Keyboard firmwares for Atmel AVR and Cortex-M
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- #include "util.h"
-
- int bitpop(uint8_t bits)
- {
- int c;
- for (c = 0; bits; c++)
- bits &= bits -1;
- return c;
- }
-
- int biton(uint8_t bits)
- {
- int n = 0;
- if (bits >> 4) { bits >>= 4; n += 4;}
- if (bits >> 2) { bits >>= 2; n += 2;}
- if (bits >> 1) { bits >>= 1; n += 1;}
- return n;
- }
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