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Questions tagged [uclinux]

12 questions
13
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1 answer

How to find processes using serial port

I'm using uclinux and I want to find out which processes are using the serial port. The problem is that I have no lsof or fuser. Is there any other way I can get this information?
Kermit the Hermit
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4
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Linux kernel cannot execute any binary (error -12)

Problem: Memory Allocation Problem my platform: SOC = STM32H743 (ARMv7E-M | Cortex-M7) Board = Waveshare CoreH7XXI Linux Kernel = 5.8.10 (stable 2020-09-17) initial defconfig file = stm32_defconfig rootfs = built using busybox | busybox compiled…
Mahyar Shokraeian
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3
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1 answer

Can we run Linux on nucleo-stm32F429zi board?

I understand that the stm32nucleoF429zi doesn't have hardware MMU but we can disable the MMU option from the Linux kernel configuration option. If we do so then why can't we run Linux on stm32 F429zi? Why we can run only uCLinux? How come uCLinux…
tannoy connect
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1 answer

What is being cached?

I have an embedded system with a low amount of memory. The system has allocation issues. Maybe due to fragmentation: Memory allocation issue on NOMMU? The platform is a NOMMU platform and so I suspect that the linux caching is the cause of this…
Illishar
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2
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Minimum ram we can achieve with Linux only blinking led

I heard of uclinux and Linux tiny project are very ambitious projects. It uses concept called XiP to reduce memory footprint. We can strip down binary and storage is less of a problem but connection of dram is complicated so if we want to avoid it.…
Devidas
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1 answer

uCLinux (linux 4.9 nommu) VFS: Cannot open root device "(null)"

I'm stuck with this kernel panic. What I want is to embed an initramfs into the kernel xip Image, but linux panic and tell me to pass a valid "root=" rootfs value. But WHY does Linux look for this input?? (The only reason I don't give any real…
svalsesia
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1 answer

Determing if an embedded Linux system runs uClinux

I have an ARM Linux system running kernel version 2.4, but I'm not sure if the processor has a memory-management unit, so how can I tell whether the system is running a uClinux kernel or a vanilla Linux kernel? The system does not have uname.
Billy
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Add a driver module to embedded linux

I have a task that consists in implementing a driver for an RF module. The RF module communicate with the blackFin609 microcontroller using UART. In a first step i created a uClinux image and download it in the BlackFin609 using uBoot and now i have…
fedi
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Memory allocation issue on NOMMU?

I have a memory allocation issue on an embedded NOMMU linux. Or that is, I might have an issue, I'm not sure. The system has 15M free ram when booted. I have one small app (a Dropbox/REST communication app) that will allocate up to 500k. Once a…
Illishar
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Can I run Linux or even uCLinux on my STM32F407G-DISC1 Discovery board?

This is my first question in this forum. I currently have a STM32F407G-DISC1 board. I wanted to install uCLinux on the board. But then I checked this website https://elinux.org/STM32 which seems to imply that my board can't run uCLinux (as of what I…
Samuel R
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does Barebox bootloader works on cortex m4?

I want to boot uCLinux on the stm32f4 but I don't have enough knowledge about Barebox. is it possible to port Barebox for cortex m4? if yes, how?
Mahyar Shokraeian
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0
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1 answer

Blocking ports with iptables 1.4.2

I am trying to block some ports on an embeded uClinux· The Iptables version is 1.4.2. The command I used was iptables -I INPUT -p tcp --dport 22 -j DROP But it seems that iptables 1.4.2 is not supporting --dport The result of command is iptables:…
Govan
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