#uartinterface

[adafruit]

CP2105 dual UART breakout 🔌💻

Sometimes, you need more than one UART for interfacing with hardware. So instead of getting two CP2102 breakouts

you could use this CP2105

chip. We exposed the two CDC UARTs on either side plus the modem control signals so you could use this for bootloading various microcontrollers. Coming soon!

[adafruit]

TMC2209 stepper motor driver board testing 🤖⚙️🔋

We've been testing the Trinamic/Maxim/Analog/WeylandYutani TMC2209 (https://www.digikey.com/short/8r5m38h8) breakout we designed, and it's working great - the step/dir interface plus the micro-step select allows a microcontroller to control a stepper with just GPIO and true-to-its-name it is a very silent stepper driver, much quieter than the A4988 (https://www.digikey.com/short/tfjt88dd)! There are a few different I/O pins on the TMC: Index tells you when a full step is completed, which is handy to know when you want to change stepper modes on the fly. Diag lets you know when a power or motor failure has occurred. It can also tell when the motor has stalled if it's configured to. Finally, and most interestingly, is the UART interface: this unidirectional pin lets you read and write configuration registers, set 1-128 microsteps, change current limiting, and detect stalls for 'auto homing'. So far, everything works; we're just going to swap the direction of the potentiometer so it twists clockwise to increase the current limit and book PCBs!