In a previous post, I described ‘EDLA’, a WiFi-based logic analyser unit, that uses a Web-based display. That version used an ESP32 to provide WiFi connectivity; the PEDLA uses a Pi PicoW module instead.
Hardware
The hardware is similar to the previous version; aside from the CPU change, the main addition is a 24LC256 serial EEPROM, that is used to store the non-volatile configuration parameters. The Pico flash memory can’t be used for this task, since it is bulk-erased at the start of every programming cycle. The parameters are set using a simple serial console interface.
Firmware
The firmware is written in C; networking is implemented using the picowi WiFi driver, combined with the Mongoose TCP/IP stack; follow these links for more information. The source code is on github here.
Copyright (c) Jeremy P Bentham 2024. Please credit this blog if you use the information or software in it.
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