Add iotd program framework source code

guowenxue

2021-04-20 c7b6f4f68a6c9e8e83849601bd0f5240c47c317f

 mqttd/hal/beep.c

@@ -27,6 +27,7 @@
#include <errno.h>

#include <wiringPi.h>
#include "lylib/logger.h"
#include "beep.h"

/*+-----------------------------+
@@ -47,7 +48,7 @@

      if(freq<2000 || freq>5000)
        {
            printf("Beep set invalid PWM frequency[%d]!\n", freq);
            log_err("Beep set invalid PWM frequency[%d]!\n", freq);
            return -1;
        }