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ChipScope Pro Software and Cores User Guide
UG029 (v14.3) October 16, 2012
Chapter 5:
ChipScope Engine Tcl Interface
::chipscope::csejtag_target pulse_pin
This subcommand pulses the value of a JTAG TAP pin for a previously opened and locked
JTAG target device.
Note:
The JTAG target must be locked by using the
::chipscope::csejtag_target lock
subcommand before calling this subcommand.
If using this function to change the JTAG TAP state, please be aware that the CseJtag Tcl
library does not keep track of the JTAG TAP state. Before using any of the
::chipscope::csejtag_tap
subcommands, use the
:
:chipscope::csejtag_tap
navigate
subcommand to set the JTAG TAP state machine to the
$CSEJTAG_TEST_LOGIC_RESET
state.
Syntax
::chipscope::csejtag_target pulse_pin handle pin count
Arguments
Returns
An exception is thrown if the subcommand fails.
Example
Pulse the TCK pin five times.
%::chipscope::csejtag_target pulse_pin $handle $CSEJTAG_TCK 5
Back to list of all CseJtag Tcl Commands
Table 5-24:
Arguments for Subcommand ::chipscope::csejtag_target pulse_pin
Argument
Type
Description
handle
Required
Handle to the session that is returned by
::chipscope::csejtag_session create
.
pin
JTAG TAP pin identifier {
$CSEJTAG_TMS |
$CSEJTAG_TCK | $CSEJTAG_TDI}
.
count
Number of times to pulse the JTAG TAP pin (pulse means
driving a
0
, then a
1
, then a
0
on the pin).
