X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=bertos%2Falgo%2Fcrc.h;h=c5c1eefddb5b161061bb66e9c7e4d53385f91ef0;hb=369b505bc0aed841c8e7452f2be09a95900885db;hp=bc442b7e19d942356c665c139eb4dce1df257bdf;hpb=4cc44c9888a0336b9d01121ec0b7ad95f4a76195;p=bertos.git

diff --git a/bertos/algo/crc.h b/bertos/algo/crc.h
index bc442b7e..c5c1eefd 100644
--- a/bertos/algo/crc.h
+++ b/bertos/algo/crc.h
@@ -31,7 +31,7 @@
  *
  * -->
  *
- * \brief XModem-CRC16 algorithm (interface)
+ * \brief Cyclic Redundancy Check 16 (CRC). This algorithm is the one used by the XMODEM protocol.
  *
  * \note This algorithm is incompatible with the CCITT-CRC16.
  *
@@ -43,19 +43,20 @@
  * to Stephen Satchell, Satchell Evaluations and Chuck Forsberg,
  * Omen Technology.
  *
- * \version $Id$
  * \author Bernie Innocenti <bernie@codewiz.org>
+ *
+ * $WIZ$ module_name = "crc16"
  */
 
 #ifndef ALGO_CRC_H
 #define ALGO_CRC_H
 
-#include <cfg/compiler.h>
+#include "cfg/cfg_arch.h"
 
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
+#include <cfg/compiler.h>
+#include <cpu/pgm.h>
 
+EXTERN_C_BEGIN
 
 /* CRC table */
 extern const uint16_t crc16tab[256];
@@ -70,16 +71,26 @@ extern const uint16_t crc16tab[256];
  * \param c New octet (range 0-255)
  * \param oldcrc Previous CRC16 value (referenced twice, beware of side effects)
  */
-#define UPDCRC16(c, oldcrc) (crc16tab[((oldcrc) >> 8) ^ ((unsigned char)(c))] ^ ((oldcrc) << 8))
+#if CPU_HARVARD && !(defined(ARCH_BOOT) && (ARCH & ARCH_BOOT))
+	#define UPDCRC16(c, oldcrc) (pgm_read_uint16_t(&crc16tab[((oldcrc) >> 8) ^ ((unsigned char)(c))]) ^ ((oldcrc) << 8))
+#else
+	#define UPDCRC16(c, oldcrc) ((crc16tab[((oldcrc) >> 8) ^ ((unsigned char)(c))]) ^ ((oldcrc) << 8))
+#endif
 
+/** CRC-16 init value */
+#define CRC16_INIT_VAL ((uint16_t)0)
 
 #ifdef INLINE
 /**
- * \brief Compute the updated CRC16 value for one octet (macro version)
+ * \brief Compute the updated CRC16 value for one octet (inline version)
  */
 INLINE uint16_t updcrc16(uint8_t c, uint16_t oldcrc)
 {
+#if CPU_HARVARD && !(defined(ARCH_BOOT) && (ARCH & ARCH_BOOT))
+	return pgm_read_uint16_t(&crc16tab[(oldcrc >> 8) ^ c]) ^ (oldcrc << 8);
+#else
 	return crc16tab[(oldcrc >> 8) ^ c] ^ (oldcrc << 8);
+#endif
 }
 #endif // INLINE
 
@@ -95,8 +106,10 @@ INLINE uint16_t updcrc16(uint8_t c, uint16_t oldcrc)
  */
 extern uint16_t crc16(uint16_t crc, const void *buf, size_t len);
 
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
+int crc_testSetup(void);
+int crc_testRun(void);
+int crc_testTearDown(void);
+
+EXTERN_C_END
 
 #endif /* ALGO_CRC_H */