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Controlling image capture
Multi-shot
ISO_Enable / free-run
Asynchronous broadcast
Setting multi-shot and entering a quantity of images in Count_Number in
the 61Ch register enables the camera to record a specified number of images.
The number is indicated in bits 16 to 31. If the camera is put into
ISO_Enable mode (see Chapter
is ignored and deleted automatically once all the images have been recorded.
If multi-shot mode is activated and the images have not yet all been cap-
tured, it can be cancelled by resetting the flag. The same result can be
achieved by setting the number of images to 0.
Multi-shot can also be combined with the external trigger in order to grab a
certain number of images based on an external trigger. This is especially
helpful in combination with the so called Deferred_Mode to limit the num-
ber of grabbed images to the FIFO size.
Setting the MSB (bit 0) in the 614h register (ISO_ENA) puts the camera into
ISO_Enable mode or Continuous_Shot (free-run). The camera captures an
infinite series of images. This operation can be quit by deleting the 0 bit.
The camera accepts asynchronous broadcasts. This involves asynchronous
write requests that use node number 63 as the target node with no acknowl-
edge.
This makes it possible for all cameras on a bus to be triggered by software
simultaneously - e.g. by broadcasting a one-shot. All cameras receive the
one-shot command in the same IEEE 1394 bus cycle. This creates uncertainty
for all cameras in the range of 125 µs.
Inter-camera latency is described in Chapter
page 171.
ISO_Enable / free-run
on page 170), this flag
Jitter at start of exposure
PIKE Technical Manual V4.1.0
on
170
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