參數(shù)資料
型號: PS2000ACQ
英文描述: A Network Communication Controller Designed to Connect Any MCU Application System To A Gateway(單片網(wǎng)絡(luò)通信控制器,用于控制MCU和網(wǎng)絡(luò)服務(wù)器之間的信息交換)
中文描述: 通信控制器的網(wǎng)絡(luò)連接任何設(shè)計單片機應(yīng)用系統(tǒng)到一個網(wǎng)關(guān)(單片網(wǎng)絡(luò)通信控制器,用于控制微控制器和網(wǎng)絡(luò)服務(wù)器之間的信息交換)
文件頁數(shù): 12/54頁
文件大?。?/td> 594K
代理商: PS2000ACQ
PS2000A Datasheet
Doc. Number:
TECINHD001
Version 1.0
3/1/2002
P&S DataCom Corporation
8
[99h, 80h, 00h, DID3, DID4, DID5, DID6, CRC]
The equivalent polynomial function of this CRC is: X
8
+X
5
+X
4
+1, where the array for
verification is:
DID7=CRC {DID0, DID1, DID2, DID3, DID4, DID5, DID6}
Here is the algorithm for the CRC value calculation in C language:
unsigned char DID[7] = {DID0, DID1, DID2, DID3, DID4, DID5, DID6};
unsigned char getCrc()
{
// X^8+X^5+X^4+1 =110001
unsigned char crc, oldCrc;
unsigned char i, j;
crc = 0;
for(i=0;i<7;i++ )
{
crc ^= DID[ i ] ;
for( int j = 0; j < 8; j ++ )
{
oldCrc = crc;
crc = crc << 1;
if( oldCrc & 0x80 )
crc ^= 0x31;
}
}
return crc;
}
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