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I'm trying create an u-boot image file. But have i have some error.

I am building a custom kernel using Buildroot 2020.02.1 for a PC mounting a AMD GX-222GC SOC.

The default external toolchain is amd-2016.11-19 from CodeBench. Kernel built with that toolchain boots correctly. Instead, if I build the same kernel, same configuration, with the toolchain automatically built by buildroot, the kernel doen not boot! Not even a kernel panic, machine just resets.

It is clear the problem is related to the toolchain.

These are the results of gcc -v

CodeBench:

Before I get started. Yes, I could use leJOS, ev3dev, or some others, but I'd like to do it this way because that is how I learn.

I am using the CodeSourcery arm-2009q1 arm toolchain. I fetched the required libraries (bluetooth) from here: https://github.com/mindboards/ev3sources. I am uploading the programs to the brick by using this tool: https://github.com/c4ev3/ev3duder

I have also fetched the brick's shared libraries, but I can not get them to work properly and there is 0 documentation on how to write a c program for the ev3 using the shared libraries. If I could get that working I might be able to use the c_com module to handle bluetooth, but right now bluez and rfcomm in conjunction with: https://github.com/c4ev3/EV3-API for motor and sensor control seems to be my best bet.

Now, with that out of the way: I'd like to run the EV3 as a bluetooth "server" meaning that I start a program on it and the program opens a socket, binds it, listens for a connection, and then accepts a single connection. I am able to do open a socket, bind it to anything but channel 1 (I believe this might be the crux of my issue), I am able to listen. These all return 0 (OK) and everything is fine.

Then I try to accept a connection. That instantly returns -1 and sets the remote to address 00:00:00:00:00:00.

My code is pretty much the same as can be found here: https://people.csail.mit.edu/albert/bluez-intro/x502.html

Here it is:

I'm creating driver for communication with FPGA under Linux. FPGA is connected via GPMC interface. When I tested read/write from driver context - everithing works perfectly. But the problem is that I need to read some address on interrupt. So I created interrupt handler, registred it and put iomemory reading in it (readw function). But when interrupt is fired - only zero's are readed. I tested every part of driver from the top to the bottom and it seems like the problem is in iomemory access inside ISR. When I replaced io access with constant value - it successfully passed to user-level application.

ARM version: armv7a (Cortex ARM-A8 (DM3730))

Compiler: CodeSourcery 2014.05

Here is some code from driver which represents performed actions:

The Linux already having both gcc & arm-gcc in the environment path:

I am trying to build rt5370 driver for my embedded board. I downloaded "DPO_RT5572_LinuxSTA_2.6.1.3_20121022.tar.bz2". First, I exeuted a make without any modification. So, the size of rt5370sta.ko is 942,330 bytes.

And I added my configurations arm-none-linux-gnueabi-, kernel directory.

In ./Makefile

PLATFORM = ARMV7 ifeq ($(PLATFORM),ARMV7) LINUX_SRC = /home/gykim/working/s1cam/bsp/linux/kernel CROSS_COMPILE = /opt/armv7/codesourcery/bin/arm-none-linux-gnueabi- endif

In ./os/linux/config.mk

ifeq ($(PLATFORM),ARMV7) EXTRA_CFLAGS := $(WFLAGS) -Wall -I$(RT28xx_DIR)/include endif

After make command, the size of rt5370sta.ko is 13,750,585. The file size is too big. How can I reduce the size?

Thanks all.

I compare three compilers:

• GCC (x86) from Debian (6.3.0) produces hugo_x86.so with 7.8K,
• GCC (ppc) from Codesourcery (4.6.0) produces hugo_46.so with 6.6K,
• GCC (x86) from Buildroot 2017.08 (7.2.0) produces hugo.so with 7.5K,
• GCC (ppc) from Buildroot 2017.08 (7.2.0) produces hugo.so with 67K,
• GCC (ppc) from Buildroot 2017.08 (6.4.0) produces hugo.so with 67K and
• GCC (ppc) from Buildroot 2017.08 (4.9.4) produces hugo.so with 67K

The code was taken from eli.thegreenplace.net:

so you might recognize me from the other day when I asked a similar question about running this code in an IDE. Eventually the advice I got was that I should learn to run them together from the command line. As such I took the advice and installed the GNU toolchain from Codesourcery Lite MentorGraphics (not sure if that makes sense). The commands I can do are things like

Code: