The Olimex ARM-USB-OCD JTAG supports serial over usb. To use it, first install a usb-serial driver. Then connect to the virtual com port with the following settings:
38400, 8, N, 1
Download
curl -k -O https://alioth.debian.org/frs/download.php/3195/minicom-2.4.tar.gz
MicroC/OS-II - uC/OS-II
newlib
Enter search terms.