diff --git a/demo/iap/ymodem+rtt.c b/demo/iap/ymodem+rtt.c
index 17bb24d..0b05a90 100644
--- a/demo/iap/ymodem+rtt.c
+++ b/demo/iap/ymodem+rtt.c
@@ -1,7 +1,7 @@
 /*
  * This file is part of the EasyFlash Library.
  *
- * Copyright (c) 2014, Armink, <armink.ztl@gmail.com>
+ * Copyright (c) 2015, Armink, <armink.ztl@gmail.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
diff --git a/demo/log/easylogger.c b/demo/log/easylogger.c
index 19a4579..046bad5 100644
--- a/demo/log/easylogger.c
+++ b/demo/log/easylogger.c
@@ -1,7 +1,7 @@
 /*
  * This file is part of the EasyFlash Library.
  *
- * Copyright (c) 2014, Armink, <armink.ztl@gmail.com>
+ * Copyright (c) 2015, Armink, <armink.ztl@gmail.com>
  *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files (the
diff --git a/easyflash/inc/easyflash.h b/easyflash/inc/easyflash.h
index 0667e3a..0ae00f8 100644
--- a/easyflash/inc/easyflash.h
+++ b/easyflash/inc/easyflash.h
@@ -62,7 +62,7 @@ if (!(EXPR))                                                                  \
     while (1);                                                                \
 }
 /* EasyFlash software version number */
-#define EF_SW_VERSION                "1.07.04"
+#define EF_SW_VERSION                "1.07.06"
 
 typedef struct _eflash_env{
     char *key;
@@ -121,7 +121,7 @@ size_t ef_log_get_used_size(void);
 #endif
 
 /* utils.c */
-uint32_t calc_crc32(uint32_t crc, const void *buf, size_t size);
+uint32_t ef_calc_crc32(uint32_t crc, const void *buf, size_t size);
 FlashSecrorStatus ef_get_sector_status(uint32_t addr, size_t sec_size);
 uint32_t ef_find_sec_using_end_addr(uint32_t addr, size_t sec_size);
 
diff --git a/easyflash/src/ef_env.c b/easyflash/src/ef_env.c
index 92db391..9ea389d 100644
--- a/easyflash/src/ef_env.c
+++ b/easyflash/src/ef_env.c
@@ -550,8 +550,8 @@ static uint32_t calc_env_crc(void) {
 
     /* Calculate the ENV end address and all ENV data CRC32.
      * The 4 is ENV end address bytes size. */
-    crc32 = calc_crc32(crc32, &env_cache[ENV_PARAM_INDEX_END_ADDR], 4);
-    crc32 = calc_crc32(crc32, &env_cache[ENV_PARAM_WORD_SIZE], get_env_data_size());
+    crc32 = ef_calc_crc32(crc32, &env_cache[ENV_PARAM_INDEX_END_ADDR], 4);
+    crc32 = ef_calc_crc32(crc32, &env_cache[ENV_PARAM_WORD_SIZE], get_env_data_size());
     EF_DEBUG("Calculate Env CRC32 number is 0x%08X.\n", crc32);
 
     return crc32;
diff --git a/easyflash/src/ef_env_wl.c b/easyflash/src/ef_env_wl.c
index 504839c..9b097be 100644
--- a/easyflash/src/ef_env_wl.c
+++ b/easyflash/src/ef_env_wl.c
@@ -662,8 +662,8 @@ static uint32_t calc_env_crc(void) {
 
     /* Calculate the ENV end address and all ENV data CRC32.
      * The 4 is ENV end address bytes size. */
-    crc32 = calc_crc32(crc32, &env_cache[ENV_PARAM_PART_INDEX_END_ADDR], 4);
-    crc32 = calc_crc32(crc32, &env_cache[ENV_PARAM_PART_WORD_SIZE], get_env_detail_size());
+    crc32 = ef_calc_crc32(crc32, &env_cache[ENV_PARAM_PART_INDEX_END_ADDR], 4);
+    crc32 = ef_calc_crc32(crc32, &env_cache[ENV_PARAM_PART_WORD_SIZE], get_env_detail_size());
     EF_DEBUG("Calculate Env CRC32 number is 0x%08X.\n", crc32);
 
     return crc32;
diff --git a/easyflash/src/ef_utils.c b/easyflash/src/ef_utils.c
index 728f6d9..0b2e23d 100644
--- a/easyflash/src/ef_utils.c
+++ b/easyflash/src/ef_utils.c
@@ -84,7 +84,7 @@ static const uint32_t crc32_table[] =
  *
  * @return calculated CRC32 value
  */
-uint32_t calc_crc32(uint32_t crc, const void *buf, size_t size)
+uint32_t ef_calc_crc32(uint32_t crc, const void *buf, size_t size)
 {
     const uint8_t *p;