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Questions tagged [peripherals]

Peripherals are devices connected to the Raspberry Pi, but external from it.

15 questions with no upvoted or accepted answers
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217 views

Adafruit Retrogame library will not send character press events

I'm trying to build a small arcade cabinet powered by the Raspberry Pi 2. I've got several arcade buttons (for ABXY, Insert Coin/Select and Start) and an 8-way joystick. I'm following the tutorial ...
2
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0answers
50 views

How get old Apple bluetooth keyboard and mouse recognised

I have an old Apple Bluetooth keyboard and mouse from about 12 years ago. They can still connect to my newer Mac laptop, but the Pi 3 bluetooth adaptor cannot see them at all. According to Apple's ...
2
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0answers
3k views

How to setup resistive LCD touchscreen over SPI

I've been following a guide for setting up an LCD touchscreen, without success. When the screen is plugged into the GPIO pins it just shows a white screen. After all my attempts it remains white. ...
2
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0answers
336 views

Difference between LCD Displays

I was using a Hitachi HD44780 display hooked up to GPIO pins. Sadly, it got damaged and, in a rush, I had to get a different one. It is a ADM1602U serial enabled display. However I don't plan to use ...
1
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1answer
147 views

Single channel SPI DMA

The documentation on the SPI peripheral says: Two DMA channels are required, one to read from and one to write to the SPI. Is this necessarily true? I have a device where I need to write a few ...
1
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0answers
176 views

SUID executable doesn't work for `/dev/mem` access

Here is explained how to gain access to the peripheral without being root. I've just tried in my environment (Raspbian Stretch, RPi2, Qt5.9) in this way: int main(int argc, char *argv[]) { ...
1
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0answers
263 views

Problem installing Bluetooth Dongle on Raspberry Pi 2 running Windows 10 IOT Core

I recently got an Orico BTA-403 (officially supported) bluetooth dongle and inserted it into my Raspberry Pi 2, Model B running the most recent version of Windows 10 IOT core. I rebooted, and then... ...
1
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0answers
104 views

How to use Pi to remote control a cell phone in another country

I work in the US and help develop a mobile that is used in lots of countries, especially emerging market countries. I often need to test the behavior the app in those countries. Currently the only ...
1
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0answers
69 views

My USB2VGA is working - How do I configure X to use that screen?

I have a green screen on my USB2VGA connection (DisplayLink). How do I configure X to use the screen /dev/fb1 which exists? I do not find an xorg.conf.
1
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0answers
574 views

send_packet: Network is unreachable Huawei E3351 3G Dongle

I have a Huawei E3351 3G dongle connected to a Pi which requires maximum unattended uptime. Ensuring that the connection remains solid over time has been a troublesome endeavour, largely due to ...
1
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0answers
310 views

Precision ADCs for Raspberry Pi to minimize Gibbs phenomenon?

I would like to generate stable volts from 0 to 5 and to minimize Gibbs phenomenon without losing measurement data. I get much sudden peaks in Raspberry Pi 1/2 which I can control by adding low-pass ...
0
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0answers
24 views

Simple wireless camera with API recommendations

I have a whiteboard and want to build a setup where I can press a button and have a picture of the whiteboard delivered to google drive. I have a raspberry pi that acts as a little toy server for ...
0
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0answers
393 views

Dalsa Genie GigE vision camera for Raspberry Pi

I am setting up a camera with my Raspberry Pi to test an optical layout on a high altitude balloon mission. I am using a Raspberry Pi model B. The camera will be required to take a still photo every ...
0
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2answers
171 views

How to interface to a Pi without knowing its IP or having a large HDMI monitor?

I wish to access a RPi's shell, but I do not wish to lug around some big display and ideally 120 volt power wouldn't be required. A Linux or Windows laptop are acceptable or maybe some other typical ...
0
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1answer
227 views

How to use the DMA-DREQ/PANIC threshold of the hardware-PWM

I'm using the hardware PWM that is described on page 138 of the BCM2835-ARM-Peripherals document. The description of the DMAC-register (page 145) indicates that one can set the FIFO-threshold at ...