HAL CRC: Add bit width parameter to crc_config_t

Author: Steven Cartmell

drivers/MbedCRC.h

@@ -203,6 +203,7 @@ class MbedCRC
         if (_mode == HARDWARE) {
             crc_mbed_config_t config;
             config.polynomial  = polynomial;
+            config.width       = width;
             config.initial_xor = _initial_value;
             config.final_xor   = _final_xor;
             config.reflect_in  = _reflect_data;
@@ -440,6 +441,7 @@ class MbedCRC
 #ifdef DEVICE_CRC
         crc_mbed_config_t config;
         config.polynomial  = polynomial;
+        config.width       = width;
         config.initial_xor = _initial_value;
         config.final_xor   = _final_xor;
         config.reflect_in  = _reflect_data;

hal/crc_api.h

@@ -38,6 +38,8 @@ typedef enum crc_polynomial {
 typedef struct crc_mbed_config {
     /// CRC Polynomial. Example polynomial: 0x21 = 0010_0011 = x^5+x+1
     uint32_t polynomial;
+    /// CRC Bit Width
+    uint32_t width;
     /// Initial seed value for the computation.
     uint32_t initial_xor;
     /// Final xor value for the computation.

targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/TARGET_MCU_K64F/mbed_crc_api.c

@@ -12,7 +12,7 @@ bool hal_crc_is_supported(const crc_mbed_config_t* config)
   if (config == NULL)
     return false;
 
-  if ((config->polynomial & 0x80008000) == 0)
+  if ((config->width != 32) || (config->width != 16))
     return false;
 
   return true;