[经验栈]C#与泰克示波器(Tektronix oscilloscope)MSO64通信操作

1、前言

此次需要用到工具操作示波器动态配置和检验数据，下面为武小栈此次开发的一些总结记录。按理说这里应该用泰克(tektronix)提供的示波器(oscilloscope)驱动和API，但是我没有找到泰克提供的.NET版本的API，我又不是特别熟悉C封装到C#的开发，所以干脆使用了NI-VISA .NET，可能是没有使用到特殊驱动部分，使用并没有出现异常。

2、安装环境

1、NI-VISA

3、C#代码

using System;
using System.Collections.Generic;
using Ivi.Visa;
using NationalInstruments.Visa;

namespace VisaInstruments
{
    public class NiVisaInstrumentsAPIs
    {
        private MessageBasedSession mbSession;
        private IVisaAsyncResult asyncHandle = null;

        public void FindResources(string filter)
        {
            using (var rm = new ResourceManager())
            {
                try
                {
                    IEnumerable resources = rm.Find(filter);
                    foreach (string s in resources)
                    {
                        //可以根据ParseResult查询出硬件类型，如Custom，Gpib，Serial，Usb等
                        //ParseResult parseResult = rm.Parse(s);
                        //HardwareInterfaceType hardwareType = parseResult.InterfaceType;
                    }
                }
                catch (Exception ex)
                {
                   //处理错误
                }
            }
        }


        public bool OpenInstrument(string address)
        {
            try
            {
                using (var rmSession = new ResourceManager())
                {
                    mbSession = (MessageBasedSession)rmSession.Open(address);
                    //mbSession.SynchronizeCallbacks = true;使用异步方法需设SynchronizeCallbacks为true
                    return true;
                }
            }
            catch (Exception exp)
            {
                return false;
            }
        }


        public void Write(string s)
        {
            mbSession.RawIO.Write(ReplaceCommonEscapeSequences(s));
        }
    
        public string Read()
        {
            return InsertCommonEscapeSequences(mbSession.RawIO.ReadString());
        }
    
        public void WriteAsync(string s)
        {
            try
            {
                string textToWrite = ReplaceCommonEscapeSequences(s);
                asyncHandle = mbSession.RawIO.BeginWrite(
                    textToWrite,
                    new VisaAsyncCallback(OnWriteComplete),
                    (object)textToWrite.Length);
            }
            catch (Exception exp)
            {
               
            }
        }
    
        private void OnWriteComplete(IVisaAsyncResult result)
        {
            try
            {
                mbSession.RawIO.EndWrite(result);
                // "Success";
            }
            catch (Exception exp)
            {
                
            }
        }
    
        public void ReadAsync()
        {
            try
            {
                asyncHandle = mbSession.RawIO.BeginRead(
                    1024,
                    new VisaAsyncCallback(OnReadComplete),
                    null);
            }
            catch (Exception exp)
            {
                
            }
        }


        private void OnReadComplete(IVisaAsyncResult result)
        {
            try
            {
                string responseString = mbSession.RawIO.EndReadString(result);
                string info = InsertCommonEscapeSequences(responseString);
            }
            catch (Exception exp)
            {
                
            }
        }
    
        public void AbortRW()
        {
            try
            {
                mbSession.RawIO.AbortAsyncOperation(asyncHandle);
            }
            catch (Exception exp)
            {
               
            }
        }
    
        private string ReplaceCommonEscapeSequences(string s)
        {
            return (s != null) ? s.Replace("\\n", "\n").Replace("\\r", "\r") : s;
        }
    
        private string InsertCommonEscapeSequences(string s)
        {
            return (s != null) ? s.Replace("\n", "\\n").Replace("\r", "\\r") : s;
        }
    
    }

}

4、实体按钮对应指令

重新设置参数  --- *RST

前面板Autoset按钮    ----  AUTOSet EXECute

前面板通道1,2,3,4按钮 --- DISplay:GLObal:CH1:STATE on 

ACQUIRE:STOPAFTER RUNSTOP

前面板Single/Seq按钮 --- ACQUIRE:STOPAFTER SEQuence

前面板放大镜按钮  ---  DISplay:WAVEView1:ZOOM:ZOOM1:STATe ON

前面板Default setup按钮  --- FACtory

需要先执行此条命令解锁命令操作旋钮 HORIZONTAL:DELAY:MODE ON

前面板HORizontal区域position旋钮 -- HORizontal:DELay:TIME 0.3

前面板HORizontal区域scale旋钮 HORIZONTAL:MODE:SCALE 0.5e-3

HORIZONTAL:MODE:SCALE?

前面板vertical区域scale旋钮 CH1:SCAle 100E-2

前面板vertical区域position旋钮  CH2:POSition -2.0

前面板touch off按钮 --- TOUCHSCReen:STATe OFF

前面板trigger区域force按钮 --- TRIGGER FORCE

前面板trigger区域mode按钮 --- TRIGger:A:MODe {AUTO|NORMal}

前面板A,B旋钮  --- TRIGger:{A|B|B:RESET}

5、简单测量参数指令

//设定读取通道和参数

MEASUREMENT:MEAS1:TYPE AMPLITUDE

MEASUREMENT:MEAS1:SOURCE CH1

//读取信息

MEASUREMENT:MEAS1:RESUlts:CURRentacq:MEAN?

//删除测试信息

MEASUREMENT:DELETE "MEAS1"

//截屏

SAVE:IMAGE "C:/Dut12–tests.png"

//可测参数列表

MEASUrement:MEAS:TYPe

{ACCOMMONMODE|ACRMS|AMPlITUDE|AREA|BASE|BITAMPLITUDE|BITHIGH|BITLOW|BURSTWIDTH|COMMONMODE|DATARATE|DCD|DDJ|DDRAOS|DDRAOSPERTCK|DDRAOSPERUI|DDRAUS|DDRAUSPERTCK|DDRAUSPERUI|DDRHOLDDIFF|DDRSETUPDIFF|DDRTCHABS|DDRTCHAVERAGE|DDRTCKAVERAGE|DDRTCLABS|DDRTCLAVERAGE|DDRTERRMN|DDRTERRN|DDRTJITCC|DDRTJITDUTY|DDRTJITPER|DDRTPST|DDRTRPRE|DDRTWPRE|DDRVIXAC|DDRTDQSCK|DELAY|DJ|DJDIRAC|DPMOVERSHOOT|DPMUNDERSHOOT|DPMRIPPLE|DPMTURNOFFTIME|DPMTURNONTIME|EYEHIGH|EYELOW|FALLSLEWRATE|FAHIGH|HEIGHT|HEIGHTBER|HIGHTIME|HOLD|JITTERSUMMARY|J2|J9|LOW|LOWTIME|MAXIMUM|MEAN|MINIMUM|NDUtY|NPERIOD|NPJ|NOVERSHOOT|NWIDTH|PDUTTY|PERIOD|PHASE|PHASENOISE|PJ|PK2Pk|POVERSHOOT|PWIDTH|QFACTOR|RISESLEWRATE|RISETIME|RJ|RJDIRAC|RMS|SRJ|SSCFREQDEV|SSCMODRATE|SETUP|SKEW|TIE|TIMEOUTSIDELEVEL|TJBER|TNTRATIO|TOP|UNITINTERVAL|VDIFFXOVR|WIDTH|WIDTHBER|}

6、简单的GPIO测试用例

//设置垂直刻度为300mv

CH1:SCAle 300E-3 

//位置为-3div

CH1:POSition -3.0 

//耦合为DC

CH1:COUPLING DC 

//设置水平刻度为20ms

HORIZONTAL:MODE:SCALE 20e-3

//打开采集

ACQUIRE:STATE ON

//测量最大电压

MEASUREMENT:MEAS1:TYPE MAXIMUM

MEASUREMENT:MEAS1:SOURCE CH1

//测量最小电压

MEASUREMENT:MEAS2:TYPE MINIMUM

MEASUREMENT:MEAS2:SOURCE CH1

//测量高值

MEASUREMENT:MEAS3:TYPE TOP

MEASUREMENT:MEAS3:SOURCE CH1

//测量低值

MEASUREMENT:MEAS4:TYPE BASE

MEASUREMENT:MEAS4:SOURCE CH1

//停止采集

ACQUIRE:STATE OFF

//设置标签

CH1:LABEL:NAME "GPIO1HIGH"

//截屏

SAVE:IMAGE "G:/GPIO1HIGH.png"

参考资料

4, 5, 6 Series MSO (MSO44, MSO46, MSO54, MSO56, MSO58, MSO58LP, MSO64, LPD64) Programmer Manual

TEKVISA Connectivity Software - V4.2.0