为n32g45x添加硬件CRC支持 (#5852)

* 为n32g45x添加硬件CRC支持

基于stm32的驱动文件进行改造，目前modbus的crc16和mpeg2的crc32测试正常

bsp/n32g452xx/Libraries/rt_drivers/SConscript

@@ -57,7 +57,10 @@ if GetDepend(['BSP_USING_CAN']):
 
 if GetDepend(['BSP_USING_SDIO']):
     src += ['drv_sdio.c']
-
+    
+if GetDepend(['RT_USING_HWCRYPTO']):
+    src += ['drv_crypto.c']
+    
 CPPPATH = [cwd]
 
 group = DefineGroup('Drivers', src, depend = [''], CPPPATH = CPPPATH)

bsp/n32g452xx/Libraries/rt_drivers/drv_crypto.h

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2006-2022, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author            Notes
+ * 2022-04-21     wolfJane          first version
+ */
+
+#ifndef __DRV_CRYPTO_H_
+#define __DRV_CRYPTO_H_
+
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <n32g45x.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define CRC32_PLOY  (0x04C11DB7)
+#define CRC16_PLOY  (0x8005)
+
+struct n32_hwcrypto_device
+{
+    struct rt_hwcrypto_device dev;
+    struct rt_mutex mutex;
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __DRV_CRYPTO_H_ */