1 # script for ATMEL sam3, a CORTEX-M3 chip
27 if { [info exists CHIPNAME] } {
28 set _CHIPNAME $CHIPNAME
33 if { [info exists ENDIAN] } {
39 # JTAG speed should be <= F_CPU/6. F_CPU after reset is 4 MHz, so use F_JTAG = 0.5MHz
41 # Since we may be running of an RC oscilator, we crank down the speed a
42 # bit more to be on the safe side. Perhaps superstition, but if are
43 # running off a crystal, we can run closer to the limit. Note
44 # that there can be a pretty wide band where things are more or less stable.
48 adapter_nsrst_delay 100
52 if { [info exists CPUTAPID] } {
53 set _CPUTAPID $CPUTAPID
55 set _CPUTAPID 0x4ba00477
58 jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
60 set _TARGETNAME $_CHIPNAME.cpu
61 target create $_TARGETNAME cortex_m -endian $_ENDIAN -chain-position $_TARGETNAME
63 # 16K is plenty, the smallest chip has this much
64 $_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size 16384 -work-area-backup 0
66 $_TARGETNAME configure -event gdb-flash-erase-start {
70 # if srst is not fitted use SYSRESETREQ to
71 # perform a soft reset
72 cortex_m reset_config sysresetreq
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