To support different product and use case requirements, some portions of the RF driver reside in the file mml_nfc_pcd_port.c. This file is released as source, while most of the RF driver is binary only. These functions allow system integrators to decide how each function is best implemented for their system. Applications using a real-time operating system (RTOS) have dedicated routines for critical section entry and exit, along with task yielding functionality that can be employed during calls to sleep. Refer to the API documentation on porting for more details. Review the example implementations of the porting file available in the DTE (single-threaded) and the FreeRTOS demo.
EMV level 1 certification requires a library checksum as part of the DTE and certification paperwork. Details are not included for how this checksum is generated. In the DTE example, the files of the RF driver, PBM library, and EMV L1 stack are combined into a binary blob using the cat command, then a sha1sum is generated for this blob. The resulting hash is included in the DTE example code and user guide. Note that this hash/checksum will change with every build of the example as timestamps, etc. are included in the binary files. Refer to the Contactless Library Memory Usage section in the Doxygen documentation accompanying each release for details.
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