gpio

It took me a little while to figure out what was going on, but it seems like the serial port on this HAT I have is having its output fed into U-Boot and causing a loop, preventing FreeBSD from booting with the HAT installed. U-Boot shows a prompt The HAT fills it in with its prompt U-Boot says...

I used to outsource enclosure 3D design of my electronics projects to others. Mainly AVR-based hobbyist gadget/IoT. They guy who was responsible for designing enclosure/box was using some software(s) for designing and sending the final result to the 3D printing, CNC, injection moulding, etc...

I want to use GPIO outputs to drive an IOT Power Strip. https://www.sparkfun.com/products/14236 My question is about triggering scheduled events. For instance I want to issue a GPIO command to turn a pin on and off on a schedule. So I could use cron but would like to avoid system utilities...

I have a GPIO question I have been meaning to ask. So on your typical Arm GPIO board you have maybe 26 GPIO pins but only 8 Grounds. How do you handle 26 LED's with only 8 grounds? Is it OK to co-mingle the grounds? I am making a custom GPIO Lid for the APU1/2/3/4 with a ribbon cable to GPIO...

Hi which gpio cards are compatible with FreeBSD 12 ? I need card to check digital inputs At the moment I'm using the parallel port of my computer but I need a lot of inputs Which cards work without problems?

Hello everyone! I got an Acer XC-704 computer that uses an N3150 CPU. Motherboard made by Acer. It has a ITE IT8772E I/O chip. This has a breakout for two GPIO pins on the motherboard. I'd very very much want to use them to control some relays. I traced them to pin 63/64 of the IT8772E chip. I...

Hello, I have little Raspberry Pi 3 B+ and I installed FreeBSD 12.0-RELEASE on it: # uname -a FreeBSD 12.0-RELEASE r341666 GENERIC arm64 I traed to control GPIO via gpioctl: # dmesg | grep gpio gpio0: <BCM2708/2835 GPIO controller> mem 0x7e200000-0x7e2000b3 irq 22,23 on simplebus0 gpiobus0...

There seem to be drivers for Linux, but support for FreeBSD is missing: https://minnowboard.org/tutorials/connecting-device-sensor-low-speed-expansion-lse-header In particular it would be nice to be able to use this: https://store.netgate.com/Lures/GPS.aspx as a Stratum-1 NTP clock, sort of...

I'm writing a little lib (wrapper) in NodeJS using basic gpioctl commands for the RP. Something like this: ... module.exports.toggle_led = function (pin_number, callback) { let err = new Error(); if (typeof (pin_number) != "number") { err.name = errlist.ERR818.name...

Just wanted to share a little Raspberry Pi project this week with my daughter. It was helpful to show some of the computer basics and have a little fun. Guess the only question here is whether retro gaming can be integrated on it. Any tips or tricks would be appreciated.

Well tonight I was making a script to change GPIO pins on bootup. /etc/rc.d/gpiocfg #!/bin/sh gpioctl -c 0 OUT PP gpioctl -c 1 OUT PP gpioctl -c 2 OUT PP gpioctl -c 3 OUT PP gpioctl -lv I was writing the outline for an rc.d startup script, so I wrote the file premise in the /etc/rc.d directory...

I have found an event library that I would like to use on Arm for GPIO programming. devel/libuv Is anybody using this library? Will it work with events on the GPIO pins?

I am having trouble doing the tutorial for switches and libgpio. http://claydowling.com/2016/09/02/blinking-lights-with-gpio.html Manually, I am using a toggle switch and need to set the input via gpioctl in one line. gpioctl -c 31 IN gpioctl -c 31 PU Does not work, Must be one line like so...

How do I connect the three pins of a PIR to a Raspberry Pi?

Apart from using a breadboard is there any way to connect several wires to a GND pin? I've been looking for some sort of connector, but can't find anything suitable...

I am messing with libgpio and I modified the example below to work with the Beaglebone. http://www.claydowling.com/blog:blinking_lights_with_gpio The difference with the Beaglebone is it uses 4 gpio controllers. Labeled gpioc0-gpioc3. Each has 32 pins assigned. I wanted to use blink.c to run the...

I want to get started on GPIO programming on my RPi and found some tutorials for beginners here There is some sample code in C and Python, and whilst I know I can't use the Python example (not yet anyway...), should I expect to be able to get this to work? #include <wiringPi.h> #include...

I am looking to use PWM on the GPIO pins. FreeBSD 10.x seems to offer sysctl settings for usage. What is the mechanism for usage on FreeBSD 11.x ? I am looking to drive an R/C servo. Here are the BBB 10.4 settings: root@beaglebone:~ # sysctl dev.am335x_pwm dev.am335x_pwm.2.dutyB: 0...

I have the RPi3 running on FreeBSD -CURRENT r327524 with the onewire driver. There are two ways I have found to enable OneWire on RPi3. Simplest is to use the GNU device tree source file and alter one setting. phandle hex address. Here is the GNU DTS...

Hi! I have RPI 3 and FreeBSD 12 installed on it. Unfortunatelly, there is no any dts file on kernel tree and I cannot define one-wire GPIO pin. Is it possible to define one-wire pi without recompilling kernel and dts\dtb files?