Questions tagged [spi]
The SPI bus, Serial Peripheral Interface, is a synchronous serial communication interface for short distance communication, e.g. between components in an embedded system such as the Pi. Devices communicate in full duplex mode using a master-slave architecture with a single master. The master device (typically the Pi) initates all communications.
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Changing SPI mode from multi to single on Raspberry Pi 5
I'm trying to connect my Raspberry Pi 5 to Arduino via SPI inteface.
As a reference, I've used connection scheme and code from this manual on penguintutor and it worked like a charm.
But in my project ...
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No SPI0 MISO pin on Raspberry PI 3B +
I had to reinstall my Raspberry Pi, now with Raspberry Pi OS bookworm, keeping the hardware. I am using a MCP3008 ADC converter with the new Adafruit libraries as https://learn.adafruit.com/raspberry-...
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My ST7735 TFT Display is showing stuff cursed
I am trying to display text on my display but it shows stuff very weirdly, it's hardly readable. I am using the Raspberry Pi Zero 2 W with the Raspberry Pi Os Lite 64 bit.
I have SPI activated.
This ...
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Acceleration and Gyroscope read 0 on the ICM 20468
I'm trying to read from the ICM 20948 using a Pico W, however, whenever I read from the acceleration and gyroscope addresses I get 0. What could be the problem?
imu.c
void init_imu(IMU* imu) {
...
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How can I display small black and white images on a e-paper spi display with a Raspberry Pi Pico W?
I have purchases a Raspberry Pi Pico W and have wired it to the Waveshare 1.54 inch e-Paper display module V2 I have used the code available at the github page, specifically the epd1in54b.py and the ...
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Raspberry Pi 3B shows a screen with an underscore in the corner
I am using a raspberry pi 3B v1.2 with a 3.5 inch kuman display as shown here. I have installed the lcd-show drivers by doing this:
sudo rm -rf LCD-show
git clone https://github.com/goodtft/LCD-show....
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Cannot determine pins to use when connecting 3 SPI devices to Pi 5
I am trying to connect 3 SPI devices to my pi 5, they are all RFID-RC522 modules and so they all have the same device id, so I put them on separate busses.
I researched and selected these three ...
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#include files for https://www.kernel.org/doc/html/v4.14/driver-api/spi.html Pi5 C/C++ development
Referring to https://www.kernel.org/doc/html/v4.14/driver-api/spi.html
Writing code to use the SPI API's on a Pi5(RP1). The spec shows the basic Structs for each SPI API. Those structs contain ...
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RPI 4 with LS7366R encoder counter chip with incremental photoelectric rotary encoder
I have raspberry Pi 4 and it is connected to LS7366R, but I am not using the CS0 or cs1, am using any GPIO and controlling it (high/low) manually.
the encoder has A and B signals, and they are ...
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Get display working on SPI1
I'm trying to get a waveshare 4.2inch E-Ink Display Module Compatible with Raspberry Pi 4B/3B+/3B/2B/B+/A+/Zero/Zero W/WH/Zero 2W Series Boards 400x300 Resolution SPI Interface working on a Raspberry ...
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Change which pin is used for SPI SCLK
I'm trying to get a waveshare 4.2inch E-Ink Display Module Compatible with Raspberry Pi 4B/3B+/3B/2B/B+/A+/Zero/Zero W/WH/Zero 2W Series Boards 400x300 Resolution SPI Interface working on a Raspberry ...
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How soon can I use SPI to communicate with a peripheral after boot?
So, I'm building a device involving a raspberry pi (Pi4) and an e-ink display, with SPI communication. I'm wondering what the soonest would be, I could communicate with the display. Main idea here is, ...
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SPI with Bookworm OS - Change SPI Clock Speed [duplicate]
Is it possible to adjust the Clock speed of the SPI device from the terminal/CLI?
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Using SPI and GPIO in Pi OS Bookworm on Pi 3b v1.2
How can I control GPIO from the CLI when I have SPI enabled?
I need to add a reset signal to an application that issues the reset via a shell script, prior to launching the application. The ...
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Delay between writes of two spi.xfer for sending data to DAC
I am using Raspberry pi 3 for sending data through a DAC through SPI communication. Right now I am using AD5686 which is connected to the raspberry pi using SPI communication SPI0 (SCLK to CLK of DAC, ...
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Digital potentiometer X9C104P with a Raspberry Pi 5
I've tried using a Raspberry Pi 5 to control a digital potentiometer X9C104P. I followed this wiring diagram:
Potentiometer (POT) - Raspberry Pi
INC: GPIO20
UD: GPIO21
Vh: 5V
Vss: GND
Vcc: 5V
CS: ...
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Reading from MT6816 magnetic encoder with SPI connection using Python on Raspberry Pi 4
I am totally new to the field, don't really know what I'm doing and in need of help. I'm trying to read an absolute angle using an MT6816 14-bit magnetic encoder via SPI connection using Python on ...
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Problem when testing module DAC MCP4922 with Raspberry Pi
I'm encountering an issue while testing a custom-designed DAC module that utilizes an MCP4922 chip as its primary processor.
The vendor provided C language test code for ESP32-S3, but I intend to test ...
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Implementing Precise Timing between values with Raspberry Pi and 16-bit DAC using py-spidev
I want to send values from an RPi to a DAC in order to generate an analog signal. The DAC is 16 bits, and I'm using the py-spidev library. Let's say I have a pre-prepared list of 1000 16-bit values ...
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Raspberry Pi SPI2 Interface Not Working with MCP251xFD CAN Interfaces
I am working on a project involving a Raspberry Pi (RPi) where I need to access three CAN interfaces via three MCP251xFD chips. I have set up these interfaces using the RPi's SPIs (SPI0, SPI1, and ...
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Which Cable Should I Use to Send Serial Data From my PCB to a Raspberry Pi via USB?
My PCB has a 16-pin male connector with a 2.54mm pitch. I was going to connect this to my Raspberry Pi via its GPIO, but I have a PiSound sitting on it now, so my only other option is to connect to it ...
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Attaching an interrupt on SPI MISO pin
I am reading an ADC that signals when the data conversion is complete by setting the SPI MISO pin low. I would like to set an interrupt on that pin, but using the GPIO library to do so isn't working. ...
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How can I use my Raspberry Pi as a CH341A Programmer(BIOS writer)?
I am trying to flash a custom BIOS to my motherboard. The motherboard's built-in software won't let me flash it because it's modded. I was told to get a CH341A Programmer to flash the modded BIOS ...
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Chip Enable CE0 or CE01 not working with spidev
I have enabled SPI via raspi-config and I can see /dev/spidev0.0 and /dev/spidev0.1. I can successfully execute the spidev_test.c (https://github.com/torvalds/linux/blob/master/tools/spi/spidev_test.c)...
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RPi4 - pigs bscx SPI slave not working
I have an ESP32 set to an SPI Master with 100kHz, Mode 2 and just want to send 0x19 to the RPi4 as a slave running pigpiod and using shell for output.
When I use piscope, everything seems fine for me ...
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Using SPI0 on Raspberry Pi for 3 to 4 slaves
I've been having troubles to use several readings using SPI on a raspberry pi 3B and I would like to get any solution, all my code is in python since everything then goes to a GUI
So I have three ...
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How to run SPI1 and SPI0 at the same time?
I am currently attempting to send and receive data from SPI0 to SPI1 on a singular raspberry pi.
My Current code is as follows;
from multiprocessing import Process
import spidev
import time
import sys
...
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Waveshare ePaper display via IT8951 hat driver for Raspberry pi 4 model B
I bought the 10.3 epaper display which I am trying drive it from a Raspberry Pi 4. The official wiki instructions (https://www.waveshare.com/wiki/10.3inch_e-Paper_HAT) is using BCM2835 which I assume ...
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Play Video on an LCD connected through SPI
How can I play a video on an lcd connected through SPI? I want to find a video player, a tool, a library, but all that I have found so far is designed for HDMI display. My actual solution is based on ...
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SPI sending and receiving data
I hope you can help.
I am currently using a raspberry pi 4b and want to be able to use the SPI capabilities. For my pi I have SPI0 and SPI1. The pins used are as follows;
SPI0_MOSI - pin 19 (BCM_10)
...
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Connecting Two SPI LCD to raspberry pi GPIO pins
I am doing my NEA project right now and I have a problem using 2 TFT LCD. Here are more details about the LCD 2.8" LCD SPI, Driver: ili9341 with touch version 1.2, this a picture of it:
I have ...
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Failed to add edge detection - Raspberry Pi 4 GPIO
I am trying to run a LoRa receiver using python
from time import sleep
from SX127x.LoRa import *
from SX127x.board_config import BOARD
BOARD.setup()
class LoRaRcvCont(LoRa):
def __init__(self, ...
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Why My Spi Connection Is Not Getting started?
Hello Guys I Am New To Embedded & Rasberry PI. So In Order To Understand SPI Connection I Made An PI-PI SPI Setup PS. I am Using Two Rasbrry Pi Model 4 B with Raspi OS & i did the followings ...
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Need Help with nRF905 Transceiver Module on Raspberry Pi Zero
I recently bought a nRF905 Transceiver Module from Jaycar and am wondering how to use it. It is meant for an Arduino and I have found some libraries for it (nRF905 Library For Arduino - GitHub)
I need ...
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Raw wiring to a ILI9341 TFT display
I'm trying to connect a RPi Zero W to a Winstar WF24LTYAJDNN0 LCD module with integrated ILI3941 controller.
The LCD comes with the typical 40 pin flat cable with the following pinout:
The LCD is ...
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Extending the SPI buffer size beyond 65536 bytes
I am trying to use the Raspberry Pi 4 model B to program the Lattice ICE40 FPGA chip via SPI. It requires continuous clock signal throughout the whole transmission of the bitfile, which is easily ...
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TFT HSD - 9190J-D1 connection to Raspberry Pi model B
I have Raspberry Pi 4 Model B
I want to connect SPI TFT 4" LCD HSD-9190J-D1 using GPIO pins.
Kindly help me up with proper connections and necessary drivers required for the LCD to work as ...
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Use different clock for SPI receive and send data on RPI4B
Has anyone here ever used two different clocks to synchronize sent and received data via SPI ? By that I mean, using a PIN clock1 for transmission and a PIN clock2 for reception.
I don't know if it is ...
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Outputting to SH1106 display with PIL only works from loaded files [closed]
I'm dealing with a maddening bug when trying to use an OLED module (sh1106 clone, interfaced over SPI) with a raspberry pi. I have stolen the following function from https://github.com/8TN/Raspberry-...
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SPI clock is not switching on RPi
I need to use SPI for a project I'm working on with a Raspberry PI, but the little bit of test code I wrote doesn't seem to work.
#test program for spi
import spidev
import RPi.GPIO as GPIO
from time ...
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SPI loaded but MOSI as input
I wrote a script to display data on a led matrix, controlled by a few GPIO for line selection and SPI to feed data for this line. This was working perfectly 2 days ago, I let the script display random ...
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Cannot get WS28xx strip code working in eclipse swing
Hey all I have been looking at doing this for some time now. I ran across this posting and this is the type of led strip I am using. However, using that code seems to have errors when trying to add it ...
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Using MAX7219 Dot Matrix module with Luma.Led on different GPIOs
I have a MAX7219 dot matrix module (this one) that I'm trying to run on my Raspberry Pi 4 with the Luma.LED library. Its documentation suggests the following GPIOs/pins be used:
Board Pin
Name
...
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SPI Clock Phase on CM4 spidev1.0
I have a CM4 Compute Module and am trying to set the clock phase on the second SPI channel. But the ioctl() to set mode returns an error whenever I attempt to set this phase bit:
int fd = open("/...
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Uninterrupted, endless SPI transfer - is it possible?
I wrote a linux driver for SPI protocol so RaspberryPi could communicate with my device that's using serial data transfer (the device has clock input and data output). It almost works, the problem is ...
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spi overlay driver don't run due to shared pin11
I'm trying to run old FLIR Lepton driver on Raspberry Pi 3 Model B v1.2 (2015).
FLIR SW driver here: https://www.flir.eu/developer/lepton-integration/lepton-integration-raspberry-pi/.
PDF guide here: ...
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Assistance with pigpio SPI slave bscXfer on Raspberry Pi 4
I am trying to write C code so my Raspberry Pi4 can be an SPI slave, and the SPI master can read data from the Pi4.
I'm expecting to get this data from SPI master (in a continuous loop):
0x01 0x42 ...
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2-ch-can-hat (mcp2515) on SPI1 rpi 3 b+
On a
Raspberry Pi 1 Mod. B+
Raspberry Pi reference 2021-01-11
Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 21090519d85bdaa1615d5d5057d37b09368ea5d2, stage2
Oct 29 2021 10:49:08
...
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SPI Chip Select (CS) Control?
I am working with spidev on my RPi4 project and I have noticed that there is a significant delay caused by the CS signal. I am using the hardware CS pin (CE0, pin header 24) to drive the CS signal for ...
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Multiple SPI reads on Pi Pico requires reinitialisation
I'm playing around with reading in analogue inputs from an MCP3208 ADC via SPI.
However, reading multiple inputs seems to cause a seg fault unless I reinitialise the SPI on each read/write.
I've ...
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