diff --git a/src/usb.h b/src/usb.h
index b61e702f2..69adcf96b 100644
--- a/src/usb.h
+++ b/src/usb.h
@@ -7,7 +7,9 @@ typedef struct
     uint8_t pid; //low 4 bits are the real pid, top 4 bits are just ~pid
     uint8_t dev_addr;
     uint8_t dev_endpoint;
-    uint8_t* data;
+    int crc5;
+    uint16_t crc16;
+    uint8_t data[1024];
     int len;
     void* device;
 } usb_packet_t;
@@ -26,7 +28,14 @@ typedef enum
 
 typedef enum
 {
+    USB_PID_TOKEN_STALL = 0x1e,
     USB_PID_TOKEN_SETUP = 0x2d,
+    USB_PID_TOKEN_PRE = 0x3c,
+    USB_PID_TOKEN_DATA1 = 0x4b,
+    USB_PID_TOKEN_NAK = 0x5a,
     USB_PID_TOKEN_IN = 0x69,
+    USB_PID_TOKEN_SOF = 0xa5,
+    USB_PID_TOKEN_DATA0 = 0xc3,
+    USB_PID_TOKEN_ACK = 0xd2,
     USB_PID_TOKEN_OUT = 0xe1
 } usb_pid_type_t;
\ No newline at end of file