_/qmk_firmware
1
0
Fork 0
Code Releases Activity

Merge pull request #914 from wez/ble_2

Browse source 
Add arduino-alike GPIO pin control helpers
This commit is contained in:
Jack Humbert 2016-12-02 13:12:56 -05:00 committed by GitHub
commit 8f0a8cb7a6
1 changed files with 37 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

37
quantum/pincontrol.h Normal file
View file

@ -0,0 +1,37 @@
#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);
}