Improve readability of codes in farm ai demo

Adjust the indentation of codes.

examples/farm_ai_demo/farm_ai_demo.c

@@ -20,11 +20,13 @@ static int str_to_hex(const char *bufin, int len, char *bufout)
 {
     int i = 0;
     unsigned char tmp2 = 0x0;
-    unsigned int tmp = 0;
+    unsigned char tmp  = 0x0;
+	
     if (NULL == bufin || len <= 0 || NULL == bufout)
     {
         return -1;
     }
+	
     for(i = 0; i < len; i = i+2)
     {
         tmp2 =  bufin[i];
@@ -34,6 +36,7 @@ static int str_to_hex(const char *bufin, int len, char *bufout)
         bufout[i/2] =(tmp2<<4)|(tmp&0x0F);
 
     }
+	
     return 0; 
 }
 
@@ -67,6 +70,7 @@ int mq_dev_report(void)
     }
     tos_mmheap_free(data);
     cJSON_Delete(root);
+    
     return 0;	
 }
 
@@ -79,6 +83,7 @@ int parse_dev_cmd(uint8_t *data)
     int motor;
     int light;
     char *str;
+	
     printf("parse_dev_cmd...\n");
     if(cjson == NULL){
         printf("json pack into cjson error...");
@@ -87,6 +92,7 @@ int parse_dev_cmd(uint8_t *data)
     else{
         cJSON_Print(cjson);
     }
+	
     cjsonret = NULL;
     cjsonret = cJSON_GetObjectItem(cjson,"motor");
     if(cjsonret!=NULL)
@@ -95,14 +101,17 @@ int parse_dev_cmd(uint8_t *data)
         motor=cjsonret->valueint;
         printf("motor=%d\n",motor);
         if(motor==1)
-		{//power on relay
+        {   
+            //power on relay
             motor_control(1);
         }	
         else if(motor==0)
-		{//power off relay
+        {
+            //power off relay
             motor_control(0);
         }	
     }
+	
     cjsonret = NULL;
     cjsonret = cJSON_GetObjectItem(cjson,"light");
     if(cjsonret!=NULL)
@@ -112,11 +121,13 @@ int parse_dev_cmd(uint8_t *data)
         //打印输出
         printf("light=%d\n",light);
         if(light==1)
-		{//power on relay
+        {
+            //power on relay
             light_control(1);
         }	
         else if(light==0)
-		{//power off relay
+        {
+            //power off relay
             light_control(0);
         }			
     }
@@ -137,10 +148,12 @@ int parse_dev_cmd(uint8_t *data)
     } 
     //delete cjson
     cJSON_Delete(cjson);
+    
     return 0;	
 }
 
-int mq_dev_receiv(void){
+int mq_dev_receiv(void)
+{
     static int count = 1;
     uint8_t read_data[100];
     int read_len;
@@ -160,12 +173,13 @@ int mq_dev_receiv(void){
         parse_dev_cmd(read_data);
     }
     count++;
+		
     return 0;
 }
 
-int mq_dev_subscribe(void){
+int mq_dev_subscribe(void)
+{
     mqtt_sub_opt_t sub_opt;
-
     sub_opt.count = 1;
     sub_opt.dup = 0;
     sub_opt.id = 1;
@@ -176,6 +190,7 @@ int mq_dev_subscribe(void){
     if (tos_mqtt_subscribe(sock_id, &sub_opt) != 0) {
         printf("subscribe failed!!!\n");
     }
+	
     return 0;
 }
 void ai_demo(void)
@@ -205,15 +220,18 @@ void ai_demo(void)
     }
 }
 
-void sensor_read(void){
+void sensor_read(void)
-    while(1){
+{
+    while(1)
+    {
         E53_IA1_Read_Data();
         osDelay(100);
     }
 }
 
 #define welcomspeak "欢迎TOS"
-void speaker(char *str){
+void speaker(char *str)
+{
     uint8_t data[100];
     int16_t len=0;
 
@@ -244,4 +262,3 @@ void application_entry(void *arg)
         tos_task_delay(1000);
     }
 }
-