diff --git a/src/hmi.cpp b/src/hmi.cpp
index 5288bce..fa82971 100644
--- a/src/hmi.cpp
+++ b/src/hmi.cpp
@@ -10,13 +10,71 @@
 #include <stdint.h>
 
 #include "hmi.h"
+#include "pwm.h"
 
 
+class SwitchPort2 {
+public:
+  SwitchPort2(uint16_t bit) : m_bit(bit), m_state(0), m_cnt(0) {
+    P2REN |= m_bit;
+  };
+  bool get() {
+    bool result = false;
+    switch (m_state) {
+    case 0:
+      if (P2IN & m_bit) {
+        m_cnt++;
+      } else {
+        m_cnt = 0;
+      }
+      if (m_cnt > 100) {
+        m_state = 1;
+        m_cnt = 0;
+      }
+      break;
+    case 1:
+      result = true;
+      m_state = 2;
+      break;
+    case 2:
+      if (P2IN & m_bit) {
+        m_cnt = 0;
+      } else {
+        m_cnt++;
+      }
+      if (m_cnt > 20) {
+        m_state = 0;
+        m_cnt = 0;
+      }
+      break;
+    default:
+      m_state = 0;
+      break;  
+    }
+    return result;
+  };
+private:
+  uint16_t m_bit;
+  uint8_t m_state;
+  uint16_t m_cnt;
+};
+
+
+SwitchPort2 switch1 = SwitchPort2(BIT0);
+SwitchPort2 switch2 = SwitchPort2(BIT1);
+SwitchPort2 switch3 = SwitchPort2(BIT2);
 
 void hmiInit() {
-
 }
 
 void hmiExec() {
-
+  if (switch1.get()) {
+    setUDes(0)
+  }
+  if (switch2.get()) {
+    setUDes(getUDes() - 1.0);
+  }
+  if (switch3.get()) {
+    setUDes(getUDes() + 1.0);
+  }
 }
diff --git a/src/pwm.h b/src/pwm.h
index ff2962c..a88b12a 100644
--- a/src/pwm.h
+++ b/src/pwm.h
@@ -1,12 +1,5 @@
-/*
- * time.h
- *
- *  Created on: 20.05.2014
- *      Author: wn
- */
-
-#ifndef TIME_H_
-#define TIME_H_
+#ifndef PWM_H_
+#define PWM_H_
 
 
 
@@ -16,8 +9,12 @@ const uint16_t CYCLE_DELAY = 1;
 
 
 void pwmInit();
+float getDutyCycle();
+float getUCur();
+float getUDes();
+void setUDes(float uDes);
 
 
 
 
-#endif /* TIME_H_ */
+#endif /* PWM_H_ */