2 # Microchip (former Atmel) SAM E54, E53, E51 and D51 devices
3 # with a Cortex-M4 core
7 # Devices only support SWD transports.
9 source [find target/swj-dp.tcl]
11 if { [info exists CHIPNAME] } {
12 set _CHIPNAME $CHIPNAME
17 if { [info exists ENDIAN] } {
23 # Work-area is a space in RAM used for flash programming
24 # By default use 32kB (the smallest RAM size is 128kB)
25 if { [info exists WORKAREASIZE] } {
26 set _WORKAREASIZE $WORKAREASIZE
28 set _WORKAREASIZE 0x8000
31 if { [info exists CPUTAPID] } {
32 set _CPUTAPID $CPUTAPID
34 set _CPUTAPID 0x4ba00477
37 swj_newdap $_CHIPNAME cpu -irlen 4 -expected-id $_CPUTAPID
38 dap create $_CHIPNAME.dap -chain-position $_CHIPNAME.cpu
40 set _TARGETNAME $_CHIPNAME.cpu
41 target create $_TARGETNAME cortex_m -endian $_ENDIAN -dap $_CHIPNAME.dap
43 $_TARGETNAME configure -work-area-phys 0x20000000 -work-area-size $_WORKAREASIZE -work-area-backup 0
45 # SAM DSU will hold the CPU in reset if TCK is low when RESET_N
48 # dsu_reset_deassert configures whether we want to run or halt out of reset,
49 # then instruct the DSU to let us out of reset.
50 $_TARGETNAME configure -event reset-deassert-post {
51 atsame5 dsu_reset_deassert
54 # SRST (wired to RESET_N) resets debug circuitry
55 # srst_pulls_trst is not configured here to avoid an error raised in reset halt
56 reset_config srst_gates_jtag
58 # Do not use a reset button with other SWD adapter than Atmel's EDBG.
59 # DSU usually locks MCU in reset state until you issue a reset command
62 # SAM E5x/D51 runs at SYSCLK = 48 MHz from RC oscillator after reset.
63 # Atmel's EDBG (on-board cmsis-dap adapter of Xplained kits) works
64 # without problem at clock speed over 5000 khz. Atmel recommends
65 # adapter speed less than 10 * CPU clock.
69 # if srst is not fitted use SYSRESETREQ to
70 # perform a soft reset
71 cortex_m reset_config sysresetreq
74 set _FLASHNAME $_CHIPNAME.flash
75 flash bank $_FLASHNAME atsame5 0x00000000 0 1 1 $_TARGETNAME