Questions tagged [compute-module-3]

For questions pertaining to the Raspberry Pi computer module 3.

38 questions with no upvoted or accepted answers
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Can the Compute Module 3 support 240fps from the Pi Camera v2?

The Compute Module 3 supports CAM1 with 4x Lane CSI MIPI as does the official doc for the Sony IMX219 camera module. It has been explained in many places that the reason the standard Raspberry Pi ...
3
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0answers
239 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 ...
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0answers
222 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 ...
3
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0answers
408 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 ...
2
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0answers
75 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 ...
2
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0answers
146 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 ...
2
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0answers
371 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-...
1
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0answers
50 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 ...
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0answers
50 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 ...
1
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0answers
49 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 ...
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188 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 ...
1
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0answers
746 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 -> ...
1
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0answers
268 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 ...
1
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0answers
682 views

Protecting the on-board flash memory content on Raspberry Pi 3 SOM

I'm using the Raspberry Pi Compute Module 3 (CM3) in my latest hardware product for networking and user interface function, as it has small form factor and solid availability (until 2023 according to ...
1
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0answers
240 views

Connect 2 compute modules with networking

I've recently acquired 4 Raspberry Pi Compute Module 3's. I plan to develop a Circuit board that has built in networking, to allow both compute modules to talk to one another across a local network. ...
0
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0answers
36 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 ...
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17 views

Migrating From RPI 3A+ to CM3+ Lite

I'm migrating from the rpi-3a+ to a cm3+ lite because the product I'm making will be very small and the cm3+ is more for industrial purposes anyway. Ive decided for my case I will make a custom pcb ...
0
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0answers
10 views

external eMMC doesnt get detected

my setup is an IO Board V3.0 with an CM3L. I have an external eMMC + Adapter i connected to the pins 22-27 of my IO Board. Im using the raspbian buster (2020-05-27). To connect the eMMC-adapter to the ...
0
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0answers
35 views

LAN_RUN device tree dt-blob.dts for LAN95XX

I have setup Compute Module 3+ with LAN9512 for ethernet port. The only problem is the ethernet chip needs a pull_up for shutdown I have connected GPIO31 to LAN_RESET in my circuit I am trying to ...
0
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0answers
24 views

eMMC wont boot anymore

i already managed to boot from the eMMC once, so i know it should work. my main goal is/was to boot from USB-Stick using the CM3+ I managed to do this using the CM3L module. Here are the steps i took: ...
0
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0answers
35 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 ...
0
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0answers
40 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" ...
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47 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 ...
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0answers
17 views

Issues in Flashing EMMC in Raspberry Pi Compute Module 3+ with usbboot with Ubuntu 16.04

I am trying to flash EMMC in a Raspberry Pi Compute Module 3+ using Ubuntu 16.04 by following this tutorial. I have done the following in my host system: mkdir ~/RPI_CM3+ cd ~/RPI_CM3+ git clone --...
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23 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 ...
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46 views

What are the alt functions of GPIO FL0 FL1?

I am going through the raspberry pi compute module and deciding which gpio pins to use for status led and LAN_RUN for LAN9512. Seems like GPIO 31 and 33 have the least important alternate functions. ...
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22 views

Help with LAN9512

I am designing compute module using LAN9512 for downstream Ethernet and USB ports Which gpio should I use for RESET? How to configure the device tree for it? Do I need an EEPROM for LAN9512? If ...
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14 views

LAN chip selection help for Compute Module

I am designing CM3+ PCB for a product. CM3+ has same processor. So I am confused whether to use LAN7850 (1000 base) or LAN9512 (100 base). With this compute module board I will be using 100 base ...
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26 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.
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23 views

Need help with Compute Module 3 PCB development

I am designing a Compute Module 3 based PCB online on : Gumstix I can download the CAD files and it automatically generates the device tree so it seemed convenient. I created a custom design and ...
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0answers
150 views

Why is i2c-bcm2835 trying to use GPIO pin 2

I am trying to understand, why is i2c-bcm2835 trying to use GPIO pin 2. As shown below. [ 4.256474] gpio-28 (ffffffff.i2c): enforced open drain please flag it properly in DT/ACPI DSDT/board file [ ...
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99 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 ...
0
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0answers
82 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 ...
0
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0answers
24 views

CM3 - Moving system files into USB memory

I have a CM3 with 4GB eMMC, which is small and while CM3 cannot boot from an SD card, I was thinking of : 1 - Keeping the /boot files inside the eMMc. 2 - Having the rest of OS files (root directory)...
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0answers
106 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 ...
0
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0answers
396 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 ...
0
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0answers
134 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 ...
0
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0answers
116 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: ...