32bit Teensy's SWD-debug
The 32 Bit Teensy Boards from PJRC are "a complete USB-based microcontroller development system, in a very small footprint, capable of implementing many types of projects".
However, not everyone can make friends with the HalfKay Bootloader + Teensy Loader - that's how I felt. I like a classic debug interface like JTAG / SWD to load & debug the firmware.
And so I went on a reconnaissance trip to get back to the SWD-debug interface. In addition to wild attempts, I found a solution that works well on all 32-bit Teensy boards with Kinetis KL02Z, which acts as an onboard interface and bootloader, without having to completely remove them.
The special note: the Kinetis KL02Z can be completely deactivated by applying GND on PTA1 / pin 15 (QFN16) - the /RESET-pin of the KL02Z.
Then only the ports required for the SWD-debug interface have to be tapped.
|Teensy LC||Teensy 3.2||Teensy 3.5 / 3.6|
KL02Z.. reset pin
Teensy LC - SWD adoption
Teensy 3.2 - SWD adoption
Teensy 3.6 - SWD adoption
Teensy LC with SWD-connector
Teensy 3.2 with SWD-connector
Teensy 3.6 with SWD-connector