| Linux-GPIB 4.3.6 Documentation | ||
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Queries various configuration settings associated with the board or device descriptor ud. The option argument specifies the particular setting you wish to query. The result of the query is written to the location specified by result. To change the descriptor's configuration, see ibconfig().
Table 1. ibask options
| option | value (hexadecimal) | result of query | used for board/device |
|---|---|---|---|
| IbaPAD | 0x1 | GPIB primary address | board or device |
| IbaSAD | 0x2 | GPIB secondary address (0 for none, 0x60 to 0x7e for secondary addresses 0 to 30) | board or device |
| IbaTMO | 0x3 | Timeout setting for io operations (a number from 0 to 17). See ibmto(). | board or device |
| IbaEOT | 0x4 | Nonzero if EOI is asserted with last byte on writes. See ibeot(). | |
| IbaPPC | 0x5 | Parallel poll configuration. See ibppc(). | board |
| IbaREADDR | 0x6 | Useless, included for compatibility only. | device |
| IbaAUTOPOLL | 0x7 | Nonzero if automatic serial polling is enabled. | board |
| IbaCICPROT | 0x8 | Useless, included for compatibility only. | board |
| IbaSC | 0xa | Nonzero if board is system controller. See ibrsc(). | board |
| IbaSRE | 0xb | Nonzero if board autmatically asserts REN line when it becomes the system controller. See ibsre(). | board |
| IbaEOSrd | 0xc | Nonzero if termination of reads on reception of the end-of-string character is enabled. See ibeos(), in particular the REOS bit. | board or device |
| IbaEOSwrt | 0xd | Nonzero if EOI is asserted whenever end-of-string character is sent. See ibeos(), in particular the XEOS bit. | board or device |
| IbaEOScmp | 0xe | Nonzero if all 8 bits are used to match end-of-string character. Zero if only least significant 7 bits are used. See ibeos(), in particular the BIN bit. | board or device |
| IbaEOSchar | 0xf | The end-of-string byte. | board or device |
| IbaPP2 | 0x10 | Nonzero if in local parallel poll configure mode. Zero if in remote parallel poll configure mode. | board |
| IbaTIMING | 0x11 | Number indicating T1 delay. 1 for 2 microseconds, 2 for 500 nanoseconds, 3 for 350 nanoseconds. The values are declared in the header files as the constants T1_DELAY_2000ns, T1_DELAY_500ns, and T1_DELAY_350ns. | board |
| IbaReadAdjust | 0x13 | Nonzero if byte pairs are automatically swapped during reads. | board or device |
| IbaWriteAdjust | 0x14 | Nonzero if byte pairs are automatically swapped during writes. | board or device |
| IbaEventQueue | 0x15 | Nonzero if event queue is enabled. | board |
| IbaSPollBit | 0x16 | Nonzero if the use of the SPOLL bit in ibsta is enabled. | board |
| IbaSendLLO | 0x17 | Nonzero if devices connected to this board are automatically put into local lockout mode when brought online with ibfind() or ibdev(). | board |
| IbaSPollTime | 0x18 | Timeout for serial polls. The value of the result is between 0 and 17, and has the same meaning as in ibtmo(). | device |
| IbaPPollTime | 0x19 | Timeout for parallel polls. The value of the result is between 0 and 17, and has the same meaning as in ibtmo(). | board |
| IbaEndBitIsNormal | 0x1a | Nonzero if END bit of ibsta is set on reception of end-of-string character or EOI. Zero if END bit is only set on EOI. | board or device |
| IbaUnAddr | 0x1b | Nonzero if UNT (untalk) and UNL (unlisten) commands are automatically sent after a completed io operation using this descriptor. | device |
| IbaHSCableLength | 0x1f | Useless, included only for compatibility. | board |
| IbaIst | 0x20 | Individual status bit, a.k.a. 'ist'. | board |
| IbaRsv | 0x21 | The current status byte this board will use to respond to serial polls. | board |
| IbaBNA | 0x200 | For a device: the board index (minor number) of interface board through which the device is being accessed. For a board: the board index of the board itself. | board or device |
| Iba7BitEOS | 0x1000 | Nonzero if board supports 7 bit EOS comparisons. See ibeos(), in particular the BIN bit. This is a Linux-GPIB extension. | board |
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