tcl/target/at91sam4XXX.cfg

   1 # script for ATMEL sam4, a CORTEX-M4 chip
   2 #
   3
   4 if { [info exists CHIPNAME] } {
   5    set _CHIPNAME $CHIPNAME
   6 } else {
   7    set _CHIPNAME sam4
   8 }
   9
  10 if { [info exists ENDIAN] } {
  11    set _ENDIAN $ENDIAN
  12 } else {
  13    set _ENDIAN little
  14 }
  15
  16 # JTAG speed should be <= F_CPU/6. F_CPU after reset is 4 MHz, so use F_JTAG = 0.5MHz
  17 #
  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.
  22
  23 adapter_khz 500
  24
  25 adapter_nsrst_delay 100
  26 jtag_ntrst_delay 100
  27
  28 #jtag scan chain
  29 if { [info exists CPUTAPID] } {
  30    set _CPUTAPID $CPUTAPID
  31 } else {
  32    set _CPUTAPID 0x4ba00477
  33 }
  34
  35 jtag newtap $_CHIPNAME cpu -irlen 4 -ircapture 0x1 -irmask 0xf -expected-id $_CPUTAPID
  36
  37 set _TARGETNAME $_CHIPNAME.cpu
  38 target create $_TARGETNAME cortex_m -endian $_ENDIAN -chain-position $_TARGETNAME
  39
  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
  42
  43 $_TARGETNAME configure -event gdb-flash-erase-start {
  44     halt
  45 }
  46
  47 # if srst is not fitted use SYSRESETREQ to
  48 # perform a soft reset
  49 cortex_m reset_config sysresetreq