2 // Some helpers for controlling gpio pins
7 PinDirectionOutput = 1,
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;
18 _SFR_IO8((pin >> 4) + 1) &= ~bv;
19 _SFR_IO8((pin >> 4) + 2) &= ~bv;
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;
29 _SFR_IO8((pin >> 4) + 2) &= ~bv;
33 // Return true if the pin is HIGH
35 static inline bool digitalRead(uint8_t pin) {
36 return _SFR_IO8(pin >> 4) & _BV(pin & 0xf);