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# Defines basic Tcl procs for OpenOCD JTAG module
# Executed during "init". Can be overridden
# by board/target/... scripts
proc jtag_init {} {
if {[catch {jtag arp_init} err]!=0} {
# try resetting additionally
init_reset startup
}
}
# This reset logic may be overridden by board/target/... scripts as needed
# to provide a reset that, if possible, is close to a power-up reset.
#
# Exit requirements include: (a) JTAG must be working, (b) the scan
# chain was validated with "jtag arp_init" (or equivalent), (c) nothing
# stays in reset. No TAP-specific scans were performed. It's OK if
# some targets haven't been reset yet; they may need TAP-specific scans.
#
# The "mode" values include: halt, init, run (from "reset" command);
# startup (at OpenOCD server startup, when JTAG may not yet work); and
# potentially more (for reset types like cold, warm, etc)
proc init_reset { mode } {
jtag arp_init-reset
}
#########
# TODO: power_restore and power_dropout are currently neither
# documented nor supported except on ZY1000.
proc power_restore {} {
puts "Sensed power restore, running reset init and halting GDB."
reset init
# Halt GDB so user can deal with a detected power restore.
#
# After GDB is halted, then output is no longer forwarded
# to the GDB console.
set targets [target names]
foreach t $targets {
# New event script.
$t invoke-event arp_halt_gdb
}
}
add_help_text power_restore "Overridable procedure run when power restore is detected. Runs 'reset init' by default."
proc power_dropout {} {
puts "Sensed power dropout."
}
#########
# TODO: srst_deasserted and srst_asserted are currently neither
# documented nor supported except on ZY1000.
proc srst_deasserted {} {
puts "Sensed nSRST deasserted, running reset init and halting GDB."
reset init
# Halt GDB so user can deal with a detected reset.
#
# After GDB is halted, then output is no longer forwarded
# to the GDB console.
set targets [target names]
foreach t $targets {
# New event script.
$t invoke-event arp_halt_gdb
}
}
add_help_text srst_deasserted "Overridable procedure run when srst deassert is detected. Runs 'reset init' by default."
proc srst_asserted {} {
puts "Sensed nSRST asserted."
}
# measure actual JTAG clock
proc measure_clk {} {
set start_time [ms];
runtest 10000000;
echo "Running at more than [expr 10000.0 / ([ms]-$start_time)] kHz";
}
add_help_text measure_clk "Runs a test to measure the JTAG clk. Useful with RCLK / RTCK."
# BEGIN MIGRATION AIDS ... these adapter operations originally had
# JTAG-specific names despite the fact that the operations were not
# specific to JTAG, or otherewise had troublesome/misleading names.
#
# FIXME phase these aids out after about April 2011
#
proc jtag_khz args { eval adapter_khz $args }
proc jtag_nsrst_delay args { eval adapter_nsrst_delay $args }
proc jtag_nsrst_assert_width args { eval adapter_nsrst_assert_width $args }
# END MIGRATION AIDS
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