Method waitTxDone

src/platforms/esp/32/drivers/uart/uart_peripheral_esp.cpp.hpp:261–296

}

bool UartPeripheralEsp::waitTxDone(u32 timeout_ms) FL_NOEXCEPT {
    if (!mInitialized) {
        FL_WARN("UartPeripheralEsp: Cannot wait - not initialized");
        return false;
    }

    uart_port_t uart_num = static_cast<uart_port_t>(mConfig.mUartNum);

    // Convert timeout to FreeRTOS ticks
    TickType_t timeout_ticks;
    if (timeout_ms == 0) {
        timeout_ticks = 0;  // Non-blocking poll
    } else {
        timeout_ticks = pdMS_TO_TICKS(timeout_ms);
    }

    // Wait for TX FIFO to empty
    esp_err_t err = uart_wait_tx_done(uart_num, timeout_ticks);

    // If transmission just completed, set reset timer
    if (err == ESP_OK) {
        // Calculate reset duration based on transmission time
        // For UART: transmission_time_us = (byte_count * bits_per_frame * 1000000) / baud_rate
        // Since we don't track byte count here, use a conservative estimate
        // Minimum reset period is 50us (WS2812 requirement)
        // Use a fixed reset period of 1000us (1ms) to ensure complete channel draining
        const u64 MIN_RESET_DURATION_US = 50;
        const u64 DEFAULT_RESET_DURATION_US = 1000;

        const u64 reset_duration = (mConfig.mBaudRate > 0) ? DEFAULT_RESET_DURATION_US : MIN_RESET_DURATION_US;
        mResetExpireTime = fl::micros() + reset_duration;
    }

    // ESP_OK means all done, ESP_ERR_TIMEOUT means still busy (not an error)
    return (err == ESP_OK);
}

bool UartPeripheralEsp::isBusy() const FL_NOEXCEPT {
    if (!mInitialized) {