python 控制泰克示波器

1         rm = visa.ResourceManager()
2         # res = rm.list_resources()
3         # print(rm)
4         # print(res)
5         self.inst = rm.open_resource(‘USB0::0x0699::0x0528::C019161::INSTR‘)

  1 import matplotlib.pyplot as plt
  2 import visa
  3 import time
  4 
  5 class Tektronix_MSO64:
  6     def __init__(self):
  7         visa_dll = ‘c:/windows/system32/visa32.dll‘
  8         rm = visa.ResourceManager()
  9         # res = rm.list_resources()
 10         # print(rm)
 11         # print(res)
 12         self.inst = rm.open_resource(‘USB0::0x0699::0x0528::C019161::INSTR‘)
 13         ##############################################
 14         self.inst.write("*IDN?")
 15         print(self.inst.read())
 16         self.inst.write(‘CLEAR‘)
 17         self.inst.write(‘ACQuire:MODe?‘)
 18         print(self.inst.read())
 19         self.inst.timeout = 25000
 20         self.inst.write(‘ACQUIRE:STOPAFTER RUNSTOP‘)
 21         self.inst.write(‘ACQuire:STATE RUN‘)
 22 
 23 
 24     def set_HORIZONTAL(self,POSITION,SCALE):#scale us
 25         set_POSITION=‘HORIZONTAL:POSITION %s‘%POSITION
 26         set_SCALE=‘HORIZONTAL:SCALE %se-6‘%SCALE
 27         self.inst.write(set_POSITION)
 28         self.inst.write(set_SCALE)
 29 
 30     def open_ch(self,ch):
 31         op_ch=‘DISplay:GLObal:CH%s:STATE ON‘%ch
 32         self.inst.write(op_ch)
 33 
 34     def close_ch(self,ch):
 35         cl_ch=‘DISplay:GLObal:CH%s:STATE OFF‘%ch
 36         self.inst.write(cl_ch)
 37 
 38     def vertical_ch(self,ch,scale,position):
 39         ver_ch=‘CH%s:BANDWIDTH FULl‘%ch
 40         ver_scale=‘CH%s:SCAle %sE-3‘%(ch,scale)#mv
 41         ver_position=‘CH%s:POSition %s‘%(ch,position)
 42         ver_dc=‘CH%s:COUPLING DC‘%ch
 43         ver_ter=‘CH%s:TERMINATION 10.0E+5‘%ch
 44         self.inst.write(ver_ch)#at its maximum bandwidth
 45         self.inst.write(ver_scale)
 46         self.inst.write(ver_position)
 47         self.inst.write(ver_dc)
 48         self.inst.write(ver_ter)
 49 
 50     def trigger_set(self,ch,level):
 51         trigger_ch=‘TRIGGER:A:EDGE:SOURCE CH%s‘%ch
 52         trigger_level=‘TRIGGER:A:LEVEL:CH4 %s‘%level
 53         self.inst.write(‘TRIGGER:A:EDGE:COUPLING DC‘)
 54         self.inst.write(trigger_ch)
 55         self.inst.write(‘TRIGGER:A:EDGE:SLOPE RISE‘)
 56         self.inst.write(trigger_level)
 57 
 58     def begin_trigger(self):
 59         self.inst.write(‘ACQuire:STOPAfter SEQuence‘)
 60         while 1:
 61             time.sleep(1)
 62             self.inst.write(‘TRIGGER:STATE?‘)
 63             TRIGGER_STATE =self.inst.read()
 64             if TRIGGER_STATE[0] == "S":
 65                 print(‘have triggered‘)
 66                 break
 67 
 68     def data_caul(self,ch,div,position,divH,positionH):
 69         caul_ch=‘DATA:SOURCE CH%s‘%ch
 70         self.inst.write(caul_ch)
 71         self.inst.write(‘DATa:ENCdg ASCIi‘)
 72         self.inst.write(‘WFMOUTPRE:BYT_NR 4‘)
 73         self.inst.write(‘DATA:START 1‘)
 74         self.inst.write(‘DATA:STOP 250e6‘)
 75         self.inst.write(‘WFMOUTPRE?‘)
 76         preamble= self.inst.read()
 77         #########################################################
 78         j=0
 79         point_str=‘ ‘
 80         for i in range(0,len(preamble)):
 81             if preamble[i]==‘,‘:
 82                 j+=1
 83             if j==4:
 84                 point_str=point_str+preamble[i]
 85             elif j==5:
 86                 point_len=len(point_str)
 87                 point_str=point_str[2:(point_len-6)]
 88                 break
 89         point_int=int(point_str)
 90         print(point_int)
 91         ######################################################
 92         data = self.inst.query(‘CURVE?‘)
 93         x = []
 94         dat = [‘ ‘]
 95         dat1 = []
 96         j = 0
 97         for i in range(0, len(data)):
 98             if data[i] == ‘,‘:
 99                 dat1.append(float(dat[j])/32000*div*5-div*position)
100                 x.append((int(j)/point_int*divH*10-divH*10*positionH/100)*0.000001)
101                 j += 1
102                 dat.append(‘ ‘)
103             else:
104                 dat[j] = dat[j] + data[i]
105         # plt.plot(x, dat1, color=‘g‘, linestyle=‘-‘)
106         plt.plot(x, dat1)
107 
108 
109 
110 
111 if __name__ == "__main__":
112     my=Tektronix_MSO64()
113     my.set_HORIZONTAL(10,200)
114     fig = plt.figure()
115     # my.close_ch(1)
116     my.open_ch(4)
117     my.open_ch(3)
118     my.open_ch(2)
119     my.open_ch(1)
120     my.vertical_ch(4,2000,2)
121     my.vertical_ch(3, 2000,2)
122     my.vertical_ch(2, 2000,2)
123     my.vertical_ch(1, 2000,2)
124     my.trigger_set(4,2)
125     my.begin_trigger()
126     my.data_caul(4,2,2,200,10)
127     my.data_caul(3,2,2,200,10)
128     my.data_caul(2,2,2,200,10)
129     my.data_caul(1,2,2,200,10)
130     plt.show()