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Prevent the CDC Device Class driver from sending empty IN packets on every service task call - only send termination packets when data is in the endpoint.

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This commit is contained in:
Dean Camera 2009-09-10 06:41:57 +00:00
parent b221e7d175
commit e918d977b1
4 changed files with 23 additions and 19 deletions
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4
LUFA/Drivers/USB/Class/Device/CDC.h
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@ -192,10 +192,8 @@
/** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.
*
* \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
*
* \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum
*/
uint8_t CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
void CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Sends a Serial Control Line State Change notification to the host. This should be called when the virtual serial
* control lines (DCD, DSR, etc.) have changed states, or to give BREAK notfications to the host. Line states persist