-extern int LegicRfReader(int offset, int bytes, int iv);
-extern void LegicRfWriter(int offset, int bytes, int iv);
-extern void LegicRfRawWriter(int address, int data, int iv);
+extern int LegicRfReader(uint16_t offset, uint16_t len, uint8_t iv);
+extern void LegicRfWriter(uint16_t offset, uint16_t byte, uint8_t iv);
+extern void LegicRfRawWriter(int address, int data, uint8_t iv);