1 # script for ATMEL sam4, a CORTEX-M4 chip
4 if { [info exists CHIPNAME] } {
5 set _CHIPNAME $CHIPNAME
10 if { [info exists ENDIAN] } {
16 # JTAG speed should be <= F_CPU/6. F_CPU after reset is 4 MHz, so use F_JTAG = 0.5MHz
18 # Since we may be running of an RC oscilator, we crank down the speed a
19 # bit more to be on the safe side. Perhaps superstition, but if are
20 # running off a crystal, we can run closer to the limit. Note
21 # that there can be a pretty wide band where things are more or less stable.
25 adapter_nsrst_delay 100
29 if { [info exists CPUTAPID] } {
30 set _CPUTAPID $CPUTAPID
32 set _CPUTAPID 0x4ba00477
35 jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
37 set _TARGETNAME $_CHIPNAME.cpu
38 target create $_TARGETNAME cortex_m3 -endian $_ENDIAN -chain-position $_TARGETNAME
40 # 16K is plenty, the smallest chip has this much
41 $_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size 16384 -work-area-backup 0
43 $_TARGETNAME configure -event gdb-flash-erase-start {