ARM development - building an embedded development environment

Download ckermit serial port tool

sudo apt-get install ckermit

If we have a new serial port connected, we can view the connection data by viewing /dev

Configuration of ckermit configuration file .kermrc

set line /dev/ttyUSB0    

set speed 115200    

set carrier-watch off    

set handshake none    

set flow-control none    

robust    

set file type bin    

set file name lit    

set rec pack 1000    

set send pack 1000    

set window 5    

sudo kermrc to enter the serial port and modify the external device and the host to be in the same network segment

ifconfig eth0 172.16.3.100

Installation and configuration of cross-compilation environment

A cross-compilation tool arm-linux-gcc-4.5.1 is needed here

After unzipping it, a folder will appear with a default path.

/opt/FriendlyARM/toolchain/4.5.1/bin

We can see that it has many functions and can realize many functions

At the same time, we need to be compatible with our platform. We are a 64-bit platform, and we need to be compatible with 32-bit platforms

sudo apt-get install lib32z

At this time we need to use this program in different places, so we need to configure the environment variables, which have two places.

One is in /etc/profile. If you modify it here, all users will be modified.

So we choose to modify the ./bashrc file in the home directory. The modification here is only useful for the current user. We add

export PATH=/opt/FriendlyARM/toolschain/4.5.1/bin:$PATH

Communication between host and ARM board

First we install the nfs communication server

sudo apt-get install nfs-kernel-server

Create a folder and specify a specific directory

vi /etc/exports

/home/user/share *(rw,sync,no_root_squash)//* is the IP address, rw read-write, sync synchronization, no_root does not do root verification

/home/user/rootfs *(rw,sync,no_root_squash)

service nfs-kernel-server restart //Server restart

sudo mount -t nfs 172.16.3.100:/home/user/share /mnt -o nolock //Mount the Linux system on the arm board

In this way, the operation of the arm board is realized through the network server