/**
  ******************************************************************************
  * @file    fm33a0xxev_crc.c
  * @author  FM33A0XXEV Application Team
  * @version V1.0.0
  * @date    16-April-2020
  * @brief   This file provides firmware functions to manage the following 
  *          functionalities of....:
  *
*/

/* Includes ------------------------------------------------------------------*/

#include "fm33a0xxev_crc.h"

/** @addtogroup fm33a0xxev_StdPeriph_Driver
  * @{
  */

/** @defgroup CRC 
  * @brief CRC driver modules
  * @{
  */ 

/* CRCDRÓÃÓÚ×÷ΪÊý¾ÝÊäÈë¼Ä´æÆ÷£¬²¢ÇÒÔÚÔËËã½áÊøºó±£´æCRC¼ÆËã½á¹û¡£(CRC Data Register)
×÷ΪÊäÈëʱ£ºÈôword²Ù×÷ʹÄÜ£¬Ôò¶ÔCRCDR[31:0]½øÐмÆË㣬¹²4´ÎbyteÔËË㣨Óɵ͵½¸ß£©£»·ñÔò¶ÔCRCDR[7:0]½øÐмÆË㣬¹²1´ÎbyteÔËËã¡£
±£´æ½á¹ûʱ£ºÈôΪ7λ¶àÏîʽ½á¹û±£´æÔÚCRCDR[6:0]£¬ÈôΪ8λ¶àÏîʽ½á¹û±£´æÔÚCRCDR[7:0]£¬ÈôΪ16λ¶àÏîʽ½á¹û±£´æÔÚCRCDR[15:0]£¬ÈôΪ32λ¶àÏîʽ½á¹û±£´æÔÚCRCDR[31:0]¡£ Ïà¹Øº¯Êý */
void CRC_DR_Write(uint32_t SetValue)
{
	CRC->DR = (SetValue);
}

uint32_t CRC_DR_Read(void)
{
	return (CRC->DR);
}

/* WORD²Ù×÷ʹÄÜ (Operation by Word)
0£º×Ö½Ú²Ù×÷£¬CRC¼ÆËã½öÕë¶ÔCRCDR×îµÍ×Ö½Ú½øÐÐ
1£º×Ö²Ù×÷£¬CRC¼ÆËãÕë¶ÔCRCDRÈ«²¿4×Ö½Ú½øÐÐ Ïà¹Øº¯Êý */
void CRC_CR_OPWD_Set(uint32_t SetValue)
{
	uint32_t tmpreg;
	tmpreg = CRC->CR;
	tmpreg &= ~(CRC_CR_OPWD_Msk);
	tmpreg |= (SetValue & CRC_CR_OPWD_Msk);
	CRC->CR = tmpreg;
}

uint32_t CRC_CR_OPWD_Get(void)
{
	return (CRC->CR & CRC_CR_OPWD_Msk);
}

/* CRC¿ìËÙ¼ÆËãʹÄÜ (Parallel Calculation)
0£º´®ÐÐÔËË㣬¼ÆËã1¸ö×Ö½ÚÐèÒª8¸öʱÖÓÖÜÆÚ
1£º²¢ÐмÆË㣬¼ÆËã1¸ö×Ö½ÚÐèÒª1¸öʱÖÓÖÜÆÚ Ïà¹Øº¯Êý */
void CRC_CR_PARA_Set(uint32_t SetValue)
{
	uint32_t tmpreg;
	tmpreg = CRC->CR;
	tmpreg &= ~(CRC_CR_PARA_Msk);
	tmpreg |= (SetValue & CRC_CR_PARA_Msk);
	CRC->CR = tmpreg;
}

uint32_t CRC_CR_PARA_Get(void)
{
	return (CRC->CR & CRC_CR_PARA_Msk);
}

/* CRCÊäÈ뷴ת¿ØÖÆ (Reflected Input)
00£ºÊäÈë²»·´×ª
01£ºÊäÈë°´×Ö½Ú·´×ª
10£ºÊäÈë°´°ë×Ö·´×ª
11£ºÊäÈë°´×Ö·´×ª
ÀýÈ磺¼ÆËãÊý¾ÝΪ0x11223344£¬
Èç¹ûRFLTIN==01£¬Ôò½«Êý¾Ý±äΪ0x8844CC22£¬ÔÙ½øÐмÆËãÈç¹ûRFLTIN==10£¬Ôò½«Êý¾Ý±äΪ0x448822CC£¬ÔÙ½øÐмÆËã
Èç¹ûRFLTIN==11£¬Ôò½«Êý¾Ý±äΪ0x22CC4488£¬ÔÙ½øÐмÆËã Ïà¹Øº¯Êý */
void CRC_CR_RFLTIN_Set(uint32_t SetValue)
{
	uint32_t tmpreg;
	tmpreg = CRC->CR;
	tmpreg &= ~(CRC_CR_RFLTIN_Msk);
	tmpreg |= (SetValue & CRC_CR_RFLTIN_Msk);
	CRC->CR = tmpreg;
}

uint32_t CRC_CR_RFLTIN_Get(void)
{
	return (CRC->CR & CRC_CR_RFLTIN_Msk);
}

/* CRCÊä³ö·´×ª¿ØÖÆ (Reflected Output)
0£ºÊäÈë²»·´×ª
1£ºÊäÈë°´×Ö½Ú·´×ª
ÀýÈ磺
Èç¹ûRFLTO==1£¬Èôµ±Ç°¼ÆËãµÄCRC½á¹ûΪ0x1234£¬ÔòÊä³öµÄ½á¹ûΪ0x2C48Èç¹û RFLTO==0£¬ÔòÖ±½ÓÊä³ö0x1234×¢Ò⣺´Ë½á¹û²»Ò»¶¨Îª×îÖÕÊä³ö½á¹û£¬»¹ÐèÒª¿´XORÊÇ·ñΪ1£¬Ïê¼û±¾¼Ä´æÆ÷bit2˵Ã÷ Ïà¹Øº¯Êý */
void CRC_CR_RFLTO_Set(uint32_t SetValue)
{
	uint32_t tmpreg;
	tmpreg = CRC->CR;
	tmpreg &= ~(CRC_CR_RFLTO_Msk);
	tmpreg |= (SetValue & CRC_CR_RFLTO_Msk);
	CRC->CR = tmpreg;
}

uint32_t CRC_CR_RFLTO_Get(void)
{
	return (CRC->CR & CRC_CR_RFLTO_Msk);
}

/* CRC½á¹û±ê־λ£¬Ö»¶Á (Result Flag)
0£ºCRC½á¹ûΪ0
1£ºCRC½á¹û·ÇÈ«0 Ïà¹Øº¯Êý */
FlagStatus CRC_CR_RES_Chk(void)
{
	if (CRC->CR & CRC_CR_RES_Msk)
	{
		return SET;
	}
	else
	{
		return RESET;
	}
}

/* CRCÔËËã±ê־λ£¬Ö»¶Á (Busy)
0£ºCRCÔËËã½áÊø
1£ºCRCÔËËã½øÐÐÖÐ Ïà¹Øº¯Êý */
FlagStatus CRC_CR_BUSY_Chk(void)
{
	if (CRC->CR & CRC_CR_BUSY_Msk)
	{
		return SET;
	}
	else
	{
		return RESET;
	}
}

/* Êä³öÒì»òʹÄÜ (Output XORed with CRC_XOR register enable)
0£ºÊä³ö²»Òì»òCRC_XOR¼Ä´æÆ÷
1£ºÊä³öÒì»òCRC_XOR¼Ä´æÆ÷ Ïà¹Øº¯Êý */
void CRC_CR_XOR_Setable(FunState NewState)
{
	if (NewState == ENABLE)
	{
		CRC->CR |= (CRC_CR_XOR_Msk);
	}
	else
	{
		CRC->CR &= ~(CRC_CR_XOR_Msk);
	}
}

FunState CRC_CR_XOR_Getable(void)
{
	if (CRC->CR & (CRC_CR_XOR_Msk))
	{
		return ENABLE;
	}
	else
	{
		return DISABLE;
	}
}

/* CRC¶àÏîʽλ¿íÑ¡Ôñ (Polynomial width Selection)
00£º32λ
01£º16λ
10£º8λ
11£º7λ Ïà¹Øº¯Êý */
void CRC_CR_SEL_Set(uint32_t SetValue)
{
	uint32_t tmpreg;
	tmpreg = CRC->CR;
	tmpreg &= ~(CRC_CR_SEL_Msk);
	tmpreg |= (SetValue & CRC_CR_SEL_Msk);
	CRC->CR = tmpreg;
}

uint32_t CRC_CR_SEL_Get(void)
{
	return (CRC->CR & CRC_CR_SEL_Msk);
}

/* CRCÏßÐÔ·´À¡ÒÆλ¼Ä´æÆ÷ (Linear Feedback Shift Register)
ÔËË㿪ʼǰ¿ÉÒÔÓÉÈí¼þдÈëCRC³õʼֵ Ïà¹Øº¯Êý */
void CRC_LFSR_Write(uint32_t SetValue)
{
	CRC->LFSR = (SetValue);
}

uint32_t CRC_LFSR_Read(void)
{
	return (CRC->LFSR);
}

/* CRCÔËËã½á¹ûÒì»ò¼Ä´æÆ÷ (eXclusive OR)
µ±CRC_CR.XORΪ1ʱ£¬CRC½á¹ûÊä³öÇ°½«Òì»ò´Ë¼Ä´æÆ÷µÄÊý¾Ý¡£ Ïà¹Øº¯Êý */
void CRC_XOR_Write(uint32_t SetValue)
{
	CRC->XOR = (SetValue);
}

uint32_t CRC_XOR_Read(void)
{
	return (CRC->XOR);
}

/* CRCÔËËã¶àÏîʽϵÊý (CRC Polynominals) Ïà¹Øº¯Êý */
void CRC_POLY_Write(uint32_t SetValue)
{
	CRC->POLY = (SetValue);
}

uint32_t CRC_POLY_Read(void)
{
	return (CRC->POLY);
}


void CRC_Deinit(void)
{
	//CRC->DR = 0xFFFFFFFF;
	//CRC->CR = 0x00000002;
	//CRC->LFSR = 0xFFFFFFFF;
	//CRC->XOR = 0x00000000;
	//CRC->POLY = 0x00000000;
}
//Code_End

/* CRC³õʼ»¯ÅäÖú¯Êý*/
void CRC_Init(CRC_InitTypeDef* para)
{
	CRC_LFSR_Write(para->LFSR);				/*!<³õÖµ¼Ä´æÆ÷*/
	CRC_CR_SEL_Set(para->CRCSEL);			/*!<CRCУÑé¶àÏîʽλ¿íÑ¡Ôñ*/
	CRC_CR_OPWD_Set(para->OPWD);			/*!<WORD²Ù×÷ʹÄÜ*/
	CRC_CR_PARA_Set(para->PARA);			/*!<CRC¿ìËÙ¼ÆËãʹÄÜ*/
	CRC_CR_RFLTIN_Set(para->RFLTIN);	    /*!<CRCÊäÈ뷴ת¿ØÖÆ*/
	CRC_CR_RFLTO_Set(para->RFLTO);		    /*!<CRCÊä³ö·´×ª¿ØÖÆ*/
	CRC_CR_XOR_Setable(para->XOR);		    /*!<Êä³öÒì»òʹÄÜ*/
	CRC_XOR_Write(para->CRC_XOR);			/*!<ÔËËã½á¹ûÒì»ò¼Ä´æÆ÷*/
	CRC_POLY_Write(para->CRCPOLY);		    /*!<CRC¶àÏîʽ¼Ä´æÆ÷*/
}

/******END OF FILE****/