[an error occurred while processing this directive]
|
void DoFEC_Mobitex(uint16_t &Data) {
// input:
// Add FEC:
// Data:
// bits 15...8 - data byte
// bits 7...4 - 0000
// bits 3...0 - any
// Check FEC:
// Data:
// bits 15...8 - data byte
// bits 7...4 - FEC
// bits 3...0 - anyData &= ~0xF; // clear bits 3...0
if(Data & (1u << 15)) Data ^= (1<<3)|(1<<2)|(1<<1)|(0<<0);
if(Data & (1u << 14)) Data ^= (1<<3)|(1<<2)|(0<<1)|(1<<0);
if(Data & (1u << 13)) Data ^= (1<<3)|(0<<2)|(1<<1)|(1<<0);
if(Data & (1u << 12)) Data ^= (0<<3)|(1<<2)|(1<<1)|(1<<0);
if(Data & (1u << 11)) Data ^= (1<<3)|(0<<2)|(1<<1)|(0<<0);
if(Data & (1u << 10)) Data ^= (1<<3)|(0<<2)|(0<<1)|(1<<0);
if(Data & (1u << 9)) Data ^= (0<<3)|(1<<2)|(1<<1)|(0<<0);
if(Data & (1u << 8)) Data ^= (0<<3)|(1<<2)|(0<<1)|(1<<0);
Data ^= (Data >> 4) & 0x0F;// output:
// Add FEC:
// Data:
// bits 15...8 - data byte
// bits 7...4 - 0000
// bits 3...0 - FEC
// Check FEC:
// Data:
// bits 15...8 - data byte
// bits 7...4 - FEC
// bits 3...0 - syndrome
}
E-mail: info@telesys.ru