#define DELAY_ISO15693_VCD_TO_VICC_READER 1056 // 1056/3,39MHz = 311.5us from end of command EOF to start of tag response
#define DELAY_ISO15693_VICC_TO_VCD_READER 1024 // 1024/3.39MHz = 302.1us between end of tag response and next reader command
-void Iso15693InitReader();
-void CodeIso15693AsReader(uint8_t *cmd, int n);
-void CodeIso15693AsTag(uint8_t *cmd, size_t len);
-void TransmitTo15693Reader(const uint8_t *cmd, size_t len, uint32_t *start_time, uint32_t slot_time, bool slow);
-int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time);
-void TransmitTo15693Tag(const uint8_t *cmd, int len, uint32_t *start_time);
-int GetIso15693AnswerFromTag(uint8_t* response, uint16_t max_len, uint16_t timeout, uint32_t *eof_time);
-void SnoopIso15693(uint8_t jam_search_len, uint8_t *jam_search_string);
-void AcquireRawAdcSamplesIso15693(void);
-void ReaderIso15693(uint32_t parameter);
-void SimTagIso15693(uint32_t parameter, uint8_t *uid);
-void BruteforceIso15693Afi(uint32_t speed);
-void DirectTag15693Command(uint32_t datalen, uint32_t speed, uint32_t recv, uint8_t data[]);
-void SetTag15693Uid(uint8_t *uid);
-void SetDebugIso15693(uint32_t flag);
-bool LogTrace_ISO15693(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_start, uint32_t timestamp_end, uint8_t *parity, bool readerToTag);
+extern void Iso15693InitReader(void);
+extern void Iso15693InitTag(void);
+extern void CodeIso15693AsReader(uint8_t *cmd, int n);
+extern void CodeIso15693AsTag(uint8_t *cmd, size_t len);
+extern void TransmitTo15693Reader(const uint8_t *cmd, size_t len, uint32_t *start_time, uint32_t slot_time, bool slow);
+extern int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time);
+extern void TransmitTo15693Tag(const uint8_t *cmd, int len, uint32_t *start_time);
+extern int GetIso15693AnswerFromTag(uint8_t* response, uint16_t max_len, uint16_t timeout, uint32_t *eof_time);
+extern void SnoopIso15693(uint8_t jam_search_len, uint8_t *jam_search_string);
+extern void AcquireRawAdcSamplesIso15693(void);
+extern void ReaderIso15693(uint32_t parameter);
+extern void SimTagIso15693(uint32_t parameter, uint8_t *uid);
+extern void BruteforceIso15693Afi(uint32_t speed);
+extern void DirectTag15693Command(uint32_t datalen, uint32_t speed, uint32_t recv, uint8_t data[]);
+extern void SetTag15693Uid(uint8_t *uid);
+extern void SetDebugIso15693(uint32_t flag);
+extern bool LogTrace_ISO15693(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_start, uint32_t timestamp_end, uint8_t *parity, bool readerToTag);
#endif