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Add null GPIO pin (#6611)

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This commit is contained in:
Clyde Stubbs 2024-04-24 06:49:14 +10:00 committed by GitHub
parent 8027921ba3
commit b8f0182fc5
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GPG Key ID: B5690EEEBB952194
3 changed files with 26 additions and 12 deletions
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4
esphome/components/cst226/touchscreen/cst226_touchscreen.cpp
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@ -5,7 +5,6 @@ namespace cst226 {
void CST226Touchscreen::setup() {
esph_log_config(TAG, "Setting up CST226 Touchscreen...");
if (this->reset_pin_ != nullptr) {
this->reset_pin_->setup();
this->reset_pin_->digital_write(true);
delay(5);
@ -13,9 +12,6 @@ void CST226Touchscreen::setup() {
delay(5);
this->reset_pin_->digital_write(true);
this->set_timeout(30, [this] { this->continue_setup_(); });
} else {
this->continue_setup_();
}
}
void CST226Touchscreen::update_touches() {

2
esphome/components/cst226/touchscreen/cst226_touchscreen.h
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@ -35,7 +35,7 @@ class CST226Touchscreen : public touchscreen::Touchscreen, public i2c::I2CDevice
void continue_setup_();
InternalGPIOPin *interrupt_pin_{};
GPIOPin *reset_pin_{};
GPIOPin *reset_pin_{NULL_PIN};
uint8_t chip_id_{};
bool setup_complete_{};
};

18
esphome/core/gpio.h
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@ -62,6 +62,24 @@ class GPIOPin {
virtual bool is_internal() { return false; }
};
/**
* A pin to replace those that don't exist.
*/
class NullPin : public GPIOPin {
public:
void setup() override {}
void pin_mode(gpio::Flags _) override {}
bool digital_read() override { return false; }
void digital_write(bool _) override {}
std::string dump_summary() const override { return {"Not used"}; }
};
static GPIOPin *const NULL_PIN = new NullPin();
/// Copy of GPIOPin that is safe to use from ISRs (with no virtual functions)
class ISRInternalGPIOPin {
public: