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[uart] Order members largest to smallest to reduce padding

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J. Nick Koston
2026-08-16 19:30:59 -05:00
parent 752f36458b
commit 11b37e1861
1 changed files with 4 additions and 3 deletions
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esphome/components/uart/uart_component_esp_idf.h
+4 -3
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@@ -54,9 +54,12 @@ class IDFUARTComponent final : public UARTComponent, public Component {
protected:
void check_logger_conflict() override;
uart_port_t uart_num_;
uart_config_t get_config_();
// Members ordered largest to smallest to minimize padding
uart_port_t uart_num_;
uint32_t flush_timeout_ms_{0}; ///< 0 means wait indefinitely (portMAX_DELAY).
uint8_t peek_byte_;
bool has_peek_{false};
/// True once uart_driver_install() succeeded for uart_num_. Gates all
/// driver-touching I/O: before setup uart_num_ is not even assigned, so
@@ -66,8 +69,6 @@ class IDFUARTComponent final : public UARTComponent, public Component {
/// I/O like it always did, and load_settings() can revive it.
bool driver_installed_{false};
bool warned_not_ready_{false};
uint8_t peek_byte_;
uint32_t flush_timeout_ms_{0}; ///< 0 means wait indefinitely (portMAX_DELAY).
#ifdef USE_UART_WAKE_LOOP_ON_RX
// ISR callback for UART RX data notification — wakes the main loop directly.