Erich Styger posts about working on a lecture module using the Raspberry Pi Pico (RP2040) board, which highlights several aspects of modern software engineering, including DevOps and CI/CD.
Unfortunately, a normal embedded application has no argv[], and many system have no file system. A solution to this problem would be using semihosting with file I/O. Unfortunately for the Raspberry Pi Pico SDK 1.5.1 for the RP2040, there is no semihosting file I/O implemented.
I have now implemented and added file I/O to the SDK, making it possible for the RP2040 to access and use files on the host, among other things. This greatly extends the capabilities of the device, and is very useful for testing, including gathering test coverage information.
Eric’s article shows how the RP2040 SDK 1.5.1 can be enhanced with semihosting file I/O. For this, the low-level standard I/O routines get replaced with semihosting ones, using the McuSemihost library with an example project for the RP2040 Pico board on Github.
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