VC_GPIB_Demo

#include "stdafx.h"
#include "C:\Program Files\IVI Foundation\VISA\WinNT\agvisa\include\visa.h"
#pragma comment(lib,"C:\\Program Files\\IVI Foundation\\VISA\\WinNT\\agvisa\\lib\\msc\\agvisa32.lib")
#include <stdio.h>
void main () {
ViSession defaultRM, vi;
char buf [256] = {0};
/* Open session to GPIB device at address 22 */
viOpenDefaultRM (&defaultRM);
viOpen (defaultRM, "GPIB0::22::INSTR", VI_NULL,VI_NULL, &vi);
/* Initialize device(Reset) */
viPrintf (vi, "*RST\n");
/* Send an *IDN? string to the device */
viPrintf (vi, "*IDN?\n");
/* Read results */
viScanf (vi, "%t", &buf);
//viQueryf(vi, "*IDN?\n","%t",%buf);//上两条语句可用此条代替
/* Print results */
printf ("Instrument identification string: %s\n", buf);
//信号源---特定的信号源可能命令不一样，需要参考编程文档
int freq=999;
viPrintf(vi, "FREQ %dMHz\n",freq);
viPrintf(vi, "POW  0dBm\n");
viPrintf(vi, "OUTP ON\n"); //RF ON
viPrintf(vi, "MOD ON\n");  //调制开
//频谱仪
viPrintf(vi, "SYST:DISP:UPDate ON\n");//屏幕显示，不显示速度较快
viPrintf(vi, "FREQ:CENT 999MHz\n");
viPrintf(vi, "FREQ:SPAN 10MHz\n");
viPrintf(vi, "CALC:MARK:AOFF\n");
viPrintf(vi, "SWE:TIME 2s\n");//扫描时间
viPrintf(vi, "SYST:PSAVE ON\n");//省电模式
viPrintf(vi, "DISP:TRAC:Y:RLEV 10dBm\n");
viPrintf(vi, "DISP:WIND:TRAC:Y:RLEV:OFFS 10dB\n");
viPrintf(vi, "CALC:MARK:X 999MHz\n");//MARK ON
viPrintf(vi, "BAND:RES 100kHz\n");//RBW
viPrintf(vi, "BAND:VID 300kHz\n");//VBW  
//自动校准需要单次扫描，连续扫描不准确   
viPrintf(vi, "INIT:CONT OFF\n");
//WAI用于同步，还有OPC等也可用于同步,仅用于overlapping command，sequential command
//无用，不过用
viPrintf(vi, "INIT:IMM;*WAI\n");
viPrintf(vi, "CALC:MARK:MAX\n");
//读取mark的值
viQueryf(vi, "CALC:MARK:Y?\n","%t",buf);  
printf("The mark value is:%s.\n",buf);
//功率计
viPrintf(vi, "SENS:CORR:OFFS 31\n");//外部补偿电平 db!!!!ok
viPrintf(vi, "DISP:TRAC:VCENT 55dBm\n");//参考电平 
viPrintf(vi, "TRIG:LEV 40dBm\n");//触发电平 dBm
viPrintf(vi, "TRIG:DEL 0\n");//触发事件位置us   ns/div us/div ms/div
viPrintf(vi, "DISP:PULS:TIMEBASE 10us\n");//时间单位 (moren s) 100us
viPrintf(vi, "DISP:TRAC:VSCALe 5dB\n");//db/格  db dBm,dBV,dBmV,dbuV dBuV
//网分仪
viPrintf(vi, "SYST:DISP:UPDate ON\n");
viPrintf(vi, "SWE:COUnt 12\n");
viPrintf(vi, "CALC:PAR:SEL 'CH1_S11_1'\n");
viPrintf(vi, "CALC:PAR:DEF 'My_S11',s11\n");
//////
viPrintf(vi, "CALCulate1:PARameter:SELect 'Ch1Trc2' 'S21'\n");
viPrintf(vi, "SYST:DISP:UPDate ON\n");
viPrintf(vi, "CALC:FORM PHAS\n");
viPrintf(vi, "FORMat ASCII\n");
viQueryf(vi, "INITiate1:CONTinuous OFF;*OPC?\n","%s", buf);
viPrintf(vi, "SENS1:FREQ:STAR 1000MHz\n");
viPrintf(vi, "SENS1:FREQ:STOP 1125MHz\n");
viPrintf(vi, "SENS1:SWE:POIN 126\n");
viPrintf(vi, "OUTP1  OFF\n");
viPrintf(vi, "SOUR:POW -7\n");
viPrintf(vi, "CALC1:MARK1 ON\n");
//////////////////////////////////////////////////////
/* Close session */
viClose(vi);
viClose(defaultRM);
while(1);//pause for see the result.
}

/*

一段VC写的VISA GPIB控制代码。
注意事项：
1.必须先安装Agilent IO Library驱动，本人添加的是默认位置的库；
装了驱动后有很多很好的文档C:\Program Files\Agilent\IO Libraries Suite\Manuals\visa.pdf
2.安捷伦提供SICL 和 VISA两种库，不推荐用SICL,因为VISA更通用，
  NI也用VISA，函数名一致，都是viOpenDefaultRM，viOpen，viPrintf，viQueryf，viClose。
3.GPIB是用来控制电子仪器的，主要用在自动化控制，测试上。标准是SCPI，可以google下。
4.其实不难，但要多实践，只是调用API(头文件visa.h,库agvisa32.lib)，API常用的就是几个，
viOpenDefaultRM，viOpen，viPrintf，viQueryf，viClose...
还有viSetAttribute,viScanf等；
viSetAttribute(vi,VI_ATTR_TMO_VALUE,20000);//超时时间20s 
其他的主要是SCPI命令，大多是标准化的，查查编程文档即可。
5.较新的技术是： LXI(LAN Extention Interface),网口控制，
因为一个方面是GPIB接口较贵(3k-5k)，设备也只能接十几个(通常足够了);
6.扫描时需要单次同步，这样才准确；
7，应该多在Agilent和NI官网看看。
8.好书：《NI-VISAProgrammersMan》，《Agilent VISA User's Guide》
9.自动搜索仪器，根据*IDN知道什么仪器
ViChar buffer[255];
ViRsrc mathes=buffer;
ViUInt32 nmatched;
ViFindList list;

viFindRsrc(defaultRM,"GPIB?*INSTR",&list,&nmatched,
 matched);
viFindNext(list,matches);
viFindNext(list,matches);
...
viClose(list);
10. 测量多个数据可能用到strtok函数,或直接保存到一个数组里；

11.至于GPIB规范，总线电缆 包括16根信号线和9根地线。16根信号线中，8根为数据线，5根

为接口管理线，3根为握手线。IFC，ATN，了解即可。
12.FORMAT ASCii | In
自动校准用，写多了也没什么意思了。
//*/
信号源
//信号源设置较少，主要设置频率和功率。
viPrintf(vi_sig, "FREQ 999MHz\n");
viPrintf(vi_sig, "POW  0dBm\n");
viPrintf(vi_sig, "OUTP ON\n"); //射频开
viPrintf(vi_sig, "MOD  ON\n"); //调制开
其他滤波器什么的，很少用。
最新的仪器有有个很强大的功能，按下某个键即可显示其相应的SCPI命令，
于此我们不用查编程文档了，真是爽歪歪。
viPrintf(vi_sig,"DM:IQ:STATE ON\n");
//viPrintf(vi_4438c, "OUTP:MOD:STAT OFF\n");//
//viPrintf(vi_4438c,"DM:STATE ON\n");

//频谱仪

viPrintf(vi_spec, "SYST:DISP:UPDate ON\n");
viPrintf(vi_spec, "FREQ:CENT %dMHz\n",m_cent_freq);
viPrintf(vi_spec, "FREQ:SPAN %dMHz\n",m_span);
viPrintf(vi_spec, "DISP:WIND:TRAC:Y:RLEV %ddBm\n",m_rlevel);
viPrintf(vi_spec, "BAND:VID %dkHz\n",m_rbw);
viPrintf(vi_spec, "BAND:RES %dkHz\n",m_vbw);
viPrintf(vi_spec, "CALC:MARK:AOFF\n");
//////////////////////////////////////
char buf[255];
viPrintf(vi_spec,"INIT:CONT OFF\n");
viPrintf(vi_spec,"INIT:IMM;*WAI\n");
viPrintf(vi_spec,"CALC:MARK:MAX\n");
viPrintf(vi_spec,"*WAI\n");
viQueryf(vi_spec,"CALC:MARK:Y?\n","%t",buf);
viPrintf(vi_spec,"*WAI\n");
viPrintf(vi_spec,"INIT:CONT ON\n");
viPrintf(vi_spec, "SWE:TIME 2s\n");

//功率计
/*
viPrintf(vi_boonton,"SENS:CORR:OFFS 31dBm\n");//外部补偿电平
viPrintf(vi_boonton,"DISP:TRAC:VCENT 55dBm\n");//参考电平
viPrintf(vi_boonton,"TRIG:LEV 40dBm\n");//触发电平
viPrintf(vi_boonton,"DISP:PULS:TIMEBASE 10us\n");//时间单位
viPrintf(vi_boonton,"DISP:TRAC:VSCALe 5dB\n");//db/格
viPrintf(vi_boonton,"*CLS\n");
viPrintf(vi_boonton,"CALC:MODE PULSE\n");
viPrintf(vi_boonton,"DISP:PARA:MODE MEAS\n");
viPrintf(vi_boonton,"SENS:CORR:OFFS 0\n");//0dB//外部补偿电平
viPrintf(vi_boonton,"TRIG:LEV 0\n");//触发电平0
viPrintf(vi_boonton,"DISP:TRAC:VCENT 0\n");//参考电平
viPrintf(vi_boonton,"DISP:TRAC:VSCALe 5\n");//db/格 10
viPrintf(vi_boonton,"TRIG:DEL 0\n");//触发事件位置s 0 
viPrintf(vi_boonton,"DISP:PULS:TIMEBASE 5us\n");//pow
viPrintf(vi_boonton,"DISP:PULS:TIMEBASE 5us\n");
viPrintf(vi_boonton,"*WAI\n");
//viQueryf(vi_boonton,"FETCH:INTER:MAX ?\n","%t",buf);
viQueryf(vi_boonton,"FETCH:ARRAY:AMEA:POW  ?\n","%t",buf);

viPrintf(vi_boonton,"TRIG:SLOP POS\n");
viPrintf(vi_boonton,"DISP:PULS:TIMEBASE 100ns\n");
viPrintf(vi_boonton,"*WAI\n");
viQueryf(vi_boonton,"FETCH:ARRAY:AMEA:TIM ?\n","%t",buf_time);
viQueryf(vi_boonton,"FETCH:INTER:MAX ?\n","%t",buf_p);//0410
viQueryf(vi_boonton,"FETCH:ARRAY:AMEA:POW  ?\n","%t",buf_p);
viPrintf(vi_boonton,"*WAI\n");
str_time=buf_time;count=0;

/////////////////////////测试下降沿
viPrintf(vi_boonton,"TRIG:SLOP NEG\n");
viPrintf(vi_boonton,"*WAI\n");
viQueryf(vi_boonton,"FETCH:ARRAY:AMEA:TIM ?\n","%t",buf_time);
viQueryf(vi_boonton,"FETCH:ARRAY:AMEA:POW  ?\n","%t",buf_p2);
//viQueryf(vi_boonton,"FETCH:INTER:MAX ?\n","%t",buf_p2);//均值
viPrintf(vi_boonton,"*WAI\n");
//
viQueryf(vi,"FETCH:INTER:AVER?\n","%t",buf);READ:INTER:AVER
viQueryf(vi,"FETCH:INTER:MAX?\n","%t",buf); READ:INTER:MAX

//////////////////////////////////////////////////////
viPrintf(vi_zvb, "SYST:DISP:UPDate ON\n");
viPrintf(vi_zvb, "SWE:COUnt %d\n",m_point);
viPrintf(vi_zvb, "CALC:PAR:SEL 'CH1_S11_1'\n");
viPrintf(vi_zvb, "CALC:PAR:DEF 'My_S11',s11\n");
//////
viPrintf(vi_zvb, "CALCulate1:PARameter:SELect 'Ch1Trc2' 'S21'\n");
viPrintf(vi_zvb, "SYST:DISP:UPDate ON\n");
viPrintf(vi_zvb, "CALC:FORM PHAS\n");
viPrintf(vi_zvb, "FORMat ASCII\n");
viQueryf(vi_zvb, "INITiate1:CONTinuous OFF;*OPC?\n","%s", ValueStr);
viPrintf(vi_zvb, "SENS1:FREQ:STAR 1000MHz\n");
viPrintf(vi_zvb, "SENS1:FREQ:STOP 1125MHz\n");
viPrintf(vi_zvb, "SENS1:SWE:POIN 126\n");
viPrintf(vi_zvb, "OUTP1  OFF\n");
viPrintf(vi_zvb, "SOUR:POW -7\n");

viPrintf(vi_zvb,"CALC1:MARK1 ON\n");