4. Linux Application Development

This section focuses on application development based on embedded Linux, the following examples provided by myirtech demonstrate how to take the control of some commonly used peripheral devices through Linux applications. The source code of these examples is located at 04-Linux_Source\Examples of our release package. Please follow the instructions provided in the readme file to set the environment variables, compile the source code and install the binary files into MYD-C437X-PRU development board.

$ cd <WORKDIR>/Examples/

Make sure the following environment variables are right.

$ export ARCH=arm
$ export CROSS_COMPILE=arm-linux-gnueabihf-
$ export PATH=$PATH:<WORKDIR>/ToolChain/gcc-linaro-5.3-2016.02-x86_64_arm-linux-gnueabihf/bin

After building Buildroot, a cross compile toolchain has been created at myir-buildroot/output/host/usr/bin, it can be used here by setting the environment variables instead of the above.

$ export CROSS_COMPILE=arm-linux-myir-gnueabihf-
$ export PATH=$PATH:<WORKDIR>/Filesystem/myir-buildroot/output/host/usr/bin

For building PRU test application, a PRU toolchain should be instaled as show below, it has been provided in our release package at path 03-Tools/ti_cgt_pru_2.1.3_linux_installer_x86.bin.

$ cd <WORKDIR>/ToolChain/
$ ./ti_cgt_pru_2.1.3_linux_installer_x86.bin 
$ export PRU_CGT=<WORKDIR>/ToolChain/ti-cgt-pru_2.1.3/

Customers could build examples all in one step:

$ cd <WORKDIR>/Examples/
$ make

or build the examples respectively:

$ cd <WORKDIR>/Examples/<APP_DIR>
$ make

If the binary files have no permission to run, please assign the running permission to them by chmod：

# chmod +x *