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# script for ATMEL sam4, a CORTEX-M4 chip
#
if { [info exists CHIPNAME] } {
set _CHIPNAME $CHIPNAME
} else {
set _CHIPNAME sam4
}
if { [info exists ENDIAN] } {
set _ENDIAN $ENDIAN
} else {
set _ENDIAN little
}
# JTAG speed should be <= F_CPU/6. F_CPU after reset is 4 MHz, so use F_JTAG = 0.5MHz
#
# Since we may be running of an RC oscilator, we crank down the speed a
# bit more to be on the safe side. Perhaps superstition, but if are
# running off a crystal, we can run closer to the limit. Note
# that there can be a pretty wide band where things are more or less stable.
adapter_khz 500
adapter_nsrst_delay 100
jtag_ntrst_delay 100
#jtag scan chain
if { [info exists CPUTAPID] } {
set _CPUTAPID $CPUTAPID
} else {
set _CPUTAPID 0x4ba00477
}
jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
set _TARGETNAME $_CHIPNAME.cpu
target create $_TARGETNAME cortex_m3 -endian $_ENDIAN -chain-position $_TARGETNAME
# 16K is plenty, the smallest chip has this much
$_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size 16384 -work-area-backup 0
$_TARGETNAME configure -event gdb-flash-erase-start {
halt
}
# if srst is not fitted use SYSRESETREQ to
# perform a soft reset
cortex_m3 reset_config sysresetreq
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