void CodeIso15693AsTag(uint8_t *cmd, size_t len);
int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time);
void CodeIso15693AsTag(uint8_t *cmd, size_t len);
int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time);