Embedded C/C++

C/C++ embedded development

Introduction

The Series 150 readers, Series 60 readers and derived systems, support developing custom C/C++ applications.

C/C++ applications that are not constrained by a reduced SDK, they can make use of any library a Linux system may have.

• • The RF operations are backed up by

    • ThingMagic M6e (adrd-m4-150)

    • ThingMagic M6e-M (adrd-m2-150)

    • ThingMagic M6e-Micro (adrd-m2-60)

    • ThingMagic M6e-Nano (adrd-m1-60)

C/C++ development is based on ThingMagic Mercury API SDK.

Target devices for C/C++ embedded applications are the devices and systems listed above.

• • Keonn provides compiled versions of all ThingMagic samples (see Download chapter)

  • Keonn provides a Makefile to compile all sample source code into executables.

Setting up C/C++ devel environment

In order to set up a development environment:

• • Request permission to log into the target device

  • Install required packages (type commands)

sudo apt-get update

sudo apt-get install libreadline-dev build-essential

Downloads

You can find our examples in our GitHub page: https://github.com/Keonn-Technologies/Embedded-C-examples

Building C/C++ samples

Follow the steps

• • Check whether the directory /home/keonn/embedded-c exists. In case it doesn't exist:

    • Checkout our github repository: https://github.com/Keonn-Technologies/Embedded-C-examples

    • Transfer to /home/keonn directory

    • Hint: If your reader has internet access you can check out the git repository directly on the device

  • Check whether the file /home/keonn/lib/libmercuryapi.so.1 exists. In case it doesn't exist

    • Download LIBMERCURYAPI.SO.1 file from the Download files chapter

    • Transfer to /home/keonn/lib directory

    • Rename to /home/keonn/lib/libmercuryapi.so.1

mv LIBMERCURYAPI.SO.1 libmercuryapi.so.1

• • Cd into the /home/keonn/embedded-c directory

cd embedded-c

• • Compile samples

make clean && make

Running embedded C/C++ code

Prevent AdvanNet software from starting by default

AdvanNet is started by default whenever the system boots up. In the command line, type the following:

sudo killall java

In case we want to prevent AdvanNet from starting automatically upon system reboot, execute:

cd /etc/init.d

sudo /usr/sbin/update-rc.d keonn-startup.sh remove

Load the hardware description

This is required to configure the internal pin muxing options.

$ sudo /home/keonn/bin/generate_capes.sh

Enable shutdown line

This is required to enable the RF module shutdown line.

Follow the instructions for your system:

AdvanReader-m2-150.03

$ cd /sys/class/gpio

$ sudo sh -c 'echo 3 > export'

$ cd gpio3

$ sudo sh -c 'echo out > direction'

$ sudo sh -c 'echo 0 > value'

AdvanReader-m4-150.03

$ cd /sys/class/gpio

$ sudo sh -c 'echo 3 > export'

$ cd gpio3

$ sudo sh -c 'echo out > direction'

$ sudo sh -c 'echo 1 > value'

AdvanReader-m1-60 and AdvanReader-m2-60

$ cd /sys/class/gpio

$ sudo sh -c 'echo 68 > export'

$ cd gpio68

$ sudo sh -c 'echo out > direction'

$ sudo sh -c 'echo 0 > value'

Executing C/C++ applications

Build process creates .o object and executable files with the right permissions to be executed.

In order to execute the readasync sample, do the following:

keonn@AdvanXXXX:/home/keonn# cd embedded-c

keonn@AdvanXXXX:/home/keonn/embedded-c#./readasync tmr:///dev/ttyO1 --ant 1,2