| CARVIEW |
Select Language
HTTP/2 200
date: Sun, 17 Aug 2025 10:52:56 GMT
content-type: text/html; charset=utf-8
content-encoding: gzip
cf-ray: 97089feedb638839-BLR
cf-cache-status: DYNAMIC
cache-control: private
set-cookie: prov=db0efe91-9306-4a20-a1db-74a98bf09c11; expires=Mon, 17 Aug 2026 10:52:55 GMT; domain=.stackexchange.com; path=/; secure; httponly
set-cookie: prov=db0efe91-9306-4a20-a1db-74a98bf09c11; Path=/; HttpOnly; Domain=stackexchange.com
set-cookie: __cf_bm=ftILDjuvQr8oerJvD7pms2QCN8cBkVTuvc3U12xemLM-1755427976-1.0.1.1-xAL5MmCzMiwENDSY6y__cGTKL1aNIWyHb1P2WVf0cQQLwGw2PEr4cVbP2NMp.CLOAEQYhD4h8uWorBJN4c27KkKyJzqKElZ9Wy8.Ezjen8c; path=/; expires=Sun, 17-Aug-25 11:22:56 GMT; domain=.stackexchange.com; HttpOnly; Secure; SameSite=None
set-cookie: _cfuvid=Cek4nJHrjF0SmUzmB3dcivKM3T72rUNeqOasSmSigT8-1755427976061-0.0.1.1-604800000; path=/; domain=.stackexchange.com; HttpOnly; Secure; SameSite=None
strict-transport-security: max-age=31536000; includeSubDomains
vary: Accept-Encoding
content-security-policy: upgrade-insecure-requests; frame-ancestors 'self' https://stackexchange.com
x-clacks-overhead: GNU Terry Pratchett
x-frame-options: SAMEORIGIN
x-request-guid: b06bc22f-e27e-401a-b919-7a3e1e8f9c15
x-worker-origin-response-time: 545000000
x-dns-prefetch-control: off
server: cloudflare
Newest 'spi' Questions - Raspberry Pi Stack Exchange
Skip to main content
Stack Exchange Network
Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Visit Stack Exchange
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
Learn more about TeamsQuestions 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.
496 questions
- Bountied 0
- Unanswered
- Frequent
- Score
- Trending
- Week
- Month
- Unanswered (my tags)
0
votes
0
answers
19
views
Quad SPI setting CM4S(lite) for SD card connections
I m working with a CM4s on a custom board with a connection to the quad spi connection on pins 10,12,16,18,22,24 as per page 16 of the data sheet. We are having problems with the SD card connection ...
0
votes
0
answers
26
views
What is the DMA frame end (as referred in the official manual)
The official data sheet contains a remark that the TA bit in SPI_CS register is automatically reset on "dma_frame_end impulse" (see p 138 Table 160 SPI_CS register).
However there is no ...
0
votes
0
answers
40
views
How to use a Pimoroni 1.3" SPI Colour Square LCD with pico & MicroPython?
I want to use the 1.3" SPI Colour Square LCD (240x240) with a pico and micropython. According to the website that is possible. However, when looking at the github page of examples there is ...
0
votes
2
answers
54
views
0
votes
1
answer
81
views
3
votes
0
answers
58
views
Pi5 dtoverlay=spi0-2cs creates SPI objects, dtoverlay=spi5-1cs does not
Using Linux rasp5Dev 6.12.20+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.12.20-1+rpt1~bpo12+1 (2025-03-19) aarch64 GNU/Linux.
Attempting dtoverlay=spi?-1cs, substituting the values 1 through 6. All fail to ...
1
vote
1
answer
126
views
1
vote
1
answer
504
views
Raspberry Pi 5 SPI Problems
I currently have a custom hat with ADCs that communicate via SPI. I am using a Raspberry Pi 4 with a C program to perform measurements at a frequency of 50 kHz, and everything is working well. However,...
3
votes
0
answers
97
views
Why irq/186-spi0.0 takes 25% of CPU time (a RS485 hat)
I have a number of Rpi 5.0. I used to use SPI0.0 there using one of these CAN/RS485 hats like this (there is the hat's pinout on that page). It worked without problem. Yet, there was that irq/186-spi0....
0
votes
0
answers
44
views
0
votes
0
answers
276
views
Qualcomm QCA7000 over SPI on Raspberry Pi 4b
I'm attempting to connect a RED BEET Qualcomm QCA7000 board over SPI to a Raspberry Pi 4B. I've added the dtoverlay=qca7000 to the config.txt and wired up the board with the Pi GPIO pins according to ...
2
votes
0
answers
172
views
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 ...
0
votes
1
answer
105
views
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-...
-1
votes
1
answer
116
views
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 ...
0
votes
0
answers
22
views
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) {
...
- The Overflow Blog
-
- Featured on Meta
-
Hot Network Questions
- Can a Pythagorean Triple have rational acute angles?
- A football pool gone awry
- How to upgrade Debian Bookworm OpenSSH package(s) to be able to upgrade to Trixie via SSH without the risk of interruption?
- Pattern of the Chessy Sequence
- Is it always inappropriate to use a relative to submit a reference letter in support of a grant application?
- Does the sequence of iterated unions in the recursive definition of transitive closure eventually stabilize?
- A kind of “Merchant Prince” (not in Asimov’s Foundation series) starts and ends a war between tribes of herders on a newly discovered planet
- Ph.D. supervision when advisor moves
- What is best way to remove paint&primer from ceiling?
- Is there an objective record of the Israel Hamas peace talks?
- How to properly say "bald"?
- Does the electric field of a constant-current body of charge fulfil Coulomb's Law?
- Which pairs of mutually contradicting conjectures are there?
- Citing ChatGPT for code generation
- Why test in large lunar surface facilities with lunar regolith simulant instead of small ones?
- How and where to place consecutive intercalary days in a lunisolar calendar with strictly lunar months, but an Earthlike solar year?
- Is it possible to protect a bash script against a hostile environment?
- Is the attack from Spiritual Weapon reactivation a Bonus Action or a free action?
- Can Spiritual Weapon exceed its nominal casting range?
- Popping mustard seeds for a curry dish
- Statistical type of topology
- Recommendation letter from mathematician for CS masters?
- Basic questions about hard spheres model and reference frames
- How to work with headstrong colleagues