广播命令已接收的回复不再触发回调

检测命令0x0c只能使用单播方式，广播方式因为不能即时回复停止信号，回复会出错
  添加电阻测试命令，添加自检命令

base/beep.cpp

@@ -0,0 +1,131 @@
+#include "beep.h"
+#include "QTimer"
+#include "QThread"
+beep::beep(QObject *parent) : QObject(parent)
+{
+  /* 开发板的 LED 控制接口 */
+  file.setFileName("/sys/devices/platform/leds/leds/beep/brightness");
+  if (!file.exists())
+  {
+    qWarning()<<"beep init Fail!!"<<endl;
+    return ;
+  }
+  
+  set_state(false);
+  state = get_state();
+  
+  // 在启动此对象时自动鸣叫两次
+  delay_on_ms = 100;
+  delay_off_ms =100;
+  ticks = 2;
+  is_run = true;
+}
+
+
+
+bool beep::get_state()
+{
+    if(!file.exists())
+        return  false;
+    if(!file.open(QIODevice::ReadWrite))
+        qWarning()<<file.errorString();
+    QTextStream in(&file);
+
+    QString buf = in.readLine();
+
+    file.close();
+    if(buf == "1")
+    {
+        state = true;
+    }
+    else
+    {
+        state = false;
+    }
+    return false;
+}
+
+
+// 控制蜂鸣器，用户程序一般不直接调用
+bool beep::set_state(bool state)
+{
+    if (!file.exists())
+        return false;
+    if(!file.open(QIODevice::ReadWrite))
+        qWarning()<<file.errorString();
+    if(state)
+    {
+        file.write("1");
+        this->state = true;
+    }
+    else
+    {
+        file.write("0");
+        this->state = false;
+    }
+    file.close();
+
+    return true;
+}
+
+
+void beep::start()
+{
+    QTimer::singleShot(0,this, &beep::run_cb);
+}
+
+
+bool beep::stop()
+{
+    QMutexLocker locker(&lock);
+    is_run = false;
+    return true;
+}
+
+
+// 用户程序调用这个函数开启蜂鸣器
+void beep::set_beep(int delay_on_ms,int delay_off_ms,int ticks)
+{
+
+    this->delay_on_ms = delay_on_ms;
+    this->delay_off_ms =delay_off_ms;
+    this->ticks = ticks;
+}
+
+
+// 执行线程
+void beep::run_cb()
+{
+    while(is_run)
+    {
+        QMutexLocker locker(&lock);
+        while(ticks>0)
+        {
+            ticks--;
+            set_state(true);
+            QThread::msleep(delay_on_ms);
+            set_state(false);
+            QThread::msleep(delay_off_ms);
+        }
+
+    }
+}
+
+
+
+beep *Beep(){
+  static beep *b=nullptr;
+  static QThread thread;
+  if(b==nullptr){
+    b=new beep();
+    b->moveToThread(&thread);
+    thread.start();
+    b->start();
+  }
+  return b;
+}
+
+
+
+
+

base/beep.h

@@ -0,0 +1,45 @@
+#ifndef BEEP_H
+#define BEEP_H
+
+#include <QFile>
+#include <QDebug>
+#include <QObject>
+#include <QThread>
+#include <QMutexLocker>
+#include <QMutex>
+class beep : public QObject
+{
+  Q_OBJECT
+public:
+  explicit beep(QObject *parent = nullptr);
+  
+    bool stop();
+    void start();
+    // 用户程序调用这个函数开启蜂鸣器
+    void set_beep(int delay_on_ms,int delay_off_ms,int ticks);
+private:
+    bool get_state();
+    bool set_state(bool state);
+private:
+    bool is_run;
+    bool state;
+
+    int delay_on_ms;
+    int delay_off_ms;
+    int ticks;
+
+    QMutex lock;
+    QFile file;
+
+private slots:
+    void run_cb();
+  
+};
+
+
+
+beep *Beep();
+
+
+
+#endif // BEEP_H