User`s guide

64 ? Sample Programs
7.3.4 Trigger Mode Data I/O through DMA Data Transfer or Interrupt operation
This kind of programs is used to demonstrate how to use PCIS-DASK to operate Trigger Mode data I/O through DMA
data transfer or Interrupt operation. Except an additional input item, postCount, the running steps and the main screen
of this kind of programs (Figure 7.6) are almost the same as those mentioned in section 7.3.2 (For Single-Buffer Mode)
or section 7.3.3 (For Double-Buffer Mode). Please refer to these two sections for the details. This additional item,
postCount , represents the number of data accessed after a specific trigger event or the counter value for deferring to
access data after a specific trigger event. Please refer to the description of AI configuration functions (AI_9111_Config,
AI_9118_Config, AI_9812_Config) for the details.
Figure 7.6
Note: Except VB9812, all the trigger mode data acquisition sample programs use external digital trigger source
to provide trigger signal. Please refer to the user’s manuals of these cards you want to operate for the
detailed description of trigger mode data acquisition.