RTC6 boards
Doc. Rev. 1.0.21 en-US
8 Advanced Functions for Scan Head Control and Laser Control
230
• x and y and rot
If you activate all three options together, then the
two offset correction values must be combined
and supplied as one 32-bit value alternatingly
supplied with the rotation correction value as a
second 32-bit value. The McBSP input values are
likewise alternatingly transferred to internal
memory locations 1 and 2.
The RTC6 identifies the data type by examining
the coding Bit #31 (Bit #31 = 0 for offset values,
Bit #31 = 1 for rotation correction values).
Signed 15 bits are effectively available for
transferring offset values (whereby x values
reside in the lower 16 bits and y values in the
upper 16 bits). 31 bits without sign are available
for rotation correction values.
The last two cases designate the data type by
coding Bit #31. Though this makes the order of
transmission irrelevant, always both data types
nevertheless must be transmitted (preferably
always alternatingly). If a request is made by
apply_mcbsp (or apply_mcbsp_list) when two
values of the same data type exist in both
memory locations, then the most recently
transferred value is always used. If two identical
Bit #31 codings are present, then the last transfer
should have already ended at the time of the
request.
• matrix
With this option activated, matrix coefficients are
then transferable as signed 32-bit values. The
indices are encoded in the data word (see
command description). McBSP input values get
transferred to internal memory location 1.
Notes
• You can use “Local Online Positioning“ in
conjunction with an encoder-controlled
Processing-on-the-fly application, but not in
conjunction with a Processing-on-the-fly
application controlled by McBSP signals:
– When you use the commands for configuring
“Local Online Positioning“, then
Processing-on-the-fly correction activated by
set_fly_x_pos, set_fly_y_pos,
set_fly_rot_pos, set_mcbsp_in,
set_mcbsp_in_list, set_multi_mcbsp_in or
set_multi_mcbsp_in_list gets automatically
deactivated. Subsequently, McBSP input values
are copied to internal memory locations 1 and
2 (see above) and are then available for
“Local Online Positioning“.
– In reverse, set_fly_x_pos, set_fly_y_pos,
set_fly_rot_pos, set_mcbsp_in,
set_mcbsp_in_list, set_multi_mcbsp_in
or
set_multi_mcbsp_in_list de
activate a
previously activated “Local Online Positioning“.
Subsequently, McBSP input values are then
transferred to the internal memory locations 0
to 3 depending on the command and are then
available for the Processing-on-the-fly
application.
– If you switch off (intentionally or with an invalid
scaling factor) “Local Online Positioning“ by
set_mcbsp_x, set_mcbsp_y or
set_mcbsp_rot, then the data is continued to
be copied to internal memory locations 1 or 1
and 2 (as long as data is transmitted), but it is
no longer applied (apply_mcbsp has no
effect).
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