Specifications

Appendix B - Smart-Frame Protocol II Function Reference CARROLL TOUCH
B-20 Touch System Programmer’s Guide
The SetReportTransferMode (22H) command is an overloaded
command.
• If the host sends only the SetReportTransferMode (22H) command
number, the ReportTransferMode SFP-II global parameter is not
modified and the ReportTransferMode report is sent to report the
current state of the ReportTransferMode SFP-II global parameter.
• If the host sends the entire SetReportTransferMode command
including the ReportTransferMode parameter, the
ReportTransferMode SFP-II global parameter is modified and the
Report Transfer Mode Report is sent to report the current state of
the ReportTransferMode SFP-II global parameter.
• If the host sends the SetReportTransferMode (22H) command
number with any other combination of parameters, an invalid
parameter error is returned in Cmderr.
If the SetReportProperties (21H) command attempts to set the
ReportTransferMode SFP-II global parameter to a value other than
enabled or disabled, an invalid parameter error is returned in Cmderr.
The primary purpose of the SetReportTransferMode (22H) command is
to provide the host computer with the means to implement software
flow control in the touch system-to-host direction. The host may use the
SetReportTransferMode (22H) command to inhibit report transfer from
the touch system when necessary, as in the case where the host’s input
buffer is about to overflow. The host must allow for the
SetReportTransferMode report packet that is sent by the touch system
in response to the SetReportTransferMode (22H) command.
Command Format
22
or
22 ReportTransferMode
ReportTransferMode
= Specifies the value to which the ReportTransferMode
SFP-II global parameter is to be set. Legal values for the
report transfer mode parameter are:
00 = Disabled. The transfer of unsolicited reports from
the touch system to the host is inhibited.
01 = Enabled. The transfer of both solicited and
unsolicited reports from the touch system to the
host is unaffected.
The ReportTransferMode SFP-II global
parameter is a shared parameter and corresponds