2 # script for ATMEL samdXX, a CORTEX-M0 chip
6 # samdXX devices only support SWD transports.
8 source [find target/swj-dp.tcl]
10 if { [info exists CHIPNAME] } {
11 set _CHIPNAME $CHIPNAME
13 set _CHIPNAME at91samd
16 if { [info exists ENDIAN] } {
22 # Work-area is a space in RAM used for flash programming
24 if { [info exists WORKAREASIZE] } {
25 set _WORKAREASIZE $WORKAREASIZE
27 set _WORKAREASIZE 0x800
30 if { [info exists CPUTAPID] } {
31 set _CPUTAPID $CPUTAPID
33 set _CPUTAPID 0x4ba00477
36 swj_newdap $_CHIPNAME cpu -irlen 4 -expected-id $_CPUTAPID
38 set _TARGETNAME $_CHIPNAME.cpu
39 target create $_TARGETNAME cortex_m -endian $_ENDIAN -chain-position $_TARGETNAME
41 $_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
43 # JTAG speed should be <= F_CPU/6. F_CPU after reset is 4 MHz, so use F_JTAG = 0.5MHz
45 # Since we may be running of an RC oscilator, we crank down the speed a
46 # bit more to be on the safe side. Perhaps superstition, but if are
47 # running off a crystal, we can run closer to the limit. Note
48 # that there can be a pretty wide band where things are more or less stable.
51 adapter_nsrst_delay 100
54 # if srst is not fitted use SYSRESETREQ to
55 # perform a soft reset
56 cortex_m reset_config sysresetreq
59 set _FLASHNAME $_CHIPNAME.flash
60 flash bank $_FLASHNAME at91samd 0x00000000 0 1 1 $_TARGETNAME