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add bitswap option for lf em 4x05write (#236)

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default read mode of this chip outputs in reverse order...  so offer the
option to program in reverse order
This commit is contained in:
marshmellow42 2017-03-21 03:26:26 -04:00 • committed by pwpiwi
commit 2d42ea1e4d
3 changed files with 30 additions and 14 deletions
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9
client/util.c
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@ -257,6 +257,15 @@ void num_to_bytebitsLSBF(uint64_t n, size_t len, uint8_t *dest) {
}
}
// Swap bit order on a uint32_t value. Can be limited by nrbits just use say 8bits reversal
// And clears the rest of the bits.
uint32_t SwapBits(uint32_t value, int nrbits) {
uint32_t newvalue = 0;
for(int i = 0; i < nrbits; i++) {
newvalue ^= ((value >> i) & 1) << (nrbits - 1 - i);
}
return newvalue;
}
// aa,bb,cc,dd,ee,ff,gg,hh, ii,jj,kk,ll,mm,nn,oo,pp
// to