Mercurial > ~darius > hgwebdir.cgi > pyinst
annotate rsib.py @ 49:22187590594b
Turn averaging on otherwise we throw away all but the last sweep.
author | Daniel O'Connor <doconnor@gsoft.com.au> |
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date | Thu, 31 Jan 2013 12:53:22 +1030 |
parents | 226ea06bc050 |
children | 91b476ebc0f2 |
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1 #!/usr/bin/env python |
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2 |
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3 # Copyright (c) 2009 |
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4 # Daniel O'Connor <darius@dons.net.au>. All rights reserved. |
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5 # |
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6 # Redistribution and use in source and binary forms, with or without |
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7 # modification, are permitted provided that the following conditions |
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8 # are met: |
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9 # 1. Redistributions of source code must retain the above copyright |
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10 # notice, this list of conditions and the following disclaimer. |
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11 # 2. Redistributions in binary form must reproduce the above copyright |
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12 # notice, this list of conditions and the following disclaimer in the |
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13 # documentation and/or other materials provided with the distribution. |
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14 # |
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15 # THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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16 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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17 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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18 # ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE |
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19 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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20 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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21 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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22 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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23 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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24 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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25 # SUCH DAMAGE. |
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26 # |
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27 |
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28 # Reverse engineered from the Linux library & example program at |
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29 # http://epsrv.astro.umk.pl/~ep/irbene/rsib/library/RSIB-Linux.zip |
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30 # |
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31 # There are 2 socket connections for some reason. |
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32 # The first seems to do [nearly] all the work |
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33 # |
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34 # Packets to the instrument |
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35 # On connection: |
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36 # -> 00 00 00 40 |
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37 # <- 00 00 00 40 a0 04 00 00 |
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38 # |
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39 # We need to echo back the last 4 bytes of the reply to a second |
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40 # socket opened to the same port. I don't know what that socket is for |
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41 # though. |
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42 # |
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43 # Send a command: |
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44 # -> 00 00 00 05 90 00 01 2a 49 44 4e 3f .......* IDN? |
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45 # |
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46 # Offs Value Meaning |
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47 # 00 00 ? |
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48 # 01 00 ? |
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49 # 02 00 ? |
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50 # 03 05 Length |
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51 # 04 90 MsgID |
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52 # 05 00 ? |
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53 # 06 03 Seq number |
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54 # 07 2a (*) Cmd byte 0 |
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55 # 08 49 (I) Cmd byte 1 |
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56 # 09 44 (D) Cmd byte 2 |
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57 # 10 4a (N) Cmd byte 3 |
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58 # 10 3f (?) Cmd byte 4 |
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59 # |
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60 # Interactive program seems to cap length at 0x99 but perhaps the |
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61 # first 4 bytes are length. |
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62 # |
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63 # Reply to command: |
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64 # <- 00 00 00 23 80 00 01 52 6f 68 ... |
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65 # |
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66 # Offs Value Meaning |
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67 # 00 00 Length 31..24 |
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68 # 01 00 23..16 |
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69 # 02 00 15..8 |
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70 # 03 23 7..0 |
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71 # 04 80 MsgID |
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72 # 05 00 ? |
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73 # 06 01 Seq number |
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74 |
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75 MSG_HELLO = 0x40 # We send this on connect |
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76 MSG_CMDREP = 0x80 # Reply from the instrument to us |
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77 MSG_CMD = 0x90 # Command to the instrument |
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78 MSG_SRQ = 0x91 # Query SRQ |
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79 |
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80 import exceptions |
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81 import socket |
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82 |
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83 class RSIBDevice(object): |
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84 hello = '\x00\x00\x00\x40' |
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85 docmd = '\x00\x00\x00\x05\x90\x00\x01' |
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86 |
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87 def __init__(self, host, port = None): |
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88 if port == None: |
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89 port = 2525 |
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90 self.host = host |
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91 self.port = port |
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92 |
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93 s1 = socket.socket() |
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94 s1.settimeout(5) |
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95 s1.connect((self.host, self.port)) |
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96 s1.send('\x00\x00\x00\x40') |
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97 rx = '' |
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98 while len(rx) < 8: |
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99 rx = rx + s1.recv(8) |
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100 if rx == '': |
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101 raise exceptions.IOError("EOF from device") |
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102 |
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103 s2 = socket.socket() |
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104 s2.settimeout(5) |
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105 s2.connect((self.host, self.port)) |
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106 s2.send(rx[4:]) |
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107 |
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108 self.s1 = s1 |
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109 self.s2 = s2 |
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110 self.tag = 0 |
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111 |
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112 def write(self, cmd, timeout = 0.5): |
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113 """Send data (string) to the instrument""" |
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114 self.s1.settimeout(timeout) |
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115 |
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116 if len(cmd) > 0x99: |
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117 raise exceptions.ValueError("Command too long") |
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118 |
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119 # Pre-increment for easy comparison in read |
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120 self.tag = (self.tag + 1) & 0xff |
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121 msg = '\x00\x00\x00' + chr(len(cmd)) + '\x90\x00' + chr(self.tag) + cmd |
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122 self.s1.send(msg) |
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123 |
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124 def read(self, timeout = 0.5): |
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125 """Read data from the device, waits for up to timeout seconds for each TCP read""" |
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126 |
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127 self.s1.settimeout(timeout) |
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128 |
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129 # Fetch the header |
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130 rx = '' |
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131 while len(rx) < 7: |
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132 rx = self.s1.recv(7) |
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133 if rx == '': |
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134 raise exceptions.IOError("EOF from device") |
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135 |
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136 if self.tag != ord(rx[6]): |
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137 raise exceptions.IOError("Reply out of order, got 0x%02x expected 0x%02x" % (ord(rx[6]), self.tag)) |
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138 |
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139 rxlen = ord(rx[0]) << 24 | ord(rx[1]) << 16 | ord(rx[2]) << 8 | ord(rx[3]) |
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140 #print "Msg ID 0x%02x" % (ord(rx[4])) |
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141 if False and ord(rx[4]) != MSG_CMDREP: |
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142 raise exceptions.IOError("Unexpected Msg ID 0x%02x" % (ord(rx[4]))) |
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143 |
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144 if ord(rx[5]) != 0: |
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145 print "Mystery byte %d != 0" % (ord(rx[5])) |
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146 # Fetch the actual reply now we know the length |
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147 reply = '' |
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148 while len(reply) < rxlen: |
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149 rx = self.s1.recv(rxlen) |
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150 if rx == '': |
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151 raise exceptions.IOError("EOF from device") |
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152 reply += rx |
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153 |
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154 return(reply) |
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155 |
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156 def queryrsb(self): |
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157 msg = '\x00\x00\x00\x00\xd1\x18\x00' |
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158 self.s2.send(msg) |
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159 |
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160 reply = '' |
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161 while len(reply) < 7: |
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162 rx = self.s2.recv(7) |
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163 if rx == '': |
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164 raise exceptions.IOError("EOF from device") |
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165 reply += rx |
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166 |
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167 # '\x00\x00\x00\x00\x80\x04\x01' => STB = 4 |
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168 if rx[4] != '\x80': |
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169 raise exceptions.IOError("Incorrect Msg ID in response to STB query") |
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170 |
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171 return ord(rx[5]) |
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172 |
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173 def waitsrq(self): |
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174 msg = '\x00\x00\x00\x00\xb1\x00\x00' |
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175 |
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176 def testsrq(self): |
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177 msg = '\x00\x00\x00\x00\x91\x00\x00' |
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178 self.s2.send(msg) |
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179 reply = '' |
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180 while len(reply) < 7: |
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181 rx = self.s2.recv(7) |
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182 if rx == '': |
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183 raise exceptions.IOError("EOF from device") |
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184 reply += rx |
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185 |
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186 # 00 00 00 00 80 14 08 - SRQ = 0 |
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187 # 00 00 00 00 a0 64 07 - SRQ = 1 |
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188 if rx == '\x00\x00\x00\x00\x80\x14\x08': |
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189 return False |
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190 elif rx == '\x00\x00\x00\x00\xa0\x64\x07': |
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191 return True |
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192 else: |
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193 raise exceptions.IOError("Unknown SRQ byte sequence - " + str(map(ord, rx))) |