From a5a03c98a94d75f07ff1aee93c711280ecfd4cea Mon Sep 17 00:00:00 2001
From: Ryo Suzumoto <ryo.suzumoto@gmail.com>
Date: Tue, 20 Sep 2022 11:37:18 +0900
Subject: [PATCH] enable crc ccitt right

---
 Library/crc.c | 4 ----
 Library/crc.h | 3 ---
 2 files changed, 7 deletions(-)

diff --git a/Library/crc.c b/Library/crc.c
index 350246205..2f71a8cc4 100644
--- a/Library/crc.c
+++ b/Library/crc.c
@@ -75,7 +75,6 @@ static const uint16_t CRC_kCrc16CcittLeftTable_[256] = {
     0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
 };
 
-#if 0
 static const uint16_t CRC_kCrc16CcittRightTable_[256] = {
     0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
     0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
@@ -110,7 +109,6 @@ static const uint16_t CRC_kCrc16CcittRightTable_[256] = {
     0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
     0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
 };
-#endif
 
 uint16_t CRC_calc_crc_16_ibm_right(uint16_t crc, const uint8_t* c, size_t n, int rev_flag)
 {
@@ -138,7 +136,6 @@ uint16_t CRC_calc_crc_16_ccitt_left(uint16_t crc, const uint8_t* c, size_t n, in
   else return crc;
 }
 
-#if 0
 uint16_t CRC_calc_crc_16_ccitt_right(uint16_t crc, const uint8_t* c, size_t n, int rev_flag)
 {
   size_t i;
@@ -151,7 +148,6 @@ uint16_t CRC_calc_crc_16_ccitt_right(uint16_t crc, const uint8_t* c, size_t n, i
   if (rev_flag) return (uint16_t)~crc;
   else return crc;
 }
-#endif
 
 void CRC_make_crc_8_table(uint8_t* table, uint8_t crc_poly, uint8_t shift)
 {
diff --git a/Library/crc.h b/Library/crc.h
index 081d80df0..6116792f7 100644
--- a/Library/crc.h
+++ b/Library/crc.h
@@ -36,8 +36,6 @@ uint16_t CRC_calc_crc_16_ibm_right(uint16_t crc, const uint8_t* c, size_t n, int
  */
 uint16_t CRC_calc_crc_16_ccitt_left(uint16_t crc, const uint8_t* c, size_t n, int rev_flag);
 
-// 右送りの CCITT は一般的ではないこと， table でメモリを使うので，一旦無効化
-#if 0
 /**
  * @brief CRC-16-CCITT
  *
@@ -51,7 +49,6 @@ uint16_t CRC_calc_crc_16_ccitt_left(uint16_t crc, const uint8_t* c, size_t n, in
  * @return uint16_t: 計算結果
  */
 uint16_t CRC_calc_crc_16_ccitt_right(uint16_t crc, const uint8_t* c, size_t n, int rev_flag);
-#endif
 
 /**
  * @brief crc用のテーブル作成