I've been dabbling with creating my own circuit boards for a while now. I recently used KiCad to design this audio DAC circuit board. I had the board manufactured by OSHPark and assembled it myself using a solder paste stencil and my DIY solder reflow oven.

The board plays audio using a typical 3…

I’ve been working with ARM Cortex-M4 microprocessors for a little over a year and a half now. Despite reading popular embedded books and blogs, I have yet to come across an end-to-end overview of the creation and execution of a program.

For my own education and reference I’ve created such a docume…

A number of the STM32 development boards come equipped with a MEMS gyroscope and accelerometer. As shown in the video below, I've written software which displays values from both of these devices in realtime.

In my example, I'm using an STM32F411 development board. As shown on the databri…

I've been working on a number of smaller STM32 projects to get to know the processsor and peripherals better. These include UART communication, DMA, configuring various interrupts, clock speeds and more.

These projects can be found in my GitHub repo. They're well commented to explain what the c…

I obtained an STM32F411 development board recently. Among other peripherals, it has a Cirrus CS43L22 audio DAC on the board and a typical 1/8" adapter allowing you to plug in headphones or typical PC speakers as shown below.

Searching the web, I found a couple of code examples using audio with the…