Remove support for 7/8 bit CRC polynomials for K64F

Author: Steven Cartmell

hal/crc_api.h

@@ -1,3 +1,20 @@
+/** \addtogroup hal */
+/** @{*/
+/* mbed Microcontroller Library
+ * Copyright (c) 2018 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 #ifndef MBED_CRC_HAL_API_H
 #define MBED_CRC_HAL_API_H
 
@@ -24,6 +41,15 @@ typedef enum crc_polynomial {
 extern "C" {
 #endif
 
+/**
+ * \defgroup hal_crc Hardware CRC
+ *
+ * The Hardware CRC HAL API provides a low-level interface to the Hardware CRC
+ * module of a target platform.
+ *
+ * @{
+ */
+
 /** Determine if the current platform supports hardware CRC for given polynomial
  *
  * The purpose of this function is to inform the CRC Platform API whether the
@@ -122,9 +148,13 @@ void hal_crc_compute_partial(const uint8_t *data, const size_t size);
  */
 uint32_t hal_crc_get_result(void);
 
+/**@}*/
+
 #ifdef __cplusplus
 };
 #endif
 
 #endif // DEVICE_CRC
 #endif // MBED_CRC_HAL_API_H
+
+/**@}*/

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K64F/mbed_crc_api.c

@@ -11,12 +11,13 @@ bool hal_crc_is_supported(const uint32_t polynomial)
 {
   switch (polynomial)
   {
-    case POLY_8BIT_CCITT:
-    case POLY_7BIT_SD:
     case POLY_16BIT_CCITT:
     case POLY_16BIT_IBM:
     case POLY_32BIT_ANSI:
       return true;
+    case POLY_8BIT_CCITT:
+    case POLY_7BIT_SD:
+      return false;
     default:
       return false;
   }
@@ -70,34 +71,9 @@ void hal_crc_compute_partial_start(const uint32_t polynomial)
 
       break;
     }
-    case POLY_8BIT_CCITT:
-    {
-      width = kCrcBits16;
-
-      config.polynomial         = polynomial;
-      config.seed               = 0U;
-      config.reflectIn          = false;
-      config.reflectOut         = false;
-      config.complementChecksum = false;
-      config.crcBits            = width;
-      config.crcResult          = kCrcFinalChecksum;
-
-      break;
-    }
-    case POLY_7BIT_SD:
-    {
-      width = kCrcBits16;
-
-      config.polynomial         = polynomial;
-      config.seed               = 0U;
-      config.reflectIn          = false;
-      config.reflectOut         = false;
-      config.complementChecksum = false;
-      config.crcBits            = width;
-      config.crcResult          = kCrcFinalChecksum;
-
+    default:
+      MBED_ASSERT("Configuring Mbed CRC with unsupported polynomial");
       break;
-    }
   }
 
   CRC_Init(CRC0, &config);