In this USB-C series, we’ve covered quite a bit of USB-C – things that are well known, things that should be better known, and a couple things that just appeared online for the first time. We’ve covered almost everything in some depth except USB Power Delivery. I’ve described the process a bit in the “Power” article, but that was mostly about how to use PD by simply buying the right solution. However, that’s not enough for a hacker. Let’s see if we can make our own PD trigger board.
PD Trigger Board In 100 Lines Of Python
We’ll start with no pre-existing software stack – we’ll take a PD PHY (physical layer interface) chip, connect it over I2C, toggle its registers ourselves, and do our own packet crafting. I will use MicroPython, because I find it works best for educational purposes; plus, I genuinely like writing Python for hardware tinkering purposes, and I hope you can appreciate the benefits as well.
Our target for today? Getting 9 V voltage out of a USB-C PSU, short and sweet; basically, what every single trigger board out there is built to do. After we reach this target, you’ll be able to create your own trigger boards – but way cooler, customizable, with price likely comparable to a trigger board chip; plus, in Python, no less! Oh, and it will take us under a hundred lines of Python code to get there.
Minimum Hardware Requirements
If you want to follow along, you’ll want the FUSB302 chip, and some kind of MicroPython board. I’m using a RP2040+FUSB302B combination on a devboard of my own design, but an ESP8266 would do just as well. FUSB302B is th ..
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