Allied Vision Technologies MF-145B2 Instruction Manual download pdf (Page 147)

Marlin Technical ManualV.2.7.0

147

Controlling image capture

One-shot

Marlin cameras can record an image by setting the one-shot bit in the 61Ch reg-

ister. 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 149),

this flag is ignored.

If one-shot mode is combined with the external trigger, the one-shot command

is used to arm it. The following screenshot shows the sequence of commands

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 to start of

exposure

The following sections describe the time response of the camera using a single

frame (one-shot) command. As set out in the IIDC specification, this is a soft-

ware 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 73: One_shot control

Feature Value

One-shot  Microcontroller-Sync 250 μs (processing time in the

microcontroller)

μC-Sync/ExSync  Integration-Start 8 μs

Table 72: Values for one-shot

1 2 ... 142 143 144 145 146 147 148 149 150 151 152 ... 236 237

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Allied Vision Technologies MF-145B2 Instruction Manual Page 147