diff --git a/source/exploit/dwc3.elf b/source/exploit/dwc3.elf
index 9fb9c66..1531389 100755
Binary files a/source/exploit/dwc3.elf and b/source/exploit/dwc3.elf differ
diff --git a/source/exploit/dwc3.o b/source/exploit/dwc3.o
index 6ecab74..bf81e16 100644
Binary files a/source/exploit/dwc3.o and b/source/exploit/dwc3.o differ
diff --git a/source/exploit/readme.md b/source/exploit/readme.md
new file mode 100644
index 0000000..7d40077
--- /dev/null
+++ b/source/exploit/readme.md
@@ -0,0 +1,5 @@
+# Exploit
+
+## test_dwc3
+simple dwc3 usb implementation to send/receive data.
+
diff --git a/source/exploit/test_dwc3.c b/source/exploit/test_dwc3.c
index 24acf4c..b50ba48 100644
--- a/source/exploit/test_dwc3.c
+++ b/source/exploit/test_dwc3.c
@@ -13,13 +13,11 @@ extern void rom_send();
 #define data_received 0x02021800 + 0x2004
 
 void recv_data_cb(uint32_t endpoint, uint32_t len){
-    // void *rbuf;
     char *dest_buf = (char *)recv_buffer;
     volatile void *dref = (void *)data_received;
     
     void *rbuf = get_endpoint_recv_buffer(endpoint);
     for(int i= 0; i < len; i++){
-        // *(char *)dest_buf = *(char *)(void *)((int)rbuf + i);
         dest_buf[i] = *(char *)(void *)((int)rbuf + i);
     }
     *(uint8_t *)dref = 1; // Mark as ready
@@ -44,23 +42,16 @@ void recv_data(){
 }
 
 void send_data_cb(uint32_t endpoint, uint32_t len){
-    // void *rbuf;
-    // void *dest_buf = (void *)recv_buffer;
+    // Tell event handler that the data was received
     volatile void *dref = (void *)data_received;
-    
-    // rbuf = get_endpoint_buffer(endpoint);
-    // for(int i= 0; i < len; i++){
-    //     *(char *)dest_buf = *(char *)(void *)((int)rbuf + i);
-    // }
     *(uint8_t *)dref = 1; // Mark as ready
 }
 
 void send_data(uint32_t address, uint32_t size){
     volatile void *dref = (void *)data_received;
     *(uint8_t *)dref = 0;
-    uint32_t val = 0x0;
     maybe_usb_setup_read(0x1, send_data_cb, 0x200);
-    uint32_t rbuf = get_endpoint_recv_buffer(1);
+    // uint32_t rbuf = get_endpoint_recv_buffer(1);
     dwc3_ep0_start_trans(1, address, 0x200);
     while(1){
         usb_event_handler();
@@ -76,14 +67,6 @@ int main() {
     uint32_t count = 0;
     while(1){
         recv_data();
-        // rom_send();
         send_data(recv_buffer, 0x200);
     }
-    
-    
-
-    // recv_data();
-    // sleep(1, 5000);
-    asm("mov x0, #0x0");
-    asm("br x0");
 }
\ No newline at end of file