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Cache the USB_DeviceState variable internally in the library core when multiple checks are required in a single loop iteration, to reduce compiled code size.

This commit is contained in:
Dean Camera 2010-10-06 10:16:02 +00:00
parent 93793679c9
commit 3ae9e6042f
6 changed files with 30 additions and 23 deletions
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15
LUFA/Drivers/USB/HighLevel/Template/Template_Endpoint_Control_R.c
View File

@ -8,13 +8,14 @@ uint8_t TEMPLATE_FUNC_NAME (void* Buffer,
while (Length)
{
if (Endpoint_IsSETUPReceived())
return ENDPOINT_RWCSTREAM_HostAborted;
uint8_t USB_DeviceState_LCL = USB_DeviceState;
if (USB_DeviceState == DEVICE_STATE_Unattached)
if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
return ENDPOINT_RWCSTREAM_DeviceDisconnected;
else if (USB_DeviceState == DEVICE_STATE_Suspended)
else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
return ENDPOINT_RWCSTREAM_BusSuspended;
else if (Endpoint_IsSETUPReceived())
return ENDPOINT_RWCSTREAM_HostAborted;
if (Endpoint_IsOUTReceived())
{
@ -30,9 +31,11 @@ uint8_t TEMPLATE_FUNC_NAME (void* Buffer,
while (!(Endpoint_IsINReady()))
{
if (USB_DeviceState == DEVICE_STATE_Unattached)
uint8_t USB_DeviceState_LCL = USB_DeviceState;
if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
return ENDPOINT_RWCSTREAM_DeviceDisconnected;
else if (USB_DeviceState == DEVICE_STATE_Suspended)
else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
return ENDPOINT_RWCSTREAM_BusSuspended;
}

20
LUFA/Drivers/USB/HighLevel/Template/Template_Endpoint_Control_W.c
View File

@ -11,16 +11,16 @@ uint8_t TEMPLATE_FUNC_NAME (const void* Buffer,
while (Length || LastPacketFull)
{
if (Endpoint_IsSETUPReceived())
return ENDPOINT_RWCSTREAM_HostAborted;
uint8_t USB_DeviceState_LCL = USB_DeviceState;
if (Endpoint_IsOUTReceived())
break;
if (USB_DeviceState == DEVICE_STATE_Unattached)
if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
return ENDPOINT_RWCSTREAM_DeviceDisconnected;
else if (USB_DeviceState == DEVICE_STATE_Suspended)
else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
return ENDPOINT_RWCSTREAM_BusSuspended;
else if (Endpoint_IsSETUPReceived())
return ENDPOINT_RWCSTREAM_HostAborted;
else if (Endpoint_IsOUTReceived())
break;
if (Endpoint_IsINReady())
{
@ -40,9 +40,11 @@ uint8_t TEMPLATE_FUNC_NAME (const void* Buffer,
while (!(Endpoint_IsOUTReceived()))
{
if (USB_DeviceState == DEVICE_STATE_Unattached)
uint8_t USB_DeviceState_LCL = USB_DeviceState;
if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
return ENDPOINT_RWCSTREAM_DeviceDisconnected;
else if (USB_DeviceState == DEVICE_STATE_Suspended)
else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
return ENDPOINT_RWCSTREAM_BusSuspended;
}

6
LUFA/Drivers/USB/LowLevel/Endpoint.c
View File

@ -115,9 +115,11 @@ uint8_t Endpoint_WaitUntilReady(void)
return ENDPOINT_READYWAIT_NoError;
}
if (USB_DeviceState == DEVICE_STATE_Unattached)
uint8_t USB_DeviceState_LCL = USB_DeviceState;
if (USB_DeviceState_LCL == DEVICE_STATE_Unattached)
return ENDPOINT_READYWAIT_DeviceDisconnected;
else if (USB_DeviceState == DEVICE_STATE_Suspended)
else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
return ENDPOINT_READYWAIT_BusSuspended;
else if (Endpoint_IsStalled())
return ENDPOINT_READYWAIT_EndpointStalled;

4
LUFA/ManPages/ChangeLog.txt
View File

@ -18,7 +18,7 @@
* handling of USB Start of Frame events while in USB Host mode
* - Added new PRNT_Host_BytesReceived(), PRNT_Host_ReceiveByte(), PRNT_Host_SendByte() and PRNT_Host_Flush() functions to the
* Print Host Class driver
* - Added class specific descriptor type defines with standard USB-IF element naming
* - Added class specific descriptor alternative struct type defines with standard USB-IF element naming
* - Added new project makefile template to the library and moved board driver stub files into in a new "CodeTemplates" directory
* - Added board hardware driver support for the Linnix UDIP development board
* - Added board hardware driver support for the Busware BUI development board
@ -42,7 +42,7 @@
* - Changed over all demos, drivers and internal functions to use the current frame number over the Start of Frame flag where possible
* to free up the Start of Frame flag for interrupt use in the user application
* - All project makefiles now correctly clean intermediate build files from assembly and C++ sources (thanks to Daniel Czigany)
* - Removed the EVENT_USB_InitFailure() event, not specifying a USB mode now defaults to UID selection mode
* - Removed the EVENT_USB_InitFailure() event, not specifying a USB mode correctly now defaults to UID selection mode
* - Renamed and moved class driver common constant definitions to make the naming scheme more uniform
* - Changed default value for the reset polarity parameter in the AVRISP-MKII project so that it defaults to active low drive
* - Changed configuration descriptor parser for all host mode projects and class drivers to ensure better compatibility with devices

2
LUFA/ManPages/WhyUseLUFA.txt
View File

@ -40,7 +40,7 @@
* into difficulties or need some advice. In addition, you can also email the library author to receive personalized
* support when you need it (subject to author's schedule).
*
* <small>* Atmel Stack Mouse Device Demo 4292 bytes, LUFA Mouse Low Level Device Demo 3372 bytes, under identical build
* <small>* Atmel Stack Mouse Device Demo 4292 bytes, LUFA Mouse Low Level Device Demo 3332 bytes, under identical build
* environments</small>
*/