blob: 3919466987421ecafcae523c2104c92a23f20c8e (
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
|
/*
* Checksum.c
*
* Created on: May 7, 2020
* Author: avi
*/
#include <stdint.h>
#include <stdbool.h>
#include "Include.h"
//*****************************************************************************
//
//! CheckSum() Calculates an 8 bit checksum
//!
//! \param pui8Data is a pointer to an array of 8 bit data of size ui8Size.
//! \param ui8Size is the size of the array that will run through the checksum
//! algorithm.
//!
//! This function simply calculates an 8 bit checksum on the data passed in.
//!
//! \return The function returns the calculated checksum.
//
//*****************************************************************************
uint8_t
CheckSum8bit(uint8_t *pui8Data, uint8_t ui8Size)
{
int32_t i;
uint8_t ui8CheckSum;
ui8CheckSum = 0;
for(i = 0; i < ui8Size; ++i)
{
ui8CheckSum += pui8Data[i];
}
return(ui8CheckSum);
}
//*****************************************************************************
//
//! Calculates an 8-bit checksum
//!
//! \param pui8Data is a pointer to an array of 8-bit data of size ui32Size.
//! \param ui32Size is the size of the array that will run through the checksum
//! algorithm.
//!
//! This function simply calculates an 8-bit checksum on the data passed in.
//!
//! \return Returns the calculated checksum.
//
//*****************************************************************************
uint32_t
CheckSum32bit(const uint8_t *pui8Data, uint32_t ui32Size)
{
uint32_t ui32CheckSum;
//
// Initialize the checksum to zero.
//
ui32CheckSum = 0;
//
// Add up all the bytes, do not do anything for an overflow.
//
while(ui32Size--)
{
ui32CheckSum += *pui8Data++;
}
//
// Return the calculated check sum.
//
return(ui32CheckSum & 0xff);
}
|
