Opps, fix compile for slow speeds

teensy3/usb_desc.h

 #ifndef _usb_desc_h_
 #define _usb_desc_h_
 
-#if F_CPU >= 20000000
-
 // This header is NOT meant to be included when compiling
 // user sketches in Arduino.  The low-level functions
 // provided by usb_dev.c are meant to be called only by
 #endif // NUM_ENDPOINTS
 #endif // USB_DESC_LIST_DEFINE
 
-#endif // F_CPU >= 20 MHz
-
 #endif

teensy3/usb_flightsim.cpp

 #include <string.h>    // for memcpy()
 
 #ifdef FLIGHTSIM_INTERFACE // defined by usb_dev.h -> usb_desc.h
+#if F_CPU >= 20000000
 
 FlightSimCommand * FlightSimCommand::first = NULL;
 FlightSimCommand * FlightSimCommand::last = NULL;
 }
 }
 
+#endif // F_CPU
 #endif // FLIGHTSIM_INTERFACE

teensy3/usb_joystick.c

 #include <string.h> // for memcpy()
 
 #ifdef JOYSTICK_INTERFACE // defined by usb_dev.h -> usb_desc.h
-
+#if F_CPU >= 20000000
 
 uint32_t usb_joystick_data[3];
 
 
 
 
-
+#endif // F_CPU
 #endif // JOYSTICK_INTERFACE

teensy3/usb_keyboard.c

 #include <string.h> // for memcpy()
 
 #ifdef KEYBOARD_INTERFACE // defined by usb_dev.h -> usb_desc.h
-
+#if F_CPU >= 20000000
 
 // which modifier keys are currently pressed
 // 1=left ctrl,	   2=left shift,   4=left alt,	  8=left gui
 }
 
 
+#endif // F_CPU
 #endif // KEYBOARD_INTERFACE

teensy3/usb_midi.c

 #include "HardwareSerial.h"
 
 #ifdef MIDI_INTERFACE // defined by usb_dev.h -> usb_desc.h
-
+#if F_CPU >= 20000000
 
 uint8_t usb_midi_msg_channel;
 uint8_t usb_midi_msg_type;
 }
 
 
+#endif // F_CPU
 #endif // MIDI_INTERFACE

teensy3/usb_mouse.c

 #include <string.h> // for memcpy()
 
 #ifdef MOUSE_INTERFACE // defined by usb_dev.h -> usb_desc.h
+#if F_CPU >= 20000000
 
 // which buttons are currently pressed
 uint8_t usb_mouse_buttons_state=0;
 }
 
 
-
+#endif // F_CPU
 #endif // MOUSE_INTERFACE

teensy3/usb_rawhid.c

 //#include "HardwareSerial.h"
 
 #ifdef RAWHID_INTERFACE // defined by usb_dev.h -> usb_desc.h
+#if F_CPU >= 20000000
 
 int usb_rawhid_recv(void *buffer, uint32_t timeout)
 {
 	return RAWHID_TX_SIZE;
 }
 
+#endif // F_CPU
 #endif // RAWHID_INTERFACE

teensy3/usb_serial.c

 
 // defined by usb_dev.h -> usb_desc.h
 #if defined(CDC_STATUS_INTERFACE) && defined(CDC_DATA_INTERFACE)
+#if F_CPU >= 20000000
 
 uint32_t usb_cdc_line_coding[2];
 volatile uint8_t usb_cdc_line_rtsdtr=0;
 
 
 
-
-
-
-
-
+#endif // F_CPU
 #endif // CDC_STATUS_INTERFACE && CDC_DATA_INTERFACE

teensy3/usb_serial.h

 
 #include "usb_desc.h"
 
-#if defined(CDC_DATA_INTERFACE)
+#if defined(CDC_STATUS_INTERFACE) && defined(CDC_DATA_INTERFACE)
 
 #include <inttypes.h>
 
 
 #endif // F_CPU
 
-#endif // CDC_DATA_INTERFACE
+#endif // CDC_STATUS_INTERFACE && CDC_DATA_INTERFACE
 
 #endif // USBserial_h_