projects / sigrok-dumps.git / blame
| Commit | Line | Data |
|---|---|---|
| 55aca15d | 1 | ------------------------------------------------------------------------------- |
| f53468a3 | 2 | GPIB / HP 1631D |
| 55aca15d UH |
3 | ------------------------------------------------------------------------------- |
| 4 | ||
| 5 | This is an example capture of some GPIB traffic on an HP 1631D LA/scope. | |
| 6 | ||
| 7 | Details: | |
| 8 | http://www.rudiswiki.de/wiki9/SigrokDecoderGPIB | |
| 9 | https://github.com/rudi48/sigrok-gpib | |
| 10 | ||
| 11 | ||
| 12 | Logic analyzer setup | |
| 13 | -------------------- | |
| 14 | ||
| 15 | The logic analyzer used was a Saleae Logic16 clone (at 500kHz): | |
| 16 | ||
| 17 | Probe GPIB | |
| 18 | ------------------- | |
| 19 | 0 DIO1 | |
| 20 | 1 DIO2 | |
| 21 | 2 DIO3 | |
| 22 | 3 DIO4 | |
| 23 | 4 DIO5 | |
| 24 | 5 DIO6 | |
| 25 | 6 DIO7 | |
| 26 | 7 DIO8 | |
| 27 | 8 EOI | |
| 28 | 9 DAV | |
| 29 | 10 NRFD | |
| 30 | 11 NDAC | |
| 31 | 12 IFC | |
| 32 | 13 SRQ | |
| 33 | 14 ATN | |
| 34 | 15 REN | |
| 35 | ||
| 36 | ||
| 37 | Data | |
| 38 | ---- | |
| 39 | ||
| 40 | The following is happening on the GPIB bus in this capture: | |
| 41 | ||
| 42 | - Controller sets the GPIB to UNLISTEN and UNTALK (neutral state) | |
| 43 | - Controller sets device with GPIB address number 4 to LISTEN | |
| 44 | - Controller sends command 'ID LF+EOI' to device with GPIB address number | |
| 45 | 4 (request identity string) | |
| 46 | - Controller sets the GPIB to UNLISTEN and UNTALK (neutral state) | |
| 47 | - Controller sets device with GPIB address number 4 to TALK | |
| 48 | - Device with GPIB address number 4 sends the ID string 'HP1631D+EOI' to | |
| 49 | controller | |
| 50 | - Controller sets the GPIB to UNLISTEN and UNTALK (neutral state) | |
| 51 |