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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.

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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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8
LUFA/Drivers/USB/LowLevel/Endpoint.c
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@ -115,10 +115,12 @@ 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)
return ENDPOINT_READYWAIT_BusSuspended;
else if (USB_DeviceState_LCL == DEVICE_STATE_Suspended)
return ENDPOINT_READYWAIT_BusSuspended;
else if (Endpoint_IsStalled())
return ENDPOINT_READYWAIT_EndpointStalled;