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FIX: forgot I removed some other stuff

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iceman1001 2016-09-29 12:29:42 +02:00
parent f2ba788536
commit b7e8338d2b
1 changed files with 6 additions and 14 deletions
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20
common/crc.c
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@ -35,29 +35,21 @@ void crc_clear(crc_t *crc) {
crc->state = reflect(crc->state, crc->order); crc->state = reflect(crc->state, crc->order);
} }
void crc_update(crc_t *crc, uint32_t indata, int data_width){ void crc_update(crc_t *crc, uint32_t data, int data_width){
uint32_t poly = crc->polynom;
// if requested, return the initial CRC */
if (indata == 0)
return crc->initial_value;
//reflected
if (crc->refin) if (crc->refin)
indata = reflect(indata, data_width); data = reflect(data, data_width);
// Bring the next byte into the remainder. // 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) { for( uint8_t bit = data_width; bit > 0; --bit) {
// Try to divide the current data bit.
if (crc->state & crc->topbit) if (crc->state & crc->topbit)
crc->state = (crc->state << 1) ^ poly; crc->state = (crc->state << 1) ^ crc->polynom;
else else
crc->state = (crc->state << 1); crc->state = (crc->state << 1);
} }
return crc ^ model->xorout;
} }
void crc_update2(crc_t *crc, uint32_t data, int data_width) void crc_update2(crc_t *crc, uint32_t data, int data_width)