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A project log for Team Ides: DC27 / da Bomb!

A wearable, hackable, blinky badge for Defcon27 featuring RGB leds, sound, BLE, games, and more!

john-adamsJohn Adams 09/13/2018 at 00:490 Comments

Hey! Welcome back friends! It's been awhile! Let's get going again. 

We're just getting started this week and we were able to get ChibiOs running on our nrf52840 development board. Now, this is step 1 of about 10,000, but getting to blinky is half the battle and we're there. 

Last year we wanted to use the NRF58240. I'm glad we decided not to do a badge last year because the chips were not available in the quantity we needed them by DC26. Aborting was probably the right thing to do. 

However, we're very excited about using this chip now. It's available. It's QFN, it's going to be much easier to work with than the KW01 we used for DC25. It's even available in a module and it is quite powerful for the low low price of about $4.90 in quantity.

Dual SPI busses mean we can pump out more frames per second, and built-in I2S mean that supporting clean stereo sound is going to be an achievable goal if we get our analog circuity right. Additionally, having 256KB of RAM (up from last year's 128KB will mean more apps, and more things we can do. 

Over the next couple of weeks we will order screens and LED controllers to experiment with, and start to work through the hard problems like "what's it going to really look like?" and "what sort of games will it support?"

We're sticking with ChibiOs because 1) we know it and 2) we liked working with it last time. 

We'll keep you posted, and don't worry, we're not going to reveal everything that's coming before DC27. 

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