User manual

F1 LV Evaluation Platform Overview
2012 Microchip Technology Inc. DS41629A-page 19
1.4.7.1 CATASTROPHIC RECOVERY
In the unlikely event the UNI/O memory becomes erased or damaged, the memory can
be completely restored with the File->Restore->(add-on type)
option. This option
should only be used if the add-on board fails the automatic detection process. Take
care to select the add-on type corresponding to the attached board. Failure to do so will
cause unexpected operation possibly resulting in permanent damage to the add-on
board hardware.
1.4.8 Hints for Optimum Performance
The BLDC and stepper motors are interrupt driven. The motor commutation interrupts
take precedence over all other operations. All services other than the motor commuta-
tion are polled. When the motor is operating at very rapid commutation rates, the time
for other services can become severely limited. For most situations, the serial link ser-
vice is able to keep up with the activity from the PC. However, when a rapid series of
commands is coupled with rapid commutations, the serial link can appear to stall. To
avoid this situation, use the slider controls for only small and slow changes. Enter num-
bers directly into the slider text box when a large change to the slider control is desired.
If a stalled control condition occurs, try to regain control by clicking on the red STOP
button. If that does not restore control, the last resort is to press the F1 LV Evaluation
Platform MCLR button.
1.4.9 Header File Versus GUI Motor Parameters
The default motor parameters are defined in the F1 LV Evaluation Platform source code
motor header files. The following table correlates the GUI parameters with the equiva-
lent header file parameters. The conversion factor is the value by which the header file
parameter is multiplied to derive the GUI parameter. In all cases, whether in the table
or text, parameters expressed as all caps may be found exactly as shown in the header
files.
See Appendix B. “Conversion Factors” for more information on the parameters and
the associated conversion factors.