Questions tagged [driver]

Questions about software drivers for external peripherals as well as drivers for the system components. This is NOT for questions about "driver boards", e.g., for motors; use 'dc-motor' instead.

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24 views

Is There Support for 8-bit/4-bit parallel i/o bus (8080 or 6800) for LCD drivers?

I'm looking at using a 240x128 LCD with a UC1608 chip. Are there any packages that support parallel i/o with it? The UC1608 has support industry standard 3-wire, 4-wire serial bus (S9, S8, S8uc) and ...
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57 views

What sort of throughput is achievabe over the USB 3.0 port on the Pi-4?

Looking to run a router application on the rPi-4, and was wondering if anyone has experience using usb 3.0 -> gigabit ethernet adapters on it - specifically what adapter/chipset worked with what ...
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115 views

Raspberry Pi Model 4 - Which nonfree parts remain?

As the Raspberry Pi Model 4 was released today, I reckon it's time to update this question. I'm aware of the fact that a lot of effort was put into writing usable free software GPU drivers as stated ...
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1answer
25 views

How can specify unsigned number corresponding GPIO pin in linux kernel module?

I am beginner of linux driver. I want to write my simple module with led. i found some function like gpio_request(unsigned gpio, const char *label), gpio_export(unsigned gpio, bool ...
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1answer
177 views

LIRC won't setup the device

Very new to this low-level driver stuff, so many places to make mistakes. Basically I'm trying to get an IR transmitter with lirc. I have a IR led to pin 23 with a transistor, however there's nothing ...
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0answers
16 views

Display don't work after driver install

I bought a display via eBay (https://www.ebay.at/itm/3-5-TFT-LCD-Touch-Screen-Module-320-480-RGB-Display-Case-For-Raspberry-Pi/391223449334?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749....
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43 views

Driver installation Edimax EW-7811 UTC

I am trying to install the drivers for Edimax EW-7811UTC on Raspberry Pi3 running Stretch lite. I followed the steps given in How to install EW-7811 AC600 Series and EW-7822UAC adapters on Raspberry ...
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49 views

Display drivers for RaspberryPi3B+

I am trying to get a 3.5 inch RPi Display working on my raspberry pi. I have written my sd card with raspbian and the pi works well (red LCD glows all the time , and greed LCD flickers (fades on and ...
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0answers
60 views

How to get maximum GPIO output speed in Kernel module?

I'm writing a Linux kernel module on RPi2 to push an array to RGB Led matrix, so I want to have maximum speed of GPIO to reduce the 'flick' when it run Bit Angle Modulation. According to this site, ...
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1answer
123 views

Execute script on boot (with boot folder)

I'd like to know, whether there is an option to execute a script on the first boot of Raspberry. There is a catch though. I'd like to be able to put the script in the boot folder. Since it is ...
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182 views

How to set up the Edimax EW-7611ULB combo Bluetooth WIFI dongle

The hidden question in this post... Although, this dongle works (for awhile), there is a problem with the bluetooth driver. After streaming for about an hour, the driver eats up all the Pi memory ...
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79 views

3.5 inch touchscreen driver without internet and Ethernet cable

I recently bought a Raspberry Pi B 3+, I installed Raspbian OS on a SD card and I also bought a 3.5 inch touchscreen. However, the touchscreen display stays white. Here is the screen (sorry for the ...
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35 views

Creating device driver which feeds GPS Co-ordinates from phone to raspberry pi

I don't have GPS module, so I was thinking whether I can feed GPS coordinates from my android/ios phone to raspberry pi over wireless protocol like bluetooth/TCPIP. Can I create a virtual device ...
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54 views

Slideshow program to use with Raspbian and OpenGL?

I have a Pi 3 Model B+ which I wanted to use as a device to show a slideshow for images on a screen. I'm using Raspbian and was happy with FEH, but since another program ("redshift", a blue light ...
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0answers
33 views

Kernel error : [drm] Resetting GPU

I am using an app which is using the vc4-drivers. Sometimes videos freeze for an instant, and I see a kernel message saying : [drm] Resetting GPU After that, some font are no more displayed but the ...
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2answers
227 views

AWUS036AC (rtl8812au) – ›Association request to the driver failed‹ after restarting wpa_supplicant.service

I am using an AWUS036AC wifi dongle to connect to the internet. I installed the drivers following this instructions. When I restart my wpa_supplicant@INTERFACE.service I get this error message: ...
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0answers
39 views

Converting C driver to NodeJS

I am looking for a bit of guidance. I am attempting to convert a Arduino LCD driver to nodejs. LCD:https://www.dfrobot.com/product-1737.html - spec PDF after bottom. I have researched I2C protocol, ...
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0answers
80 views

SONY TV as Display / Monitor

Background: I have successfully used pi-3b+ to display on LG LED TV, New model Sony 4K LED TV. Requesting your support: The year 2011 SONY 40NX710 model is showing blank (No desktop / text-console). ...
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1answer
43 views

DS18B20 device not showing

Things I've tried: Replacing the DS18B20 twice (First one was a different brand than the other 2) Using: modprobe -r -a w1 w1-therm modprobe w1 pullup=1 modprobe w1-therm strong_pullup=1 Checking ...
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1answer
268 views

Can't do anything related to wlan0 (Alpine Linux, Raspberry PI 3 B+)

I just bought a Raspberry PI 3 B+ some weeks ago, and I decided to install Alpine Linux due to it uses OpenRC and one friend of me recommended it to me. I have installed it only as diskless mode, ...
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1answer
30 views

Waveshare 7'' LCD conflicts with WIFI (hostapd)

I have bought a Waveshare 7'' LCD (C) (https://www.waveshare.com/7inch-HDMI-LCD-C.htm) and it seems to work correctly on Raspberry PI 3B+ following the instructions on the site (it doesn't require ...
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1answer
289 views

Error driver marvell 88W8997 File sd8997_uapsta.bin not Found on kernel

We are developing a carrier board for CM3 and we want to have WiFi dual band on CM3. We choose a module with the marvell 88w8997. We connect the module by SDIO for WiFi. I think all is connected OK, ...
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0answers
43 views

Install WiFi Driver for Zero W without WiFi-Connectoin

I have this customized Raspbian Image, which I need to operate a DIY Hardware solution. The Image is configured for a Raspberry Pi 2 B+. I now want to use the Image for a Raspberry Pi Zero W. With ...
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0answers
195 views

Direct memory access to Cypress CYW43455 wireless LAN chip

Where can I find the direct memory addresses or GPIO pinouts for directly controlling the Cypress CYW43455 Wi-Fi chip on the Raspberry Pi Zero W from a custom unikernel, or a modified Raspbian? My ...
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1answer
277 views

Edimax EW-7811un driver: wext or nl80211?

I am trying to use wpa_supplicant. I see in wpa_supplicant --help that there are four options for its driver parameter (-D): drivers: nl80211 = Linux nl80211/cfg80211 wext = Linux wireless ...
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1answer
190 views

Want to install drivers for FLDIGI using rasbian

I have an issue trying to run FLDIGI with My Yaesu FT-991a. Everything I read says i need drivers to make it work but best i can find is this driver [https://www.silabs.com/products/development-...
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1answer
353 views

USB-Serial converter mapped to /dev/ttyUSBx on boot, but not on plug

I have a USB-RS232 converter with an FTDI FT232R chip (VID:PID=0403:6001) that is detected and mapped to /dev/ttyUSBx on boot of the RPi 3B, but does not map to /dev/ttyUSBx if it is simply plugged in ...
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1answer
563 views

Change active wifi network without reboot using external USB wifi dongle

I'm trying to programmatically change which wifi network my PI is connected to, on the fly without a reboot. When I run the script using this USB wifi device it won't switch. However, it works when ...
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1answer
672 views

dmi: Firmware registration failed

I have installed Gentoo kernel 4.14.y from https://github.com/raspberrypi/linux. dmesg shows the following errors ... ... [ 0.182547] dmi: Firmware registration failed. ... ... [ 2.224843] mmc1:...
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162 views

Raspberry Pi 3B rebind driver of onboard wifi

I have a raspberry pi-3 and I am running on raspbian stretch with latest updates till 27/08 (except kernel which is locked 4.14.52) Does anyone know how to unbind and then bind the wifi adapter ...
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0answers
97 views

Kernel module can't be loaded - “invalid module format”

Headline: I've cross-compiled a kernel module for the Raspberry Pi, but on attempting to load it, I get the following error: insmod: ERROR: could not insert module testmod.ko: Invalid module format ...
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1answer
121 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 ...
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2answers
147 views

My Raspberry Pi is crashed and I'm not able to access it with SSH or SFTP. I need to backup my USB Drive mounted with Raspberry Pi

My device is Raspberry Pi 3B with Raspbian stretch lite OS installed. I was followed this tutorial to mount USB drive with my Raspberry Pi. But today my Raspberry Pi crashed for trying to uninstall ...
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1answer
1k views

Raspbian Stretch C920 webcam driver LED control regression?

In a previous Stack Overflow post (April 16th 2018), Raspberry Pi : use VLC to stream webcam : Logitech C920 [H264 Video without transcoding + Audio + LED control], I described how to use the Pi + ...
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1answer
224 views

How and from where is the ENC28J60 driver loaded?

I have a raspberry CM3 setup where I added an external eNet port so that I have internet connectivity. It is very similar to the break-out board setup such as this one which is also based on the ...
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0answers
113 views

Error 41 - Required SSSE3 instruction set not supported by the cpu

I'm trying to connect the ueye camera to a Raspberry Pi 3 B+ over usb. I downloaded the Linux drivers and tried to install it. However, upon installation I got this error: Error 41 - Required ...
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1answer
55 views

Updating Pi 3 B's WiFi driver for security improvements [duplicate]

The recent KRACK vulnerability has made me worried about taking my Pi out with me in public areas. I was wondering if the Raspian/Linux dist would of updated the WiFi driver automatically to protect ...
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3answers
2k views

Building drivers for rtl8811CU/rtl8821CU

I've extracted driver from cd that came with my wireless card and modified it to build on kernel versions up to 4.15. Thanks to similar drivers already patched for new kernels it was an easy task. I'...
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1answer
1k views

Compute Module 3 BCM43364 WiFi via SDIO

I have a Murata 1FX evaluation kit, and I'm attempting to use it to get WiFi working on a Compute Module 3 (with the CMIO board). It uses the Broadcom BCM43364 chipset, which is similar to what the ...
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0answers
242 views

Install Archer T1U driver on Ubuntu Mate

I am trying to install a driver for this wireless dongle but it states that the drivers can be built only on kernel versions 2.6~3.16. While mine is: uname -a Linux pi-raspberry11 4.4.38-v7+ #938 SMP ...
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1answer
796 views

1020x1080 Touchscreen driver

I want to install the LCD-show driver to my raspberry Pi. But the touchscreen I have to use has a 1920 x 1080 resolution. I havent found a way to get the driver for this resolution. Is there somekind ...
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0answers
564 views

How do I speed up MG995 servo motor using PCA9685 motor driver?

I am using PCA9685 to drive a MG995 servo motor. I am using the following code to control the servo motor. import time,Adafruit_PCA9685 def elbow(): pwm = Adafruit_PCA9685.PCA9685() pwm....
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1answer
571 views

Header files not being found (sys/stat.h)

I am trying to compile a device driver to control some LEDs connected via GPIO pins. First, I got errors that /lib/modules/4.14.31-v7+/build was not found, so I ran sudo apt-get install raspberrypi-...
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1answer
543 views

Problems with compiling drivers for rtl8192cu

I'm trying to use realtek 8188cu module in concurrent mode(both station and AP mode simultaneously). I downloaded the driver source files from here: https://github.com/raspberrypi/linux/tree/...
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0answers
327 views

Accessing 3+ SD/MMC /dev/mmcblk devices

I've successfully followed some instructions for access 2 SD cards via SPI on a Raspberry Pi 3: https://ralimtek.com/Raspberry_Pi_Secondary_SD_Card/ How do I configure it to access more than 2 SD ...
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0answers
367 views

Install rtl8192cu WLAN driver on android

I have a RPi2 and have installed Lineage OS 14.1 (Android 7.1.2) However my wifi adapter(0bda:8176 Realtek Semiconductor Corp. RTL8188CUS 802.11n WLAN Adapter) which worked on Raspbian, doesn't seem ...
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0answers
89 views

In simultaneous use of SPI0 and DPI Mode 3 interfaces, can SPI0 CS0 be moved to a pin other than 8?

I am attempting to design a device using a Pi Zero which needs to connect to both an ENC18J60 SPI ethernet controller, and a VGA monitor via Mode 3 DPI and the Mincepi Pi Zero pi2vga schematic. While ...
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1answer
75 views

I just wondering if the peripherals like DMA, PWM and such, are all accessible from user-space

I managed to access GPIO registers according to the datasheet by mmaping the peripherals-base-address provided from "/proc/device-tree/soc/ranges"and made my own user-space library and just wondering ...
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2answers
38 views

SD to USB Adapter: Will the SD card appear as a USB device?

My colleague and I are writing an endurance test for SD cards (running read/write/erase block cycles). We're considering using an Raspberry Pi 3 to run the tests on. The issue is we will be using ...
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0answers
217 views

Why can't my Pimoroni HyperPixel display detect multiple fingers correctly?

I recently bought PIMORONI HyperPixel Display (3.5 Capacitive 800x480 display, driven by internal ADC) The driver is written in Python using the EVDEV lib but there are some problem reading multiple ...