2")
  •     self.s3__send_text = qtwidgets.qtextedit(self.verticalgroupbox_2)
  •     self.s3__send_text.setobjectname("s3__send_text")
  •     self.verticallayout_2.addwidget(self.s3__send_text)
  •     self.s3__send_button = qtwidgets.qpushbutton(form)
  •     self.s3__send_button.setgeometry(qtcore.qrect(620, 310, 61, 31))
  •     self.s3__send_button.setobjectname("s3__send_button")
  •     self.s3__clear_button = qtwidgets.qpushbutton(form)
  •     self.s3__clear_button.setgeometry(qtcore.qrect(620, 350, 61, 31))
  •     self.s3__clear_button.setobjectname("s3__clear_button")
  •     self.formgroupbox1 = qtwidgets.qgroupbox(form)
  •     self.formgroupbox1.setgeometry(qtcore.qrect(20, 340, 171, 101))
  •     self.formgroupbox1.setobjectname("formgroupbox1")
  •     self.formlayout_2 = qtwidgets.qformlayout(self.formgroupbox1)
  •     self.formlayout_2.setcontentsmargins(10, 10, 10, 10)
  •     self.formlayout_2.setspacing(10)
  •     self.formlayout_2.setobjectname("formlayout_2")
  •     self.label = qtwidgets.qlabel(self.formgroupbox1)
  •     self.label.setobjectname("label")
  •     self.formlayout_2.setwidget(0, qtwidgets.qformlayout.labelrole, self.label)
  •     self.label_2 = qtwidgets.qlabel(self.formgroupbox1)
  •     self.label_2.setobjectname("label_2")
  •     self.formlayout_2.setwidget(1, qtwidgets.qformlayout.labelrole, self.label_2)
  •     self.lineedit = qtwidgets.qlineedit(self.formgroupbox1)
  •     self.lineedit.setobjectname("lineedit")
  •     self.formlayout_2.setwidget(0, qtwidgets.qformlayout.fieldrole, self.lineedit)
  •     self.lineedit_2 = qtwidgets.qlineedit(self.formgroupbox1)
  •     self.lineedit_2.setobjectname("lineedit_2")
  •     self.formlayout_2.setwidget(1, qtwidgets.qformlayout.fieldrole, self.lineedit_2)
  •     self.hex_send = qtwidgets.qcheckbox(form)
  •     self.hex_send.setgeometry(qtcore.qrect(620, 280, 71, 16))
  •     self.hex_send.setobjectname("hex_send")
  •     self.hex_receive = qtwidgets.qcheckbox(form)
  •     self.hex_receive.setgeometry(qtcore.qrect(620, 40, 71, 16))
  •     self.hex_receive.setobjectname("hex_receive")
  •     self.s2__clear_button = qtwidgets.qpushbutton(form)
  •     self.s2__clear_button.setgeometry(qtcore.qrect(620, 80, 61, 31))
  •     self.s2__clear_button.setobjectname("s2__clear_button")
  •     self.timer_send_cb = qtwidgets.qcheckbox(form)
  •     self.timer_send_cb.setgeometry(qtcore.qrect(260, 390, 71, 16))
  •     self.timer_send_cb.setobjectname("timer_send_cb")
  •     self.lineedit_3 = qtwidgets.qlineedit(form)
  •     self.lineedit_3.setgeometry(qtcore.qrect(350, 390, 61, 20))
  •     self.lineedit_3.setalignment(qtcore.qt.alignright|qtcore.qt.aligntrailing|qtcore.qt.alignvcenter)
  •     self.lineedit_3.setobjectname("lineedit_3")
  •     self.dw = qtwidgets.qlabel(form)
  •     self.dw.setgeometry(qtcore.qrect(420, 390, 54, 20))
  •     self.dw.setobjectname("dw")
  •     self.verticalgroupbox.raise_()
  •     self.verticalgroupbox_2.raise_()
  •     self.formgroupbox.raise_()
  •     self.s3__send_button.raise_()
  •     self.s3__clear_button.raise_()
  •     self.formgroupbox.raise_()
  •     self.hex_send.raise_()
  •     self.hex_receive.raise_()
  •     self.s2__clear_button.raise_()
  •     self.timer_send_cb.raise_()
  •     self.lineedit_3.raise_()
  •     self.dw.raise_()
  •  
  •     self.retranslateui(form)
  •     qtcore.qmetaobject.connectslotsbyname(form)
  •  
  •   def retranslateui(self, form):
  •     _translate = qtcore.qcoreapplication.translate
  •     form.setwindowtitle(_translate("form", "form"))
  •     self.formgroupbox.settitle(_translate("form", "串口设置"))
  •     self.s1__lb_1.settext(_translate("form", "串口检测："))
  •     self.s1__box_1.settext(_translate("form", "检测串口"))
  •     self.s1__lb_2.settext(_translate("form", "串口选择："))
  •     self.s1__lb_3.settext(_translate("form", "波特率："))
  •     self.s1__box_3.setitemtext(0, _translate("form", "115200"))
  •     self.s1__box_3.setitemtext(1, _translate("form", "2400"))
  •     self.s1__box_3.setitemtext(2, _translate("form", "4800"))
  •     self.s1__box_3.setitemtext(3, _translate("form", "9600"))
  •     self.s1__box_3.setitemtext(4, _translate("form", "14400"))
  •     self.s1__box_3.setitemtext(5, _translate("form", "19200"))
  •     self.s1__box_3.setitemtext(6, _translate("form", "38400"))
  •     self.s1__box_3.setitemtext(7, _translate("form", "57600"))
  •     self.s1__box_3.setitemtext(8, _translate("form", "76800"))
  •     self.s1__box_3.setitemtext(9, _translate("form", "12800"))
  •     self.s1__box_3.setitemtext(10, _translate("form", "230400"))
  •     self.s1__box_3.setitemtext(11, _translate("form", "460800"))
  •     self.s1__lb_4.settext(_translate("form", "数据位："))
  •     self.s1__box_4.setitemtext(0, _translate("form", "8"))
  •     self.s1__box_4.setitemtext(1, _translate("form", "7"))
  •     self.s1__box_4.setitemtext(2, _translate("form", "6"))
  •     self.s1__box_4.setitemtext(3, _translate("form", "5"))
  •     self.s1__lb_5.settext(_translate("form", "校验位："))
  •     self.s1__box_5.setitemtext(0, _translate("form", "n"))
  •     self.open_button.settext(_translate("form", "打开串口"))
  •     self.close_button.settext(_translate("form", "关闭串口"))
  •     self.s1__lb_6.settext(_translate("form", "停止位："))
  •     self.s1__box_6.setitemtext(0, _translate("form", "1"))
  •     self.verticalgroupbox.settitle(_translate("form", "接受区"))
  •     self.verticalgroupbox_2.settitle(_translate("form", "发送区"))
  •     self.s3__send_text.sethtml(_translate("form", "<!doctype html public \"-//w3c//dtd html 4.0//en\" \"http://www.w3.org/tr/rec-html40/strict.dtd\">\n"
  • "<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
  • "p, li { white-space: pre-wrap; }\n"
  • "</style></head><body style=\" font-family:\'simsun\'; font-size:9pt; font-weight:400; font-style:normal;\">\n"
  • "<p style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\">123456</p></body></html>"))
  •     self.s3__send_button.settext(_translate("form", "发送"))
  •     self.s3__clear_button.settext(_translate("form", "清除"))
  •     self.formgroupbox1.settitle(_translate("form", "串口状态"))
  •     self.label.settext(_translate("form", "已接收："))
  •     self.label_2.settext(_translate("form", "已发送："))
  •     self.hex_send.settext(_translate("form", "hex发送"))
  •     self.hex_receive.settext(_translate("form", "hex接收"))
  •     self.s2__clear_button.settext(_translate("form", "清除"))
  •     self.timer_send_cb.settext(_translate("form", "定时发送"))
  •     self.lineedit_3.settext(_translate("form", "1000"))
  •     self.dw.settext(_translate("form", "ms/次"))
    		•

    以上这篇使用python3+pyqt5+pyserial 实现简单的串口工具方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持开心学习网。

    原文链接：https://blog.csdn.net/windowsyun/article/details/80001488

    标签：串口 Python3 pyqt5 pySerial
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