Lines Matching refs:csum
537 int csum;
541 csum = 0;
552 csum += c;
557 csum &= 0xff;
559 // Bring in the checksum. If the check sum matches, csum will be 0.
560 csum -= digit2i(getbyte()) * 16;
561 csum -= digit2i(getbyte());
564 if (csum == 0) {
589 uint8_t csum, c;
598 for (csum = 0; (c = *p); p++) {
600 csum += c;
605 putbyte(i2digit(csum >> 4));
606 putbyte(i2digit(csum));