I2c

Introduction Last time we did together a circuit using verilog to communicate to a 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 while starting your first projects, this can be easily achievable 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 more fancy sounds. ...

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