arusr:
I'm trying to convert a ascii representation of a mac address like 1122334455667788 to eight bytes of hex that represents the same mac address.
char text[] = "1122334455667788";
char hex[8];
void foo() {
for (int i = 0; i < 8; i++) {
hex[i] = (toHex(text[i * 2]) << 8) | toHex(text[i * 2 + 1]);
}
}
inline byte toHex(char z) {
return z <= '9' ? z - '0' : z <= 'F' ? z - 'A' + 10 : z - 'a' + 10;
}