-set tran [transport select]
-if [string equal $tran "jtag"] { eval jtag newtap $chip $tag $args}
-if [string equal $tran "swd"] { eval swd newdap $chip $tag $args }
+ if [using_jtag] {
+ eval jtag newtap $chip $tag $args
+ } elseif [using_swd] {
+ eval swd newdap $chip $tag $args
+ } else {
+ echo "Error: transport '[ transport select ]' not supported by swj_newdap"
+ shutdown
+ }