Spectrum M2p.59 Series, Руководство по оборудованию, Страница: 108 / 190

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External logic trigger (X1, X2, X3) Trigger modes and appendant registers
External logic trigger (X1, X2, X3)
The three multi purpose I/O lines of the M2p series can be set up as
additional logic (TTL) triggers.
The external logic triggers can be easily combined with the external
analog trigger as well as the channel trigger.The programming of the
masks is shown in the chapters above.
Trigger Mode
Please find the main external (analog) trigger input modes below. A detailed description of the modes follows in the next chapters..
For all external edge and level trigger modes, the OR mask must contain the corresponding input, as the following table shows:
Table 67: Spectrum API: external logic trigger registers and settings for them
Register Value Direction Description
SPC_TRIG_EXT1_AVAILMODES 40501 read Bitmask showing all available trigger modes for external 1 (X1) = logic trigger input
SPC_TRIG_EXT2_AVAILMODES 40502 read Bitmask showing all available trigger modes for external 2 (X2) = logic trigger input
SPC_TRIG_EXT3_AVAILMODES 40503 read Bitmask showing all available trigger modes for external 3 (X3) = logic trigger input
SPC_TRIG_EXT1_MODE 40511 read/write Defines the external trigger mode for the external MMCX connector trigger input. The trigger need to
be added to either OR or AND mask input to be activated.
SPC_TRIG_EXT2_MODE 40512 read/write Defines the external trigger mode for the external MMCX connector trigger input. The trigger need to
be added to either OR or AND mask input to be activated.
SPC_TRIG_EXT3_MODE 40513 read/write Defines the external trigger mode for the external MMCX connector trigger input. The trigger need to
be added to either OR or AND mask input to be activated.
SPC_TM_NONE 00000000h Channel is not used for trigger detection. This is as with the trigger masks another possibility for disabling channels.
SPC_TM_POS 00000001h Sets the trigger mode for external logic (TTL) trigger to detect positive edges.
SPC_TM_NEG 00000002h Sets the trigger mode for external logic (TTL) trigger to detect negative edges.
SPC_TM_BOTH 00000004h Sets the trigger mode for external logic (TTL) trigger to detect positive and negative edges
SPC_TM_HIGH 00000008h Sets the trigger mode for external logic (TTL) trigger to detect HIGH levels.
SPC_TM_LOW 00000010h Sets the trigger mode for external logic (TTL) trigger to detect LOW levels.
SPC_TM_POS | SPC_TM_P -
W_GREATER
4000001h Sets the trigger mode for external logic (TTL) trigger to detect HIGH pulses that are longer than a programmed pulse -
width.
SPC_TM_POS | SPC_TM_P -
W_SMALLER
2000001h Sets the trigger mode for external logic (TTL) trigger to detect HIGH pulses that are shorter than a programmed pulse -
width.
SPC_TM_NEG | SPC_TM_P -
W_GREATER
4000002h Sets the trigger mode for external logic (TTL) trigger to detect LOW pulses that are longer than a programmed pulse -
width.
SPC_TM_NEG | SPC_TM_P -
W_SMALLER
2000002h Sets the trigger mode for external logic (TTL) trigger to detect LOW pulses that are shorter than a programmed pulse -
width.
Table 68: Spectrum API: trigger OR mask register an settings for external logic trigger
Register Value Direction Description
SPC_TRIG_ORMASK 40410 read/write Defines the OR mask for the different trigger sources.
SPC_TMASK_EXT1 4h Enable logic trigger X1 input for the OR mask
SPC_TMASK_EXT2 8h Enable logic trigger X2 input for the OR mask
SPC_TMASK_EXT3 10h Enable logic trigger X3 input for the OR mask
Image 62: trigger engine overview and multi purpose trigger