I2c

Introduction Last time, we built a circuit together using Verilog to communicate with an I2S device. But we never delved into how to make a waveform for it. Now, don’t get me wrong: if you did the blinky LED example when starting your first projects, this should be easy for you: A square pattern is just zeros and ones A saw pattern is a counter from zero to max A triangle wave is a counter that goes back after hitting max or min values A sine wave is just some CORDIC… Now, we will not be using CORDIC and will not be doing simple counters. I want to show you a couple of tricks to generate a clean sine waveform that you can later compose to create fancier sounds. ...

Introduction As you may know, I’m working on this blog also as a way to log my learning journey. So, to make up for the lack of interesting peripherals on the Arty A7, I bought a set of modules for Arduino. Most of them were quite uninteresting, but I got this I2S DAC module from Adafruit that implements the UDA1334A from NXP (datasheet). This device interests me the most among the ones I got in the assortment, because ever since I was a kid I’ve wanted to make my own guitar effects (in fact, I believe many electronic engineers are born this way, or something similar), so the end goal is quite ambitious as you can see. But let’s start with something easy. ...