Developments:1. Exposed appropriate sysfs attributes for data length,offset,memory type and data buffer to userspace.2. prussdrv like functions for reading and writing to DRAM0, DRAM1 and SHR-RAM work now, allowing a maximum of 4kB data to be written...
Developments:1. Worked on user library code to allow individual PRU core boot and shutdown.2. Wrote PRU firmware to receive interrupt from ARM and reply to ARM with another interrupt.3. Make all three component work together : user program - driver -...
As part of the cheap home automation project I am currently working on, I needed to get some temperature sensor info to my webserver. For the brain of my project I'll be using a Raspberry Pi. I had ordered a 5pk of DS18B20 temperature sensors so i can...
I'm gonna throw away that Raspberry PI B Rev2 - it gave me weird graphical glitches and didn't start up properly after the first shutdown. Makes me feel bad, but on the other hand I still have the B Rev1 and A Rev2 plus the new Raspi zero.Headless raspberry...
because I asked myself what the price would be in case I use the PIzero and want to create a shield... tada: This is a design for an arduino HAT that can feature an atmega328p as a cheap ADC and even more IOs I don't use. Arduino for real-timey-wimey...
So this board is supposed to be a stamp "USB to testpoint" connector. But as soon as I ordered the thing I noticed it would totally make sense to add a mosfet for controlling power to it and maybe add the run pin and another dedicated pin for remote...
I cut a sheet of plexiglass to use for a backplane. The Pi, hub, breakout, etc were all mounted with standoffs and 4-40 hardware. The backplane was then mounted to the cabinet in the same way. This looks like it'll be a really nice way to keep everything...
Almost there! I just have one small cosmetic detail left I think. I added the shutdown button to the back panel and mounted the big button in a box with long cable and connector. The back cord hole is felt backed for better appearance as well. A couple...
A few photos of putting "the big red button" that starts the photo taking process in a diamond plate case from Hobby Lobby. I used antenna rotor wire for the cable and a 3 pin connector from Amazon. The connector is a little hard to connect/disconnect,...
I added a cap across the photo button terminals to try to prevent the false triggers, not expecting much.... And it didn't work. So, I decided that the solution was in software. I added a sleep in the callback functions tied to the button presses. The...
In addition to the touchscreen, the Patch-A-Tron has 2 LEDs, 9 momentary pushbuttons and a 16 key keypad for I/O. The 16 key keypad allows the user to save and recall configurations. The LEDs provide feedback on the keypad input. 8 of the 9 SPST buttons...
I knew that I was going to need to procure a high current, low voltage power supply for this project. To that end, I went down the row of surplus wall warts at Halted a few days ago and picked what appeared to be a suitable candidate. It was rated 1A...
The latest in an ongoing series of build videos supporting Dr. Beddows enviro-sci students who all have to first build the logger(s) that get used for their final research project. These videos also support the other instructors who have adopted our...
In the original design I wanted to use a custom made optical encoder. I decided to spin my own board for this and figured I might as well integrate regulators and a PWM chip to drive the servos. Below is the board layout. On the side back side in blue...