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Added a function to allow inverting the output from a GPIO pin #3039

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Added a function to allow inverting the output from a GPIO pin #3039

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2 changes: 2 additions & 0 deletions cores/rp2040/api/Common.h
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Original file line number Diff line number Diff line change
@@ -1,2 +1,4 @@
#pragma once
#include "../../../ArduinoCore-API/api/Common.h"

void setPinInvert(pin_size_t ulPin, bool invert);
17 changes: 15 additions & 2 deletions cores/rp2040/wiring_digital.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -25,13 +25,27 @@ extern void __clearADCPin(pin_size_t p);

static PinMode _pm[__GPIOCNT];

extern "C" void setPinInvert(pin_size_t ulPin, bool invert) __attribute__((weak, alias("__setPinInvert")));
extern "C" void __setPinInvert(pin_size_t ulPin, bool invert) {
if (ulPin >= __GPIOCNT) {
DEBUGCORE("ERROR: Illegal pin in setPinInvert (%d)\n", ulPin);
return;
}

if (invert)
gpio_set_outover(ulPin, GPIO_OVERRIDE_INVERT);
else
gpio_set_outover(ulPin, GPIO_OVERRIDE_NORMAL);
}

extern "C" void pinMode(pin_size_t ulPin, PinMode ulMode) __attribute__((weak, alias("__pinMode")));
extern "C" void __pinMode(pin_size_t ulPin, PinMode ulMode) {
if (ulPin >= __GPIOCNT) {
DEBUGCORE("ERROR: Illegal pin in pinMode (%d)\n", ulPin);
return;
}


gpio_set_function(ulPin, GPIO_FUNC_SIO);
switch (ulMode) {
case INPUT:
gpio_init(ulPin);
Expand Down Expand Up @@ -90,7 +104,6 @@ extern "C" void __digitalWrite(pin_size_t ulPin, PinStatus ulVal) {
DEBUGCORE("ERROR: Illegal pin in pinMode (%d)\n", ulPin);
return;
}
gpio_set_function(ulPin, GPIO_FUNC_SIO);
if (_pm[ulPin] == INPUT_PULLDOWN) {
if (ulVal == LOW) {
gpio_set_dir(ulPin, false);
Expand Down