Implemented unit timed tick and uart rx timeout

framework/unit.h

@@ -45,6 +45,9 @@ struct unit {
 
     /** Bit-map of held resources */
     ResourceMap resources;
+
+    uint16_t tick_interval;
+    uint16_t _tick_cnt;
 };
 
 /**
@@ -111,6 +114,13 @@ struct unit_driver {
      * Handle an incoming request. Return true if command was OK.
      */
     error_t (*handleRequest)(Unit *unit, TF_ID frame_id, uint8_t command, PayloadParser *pp);
+
+    /**
+     * Periodic update call.
+     * This is run from the SysTick interrupt handler,
+     * any communication should be deferred via the job queue.
+     */
+    void (*updateTick)(Unit *unit);
 };
 
 /**

framework/unit_registry.c

@@ -583,3 +583,21 @@ void ureg_print_unit_resources(IniWriter *iw)
     }
     iw_newline(iw);
 }
+
+void ureg_tick_units(void)
+{
+    UlistEntry *li = ulist_head;
+    while (li != NULL) {
+        Unit *const pUnit = &li->unit;
+        if (pUnit->status == E_SUCCESS && pUnit->tick_interval > 0) {
+            if (pUnit->_tick_cnt == 0) {
+                if (pUnit->driver->updateTick) {
+                    pUnit->driver->updateTick(pUnit);
+                }
+                pUnit->_tick_cnt = pUnit->tick_interval;
+            }
+            pUnit->_tick_cnt--;
+        }
+        li = li->next;
+    }
+}

framework/unit_registry.h

@@ -142,4 +142,9 @@ Unit *ureg_get_rsc_owner(Resource resource);
  */
 void ureg_print_unit_resources(IniWriter *iw);
 
+/**
+ * 1ms tick for all units that want it
+ */
+void ureg_tick_units(void);
+
 #endif //GEX_UNIT_REGISTRY_H