Spectrum M2i.60xx, Руководство по оборудованию

Страница: 92 / 136

92 M2i.60xx / M2i.60xx-exp Manual
Trigger masks Trigger modes and appendant registers
The table below shows the relating register for the general OR mask and the possible constants that can be written to it.
The following example shows, how to setup the OR mask, for an external TTL trigger. As an example a simple edge detection has been
chosen. The explanation and a detailed description of the different trigger modes for the external TTL trigger inputs will be shown in the ded-
icated passage within this chapter.
The table below is showing the registers for the channel OR mask and the possible constants that can be written to it.
Please note that channel trigger sources are only available on data acquisition cards and not on pure generator
cards. If you have purchased an arbitary waveform generator or a pattern generator please just ignore this part.
The following example shows, how to setup the OR mask, for an external TTL trigger. As an example a simple edge detection has been
chosen. The explanation and a detailed description of the different trigger modes for the external TTL trigger inputs will be shown in the ded-
icated passage within this chapter.
Register Value Direction Description
SPC_TRIG_AVAILORMASK 40400 read Bitmask, in which all bits of the below mentioned sources for the OR mask are set, if available.
SPC_TRIG_ORMASK 40410 read/write Defines the events included within the trigger OR mask of the card.
SPC_TMASK_NONE 0 No trigger source selected
SPC_TMASK_SOFTWARE 1h Enables the software trigger for the OR mask. The card will trigger immediately after start.
SPC_TMASK_EXT0 2h Enables the external trigger0 for the OR mask. The card will trigger when the programmed condition for this input is
valid.
SPC_TMASK_EXT1 4h Enables the external trigger1 for the OR mask. This input is only available on digital cards. The card will trigger when
the programmed condition for this input is valid.
SPC_TMASK_XIO0 100h Enables the extra TTL trigger 0 for the OR mask. On plain cards this input is only available if the option BaseXIO is
installed. As part of the digitizerNETBOX this input is available as connector Trigger B.
SPC_TMASK_XIO1 200h Enables the extra TTL trigger 1 for the OR mask. This input is only available if the option BaseXIO is installed.
spcm_dwSetParam_i32 (hDrv, SPC_TRIG_ORMASK, SPC_TMASK_EXT0); // Enable external trigger within the OR mask
spcm_dwSetParam_i32 (hDrv, SPC_TRIG_EXT0_MODE, SPC_TM_POS); // Setting up external TTL trigger for rising edges
Register Value Direction Description
SPC_TRIG_CH_AVAILORMASK0 40450 read Bitmask, in which all bits of the below mentioned sources/channels (0…31) for the channel OR mask
are set, if available.
SPC_TRIG_CH_AVAILORMASK1 40451 read Bitmask, in which all bits of the below mentioned sources/ channels (32…63) for the channel OR
mask are set, if available.
SPC_TRIG_CH_ORMASK0 40460 read/write Includes the analog or digital channels (0…31) within the channel trigger OR mask of the card.
SPC_TRIG_CH_ORMASK1 40461 read/write Includes the analog or digital channels (32…63) within the channel trigger OR mask of the card.
SPC_TMASK0_CH0 1h Enables channel0 (channel32) for recognition within the channel OR mask.
SPC_TMASK0_CH1 2h Enables channel1 (channel33) for recognition within the channel OR mask.
SPC_TMASK0_CH2 4h Enables channel2 (channel34) for recognition within the channel OR mask.
SPC_TMASK0_CH3 8h Enables channel3 (channel35) for recognition within the channel OR mask.
… … …
SPC_TMASK0_CH28 10000000h Enables channel28 (channel60) for recognition within the channel OR mask.
SPC_TMASK0_CH29 20000000h Enables channel29 (channel61 for recognition within the channel OR mask.
SPC_TMASK0_CH30 40000000h Enables channel30 (channel62) for recognition within the channel OR mask.
SPC_TMASK0_CH31 80000000h Enables channel31 (channel63) for recognition within the channel OR mask.
spcm_dwSetParam_i32 (hDrv, SPC_TRIG_CH_ORMASK0, SPC_TMASK_CH0); // Enable channel0 trigger within the OR mask
spcm_dwSetParam_i32 (hDrv, SPC_TRIG_EXT0_MODE, SPC_TM_POS); // Setting up external trigger for rising edges