前回に引き続き、OWON の USBオシロスコープ VDS3104(LAN無しモデル) をpythonで制御してみます。
環境
OS : Windows 10
対象機器 : VDS3104
アプリ : OWON VDS 2.0.19.4
言語 : python 3.7
SCPIコマンド
OWONのexampleに 'VDS Series SCPI Protocol V1.6.pdf'が同梱されています。これに記載されている各SCPIコマンドの動作を確認してみました。
当初、少し古いバージョンのアプリ(OWON VDS 2.0.17)を使っていたところ、いくつかのコマンドがレスポンス b'CAN NOT ANALYSE THE ORDER' を返して動かないということが分かりました。
そこで、最新版のアプリ(OWON VDS 2.0.19.4)とUSBドライバーをにしたところ正しく動作するようになりました。
vds02.py
from socket import AF_INET, socket, SOCK_STREAM, setdefaulttimeout
from time import sleep
class LanSource:
def __init__(self, address):
#param address: (ip, port) -> (str, int)
super(LanSource, self).__init__()
setdefaulttimeout(5)
client = socket(AF_INET, SOCK_STREAM)
client.connect(address)
client.settimeout(5)
self.address = address
self.client = client
def close(self):
self.client.close()
def PlayCmds(ls, cmdlist):
for cmd, slp, dst in cmdlist:
print(cmd)
ls.client.send(cmd)
sleep(slp)
dat = b''
while True:
rsv = ls.client.recv(2048)
dat += rsv
if len(rsv) < 2048: break
if dst:
with open(dst,"wb") as f:
f.write(dat)
else:
print(dat)
Commands_Init = [
[b'*ADC? CH1', 1, 'adc_ch1.bin']
,[b'*AUToset', 10, '']
,[b'*LDM? C:\\tmp\\DAT', 5, '']
,[b'*RDM?', 5, 'RDMDAT.bin']
,[b'*RUNStop', 1, '']
,[b'*RUNStop', 1, '']
,[b'*IDN?', 0, '']
,[b'*RST', 1, '']
,[b':MEASure:SOURce CH1', 0, '']
,[b':MEASure:ADD PERiod', 0, '']
,[b':MEASure:DELete MAX', 0, '']
,[b':MEASure:PERiod?', 0, '']
,[b':MEASure:FREQuency?', 0, '']
,[b':MEASure:AVERage?', 0, '']
,[b':MEASure:MAX?', 0, '']
,[b':MEASure:MIN?', 0, '']
,[b':MEASure:VTOP?', 0, '']
,[b':MEASure:VBASe?', 0, '']
,[b':MEASure:VAMP?', 0, '']
,[b':MEASure:PKPK?', 0, '']
,[b':MEASure:CYCRms?', 0, '']
,[b':MEASure:RTIMe?', 0, '']
,[b':MEASure:FTIMe?', 0, '']
,[b':MEASure:PDUTy?', 0, '']
,[b':MEASure:NDUTy?', 0, '']
,[b':MEASure:PWIDth??', 0, '']
,[b':MEASure:NWIDth??', 0, '']
,[b':MEASure:OVERshoot?', 0, '']
,[b':MEASure:PREShoot?', 0, '']
,[b':MEASure:RDELay?', 0, '']
,[b':MEASure:FDELay?', 0, '']
,[b':ACQuire:TYPE AVERage', 0, '']
,[b':ACQuire:AVERage 64', 0, '']
,[b':ACQuire:MDEPth 10K', 0, '']
,[b':TIMebase:SCALe 200us', 0, '']
,[b':TIMebase:HOFFset 50', 0, '']
,[b':FFT:DISPlay ON', 0, '']
,[b':FFT: FREQbase 10MHz', 0, '']
,[b':FFT:FORMat VRMS 0.5', 0, '']
,[b':FFT:FORMat DB 2DB', 0, '']
,[b':FFT:WINDow RECTangle', 0, '']
,[b':FFT:ZONE X5', 0, '']
,[b':CHANnel1:DISPlay ON', 0, '']
,[b':CHANnel1:COUPling DC', 0, '']
,[b':CHANnel1:PROBe X10', 0, '']
,[b':CHANnel1:SCALe 0.5', 0, '']
,[b':CHANnel1:OFFSet 25', 0, '']
,[b':CHANnel1: HARDfreq?', 0, '']
,[b':CHANnel1: INVerse ON', 0, '']
,[b':CHANnel1:CURRent ON', 0, '']
,[b':TRIGger:TYPE SINGle', 0, '']
,[b':TRIGger:MODE NORMal', 0, '']
,[b':TRIGger:SINGle VIDeo', 0, '']
,[b':TRIGger:ALT VIDeo', 0, '']
,[b':TRIGger:SINGle:EDGE:SOURce CH2', 0, '']
,[b':TRIGger:SINGle:EDGE:SLOPe FALL', 0, '']
,[b':TRIGger:SINGle:EDGE:LEVel 25', 0, '']
,[b':TRIGger:SINGle:VIDeo:SOURce CH2', 0, '']
,[b':TRIGger:SINGle:VIDeo:MODU NTSC', 0, '']
,[b':TRIGger:SINGle:VIDeo:SYNC ODD', 0, '']
,[b':TRIGger:SINGle:VIDeo:LNUM 100', 0, '']
,[b':TRIGger:ALT:EDGE:SOURce CH2', 0, '']
,[b':TRIGger:ALT:EDGE:SLOPe FALL', 0, '']
,[b':TRIGger:ALT:EDGE:LEVel 50', 0, '']
,[b':TRIGger:ALT:VIDeo:SOURce CH2', 0, '']
,[b':TRIGger:ALT:VIDeo:MODU NTSC', 0, '']
,[b':TRIGger:ALT:VIDeo:SYNC ODD', 0, '']
,[b':TRIGger:ALT:VIDeo:LNUM100', 0, '']
,[b':SAVE:CSV C:\\TMP\\test.csv', 2, '']
,[b':SAVE:IMAGe C:\\TMP\\test.png', 2, '']
,[b':SAVE:IMAGe:INVert ON', 0, '']
,[b':CURSor:HORizontal:DISPlay ON', 0, '']
,[b':CURSor:HORizontal:BAR1 500', 0, '']
,[b':CURSor:VERTical:DISPlay ON', 0, '']
,[b':CURSor:HORizontal:BAR1 250', 0, '']
,[b':CURSor:SOURce CH1', 0, '']
,[b':CURSor:X1?', 0, '']
,[b':CURSor:XDELta?', 0, '']
,[b':CURSor:IXDELta?', 0, '']
,[b':CURSor:Y1?', 0, '']
,[b':CURSor:YDELta?', 0, '']
]
if __name__ == '__main__':
ls = LanSource(('localhost', 5188))
PlayCmds(ls, Commands_Init)
ls.close()
コマンド-レスポンス確認結果
'*ADC?'コマンドのレスポンスの先頭4バイトはビッグエンディアンでデータサイズを示しているようで、レコード長が1kの時は0x000003E8(1000)、それ以外の時は0x00000F9C(3996)となります。それに続くデータは符号付8ビットデータ(波形の縦軸の中央が0)と思われます。
| コマンド | レスポンス例 |
|---|---|
| b'*ADC? CH1' | (データサイズ) + (データ) |
| b'*AUToset' | b'SUCCESS\n\r' |
| b'*LDM? C:\\tmp\\DAT' | b'GETTING DEEPMEMORY DATA , PLEASE WAIT...\r\nTRANSMITSSION DONE SAVED @ C:\\TMP\\DAT\\2021_0828_18.39.39.bin\r\n' |
| b'*RDM?' | b'GETTING DEEPMEMORY DATA , PLEASE WAIT...\r\n' + (データ) + b'TRANSMITSSION DONE\r\n' |
| b'*RUNStop' | b'SET RUN\n\r' |
| b'*RUNStop' | b'SET STOP\n\r' |
| b'*IDN?' | b'OWON,VDS3104,VDS31041506121,V4.0\n\r' |
| b'*RST' | b'SUCCESS\n\r' |
| b':MEASure:SOURce CH1' | b'SUCCESS\n\r' |
| b':MEASure:ADD PERiod' | b'SUCCESS\n\r' |
| b':MEASure:DELete MAX' | b'FIALED\n\r' |
| b':MEASure:PERiod?' | b'?\n\r' |
| b':MEASure:FREQuency?' | b'?\n\r' |
| b':MEASure:AVERage?' | b'0.0\n\r' |
| b':MEASure:MAX?' | b'0.0\n\r' |
| b':MEASure:MIN?' | b'0.0\n\r' |
| b':MEASure:VTOP?' | b'?\n\r' |
| b':MEASure:VBASe?' | b'?\n\r' |
| b':MEASure:VAMP?' | b'?\n\r' |
| b':MEASure:PKPK?' | b'0.0\n\r' |
| b':MEASure:CYCRms?' | b'0.0\n\r' |
| b':MEASure:RTIMe?' | b'?\n\r' |
| b':MEASure:FTIMe?' | b'?\n\r' |
| b':MEASure:PDUTy?' | b'?\n\r' |
| b':MEASure:NDUTy?' | b'?\n\r' |
| b':MEASure:PWIDth??' | b'?\n\r' |
| b':MEASure:NWIDth??' | b'?\n\r' |
| b':MEASure:OVERshoot?' | b'?\n\r' |
| b':MEASure:PREShoot?' | b'?\n\r' |
| b':MEASure:RDELay?' | b'0.0\n\r' |
| b':MEASure:FDELay?' | b'0.0\n\r' |
| b':ACQuire:TYPE AVERage' | b'SUCCESS\n\r' |
| b':ACQuire:AVERage 64' | b'SUCCESS\n\r' |
| b':ACQuire:MDEPth 10K' | b'SUCCESS , 10k\n\r' |
| b':TIMebase:SCALe 200us' | b'SUCCESS , 200us\n\r' |
| b':TIMebase:HOFFset 50' | b'SUCCESS\n\r' |
| b':FFT:DISPlay ON' | b'SUCCESS\n\r' |
| b':FFT: FREQbase 10MHz' | b'FIALED\n\r' |
| b':FFT:FORMat VRMS 0.5' | b'SUCCESS\n\r' |
| b':FFT:FORMat DB 2DB' | b'SUCCESS\n\r' |
| b':FFT:WINDow RECTangle' | b'SUCCESS\n\r' |
| b':FFT:ZONE X5' | b'SUCCESS\n\r' |
| b':CHANnel1:DISPlay ON' | b'SUCCESS\n\r' |
| b':CHANnel1:COUPling DC' | b'SUCCESS\n\r' |
| b':CHANnel1:PROBe X10' | b'SUCCESS\n\r' |
| b':CHANnel1:SCALe 0.5' | b'SUCCESS\n\r' |
| b':CHANnel1:OFFSet 25' | b'SUCCESS,Valid Set:25\n\r' |
| b':CHANnel1: HARDfreq?' | b'<2Hz\n\r' |
| b':CHANnel1: INVerse ON' | b'SUCCESS\n\r' |
| b':CHANnel1:CURRent ON' | b'SUCCESS\n\r' |
| b':TRIGger:TYPE SINGle' | b'SUCCESS\n\r' |
| b':TRIGger:MODE NORMal' | b'SUCCESS\n\r' |
| b':TRIGger:SINGle VIDeo' | b'SUCCESS\n\r' |
| b':TRIGger:ALT VIDeo' | b'SUCCESS\n\r' |
| b':TRIGger:SINGle:EDGE:SOURce CH2' | b'SUCCESS\n\r' |
| b':TRIGger:SINGle:EDGE:SLOPe FALL' | b'SUCCESS\n\r' |
| b':TRIGger:SINGle:EDGE:LEVel 25' | b'SUCCESS\n\r' |
| b':TRIGger:SINGle:VIDeo:SOURce CH2' | b'SUCCESS\n\r' |
| b':TRIGger:SINGle:VIDeo:MODU NTSC' | b'SUCCESS\n\r' |
| b':TRIGger:SINGle:VIDeo:SYNC ODD' | b'SUCCESS\n\r' |
| b':TRIGger:SINGle:VIDeo:LNUM 100' | b'NOT ENABLE TO ADJUST\n\r' |
| b':TRIGger:ALT:EDGE:SOURce CH2' | b'SUCCESS\n\r' |
| b':TRIGger:ALT:EDGE:SLOPe FALL' | b'SUCCESS\n\r' |
| b':TRIGger:ALT:EDGE:LEVel 50' | b'SUCCESS\n\r' |
| b':TRIGger:ALT:VIDeo:SOURce CH2' | b'SUCCESS\n\r' |
| b':TRIGger:ALT:VIDeo:MODU NTSC' | b'SUCCESS\n\r' |
| b':TRIGger:ALT:VIDeo:SYNC ODD' | b'SUCCESS\n\r' |
| b':TRIGger:ALT:VIDeo:LNUM100' | b'NOT ENABLE TO ADJUST\n\r' |
| b':SAVE:CSV C:\\TMP\\test.csv' | b'TRANSMITSSION DONE SAVED @ C:\\TMP\\test.csv\n\r' |
| b':SAVE:IMAGe C:\\TMP\\test.png' | b'TRANSMITSSION DONE SAVED @ C:\\TMP\\test.png\n\r' |
| b':SAVE:IMAGe:INVert ON' | b'Turn on the reverse color function\n\r' |
| b':CURSor:HORizontal:DISPlay ON' | b'timeline cursor turned on\n\r' |
| b':CURSor:HORizontal:BAR1 500' | b'Set up X1 500px successfully\n\r' |
| b':CURSor:VERTical:DISPlay ON' | b'Y axis cursor turned on\n\r' |
| b':CURSor:HORizontal:BAR1 250' | b'Set up X1 250px successfully\n\r' |
| b':CURSor:SOURce CH1' | b'Set CH1 successfully\n\r' |
| b':CURSor:X1?' | b'800.0 us\n\r' |
| b':CURSor:XDELta?' | b'1.600 ms\n\r' |
| b':CURSor:IXDELta?' | b'625.0 Hz\n\r' |
| b':CURSor:Y1?' | b'5.000A\n\r' |
| b':CURSor:YDELta?' | b'20.00A\n\r' |
次回に続く。