void pack_sub_path( uint8_t *sub_path)
{

	uint8_t *projectKey ,*mac,*cqdianma;
	const char *dianma ="12345123451234512340";
	memset(pubTopName,0,sizeof(pubTopName)); 
	config.read(CFG_MQTT_PROJECT , (void **)&projectKey );
	config.read(CFG_MQTT_MAC , (void **)&mac );
	// config.read(CFG_SYS_CQDM , (void **)&cqdianma );
	printf("readok #####%.20s\n\n",dianma);
	
	這裡寫cqdianma 就會宕機