> The Teensy might be the most accessible ARM dev board right now
Disagree. It's nice enough as an Arduino-alike, but it doesn't have any debugging capabilities -- the only commands exposed by the loader[1] are "write block" and "reboot".
As an ARM development board, I'm much more a fan of ST's Discovery series[2]. Most of their boards are in the $10-$20 range, and they all include a USB-based programmer/debugger compatible with open-source tools.
Disagree. It's nice enough as an Arduino-alike, but it doesn't have any debugging capabilities -- the only commands exposed by the loader[1] are "write block" and "reboot".
As an ARM development board, I'm much more a fan of ST's Discovery series[2]. Most of their boards are in the $10-$20 range, and they all include a USB-based programmer/debugger compatible with open-source tools.
[1]: https://www.pjrc.com/teensy/halfkay_protocol.html
[2]: http://www.st.com/stm32discovery