blob: ac8c7c4c7d9f8aeb8ce0f3520b37f9ad37b89db4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : stm32f10x_crc.c
* Author : MCD Application Team
* Version : V2.0.2
* Date : 07/11/2008
* Description : This file provides all the CRC firmware functions.
********************************************************************************
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
* AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
* INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
* CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x_crc.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* CR register bit mask */
#define CR_RESET_Set ((u32)0x00000001)
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : CRC_ResetDR
* Description : Resets the CRC Data register (DR).
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void CRC_ResetDR(void)
{
/* Reset CRC generator */
CRC->CR = CR_RESET_Set;
}
/*******************************************************************************
* Function Name : CRC_CalcCRC
* Description : Computes the 32-bit CRC of a given data word(32-bit).
* Input : - Data: data word(32-bit) to compute its CRC
* Output : None
* Return : 32-bit CRC
*******************************************************************************/
u32 CRC_CalcCRC(u32 Data)
{
CRC->DR = Data;
return (CRC->DR);
}
/*******************************************************************************
* Function Name : CRC_CalcBlockCRC
* Description : Computes the 32-bit CRC of a given buffer of data word(32-bit).
* Input : - pBuffer: pointer to the buffer containing the data to be
* computed
* - BufferLength: length of the buffer to be computed
* Output : None
* Return : 32-bit CRC
*******************************************************************************/
u32 CRC_CalcBlockCRC(u32 pBuffer[], u32 BufferLength)
{
u32 index = 0;
for(index = 0; index < BufferLength; index++)
{
CRC->DR = pBuffer[index];
}
return (CRC->DR);
}
/*******************************************************************************
* Function Name : CRC_GetCRC
* Description : Returns the current CRC value.
* Input : None
* Output : None
* Return : 32-bit CRC
*******************************************************************************/
u32 CRC_GetCRC(void)
{
return (CRC->DR);
}
/*******************************************************************************
* Function Name : CRC_SetIDRegister
* Description : Stores a 8-bit data in the Independent Data(ID) register.
* Input : - IDValue: 8-bit value to be stored in the ID register
* Output : None
* Return : None
*******************************************************************************/
void CRC_SetIDRegister(u8 IDValue)
{
CRC->IDR = IDValue;
}
/*******************************************************************************
* Function Name : CRC_GetIDRegister
* Description : Returns the 8-bit data stored in the Independent Data(ID) register
* Input : None
* Output : None
* Return : 8-bit value of the ID register
*******************************************************************************/
u8 CRC_GetIDRegister(void)
{
return (CRC->IDR);
}
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
|
