Converting To and From Gray Code
The following functions in C convert between binary numbers and their associated Gray codes.
/* The purpose of this function is to convert an unsigned binary number to reflected binary Gray code. The operator >> is shift right. The operator ^ is exclusive or. */ unsigned int binaryToGray(unsigned int num) { return (num >> 1) ^ num; } /* The purpose of this function is to convert a reflected binary Gray code number to a binary number. */ unsigned int grayToBinary(unsigned int num) { unsigned int numBits = 8 * sizeof(num); unsigned int shift; for (shift = 1; shift < numBits; shift = 2 * shift) { num = num ^ (num >> shift); } return num; }Read more about this topic: Gray Code
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