#####CONFIG#####
source [find interface/raspberrypi2-native.cfg]
#set correct swd pins and reset mode
bcm2835gpio_swd_nums 27 17
bcm2835gpio_srst_num 22

transport select swd

set CHIPNAME samd20
source [find target/at91samdXX.cfg]
#set adapter speed
adapter_khz 1000

reset_config srst_only

#####OUTPUT OPENOCD#####
Open On-Chip Debugger 0.10.0+dev-00167-g29cfe9c (2017-07-10-13:29)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html
BCM2835 GPIO nums: swclk = 27, swdio = 17
BCM2835 GPIO config: srst = 22
none separate
adapter speed: 400 kHz
cortex_m reset_config sysresetreq
adapter speed: 1000 kHz
srst_only separate srst_gates_jtag srst_open_drain connect_deassert_srst
Info : BCM2835 GPIO JTAG/SWD bitbang driver
Info : SWD only mode enabled (specify tck, tms, tdi and tdo gpios to add JTAG mode)
Info : clock speed 1001 kHz
Info : SWD DPIDR 0x0014f764
Error: Could not initialize the debug port

#####OUTPUT TELNET#####
> reset halt
Could not initialize the debug port
Target not examined, will not halt after reset!
Could not initialize the debug port
Target not examined yet
Target not examined yet
embedded:startup.tcl:21: Error:
in procedure 'reset'
in procedure 'ocd_bouncer'
in procedure 'ocd_process_reset'
in procedure 'ocd_process_reset_inner' called at file "embedded:startup.tcl", line 248
in procedure 'samd20.cpu' called at file "embedded:startup.tcl", line 331
in procedure 'ocd_bouncer'
in procedure 'samd20.cpu' called at file "embedded:startup.tcl", line 297
in procedure 'ocd_bouncer'
at file "embedded:startup.tcl", line 21

TARGET: samd20.cpu - Not halted
in procedure 'reset'
in procedure 'ocd_bouncer'