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-rw-r--r--quantum/pincontrol.h37
1 files changed, 37 insertions, 0 deletions
diff --git a/quantum/pincontrol.h b/quantum/pincontrol.h
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index 0000000000..36ce29ef22
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+++ b/quantum/pincontrol.h
@@ -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);
+}