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allbus.c
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allbus.c
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#include "allbus.h"
unsigned short crctab[256] =
{
0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
};
unsigned short Calc_crc256(unsigned short crc, unsigned char *cp, unsigned int cnt, unsigned char i)
{
while( cnt-- ) {crc = (crc<<8) ^ crctab[(crc>>8) ^ cp[i++]];}
return( crc );
}
unsigned short Calc_crc_back(unsigned short crc, unsigned char *cp, unsigned int cnt, unsigned int i)
{
while( cnt-- ) crc = (crc << 8) ^ crctab[(crc >> 8) ^ cp[i--]];
return( crc );
}
/*
int ALLBUS_send(unsigned char addr, unsigned char com, unsigned short data_size, unsigned char* Uart_buf, unsigned char *Data_buf, USART_TypeDef* uart)
{
int Buf_size = 5 + data_size + 2;
unsigned short sum;
int i = Buf_size - 1, j;
Uart_buf[i--] = addr; //????? ??????????
Uart_buf[i--] = com | ((unsigned char)data_size << 6);//??? ??????/???????
Uart_buf[i--] = (unsigned char)data_size >> 2;//?????? ???? ??????
sum = Calc_crc_back(0, Uart_buf, 3, Buf_size - 1);//??????? ??????????? ????? ?????????
Uart_buf[i--] = (unsigned char)sum ;//??????? ???? ??????????? ????? ?????????
Uart_buf[i--] = (unsigned char)(sum >> 8);//??????? ???? ??????????? ????? ?????????
for(j = 0; j < data_size; j++) Uart_buf[i--] = Data_buf[j];
sum = Calc_crc_back(sum, Uart_buf, data_size + 2, Buf_size - 4);//??????? ??????????? ????? ???? ??????
Uart_buf[i--] = (unsigned char)sum ;//??????? ???? ??????????? ????? ???? ??????
Uart_buf[i] = (unsigned char)(sum >> 8);//??????? ???? ??????????? ????? ???? ??????
uart->DR = Uart_buf[Buf_size - 1];//?????? ???? ?????????
return Buf_size - 1;
}
*/
void ALLBUS_send(unsigned char addr, unsigned char com, unsigned short data_size, unsigned char* Uart_buf, unsigned char *Data_buf)
{
unsigned short sum;
int i = 0, j;
Uart_buf[i++] = addr; //????? ??????????
Uart_buf[i++] = com | ((unsigned char)data_size << 6);//??? ??????/???????
Uart_buf[i++] = (unsigned char)data_size >> 2;//?????? ???? ??????
sum = Calc_crc256(0, Uart_buf, 3, 0); //??????? ??????????? ????? ???? ??????
Uart_buf[i++] = (unsigned char)sum ;//??????? ???? ??????????? ????? ?????????
Uart_buf[i++] = (unsigned char)(sum >> 8);//??????? ???? ??????????? ????? ?????????
for(j = 0; j < data_size; j++) Uart_buf[i++] = Data_buf[j]; //??????????? ??????
sum = Calc_crc256(sum, Uart_buf, data_size + 2, 3); //??????? ??????????? ????? ???? ??????
Uart_buf[i++] = (uint8_t)sum ;//??????? ???? ??????????? ????? ???? ??????
Uart_buf[i++] = (uint8_t)(sum >> 8);//??????? ???? ??????????? ????? ???? ??????
// uart->DR = Uart_buf[0];//?????? ???? ?????????
// return 1;
}
int ALLBUS_recieve(unsigned char* in_buf, unsigned char first, unsigned char last, int com_addr, int addr_addr)
{
unsigned char addr, com, size;
unsigned char i = first;
unsigned short crc_in, crc_sum;
int pocket_size;
int rezult;
addr = in_buf[i++];//????? ??????????
com = in_buf[i++];
size = (com >> 6) + ((unsigned short)in_buf[i++] << 2);//?????? ???? ??????
com &= 0x3F;//??? ??????/???????
crc_in = (unsigned short)in_buf[i++];//??????? ???? ??????????? ????? ?????????
crc_in |= ((unsigned short)in_buf[i++] << 8);//??????? ???? ??????????? ????? ?????????
crc_sum = Calc_crc256(0, in_buf, 3, first);//??????? ??????????? ????? ?????????
if(crc_in == crc_sum)//????????? ??????
{
if(size == 0)
{
*(uint8_t*)addr_addr = addr;
*(uint8_t*)com_addr = com;
}
else
{
pocket_size = (last >= first) ? (last - first) : (last + 0x100 - first);
if((size + 7) <= pocket_size)//????? ?????? ?????????
{
if(size > 0)//????? ??????? ??????
{
i += size;
crc_in = (unsigned short)in_buf[i++];//??????? ???? ??????????? ????? ??????
crc_in |= ((unsigned short)in_buf[i] << 8);//??????? ???? ??????????? ????? ??????
crc_sum = Calc_crc256(crc_sum, in_buf, size + 2, first + 3);//??????? ??????????? ????? ???? ??????
if(crc_in == crc_sum)//????? ??????
{
*(uint8_t*)addr_addr = addr;
*(uint8_t*)com_addr = com;
}
else {;}
}
rezult = i;
}
else rezult = -1;//????? ?????? ???????????
}
}
else rezult = -2;//????????? ????????
return rezult;
}
unsigned char Compare_counters(unsigned short last, unsigned short first, int difference, int size)
{
int larger = 0;
if(first > last)
{
if(first >= last + difference) larger = 1;
}
if(first < last)
{
if(first + size >= last + difference) larger = 1;
}
return larger;
}