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[pcf8574][pca9554] Disable loop when all pins are outputs (#15455)

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This commit is contained in:
J. Nick Koston
2026-04-04 22:52:40 -10:00
committed by GitHub
parent 4d2062282e
commit 9ea27e68ee
2 changed files with 18 additions and 4 deletions
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11
esphome/components/pca9554/pca9554.cpp
View File

@@ -40,9 +40,11 @@ void PCA9554Component::setup() {
this->interrupt_pin_->attach_interrupt(&PCA9554Component::gpio_intr, this, gpio::INTERRUPT_FALLING_EDGE);
// Don't invalidate cache on read — only invalidate when interrupt fires
this->set_invalidate_on_read_(false);
// With interrupt pin, only run loop when interrupt fires
this->disable_loop();
}
// Disable loop until an input pin is configured via pin_mode()
// For interrupt-driven mode, loop is re-enabled by the ISR
// For polling mode, loop is re-enabled when pin_mode() registers an input pin
this->disable_loop();
}
void IRAM_ATTR PCA9554Component::gpio_intr(PCA9554Component *arg) { arg->enable_loop_soon_any_context(); }
void PCA9554Component::loop() {
@@ -89,6 +91,11 @@ void PCA9554Component::pin_mode(uint8_t pin, gpio::Flags flags) {
if (flags == gpio::FLAG_INPUT) {
// Clear mode mask bit
this->config_mask_ &= ~(1 << pin);
// Enable polling loop for input pins (not needed for interrupt-driven mode
// where the ISR handles re-enabling loop)
if (this->interrupt_pin_ == nullptr) {
this->enable_loop();
}
} else if (flags == gpio::FLAG_OUTPUT) {
// Set mode mask bit
this->config_mask_ |= 1 << pin;

11
esphome/components/pcf8574/pcf8574.cpp
View File

@@ -21,9 +21,11 @@ void PCF8574Component::setup() {
this->interrupt_pin_->attach_interrupt(&PCF8574Component::gpio_intr, this, gpio::INTERRUPT_FALLING_EDGE);
// Don't invalidate cache on read — only invalidate when interrupt fires
this->set_invalidate_on_read_(false);
// With interrupt pin, only run loop when interrupt fires
this->disable_loop();
}
// Disable loop until an input pin is configured via pin_mode()
// For interrupt-driven mode, loop is re-enabled by the ISR
// For polling mode, loop is re-enabled when pin_mode() registers an input pin
this->disable_loop();
}
void IRAM_ATTR PCF8574Component::gpio_intr(PCF8574Component *arg) { arg->enable_loop_soon_any_context(); }
void PCF8574Component::loop() {
@@ -66,6 +68,11 @@ void PCF8574Component::pin_mode(uint8_t pin, gpio::Flags flags) {
this->mode_mask_ &= ~(1 << pin);
// Write GPIO to enable input mode
this->write_gpio_();
// Enable polling loop for input pins (not needed for interrupt-driven mode
// where the ISR handles re-enabling loop)
if (this->interrupt_pin_ == nullptr) {
this->enable_loop();
}
} else if (flags == gpio::FLAG_OUTPUT) {
// Set mode mask bit
this->mode_mask_ |= 1 << pin;