Questions tagged [compute-module-3]
For questions pertaining to the Raspberry Pi computer module 3.
57
questions
1
vote
1
answer
272
views
Raspberry Pi Compute Module 3+ and IO Board does not detect any USB devices on Yocto Poky
I have a Raspberry Pi Compute Module 3+ mounted on an IO board running Yocto Poky with linux 5.10.17-v7.
I've installed different usb modules and libraries trying to make CM3 detect connected USB ...
- 111
-1
votes
1
answer
261
views
Access Multiple I2C Ports on Raspberry Pi CM4
I am working on the Raspberry Pi Compute Module 4. I would like to implement the 2 I2C ports for the 2 different types of sensors. (must be accessed within a single application)
I am using the I2C ...
- 57
0
votes
1
answer
301
views
Can we read the emmc flash of the compute module 3+
As we can read the data from the sd card.but in compute module 3 plus there is choice between sd card and emmc. if we flash the raspbian os on the emmc and make changes on it then do we read that ...
- 11
0
votes
0
answers
27
views
CM3+ and RaspiCam V2 issues
I'm trying to use two RaspiCam V2 with CM3+ and Computer Module 3+ Development Kit board.
I followed instructions provided in official links:
Raspberry Pi OS with desktop and recommended software
...
- 112
0
votes
0
answers
165
views
How to clone a Pi that has flash instead of an SD card
I'm working with the Pi CM3+, which has 32GB of flash memory (at least my specific one does). While of course it needed an image on an SD card to initially boot, since then it has been operating ...
- 103
1
vote
1
answer
38
views
How to monitor wifi network connection from raspi to linux PC [closed]
I have several raspberry pi CM 3B+ in a custom device. I use USB dongle as wifi adapter.
After some time passed, the connection became unstable and it often cannot even reconnect and need to be ...
- 131
0
votes
1
answer
247
views
Raspberry pi compute module 4 io board and compute module power on with PoE
I have rpi cmb4 and I want to power on rpi with using PoE. I don't know how should I do. I tried to just connect ethernet cable to rpi but rpi was still closed.
Is there any idea?
- 49
2
votes
1
answer
184
views
What is the impact of setting gpu_mem=16 using the vc4 kms driver? (compute module 3+)
If i understood correctly, the kms driver (vc4-kms-v3d) uses a dynamic memory split which can be set via the 'cma' parameter in cmdline.txt
This means the less memory i assign to the gpu with 'gpu_mem'...
- 71
1
vote
1
answer
340
views
Imager fails to write to CM3 eMMC
I am trying to flash an image onto a Compute Module 3+ with onboard eMMC using the CM I/O board. The process seems straightforward, but I'm running into an error. Here are the steps I'm taking:
...
- 121
0
votes
0
answers
212
views
No sound with Jitsi Meet and ALSA
For a project I'm using a Raspberry Pi with ALSA. ALSA is configured and speaker-test provides me audio output. However, when I open Jitsi Meet in Chromium, there is no sound. When I open YouTube in ...
- 101
1
vote
1
answer
483
views
Opening multiple serial port slows down USB speed
note that this is a duplicate of my question on stackoverflow
I am currently working on a software that use Python3 (pyserial) to interface with a lot of serial port (~24) on a Raspberry Pi Compute ...
- 13
0
votes
1
answer
127
views
Compute module CM3+ change GPIO 37 alt function
I am trying to switch the alt functions on GPIO36 and GPIO37 on CM3+. I installed and ran the pigpiod service. I find that for GPIOs greaters than 27 that pigs command returns "no permission to ...
0
votes
0
answers
388
views
Default i2c not working in compute module
I am trying to communicate with the two i2c devices using the gpio pins 0 and 1 for the first device and 1 and 2 for the second device.
I can communicate to the i2c device using the gpio pins 0 and 1 ...
- 303
0
votes
1
answer
189
views
Gestures not working on FT5336
I'm new to the CM3+ module, but I've worked extensively with other RPi products.
I'm currently trying to implement my own FT5336 driver, but I'm having some slight problems, as the "Gesture" ...
- 101
0
votes
1
answer
601
views
Booting from USB using a CM3+
i would like to use an usb stick to boot from my CM3+, because i would like to test the eMMC with different file systems.
I edited /boot/config.txt adding program_usb_boot_mode=1 but nothing changed. ...
- 31
0
votes
0
answers
277
views
RPi CM3+ SDA0 & SCL0 not working
I'm having slight problems with the CM3+ module...
I've written the dts overlay and got SCL1 and SDA1 working fine.
The pins 28 and 29 should be SDA0 and SCL0 respectively, which is confirmed when I ...
- 101
0
votes
0
answers
47
views
Detection of Compute Module 3+ fails
i am having problems getting the CM3+ to show up on my Windows 10 64 bit OS.
I connected the USB Slave to my Win10 machine and connected POWER IN to another USB Port (of a different machine, so just ...
- 31
1
vote
0
answers
103
views
Selectively disable i2c on Rasbian Buster
I want to disable i2c0 while keeping i2c1 active.
Everything I can find either disables or enables both, but I haven't found a way to only activate one of them.
- 141
1
vote
1
answer
1k
views
Ethernet chip for Raspberry pi Compute Module 3+?
I am designing a base board PCB for CM3+.
According to the datasheet the processor used is BCM2837B0 which is the same as Raspberry pi 3B+
LAN7515 chip is used in raspberry pi 3b+ which is 1000 base ...
- 70
0
votes
1
answer
2k
views
unable to add wwan0 to bridge
I am trying to add the interface wwan0 to a bridge. Currently I am unable to do that.
When I run the command
brctl addif br0 wwan0
can't add wwan0 to bridge br0: Invalid argument
Any ideas why this ...
- 11
1
vote
0
answers
100
views
Raspbarry pi cm3+ lite sd-speed
I managed to get the board booting from sd-card, but I noticed when I use the regular pi 3+ my boot times are much faster, in fact 1,5 times faster. I have tinkered with the config.txt file, trying to ...
- 11
2
votes
0
answers
368
views
Load CPU at a specific % with stress-ng
I'm trying to achieve a 50% CPU load on my Pi to run thermal tests on it since that's what I expect the CPU usage to be with the real application. So far I've been playing around with stress-ng and ...
- 121
2
votes
1
answer
466
views
Raspberry Pi Compute WiFi module via USB
I am designing a board around the RBp Compute and would like to add WiFi connectivity to this device.
However, I do plan on using USB 2.0 for its datarate (e.g. to send and receive images), so the ...
- 21
0
votes
0
answers
360
views
How do I setup the clock form pwm device tree overlay
I am trying to use pwm on GPIO pin 40 but I have been unsuccessful so far.
I am using pwm as device tree overlay in my config.txt
dtoverlay=pwm,pin=40
After that I tried performing the below actions
...
- 11
1
vote
0
answers
223
views
Full KMS causes blank screen on Pi 3 Compute Module
I am currently using a Pi CM3 on a custom PCB.
The board boots fine with a desktop using fake KMS, but when using full KMS, no image is present. Boot image appears but once at desktop there is no ...
- 111
0
votes
0
answers
159
views
Raspberry Pi Compute Module - VBAT SMPS schematic
I'm developing a PCB for a LiON battery powered portable device featuring the Raspberry Pi CM3+ compute module, but am having difficulty verifying my power budget for the system due to the datasheet ...
1
vote
0
answers
78
views
Problem with reflashing the compute module 3
I got the CM3 for it's size and power and I'm pretty new with how it works, so I got the CMIO v1.2 dev board the one without the sd card slot.
I plugged it in, installed the windows driver (I'm ...
- 11
2
votes
0
answers
374
views
SPI0 and UART0 interference caused by SPI interrupt
I have a raspberry CM3 running a custom Linux version created by buildroot (kernel: 4.19.44-v7).
The CM3 is configured to be part of a measurement system that is used on a quad-bike (so a lot of ...
- 55
2
votes
1
answer
2k
views
How do I boot a Compute Module 3+ Lite?
I bought a Raspberry Pi "Compute Module 3+ Development Kit" which includes a Compute Module 3+ Lite (CM3l). Unlike the standard Compute Module 3+ that's included in the kit, this has no on-board eMMC ...
- 1,617
3
votes
0
answers
466
views
Trouble connecting USB devices with Raspberry Pi Compute Module on custom PCB
I am working with a team designing a PCB that works with the Raspberry Pi Compute Module 3 card. We are having a bit of trouble with the USB ports. The schematic of the USB portion is somewhat similar ...
- 31
2
votes
1
answer
1k
views
Enable mini UART on CM3
I wan't to enable the mini UART on a CM3 for Linux console access in emergency cases.
The full UART will be used for other purposes.
With a newly flashed CM3 I can access the Linux console using ...
- 132
4
votes
1
answer
8k
views
How do I Flash (install) Raspbian on Raspberry Pi Compute Module 3 / 3+?
NOTE: This question & solution ONLY relates to Compute Modules 3 or 3+ with on-board eMMC storage. The "Lite" versions of these has NO eMMC Storage
I'm working on a project involving prototyping ...
- 1,617
3
votes
0
answers
330
views
Read/Write LAN9512 EEPROM
We are building a device around the Compute Module 3 and since it needs internet access we decided to go with the LAN9512 that was also used in the Raspberry Pi earlier.
The LAN9512 requires an ...
- 141
0
votes
0
answers
169
views
CM3 Two Camera Previews, one "hangs/freezes"
First time forum poster here, but I hit a wall in debugging this issue. Thank you in advance for any input!
Issue:
I am using two instances of raspistill preview for two hours on two Pi Cameras V2 ...
- 21
3
votes
2
answers
310
views
CM3 both cameras recognized but stereo not working
I recently started to work with the CM3. When I start raspbian, I can check that both cameras are detected and supported. In addition, I can acquire an image/a video from each separately easily but I ...
- 31
0
votes
0
answers
611
views
Create Access Point in Latest Raspbian OS using Edimax EW-7811Un for compute module 3
I am trying to create an access point in compute module 3(and latest Raspbian OS) with the Edimax WiFi dongle. But it did not succeed to create.
Anyone please help me to do that in the latest ...
- 303
1
vote
0
answers
279
views
180 panoramic based on multiple cameras
Need some help please :)
I would need some help to find the best option for a product upgrade. Right now, it consists of a Raspberry Pi 3 B+ with the Camera Module v2 and an external mobile ...
- 11
0
votes
0
answers
270
views
raspberry pi and ltc 2873 cufd (RS 232 and RS 485)
I have a raspberry pi compute module 3 on an I/O board in which gpio 12 is contolling the mode in ltc 2873. If it is ground it will be working in the RS 232 mode. so if I have to write something into ...
- 25
1
vote
0
answers
2k
views
How to login compute module via serial port?
I tried to login to compute module 3 io board from a USB serial port in my PC, but PUTTY just hangs there.
Following procedures have been made:
raspi-config -> interface options -> serial port -> ...
- 197
2
votes
1
answer
4k
views
I2C bus 0 not working, I2C bus 1 is
I am using both the i2c-0 and i2c-1 busses on my raspberry pi compute module 3.
I can use i2c-1 no problem. Full comms, can probe the line and see good signals, get good signals back and the good old ...
- 171
2
votes
0
answers
474
views
64bit distribution on compute module 3
I'm trying to run a 64bit distribution on Raspberry compute module 3.
I've found that Arch linux have a 64 version of his distribution ( https://archlinuxarm.org/platforms/armv8/broadcom/raspberry-pi-...
- 121
1
vote
0
answers
361
views
CM3 - How can I use USB_OTG on carrier board? How does this differ from CMIO board?
Currently trying to figure out how to setup USB_OTG on the CM3 using my carrier board.
I posted on the RPI forums and got an answer which was to connect pin 4 (ID) on a usb micro AB connector ...
- 111
2
votes
1
answer
977
views
Raspberry Pi Compute Module 3 and IO Board does not detect USB device if it's plugged in before booting
I have a Raspberry Pi Compute Module 3 mounted on an IO board, connected to a (powered AFAIK) USB hub full of devices, and running Ubuntu MATE 16.04.2, with the X server disabled. I've noticed that ...
- 123
1
vote
1
answer
3k
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 ...
- 131
3
votes
0
answers
450
views
Mass deployment on Raspberry Compute Module 3.0
I am looking for the easiest method to backup/restore/mass deploy the raspberry compute module. (1000+ pcs)
I though about creating an image with raspbian and opencv but I still need to connect the ...
- 31
0
votes
0
answers
132
views
GPIO listener on Compute module 3 Pi4J
I am doing a project where I use a compute module 3 with Raspbian Jessi Lite, Java with the Pi4J lib version 1.2-SNAPSHOT. I'm trying to implement a GpioPinListenerDigital on the GPIO_23 like so:
...
- 101
1
vote
1
answer
585
views
MongoDB's Date() method returning Unix Epoch instead of actual date
I have a node app running on a Comfile Pi, which is a RPi Compute Module 3 mounted in the back of a touch screen interface.
I'm gathering and storing data using MongoDB, which is running in the ...
2
votes
2
answers
2k
views
How can I enable both the cameras on the Compute Module 3?
I am new to using Raspberry Pi devices. I have a problem with enabling the cameras on the Compute Module 3.
When I run 'vcgencmd get_camera' I get the output 'supported=1, detected=1'.
The ...
0
votes
1
answer
662
views
How to use pin 36/37 as UART0 (ALT2) modifying device tree on CM3?
Those pins are defined in the datasheet.
I investigated in the config.txt but cannot see any option for those. I only see it for pins 32/33 and 40/41. I then tried checking standard softwares as ...
- 176
0
votes
1
answer
1k
views
CM3 does not boot. ACT stays solid green
I've got a CM3 module which is working perfectly, and I received my second CM3 last week and I've been trying to clone the first to the second with no luck.
I start with the first CM3 and ran:
sudo ...
