Basler Vision Technologies Sprint Series, User Manual

Page: 179 / 236

Configuring the Camera
Basler sprint Mono Cameras 169
Exposure Time CSR
Note: The exposure time can be set by writing a floating point value to the Absolute Exposure Time
field or by writing an integer value to the Raw Exposure Time field. See Section 7.2.2.1 on page 164
for an explanation of the difference between these two fields.
Register Base Address: 0x1500
Field Name: Register Status Offset: 0x0000 Size: 1 Byte Type: Read only
Description: The integer value in this field indicates the status of this control and status register:
0x00 = The register is not available
0x01 = The register is available and all related settings are OK
0x80 = A value in the register is set out of range
Field Name: Absolute Exposure Time Offset : 0x0001 Size: 4 Bytes Type : Read/Write
Description: Writing a floating point value to this field sets the exposure time in µs. For example, if the value in
this field is set to 5.2, the exposure time will be 5.2 µs.
The allowed range for the exposure time can vary depending on the camera model and how the
camera is configured. You should check the absolute min and absolute max fields of this register
to determine the allowed range with the current configuration. The increment is 0.1.
The value in this field is a standard IEEE-754 single precision (32 bit) floating point number.
See Chapter 4 on page 67 for more information about exposure time.
Field Name: Absolute Min Offset : 0x0005 Size: 4 Bytes Type : Read only
Description: Minimum allowed floating point value for the absolute exposure time setting. This field is updated
to reflect limitations caused by the way that any related features are set.
The value in this field is a standard IEEE-754 single precision (32 bit) floating point number.
Field Name: Absolute Max Offset : 0x0009 Size: 4 Bytes Type : Read only
Description: Maximum allowed floating point value for the absolute exposure time setting. This field is updated
to reflect limitations caused by the way that any related features are set.
The value in this field is a standard IEEE-754 single precision (32 bit) floating point number.
Field Name: Raw Exposure Time Offset : 0x000D Size: 4 Bytes Type : Read/Write
Description: Writing an integer value to this field sets the exposure time.
The allowed range for this value can vary depending on the camera model and how the camera is
configured. You should check the raw min and raw max fields of this register to determine the
allowed range with the current configuration.
The integer value represents a multiplier, and the actual exposure time is equal to the value in this
field times 0.1 µs. For example, if the value in this field is set to 1200, then:
Exposure Time = 1200 x 0.1 µs
Exposure Time = 120 µs
The bytes in this field are interpreted as follows:
Byte 1 = Low byte of the raw value
Byte 2 = Mid byte of the raw value
Byte 3 = High byte of the raw value
Byte 4 = Always 0 (not used)