Introduction In this blog entry I will demonstrate how one can access the Raspberry Pi’s GPIO in C++. There are two approaches to accomplish this. The first is to directly manipulate the Raspberry Pi’s GPIO’s registers much like one would do when programming a microcontroller without an operating system (OS) or a memory management unit […]
Introduction to accessing the Raspberry Pi’s GPIO in C++ (sysfs) Read More »
I needed to control a DC motor from my Raspberry Pi’s GPIO port as part of my time-lapse dolly project. I had to be able to turn the motor on for approximately 150ms which would in turn move the dolly along by 3mm. Parts 12VDC Mini High Torque Motor – Max 50mA at full load
Simple way to control 12V DC Motor using Raspberry Pi’s GPIO port and NPN transistor Read More »
During the daily device driver development routine, we often need to understand the behavior of the GPIO pins to understand if there is I2C traffic or if our driver is handling the coming interrupts and so on. Sometimes is not enough to mount the debugfs interfaces and read out the values or cat/grep the /proc/interrupts
Debug GPIO with LED Read More »
Raspberry Pi BT-100 printer program v0.1 (May 2013) Usage: bt100-tlc [options] SIGNAL GPIO -h print help -D turn debug on OUT_LEFT: 17 -B bidirectional print OUT_RIGHT: 27 -t file input text file OUT_PAPER 25 -g file input bitmap file
Raspberry Pi – TESLA BT-100 printer program using GPIO Read More »
The first step in playing with a Raspberry Pi’s GPIO interface is to turn an LED on and off on command, the Hello World of digital electronics. As fun as that is, it would be more fun to do from my mobile phone using my home wireless network, this article runs through the software that
Controlling a Raspberry Pi’s GPIO over the network Read More »
You will need… -Raspberry pi model b+ with raspbian and Python 2(which should come with raspbian) -HDMI monitor and cable -3 tactile push switches -Breadboard(you can get by without it be connecting straight to the buttons, but this also works as a stand for the buttons) -male to female wires (or, in my case, male
Raspberry Pi GPIO game Read More »
After damaging the GPIO port on our raspberry pi while designing a new solar monitoring system we decided that it might be a good idea to build a buffer/level translator to protect the GPIO pins from over voltage and ESD spikes. The board would need to protect all of the data pins we normally use
Raspberry Pi GPIO Protection Read More »
The driver: The driver is actually a modification of the lirc_serial module. I decided to create a new one separately because I couldn’t hack it into the serial nor the gpio driver. The serial driver uses the DCD of the serial port, which is not implemented by the RPi. The gpio driver is created mainly
Raspberry Pi lirc_rpi – (IR Remote control) LIRC GPIO driver Read More »
Introduction Microchip PIC® 8-bit microcontrollers are quite popular amongst hobbyists, and I’ve used them for a long time in several of my projects. They are very cheap, use only 35 assembly instructions that are easy to learn, and most importantly they use flash memory, which gives you the possibility to program the device virtually as
rpp – Raspberry Pi PIC Programmer using GPIO Read More »
There’s something exciting about crossing the boundary between the abstract world of software and the physical ‘real world’, and a relay driven from a GPIO pin seemed like a good example of this. Although a simple project, I still learned some new things about the Raspberry Pi while doing it. There are only four components
Raspberry Pi – Driving a Relay using GPIO Read More »
