Minimal boilerplate in MCUXpresso

[yoursunny]

I received a Rapid IoT Prototyping Kit from Hackster.io. I looked at the Rapid IoT Studio, but its graphic logic does not make sense to me. I prefer to develop with real C code.

I'm having trouble coming up with a minimal boilerplate in MCUXpresso as a starting point. I have already installed MCUXpresso as well as SDKs for the two microcontroller. However:

• I don't see an "atomosphere_app" folder in the MK64F12 SDK, which is mentioned on Getting Started step 4.
• From MCUXpresso IDE - Quickstart Panel, if I use Import project(s) from file system command, the only project showing up is "kboot_k64f". The "hello_world" example does not show up.
• From MCUXpresso IDE - Quickstart Panel, if I use Import SDK example(s) command, "hello_world" example shows up. However, Build command reports error C:\Users\sunny\Documents\NXP\rapid_iot_k64f_hello_world\Debug/../nwk_ip/base/shell/shell_ip.c:3120: undefined reference to `_sprintf'.
• I also tried the "hello_world" with Newlib instead of Redlib. The error becomes: ../nwk_ip/core/interface/sockets.h:253:8: error: redefinition of 'struct timeval'

Can anyone provide a GitHub repository of a minimal working boilerplate for the Rapid IoT Prototyping Kit?

[yoursunny · Accepted solution]

I got an answer on Hackster. It turns out that when I import the SDK example, I must select the following in Advanced Settings:

• Check Redlib: Use floating point version of printf
• Uncheck Redlib: Use character rather than string based printf
• Uncheck Redirect SDK "PRINTF" to C library "printf"
• Uncheck Include semihost HardFault handler

These are described in SLN-RPK-NODE-UG page144.

After making the above changes, I'm able to obtain the file Debug/rapid_iot_k64f_hello_world.axf. This file cannot be uploaded to the kit directly.

I notice that the commands to generate .bin file are commented out. To generate rapid_iot_k64f_hello_world.bin, I need to:

1. In Project Explorer panel, right-click the project, and select Properties
2. In Properties for rapid_iot_k64f_hellow_world dialog, select C/C++ Building - Settings from left navigation.
3. Switch to Build steps tab.
4. Under Post-build steps, click Edit
5. Uncomment (remove #) arm-none-eabi-objcopy and checksum commands.

With these changes, I'm able to obtain a Debug/rapid_iot_k64f_hello_world.bin file that can be successfully uploaded to the kit.

[mrharmonsr]

The online starter guide did not work for me either

In the download package there was an updated starter guide that is better.

For the atmosphere sample app I had to go online with the studio and "export" the app.

Then I copied the exported files into the workspace I had set up and imported the project.

The import did not work for me if the files were NOT in the workspace.

(Same with the SDK's - I had to put them in my workspace!)

After importing the SDKs and the Atmosphere App I was able to build and run the code!

[jjacques]

To save anyone from the confusion I had, correction for above is to Download from the Embedded view within the project to get the source. Exporting doesn't give the source zip.

[estephania_mart]

Hello, 

By any chance, have you checked this post? https://community.nxp.com/thread/489834  I believe this might help you solve your problems while getting used to the MCUXpresso IDE. 

If you still have troubles after using the guide, just let me know here so I can try to help you solve your issues. 

Regards, 

Estephania