Diff: ACA.cpp

Revision:

21:c19355cc5e79

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ACA.cpp	Tue Mar 06 21:34:31 2018 +0000
@@ -0,0 +1,42 @@
+//
+// This module implements ACA Charge mode for USB connected phones to external charge source.
+// A state-machine is required that runs when phone is attached/detached 
+//
+
+#include "ACA.h"
+
+// ACA Charger state machine
+#define IDLE_STATE      0
+#define WAIT_STATE      1
+
+static  int state=WAIT_STATE;
+static  int delay = 0;
+
+// Runs every 20ms for now
+// For now we just set the ID resistors to there default settings
+void ACAChargerTask()
+{
+    switch(state)
+    {
+        case WAIT_STATE:
+            disableVBUS = 1;    // disable VBUS
+            ID_SW = 1;          // Enable 124k ID res
+            ID_SW1 = 0; 
+            delay++;
+            if(delay==20) {     // delay 400ms
+                state = IDLE_STATE;
+                delay=0;
+            }
+        break;
+        
+        case IDLE_STATE:
+             disableVBUS = 0;   //Enable VBUS, stay in this state till next power cycle
+        break;
+        
+        
+        default:
+        break;
+        
+    }
+}
+