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This commit is contained in:
skarg
2007-11-29 15:56:53 +00:00
parent c585241c03
commit 411d6c1b24
236 changed files with 17864 additions and 15724 deletions
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bacnet-stack/src/crc.c
+31 -20
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@@ -38,8 +38,7 @@
#if defined(CRC_USE_TABLE)
/* note: table is created using unit test below */
static const uint8_t HeaderCRC[256] =
{
static const uint8_t HeaderCRC[256] = {
0x00, 0xfe, 0xff, 0x01, 0xfd, 0x03, 0x02, 0xfc,
0xf9, 0x07, 0x06, 0xf8, 0x04, 0xfa, 0xfb, 0x05,
0xf1, 0x0f, 0x0e, 0xf0, 0x0c, 0xf2, 0xf3, 0x0d,
@@ -74,14 +73,15 @@ static const uint8_t HeaderCRC[256] =
0xa9, 0x57, 0x56, 0xa8, 0x54, 0xaa, 0xab, 0x55
};
uint8_t CRC_Calc_Header(uint8_t dataValue, uint8_t crcValue)
uint8_t CRC_Calc_Header(
uint8_t dataValue,
uint8_t crcValue)
{
return HeaderCRC[crcValue ^ dataValue];
}
/* note: table is created using unit test below */
static const uint16_t DataCRC[256] =
{
static const uint16_t DataCRC[256] = {
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
@@ -116,7 +116,9 @@ static const uint16_t DataCRC[256] =
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};
uint16_t CRC_Calc_Data(uint8_t dataValue, uint16_t crcValue)
uint16_t CRC_Calc_Data(
uint8_t dataValue,
uint16_t crcValue)
{
return ((crcValue >> 8) ^ DataCRC[(crcValue & 0x00FF) ^ dataValue]);
@@ -127,7 +129,9 @@ uint16_t CRC_Calc_Data(uint8_t dataValue, uint16_t crcValue)
/* */
/* The ^ operator means exclusive OR. */
/* Note: This function is copied directly from the BACnet standard. */
uint8_t CRC_Calc_Header(uint8_t dataValue, uint8_t crcValue)
uint8_t CRC_Calc_Header(
uint8_t dataValue,
uint8_t crcValue)
{
uint16_t crc;
@@ -147,7 +151,9 @@ uint8_t CRC_Calc_Header(uint8_t dataValue, uint8_t crcValue)
/* */
/* The ^ operator means exclusive OR. */
/* Note: This function is copied directly from the BACnet standard. */
uint16_t CRC_Calc_Data(uint8_t dataValue, uint16_t crcValue)
uint16_t CRC_Calc_Data(
uint8_t dataValue,
uint16_t crcValue)
{
uint16_t crcLow;
@@ -167,10 +173,11 @@ uint16_t CRC_Calc_Data(uint8_t dataValue, uint16_t crcValue)
#include "bytes.h"
/* test from Annex G 1.0 of BACnet Standard */
void testCRC8(Test * pTest)
void testCRC8(
Test * pTest)
{
uint8_t crc = 0xff; /* accumulates the crc value */
uint8_t frame_crc; /* appended to the end of the frame */
uint8_t crc = 0xff; /* accumulates the crc value */
uint8_t frame_crc; /* appended to the end of the frame */
crc = CRC_Calc_Header(0x00, crc);
ct_test(pTest, crc == 0x55);
@@ -192,7 +199,8 @@ void testCRC8(Test * pTest)
}
/* test from Annex G 2.0 of BACnet Standard */
void testCRC16(Test * pTest)
void testCRC16(
Test * pTest)
{
uint16_t crc = 0xffff;
uint16_t data_crc;
@@ -213,19 +221,20 @@ void testCRC16(Test * pTest)
ct_test(pTest, crc == 0xF0B8);
}
void testCRC8CreateTable(Test *pTest)
void testCRC8CreateTable(
Test * pTest)
{
uint8_t crc = 0xff; /* accumulates the crc value */
uint8_t crc = 0xff; /* accumulates the crc value */
int i;
(void)pTest;
(void) pTest;
printf("static const uint8_t HeaderCRC[256] =\n");
printf("{\n");
printf(" ");
for (i = 0; i < 256; i++) {
crc = CRC_Calc_Header(i, 0);
printf("0x%02x, ", crc);
if (!((i+1)%8)) {
if (!((i + 1) % 8)) {
printf("\n");
if (i != 255) {
printf(" ");
@@ -235,19 +244,20 @@ void testCRC8CreateTable(Test *pTest)
printf("};\n");
}
void testCRC16CreateTable(Test *pTest)
void testCRC16CreateTable(
Test * pTest)
{
uint16_t crc;
int i;
(void)pTest;
(void) pTest;
printf("static const uint16_t DataCRC[256] =\n");
printf("{\n");
printf(" ");
for (i = 0; i < 256; i++) {
crc = CRC_Calc_Data(i, 0);
printf("0x%04x, ", crc);
if (!((i+1)%8)) {
if (!((i + 1) % 8)) {
printf("\n");
if (i != 255) {
printf(" ");
@@ -260,7 +270,8 @@ void testCRC16CreateTable(Test *pTest)
#endif
#ifdef TEST_CRC
int main(void)
int main(
void)
{
Test *pTest;
bool rc;