diff --git a/Lib/GPIO.C b/Lib/GPIO.C
index 1642a28..465c1ff 100644
--- a/Lib/GPIO.C
+++ b/Lib/GPIO.C
@@ -91,29 +91,102 @@ void EC_Cfg()
   // INT off
   EX0 = 0;
   EX1 = 0;
-  // Init gpios
+  //  Init gpios
   Port3Cfg(0, 4); // P3.4 EC_KEY
   Port3Cfg(0, 2); // P3.2 EC_A
   Port3Cfg(0, 3); // P3.3 EC_B
   // Init ints
   IT0 = 1; // FALLEDGE trig
   IT1 = 1;
-  // INT on
+  //  INT on
   EX0 = 1;
   EX1 = 1;
 }
 
+volatile short data ec_count = 0;
+volatile bit data ec_rotating = 0;
+
 void EC_IntA(void) interrupt INT_NO_INT0 using 2 // INT0中断服务程序,使用寄存器组2
 {
-  ;
+  if (ec_rotating)
+  {
+    // A相后动
+    if (EC_B == 1)
+    {
+      // 不合理的，丢步了
+      // LEDA = 1;
+      // LEDB = 1;
+    }
+    else
+    {
+      // 方向1转完了
+      ec_count++;
+      // LEDA = 1;
+    }
+    ec_rotating = 0;
+  }
+  else
+  {
+    // A相先动
+    if (EC_B == 1)
+    {
+      // 方向1起转
+      ec_rotating = 1;
+      // LEDA = 0;
+    }
+    else
+    {
+      // 不合理的，丢步了
+      ec_rotating = 0;
+      // LEDA = 1;
+      // LEDB = 1;
+    }
+  }
 }
 
-void EC_IntB(void) interrupt INT_NO_INT1 using 2 // INT0中断服务程序,使用寄存器组2
+void EC_IntB(void) interrupt INT_NO_INT1 using 3 // INT1中断服务程序,使用寄存器组2
 {
-  ;
+  if (ec_rotating)
+  {
+    // B相后动
+    if (EC_A == 1)
+    {
+      // 不合理的，丢步了
+      // LEDA = 1;
+      // LEDB = 1;
+    }
+    else
+    {
+      // 方向2转完了
+      ec_count--;
+      // LEDB = 1;
+    }
+    ec_rotating = 0;
+  }
+  else
+  {
+    // B相先动
+    if (EC_A == 1)
+    {
+      // 方向2起转
+      ec_rotating = 1;
+      // LEDB = 0;
+    }
+    else
+    {
+      // 不合理的，丢步了
+      ec_rotating = 0;
+      // LEDA = 1;
+      // LEDB = 1;
+    }
+  }
 }
 
 short EC_Read()
 {
-  return 0;
+
+  short cnt = ec_count;
+  // if (!ec_rotating)
+  ec_count = 0;
+  return cnt;
 }
\ No newline at end of file
diff --git a/Lib/GPIO.H b/Lib/GPIO.H
index 949c754..aae18eb 100644
--- a/Lib/GPIO.H
+++ b/Lib/GPIO.H
@@ -15,5 +15,12 @@
 void Port1Cfg(UINT8 Mode, UINT8 Pin);
 void Port3Cfg(UINT8 Mode, UINT8 Pin);
 
+sbit EC_A = P3 ^ 2;
+sbit EC_B = P3 ^ 3;
+sbit EC_KEY = P3 ^ 4;
+
+sbit LEDA = P1 ^ 4;
+sbit LEDB = P1 ^ 5;
+
 void EC_Cfg();
 short EC_Read();
\ No newline at end of file
diff --git a/SnapDial.C b/SnapDial.C
index 0d7181b..3813296 100644
--- a/SnapDial.C
+++ b/SnapDial.C
@@ -4,10 +4,6 @@
 #include <string.h>
 #include <stdio.h>
 
-sbit EC_A = P3 ^ 2;
-sbit EC_B = P3 ^ 3;
-sbit EC_KEY = P3 ^ 4;
-
 #define THIS_ENDP0_SIZE DEFAULT_ENDP0_SIZE
 #define ENDP1_IN_SIZE 16
 
@@ -455,6 +451,10 @@ main()
     CfgFsys();
     mDelaymS(5); // 修改主频等待内部晶振稳定,必加
 
+    Port1Cfg(3, 4);
+    Port1Cfg(3, 5);
+    LEDA = 1;
+    LEDB = 1;
     EC_Cfg();
 
     // USBDeviceReset();
@@ -469,7 +469,7 @@ main()
         {
             FLAG_EP1 = 0;
             HIDDial[1] = (EC_KEY) ? 0x00 : 0x01;
-            DialRotation = EC_Read();
+            DialRotation = EC_Read()*50;
             HIDDial[2] = DialRotation & 0x00ff;
             HIDDial[3] = ((DialRotation & 0xff00) >> 8);
             Enp1IntIn();