Summary Write your own application and include the application into the final image to be downloaded into the S3C2440 board, and you can debug the application by using GDB.
How to copy out the memory data from Keil when debugging, in command window, you can use Display command fetch the memory data, example: d 0x2000293C,0x20002984 0x2000293C C8 CC 9D 5F F2 EB FA D7 - AE 26 5F 5F BA 41 7D D3 ..._.....&__.A}.
Summary After earned the RHCA certificate, you will received a congratulation email, a RHCA credential link.
Install Xmanager and work with Xshell will make your work more convenient, as it will pop out the remote Linux program with the GUI interface at your local Windows through SSH tunneling.
Summary Test on Samsung ARTIK 530 connect ARTIK Cloud by using Node-RED, use ARTIK 530 Switch to control the ARTIK 530 LED lighting, go through the cloud (ARTIK 530 switch --> ARTIK Cloud Switch --> ARTIK Cloud Rule engine --> ARTIK530 LED Light), with successful result.
Summary Test on ARTIK 530 connecting to ARTIK Cloud, using ARTIK 530 Switch to control the LED through ARTIK cloud, with successful result.
Summary Tested ARTIK 530 on the GPIO function, implemented the switch to control the LED light on and light off, with successful result.