These are my blogs

and also my life

The new GPIO Interface on the Rasberry PI: libgpiod

2021-05-02 hardware gpio

The GPIO Sysfs Interface is deprecated. The deprecated Sysfs would interact with GPIO using the /sys/class/gpio pseudo-filesytem. The Application ... Read More

Raspberry Pi SPI Explained

2021-04-21 hardware raspberry-pi

This post attempts to provide some finer details when using SPI on Raspberry Pi as it pertains to using the Chip Select pins and multiple SPI ... Read More

Implementing a Timeout for a read in C

2021-04-12 c

Need to wait a specified amount of time for a read call to return before giving up and continuing on? In Unix when we read from a file we can have a ... Read More

Audio Clip Capture by Threshold

2021-04-10 hardware raspberry-pi alsa

Here is a command line tool to capture audio clips based on a threshold. The setup is a microphone attached to a Raspberry Pi. I used multiple ... Read More

Movement in Emacs

2021-04-06 emacs

A little cheat sheet for movement in emacs. Tried to capture all the ways you can move up, down, left and right in a buffer. Moving by Character and ... Read More

BPSK Receiver Theory

2021-02-17 dsp psk

Let’s look at some BPSK Receiver Theory. This is the 3rd post in the PSK Series. We’ll cover the theory before we go into the ... Read More

BPSK Transmitter Implementation

2021-01-24 dsp psk

In the previous post we discussed BPSK Transmit Theory. This post will discuss the implementation of it. This implementation will be in the C ... Read More

BPSK Transmitter Theory

2021-01-14 dsp psk

In this post we’ll get into the theory of Binary Phase Shift Key - BPSK. We’ll then get into the implementation of the transmitter, ... Read More

Convolution Examples

2021-01-11 dsp

Understanding convolution is not complete without some examples to visual the results. These examples are meant to aid in one’s ability to ... Read More

USB 3D Sound on the Raspberry Pi

2021-01-01 unix alsa

I recently bought the USB 3D Sound Card to play around with some C ALSA Programming on the Raspberry Pi. It worked without a problem and wanted to jot ... Read More