demos/high_res: Add HMI evCharge data publish through MQTT

Create a shared variable to share current progress of EV charging.
After each poll for ADC data, also publish the progress percentage
on relevant topic via MQTT.

Signed-off-by: Divyansh Mittal <d-mittal@ti.com>

Author: d-mittal-ti

demos/high_res/adc.c

@@ -41,6 +41,7 @@ static lv_demo_high_res_api_t * api_hmi;
 static struct mosquitto *mosq;
 extern int back_pressed_adc;
 void publish_sensor_data(float);
+extern int ev_charge;
 
 /**
  * enum autochan - state for the automatic channel enabling mechanism
@@ -102,7 +103,13 @@ void publish_sensor_data(float temp)
     rc = mosquitto_publish(mosq, NULL, "SmartHome/temp", strlen(payload), payload, 1, false);
     if(rc != MOSQ_ERR_SUCCESS){                                        
 		fprintf(stderr, "Error publishing: %s\n", mosquitto_strerror(rc));
-    }                              
+    }
+
+	snprintf(payload, sizeof(payload), "%d", ev_charge);
+	rc = mosquitto_publish(mosq, NULL, "SmartHome/evCharge", strlen(payload), payload, 1, false);
+    if(rc != MOSQ_ERR_SUCCESS){                                        
+		fprintf(stderr, "Error publishing: %s\n", mosquitto_strerror(rc));
+    }                                    
 }
 
 int mqtt_temp_pub_init(){

demos/high_res/lv_demo_high_res_app_ev_charging.c

@@ -20,6 +20,11 @@
  *      DEFINES
  *********************/
 
+/*********************
+ *  GLOBAL VARIABLE
+ *********************/
+int ev_charge = 0;
+
 /**********************
  *      TYPEDEFS
  **********************/
@@ -210,6 +215,7 @@ static void anim_exec_cb(void * var, int32_t v)
     lv_demo_high_res_ctx_t * c = lv_obj_get_user_data(base_obj);
 
     lv_subject_set_int(&c->ev_charging_progress, v);
+    ev_charge = lv_map(lv_subject_get_int(&c->ev_charging_progress), 0, EV_CHARGING_RANGE_END, 0, 100);
 
     if(c->ev_charging_bg_cont) {
         anim_state_t * anim_state = lv_obj_get_user_data(c->ev_charging_bg_cont);