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1. 浣跨敤寰幆璇诲彇锛氬湪璇诲彇涓插彛鏁版嵁鏃讹紝鍙互浣跨敤寰幆鏉ヤ笉鏂鍙栨暟鎹紝鐩村埌杈惧埌棰勬湡鐨勮鍙栭暱搴︽垨鑰呰揪鍒颁竴瀹氱殑瓒呮椂鏃堕棿銆?/li>

QByteArray data;
int expectedLength = 10; // 鏈熸湜鐨勮鍙栭暱搴?/span>
int timeout = 1000; // 瓒呮椂鏃堕棿锛堝崟浣嶏細姣锛?/span>
QElapsedTimer timer;
timer.start();
while (data.length() < expectedLength && timer.elapsed() < timeout) {
if (serialPort->bytesAvailable() > 0) {
data.append(serialPort->readAll());
}
QThread::msleep(10); // 绛夊緟涓€娈垫椂闂村啀缁х画璇诲彇鏁版嵁
}

2. 璁剧疆瀹氭椂鍣細浣跨敤Qt鐨勫畾鏃跺櫒鏉ュ畾鏃惰鍙栨暟鎹紝鍙互鍦ㄤ竴瀹氱殑鏃堕棿闂撮殧鍐呭弽澶嶈鍙栨暟鎹紝鐩村埌杈惧埌棰勬湡鐨勮鍙栭暱搴︺€?/li>

QTimer *timer = new QTimer(this);
int expectedLength = 10; // 鏈熸湜鐨勮鍙栭暱搴?/span>
connect(timer, &QTimer::timeout, this, [this, expectedLength]() {
QByteArray data = serialPort->readAll();
if (data.length() >= expectedLength) {
// 璇诲彇鍒颁簡瓒冲鐨勬暟鎹紝杩涜鍚庣画澶勭悊
// ...
timer->stop();
}
});
timer->start(100); // 璁剧疆瀹氭椂鍣ㄧ殑鏃堕棿闂撮殧涓?00姣

3. 璁剧疆璇诲彇缂撳啿鍖哄ぇ灏忥細鍙互灏濊瘯澧炲ぇ涓插彛鐨勮鍙栫紦鍐插尯澶у皬锛岄€氳繃璁剧疆QSerialPort::setReadBufferSize()鍑芥暟鏉ュ疄鐜般€?/li>

serialPort->setReadBufferSize(1024); // 璁剧疆璇诲彇缂撳啿鍖哄ぇ灏忎负1024瀛楄妭

4. 鏁版嵁甯у鐞嗭細濡傛灉涓插彛鐨勬暟鎹槸鎸夌収鍥哄畾鐨勬牸寮忚繘琛屼紶杈撶殑锛屽彲浠ユ牴鎹暟鎹抚鐨勭壒寰佽繘琛屽鐞嗐€備緥濡傦紝濡傛灉姣忎釜鏁版嵁甯х殑寮€濮嬪拰缁撴潫閮芥湁鐗瑰畾鐨勬爣蹇楃鍙凤紝鍙互鏍规嵁鏍囧織绗﹀彿鏉ュ垽鏂暟鎹抚鐨勫紑濮嬪拰缁撴潫锛屽苟杩涜鐩稿簲鐨勫鐞嗐€?/li>

甯屾湜浠ヤ笂鏂规硶鑳藉甯姪鍒版偍瑙ｅ喅闂銆?/p>