Posts
Counting CPU cycles on ESP32-C3 and ESP32-C6 microcontrollers
In this post I discuss how to count the number of CPU cycles spent executing code on the ESP32-C3 and ESP32-C6 microcontrollers, and why you might want to do that. I work through a small example of measuring the CPU cycles spent executing a number of iterations of a simple loop, and describe how we can use the results to build a model describing how many CPU cycles are required for each instruction in the loop.
Designing an electrical circuit for connecting to Ethernet 10BASE-T
In this post I discuss an electrical circuit design for connecting a microcontroller to an Ethernet 10BASE-T network using a differential transceiver. I then describe how to perform a rudimentary validation of the electrical circuit using a few lines of code and an oscilloscope. This post is part of a series of posts relating to Niccle, my Ethernet 10BASE-T bit banging project.
An overview of Ethernet 10BASE-T
In this post I provide a high-level overview of how Ethernet works, focusing on the 10BASE-T variant in particular. I'll discuss Ethernet's electrical characteristics, and I'll describe how the Ethernet spec is divided into two major layers: the physical (PHY) and the medium access control (MAC) layers, each of which focuses on a different set of responsibilities. This post is part of a series of posts relating to Niccle, my Ethernet 10BASE-T bit banging project.