Received the AVRopendous2-DIP from Opendous, Inc. today, and as promised, here are some pictures of the board. For now I’ve just plugged it in and tested the pre-programmed Keyboard Test demo, which displays the pin name when you ground a pin. It’s always nice to have a way to verify a development board is working out of the box, before moving on to programming and new development.
This board is the ‘nh’ version, without headers. (Nice bonus, since I like to solder pins on the top side and use jumper wires to connect other boards.)
In the pictures you can see the handy 5v/3v3 selector jumper. Note also the 1.27mm pitch JTAG connector in the center, which seems to me like a bit of an afterthought. The other side of the through-holes are hidden behind the ATmega32U4, so it seems like it would be a challenge to solder on any sort of connector. Fortunately, as the included instruction sheet points out, all of the JTAG pins are accessible on the outside 2.54mm pins as well.
One other difference from the Teensy board is the additional HWB button to trigger the bootloader. This means it’s possible to reset the ATmega32U4 without triggering bootloader mode, also I believe the HWB button can be used as an input after the bootloader has handed off control to the main program.
Post a Comment