Better solution - change compile time token names to DEVICE_STATE_AS_GPIOR and HOST_STATE_AS_GPIOR and allow the user to set them to the index of the GPIOR register within the device to use.

1 files changed, 17 insertions, 11 deletions

diff --git a/LUFA/Drivers/USB/HighLevel/USBTask.h b/LUFA/Drivers/USB/HighLevel/USBTask.h
index 768057aef..960131563 100644
--- a/LUFA/Drivers/USB/HighLevel/USBTask.h
+++ b/LUFA/Drivers/USB/HighLevel/USBTask.h
@@ -82,10 +82,11 @@
 					 *  \ref HOST_STATE_Configured and \ref HOST_STATE_Suspended states which are not implemented by

 					 *  the library.

 					 *

-					 *  To reduce program size and speed up checks of this global, it can be placed into the AVR's GPIOR1

-					 *  hardware register instead of RAM by defining the HOST_STATE_AS_GPIOR1 token in the project

-					 *  makefile and passing it to the compiler via the -D switch. When defined, the GPIOR1 register should

-					 *  not be used in the user application except implicitly via the library APIs.

+					 *  To reduce program size and speed up checks of this global, it can be placed into one of the AVR's

+					 *  GPIOR hardware registers instead of RAM by defining the HOST_STATE_AS_GPIOR token to a value 

+					 *  between 0 and 2 in the project makefile and passing it to the compiler via the -D switch. When

+					 *  defined, the corresponding GPIOR register should not be used in the user application except

+					 *  implicitly via the library APIs.

 					 *

 					 *  \note This global is only present if the user application can be a USB host.

 					 *

@@ -95,12 +96,14 @@
 					 */

 					extern volatile uint8_t USB_HostState;

 				#else

-					#define USB_HostState GPIOR1

+					#define _GET_HOST_GPIOR_NAME2(y) GPIOR ## y

+					#define _GET_HOST_GPIOR_NAME(x)  _GET_HOST_GPIOR_NAME2(x)

+					#define USB_HostState _GET_HOST_GPIOR_NAME(HOST_STATE_AS_GPIOR)

 				#endif

 			#endif

 

 			#if defined(USB_CAN_BE_DEVICE) || defined(__DOXYGEN__)

-				#if !defined(DEVICE_STATE_AS_GPIOR0) || defined(__DOXYGEN__)

+				#if !defined(DEVICE_STATE_AS_GPIOR) || defined(__DOXYGEN__)

 					/** Indicates the current device state machine state. When in device mode, this indicates the state

 					 *  via one of the values of the \ref USB_Device_States_t enum values.

 					 *

@@ -108,10 +111,11 @@
 					 *  library. The only exception to this rule is if the NO_LIMITED_CONTROLLER_CONNECT token is used

 					 *  (see \ref EVENT_USB_Connect() and \ref EVENT_USB_Disconnect() events).

 					 *

-					 *  To reduce program size and speed up checks of this global, it can be placed into the AVR's GPIOR0

-					 *  hardware register instead of RAM by defining the DEVICE_STATE_AS_GPIOR0 token in the project

-					 *  makefile and passing it to the compiler via the -D switch. When defined, the GPIOR0 register should

-					 *  not be used in the user application except implicitly via the library APIs.

+					 *  To reduce program size and speed up checks of this global, it can be placed into one of the AVR's

+					 *  GPIOR hardware registers instead of RAM by defining the DEVICE_STATE_AS_GPIOR token to a value 

+					 *  between 0 and 2 in the project makefile and passing it to the compiler via the -D switch. When

+					 *  defined, the corresponding GPIOR register should not be used in the user application except

+					 *  implicitly via the library APIs.

 					 *

 					 *  \note This global is only present if the user application can be a USB device.

 					 *

@@ -124,7 +128,9 @@
 					 */

 					extern volatile uint8_t USB_DeviceState;

 				#else

-					#define USB_DeviceState GPIOR0

+					#define _GET_DEVICE_GPIOR_NAME2(y) GPIOR ## y

+					#define _GET_DEVICE_GPIOR_NAME(x)  _GET_DEVICE_GPIOR_NAME2(x)

+					#define USB_DeviceState _GET_DEVICE_GPIOR_NAME(DEVICE_STATE_AS_GPIOR)

 				#endif

 			#endif