diff --git a/avr/usbload/Makefile b/avr/usbload/Makefile
index c83e5d4..9ca26ea 100644
--- a/avr/usbload/Makefile
+++ b/avr/usbload/Makefile
@@ -8,7 +8,7 @@ AVRDUDE = avrdude -c usbasp -p $(DEVICE)
 
 CFLAGS  = -Iusbdrv -I. -DDEBUG_LEVEL=0 
 #-std=gnu99
-OBJECTS = usbdrv/usbdrv.o usbdrv/usbdrvasm.o usbdrv/oddebug.o main.o uart.o fifo.o sram.o crc.o debug.o
+OBJECTS = usbdrv/usbdrv.o usbdrv/usbdrvasm.o usbdrv/oddebug.o main.o usb_bulk.o uart.o fifo.o sram.o crc.o debug.o
 COMPILE = avr-gcc -Wall -Os -DF_CPU=$(F_CPU) $(CFLAGS) -mmcu=$(DEVICE)
 
 
diff --git a/avr/usbload/main.c b/avr/usbload/main.c
index 6834d87..08fad7e 100644
--- a/avr/usbload/main.c
+++ b/avr/usbload/main.c
@@ -14,7 +14,7 @@
 #include "sram.h"
 #include "debug.h"
 #include "crc.h"
-
+#include "usb_bulk.h"
 
 extern FILE uart_stdout;
 
@@ -32,8 +32,6 @@ uint8_t data_buffer[4];
 uint32_t addr;
 uint16_t crc = 0;
 
-
-
 usbMsgLen_t usbFunctionSetup(uchar data[8])
 {
 
@@ -117,44 +115,6 @@ usbMsgLen_t usbFunctionSetup(uchar data[8])
 }
 
 
-uint8_t usbFunctionWrite(uint8_t * data, uint8_t len)
-{
-    if (len > rx_remaining) {
-        printf("usbFunctionWrite more data than expected remain: %i len: %i\n",
-               rx_remaining, len);
-        len = rx_remaining;
-    }
-    if (req_state == REQ_UPLOAD) {
-
-        rx_remaining -= len;
-#if DEBUG_USB_RAW
-        printf("usbFunctionWrite addr: 0x%08lx len: %i rx_remaining=%i\n",
-               req_addr, len, rx_remaining);
-#endif
-        cli();
-        sram_copy(req_addr, data, len);
-        sei();
-        req_addr += len;
-    }
-    return len;
-}
-
-uint8_t usbFunctionRead(uint8_t * data, uint8_t len)
-{
-    uint8_t i;
-    if (len > tx_remaining)
-        len = tx_remaining;
-    tx_remaining -= len;
-#if DEBUG_USB_RAW
-    printf("usbFunctionRead len=%i tx_remaining=%i \n", len, tx_remaining);
-#endif
-    for (i = 0; i < len; i++) {
-        *data = tx_buffer[len];
-        data++;
-    }
-    return len;
-}
-
 /*
  * ------------------------------------------------------------------------- 
  */
diff --git a/avr/usbload/usb_bulk.c b/avr/usbload/usb_bulk.c
new file mode 100644
index 0000000..b40cbd7
--- /dev/null
+++ b/avr/usbload/usb_bulk.c
@@ -0,0 +1,66 @@
+
+#include <avr/io.h>
+#include <avr/pgmspace.h>       /* required by usbdrv.h */
+#include <avr/interrupt.h>      /* for sei() */
+#include <util/delay.h>         /* for _delay_ms() */
+
+#include <stdlib.h>
+
+#include "usbdrv.h"
+#include "oddebug.h"            /* This is also an example for using debug
+                                 * macros */
+#include "config.h"
+#include "requests.h"           /* The custom request numbers we use */
+#include "uart.h"
+#include "sram.h"
+#include "debug.h"
+#include "crc.h"
+#include "usb_bulk.h"
+
+extern uint8_t read_buffer[BUFFER_SIZE];
+extern uint32_t req_addr;
+extern uint32_t req_size;
+extern uint8_t req_bank;
+extern uint32_t req_bank_size;
+extern uint8_t req_state;
+extern uint8_t rx_remaining; 
+extern uint8_t tx_remaining;
+extern  uint8_t tx_buffer[32];
+
+uint8_t usbFunctionWrite(uint8_t * data, uint8_t len)
+{
+    if (len > rx_remaining) {
+        printf("usbFunctionWrite more data than expected remain: %i len: %i\n",
+               rx_remaining, len);
+        len = rx_remaining;
+    }
+    if (req_state == REQ_UPLOAD) {
+
+        rx_remaining -= len;
+#if DEBUG_USB_RAW
+        printf("usbFunctionWrite addr: 0x%08lx len: %i rx_remaining=%i\n",
+               req_addr, len, rx_remaining);
+#endif
+        cli();
+        sram_copy(req_addr, data, len);
+        sei();
+        req_addr += len;
+    }
+    return len;
+}
+
+uint8_t usbFunctionRead(uint8_t * data, uint8_t len)
+{
+    uint8_t i;
+    if (len > tx_remaining)
+        len = tx_remaining;
+    tx_remaining -= len;
+#if DEBUG_USB_RAW
+    printf("usbFunctionRead len=%i tx_remaining=%i \n", len, tx_remaining);
+#endif
+    for (i = 0; i < len; i++) {
+        *data = tx_buffer[len];
+        data++;
+    }
+    return len;
+}
\ No newline at end of file
diff --git a/avr/usbload/usb_bulk.h b/avr/usbload/usb_bulk.h
new file mode 100644
index 0000000..4f93a1f
--- /dev/null
+++ b/avr/usbload/usb_bulk.h
@@ -0,0 +1,3 @@
+
+uint8_t usbFunctionWrite(uint8_t * data, uint8_t len);
+uint8_t usbFunctionRead(uint8_t * data, uint8_t len);
\ No newline at end of file