quantum/pincontrol.h

   1 #pragma once
   2 // Some helpers for controlling gpio pins
   3 #include <avr/io.h>
   4
   5 enum {
   6   PinDirectionInput = 0,
   7   PinDirectionOutput = 1,
   8   PinLevelHigh = 1,
   9   PinLevelLow = 0,
  10 };
  11
  12 // ex: pinMode(B0, PinDirectionOutput);
  13 static inline void pinMode(uint8_t pin, int mode) {
  14   uint8_t bv = _BV(pin & 0xf);
  15   if (mode == PinDirectionOutput) {
  16     _SFR_IO8((pin >> 4) + 1) |= bv;
  17   } else {
  18     _SFR_IO8((pin >> 4) + 1) &= ~bv;
  19     _SFR_IO8((pin >> 4) + 2) &= ~bv;
  20   }
  21 }
  22
  23 // ex: digitalWrite(B0, PinLevelHigh);
  24 static inline void digitalWrite(uint8_t pin, int mode) {
  25   uint8_t bv = _BV(pin & 0xf);
  26   if (mode == PinLevelHigh) {
  27     _SFR_IO8((pin >> 4) + 2) |= bv;
  28   } else {
  29     _SFR_IO8((pin >> 4) + 2) &= ~bv;
  30   }
  31 }
  32
  33 // Return true if the pin is HIGH
  34 // digitalRead(B0)
  35 static inline bool digitalRead(uint8_t pin) {
  36   return _SFR_IO8(pin >> 4) & _BV(pin & 0xf);
  37 }