Function testRxChannelSanity

examples/RX/test.cpp:160–241

}

bool testRxChannelSanity(fl::shared_ptr<fl::RxChannel> rx, int pin_tx) {
    FL_WARN("Testing RX channel with low-frequency pattern...");

    if (!rx) {
        FL_ERROR("Failed to test RX channel - null channel provided");
        return false;
    }

    int pin_rx = rx->getPin();

    // Configure RX channel for low-frequency test
    fl::RxChannelConfig config(pin_rx);
    config.signal_range_min_ns = 100;       // 100ns glitch filter
    config.signal_range_max_ns = 30000000;  // 30ms idle timeout (ESP-IDF RMT limit: 32767000ns)
    config.start_low = true;                 // Pin starts LOW

    // Initialize TX pin and set to LOW
    pinMode(pin_tx, OUTPUT);
    pinMode(pin_rx, INPUT);
    digitalWrite(pin_tx, LOW);
    delay(10);  // Allow pin to settle

    if (!rx->begin(config)) {
        FL_ERROR("Failed to initialize RX channel");
        return false;
    }

    // Generate simple test pattern: 4 edges (LOW->HIGH->LOW->HIGH)
    // Pattern: HIGH 10ms, LOW 10ms, HIGH 10ms
    FL_WARN("Generating test pattern on GPIO " << pin_tx << "...");
    digitalWrite(pin_tx, HIGH);
    delay(10);
    digitalWrite(pin_tx, LOW);
    delay(10);
    digitalWrite(pin_tx, HIGH);
    delay(10);
    digitalWrite(pin_tx, LOW);

    // Wait for capture with timeout
    FL_WARN("Waiting for RX capture...");
    auto wait_result = rx->wait(100);

    if (wait_result == fl::RxWaitResult::TIMEOUT) {
        FL_ERROR("RX channel test FAILED - timeout waiting for data");
        FL_ERROR("  No edges captured within 100ms");
        FL_ERROR("  This suggests the RX channel cannot read from GPIO " << pin_rx);
        return false;
    }

    // Get captured edges
    fl::array<fl::EdgeTime, 10> edge_buffer;
    size_t edge_count = rx->getRawEdgeTimes(edge_buffer);

    if (edge_count < 3) {
        FL_ERROR("RX channel test FAILED - insufficient edges captured");
        FL_ERROR("  Expected at least 3 edges, got " << edge_count);
        FL_ERROR("  Pin loopback may not be working correctly");
        return false;