38 lines
859 B
C
38 lines
859 B
C
|
#pragma once
|
||
|
|
// Some helpers for controlling gpio pins
|
||
|
|
#include <avr/io.h>
|
||
|
|
|
||
|
|
enum {
|
||
|
|
PinDirectionInput = 0,
|
||
|
|
PinDirectionOutput = 1,
|
||
|
|
PinLevelHigh = 1,
|
||
|
|
PinLevelLow = 0,
|
||
|
|
};
|
||
|
|
|
||
|
|
// ex: pinMode(B0, PinDirectionOutput);
|
||
|
|
static inline void pinMode(uint8_t pin, int mode) {
|
||
|
|
uint8_t bv = _BV(pin & 0xf);
|
||
|
|
if (mode == PinDirectionOutput) {
|
||
|
|
_SFR_IO8((pin >> 4) + 1) |= bv;
|
||
|
|
} else {
|
||
|
|
_SFR_IO8((pin >> 4) + 1) &= ~bv;
|
||
|
|
_SFR_IO8((pin >> 4) + 2) &= ~bv;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// ex: digitalWrite(B0, PinLevelHigh);
|
||
|
|
static inline void digitalWrite(uint8_t pin, int mode) {
|
||
|
|
uint8_t bv = _BV(pin & 0xf);
|
||
|
|
if (mode == PinLevelHigh) {
|
||
|
|
_SFR_IO8((pin >> 4) + 2) |= bv;
|
||
|
|
} else {
|
||
|
|
_SFR_IO8((pin >> 4) + 2) &= ~bv;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return true if the pin is HIGH
|
||
|
|
// digitalRead(B0)
|
||
|
|
static inline bool digitalRead(uint8_t pin) {
|
||
|
|
return _SFR_IO8(pin >> 4) & _BV(pin & 0xf);
|
||
|
|
}
|