Fri, 25 Jan 2008 21:01:30 +0100
added some hpgl example plots
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cd9efa64f6da
added a gpib module (handle gpib connection)
David Douard <david.douard@logilab.fr>
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1 | """ |
cd9efa64f6da
added a gpib module (handle gpib connection)
David Douard <david.douard@logilab.fr>
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2 | gpib: create serial connection to GPIB-USB device (ProLogix is the |
cd9efa64f6da
added a gpib module (handle gpib connection)
David Douard <david.douard@logilab.fr>
parents:
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3 | only supported device for now). |
cd9efa64f6da
added a gpib module (handle gpib connection)
David Douard <david.douard@logilab.fr>
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4 | """ |
cd9efa64f6da
added a gpib module (handle gpib connection)
David Douard <david.douard@logilab.fr>
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5 | import serial |
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6 | from serial.serialutil import SerialException |
cd9efa64f6da
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7 | import time |
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8 | |
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9 | class ConnectionError(Exception): |
cd9efa64f6da
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10 | pass |
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11 | |
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some code refactoring and several improvements in gpib_plotter (should be more robust & quicker)
David Douard <david.douard@logilab.fr>
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12 | class Constants(object): |
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13 | def __init__(self): |
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14 | self.constants = {} |
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15 | self.descriptions = {} |
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16 | self.rev_constants = {} |
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17 | for v, k, m in self._constants: |
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18 | self.k = v |
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19 | self.constants[v] = k |
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20 | self.rev_constants[k] = v |
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21 | self.descriptions[v] = m |
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22 | |
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23 | def __getitem__(self, k): |
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24 | if isinstance(k, basestring): |
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25 | return self.rev_constants[k] |
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26 | else: |
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27 | return self.constants[k] |
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28 | |
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29 | def get_description(self, k): |
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30 | if isinstance(k, basestring): |
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31 | k = self.rev_constants[k] |
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32 | return self.descriptions[k] |
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33 | |
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34 | |
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35 | class MODE(Constants): |
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36 | _constants = [(1, "CONTROLLER", "Set device as Controller in Charge"), |
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37 | (0, "DEVICE", "Set device as simple listener"), |
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38 | ] |
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39 | # TODO |
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40 | # class STATUS_BYTE(Constants): |
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41 | # # IEEE 488.2 Status Byte constants |
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42 | # MAV = 0x10 # Message AVailable: bit 4 of the Status Byte |
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43 | # ESB = 0x20 # Event Status Bit: bit 5 of the Status Byte |
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44 | # MSS = 0x40 # Master Summary Status bit: bit 6 of the Status Byte (NOT |
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45 | # # sent in response to a serial poll) |
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46 | # RQS = 0x40 # Request Service: bit 6 of the Status Byte (when sent in |
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47 | # # response to a serial poll) |
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48 | # class SESR(Constants): |
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49 | # # SESR constants (Standard Event Status Register) |
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50 | # PON = 0x80 # Power On: Power has been turned On since last register |
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51 | # # read access |
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52 | # URQ = 0x40 # User Request: the user has activated some device control |
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53 | # # (whatever the Remote Local state is) |
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54 | # CME = 0x20 # Command Error |
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55 | # EXE = 0x10 # Execution Error |
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56 | # DDE = 0x08 # Device Dependant Error |
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57 | # QYE = 0x04 # QuerY Error (attempt to read data while Output Queue is |
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58 | # # empty, or data in the OQ was lost) |
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59 | # RQC = 0x02 # Request Control: tell the CiC that the device wants to |
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60 | # # become the CiC |
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61 | # OPC = 0x01 # Operation Complete: device has completed any pending |
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62 | # # operation (ready to accept new commands). This bit is |
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63 | # # generated in response to a OPC command. |
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