long meiFlashMemorySet(MEIFlash flash,
                       void     *dst,
                       void     *src,
                       long     count)

FlashMemorySet copies application memory (starting at address src) to count bytes of flash memory (flash, starting at address dst).

You should calculate the dst pointer by considering flash memory as a stream of bytes, because FlashMemoryGet will adjust the pointer for the actual type of flash memory.

flash memory is of type unsigned long *.