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Controlling image capture
OSCAR Technical Manual V2.4.0
113
One-shot
Oscar cameras can record an image by setting the one-shot bit in the 61Ch
register. This bit is automatically cleared after the image is captured. If the
camera is placed in ISO_Enable mode (see Chapter ISO_Enable / free-run on
page 115), this flag is ignored.
If one-shot mode is combined with the external trigger, the one-shot com-
mand is used to arm it. The following screenshot shows the sequence of com-
mands needed to put the camera into this mode. It enables the camera to
grab exactly one image with an external trigger edge.
If there is no trigger impulse after the camera has been armed, one-shot can
be cancelled by clearing the bit.
One-shot command on the bus starting
exposure
The following sections describe the time response of the camera using a sin-
gle frame (one-shot) command. As set out in the IIDC specification, this is
a software command that causes the camera to record and transmit a single
frame.
The following values apply only when the camera is idle and ready for use.
Full resolution must also be set.
Figure 51: One-shot control
Feature Value
One-shot microcontroller sync ≤ 250 µs (processing time in the
microcontroller)
µC-Sync/ExSync integration start 8 µs
Table 39: Values for one-shot