crc16 keil c51
#pragma small#include <reg52.h>
unsigned int CRC_16(unsigned int c,unsigned char d);
unsigned int crc16=0;
void main(void)
{
//unsigned char crcbuff[] = {31,3,0,1,0,7};
unsigned char crcbuff[] = "123456789";
unsigned char *p;
//unsigned int crc16 = 0xffff;
p=crcbuff;
while(*p !='\0')
{
crc16 = CRC_16(crc16,*p++);
}
p=crcbuff;
}
unsigned int CRC_16(unsigned int c,unsigned char d)
{
unsigned int data e;
unsigned char data f;
e = c^(unsigned int)d;
for(f=0;f<8;f++)
{
if(e&1)
{
e >>= 1;
e ^= 0xa001;
}
else e >>= 1;
}
return e;
}
// 使用字符串"123456789"测试,crc16初始值为0时
// 结果为0xbb3d 符合crc caculator
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