Decoding an EC11 rotary encoder through a Digital IO Expander board, sending direction updates over RS485, and displaying the result on a Raspberry Pi Pico 2 W receiver with an OLED display.
Posts for: #Digital IO
Some Integration Testing
Integration testing the USB-C power input board, RS485 breakout boards, Digital IO Expander board, Raspberry Pi Pico 2W boards, and an EC11 rotary encoder over a 20 m Cat 6 RS485 link.
Digital I/O Expander Testing: Inputs
Testing the input side of the Digital I/O Expander building block board, including shift register reads, input-to-output mirroring, and discovering a silkscreen labelling issue.
Testing the Digital IO Expander and RS485 Building Block Boards
Receiving and beginning bench testing of the Rev A Digital IO Expander and RS485 building block boards, starting with output testing on the Digital IO Expander using a Raspberry Pi Pico 2W and MicroPython.
Sending Boards off for Fabrication
Sending the RS485 non-isolated board and revised Digital I/O Expander Board off for fabrication, while also preparing for future USB-C Power Delivery experiments using STM32 Nucleo development boards.
Digital IO Expander Building Block Board — Part 1
Starting work on a digital IO expander building block board with 8 logic-level inputs, 8 logic-level outputs, output indicator LEDs, and shift-register-based control.