On the Raspberry Pi, the vmxpi-hal package provides direct access to all VMX-pi capabilities from C++.
Installation on a Raspberry Pi
The VMX-pi HAL can be installed from Kauai Labs Trusted APT Repository.
Library Guide & Reference
As a reference to the HAL API, online help is available.
Installed Files
/usr/local/lib/vmxpi: VMX-pi HAL C++ Library
/usr/local/include/vmxpi: VMX-pi HAL C++ Header Files
Examples
A number of HAL example programs are installed, and can be found at /usr/local/src/vmxpi.
Rationale for inclusion in VMX-RTK: Required libraries for accessing VMX-pi circuit board functionality.