crc->state = reflect(crc->state, crc->order);
}
-void crc_update(crc_t *crc, uint32_t indata, int data_width){
-
- uint32_t poly = crc->polynom;
-
- // if requested, return the initial CRC */
- if (indata == 0)
- return crc->initial_value;
-
- //reflected
+void crc_update(crc_t *crc, uint32_t data, int data_width){
+
if (crc->refin)
- indata = reflect(indata, data_width);
+ data = reflect(data, data_width);
// Bring the next byte into the remainder.
- crc->state ^= indata << (crc->order - data_width);
+ crc->state ^= data << (crc->order - data_width);
for( uint8_t bit = data_width; bit > 0; --bit) {
- // Try to divide the current data bit.
+
if (crc->state & crc->topbit)
- crc->state = (crc->state << 1) ^ poly;
+ crc->state = (crc->state << 1) ^ crc->polynom;
else
crc->state = (crc->state << 1);
}
- return crc ^ model->xorout;
}
void crc_update2(crc_t *crc, uint32_t data, int data_width)