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Add CDC control line state change handlers to the class driver demos, to demonstrate how to read DTR change events.

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This commit is contained in:
Dean Camera 2015-03-15 20:12:59 +11:00
parent be2df78637
commit faf41c4445
4 changed files with 70 additions and 0 deletions
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24
Demos/Device/ClassDriver/DualVirtualSerial/DualVirtualSerial.c
View File

@ -216,3 +216,27 @@ void EVENT_USB_Device_ControlRequest(void)
CDC_Device_ProcessControlRequest(&VirtualSerial2_CDC_Interface);
}
/** CDC class driver callback function the processing of changes to the virtual
* control lines sent from the host..
*
* \param[in] CDCInterfaceInfo Pointer to the CDC class interface configuration structure being referenced
*/
void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t *const CDCInterfaceInfo)
{
/* You can get changes to the virtual CDC lines in this callback; a common
use-case is to use the Data Terminal Ready (DTR) flag to enable and
disable CDC communications in your application when set to avoid the
application blocking while waiting for a host to become ready and read
in the pending data from the USB endpoints.
*/
bool HostReady = (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR) != 0;
if (CDCInterfaceInfo == &VirtualSerial1_CDC_Interface)
{
/ CDC interface 1's host is ready to send/receive data
}
else
{
// CDC interface 2's host is ready to send/receive data
}
}

15
Demos/Device/ClassDriver/VirtualSerial/VirtualSerial.c
View File

@ -185,3 +185,18 @@ void EVENT_USB_Device_ControlRequest(void)
CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
}
/** CDC class driver callback function the processing of changes to the virtual
* control lines sent from the host..
*
* \param[in] CDCInterfaceInfo Pointer to the CDC class interface configuration structure being referenced
*/
void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t *const CDCInterfaceInfo)
{
/* You can get changes to the virtual CDC lines in this callback; a common
use-case is to use the Data Terminal Ready (DTR) flag to enable and
disable CDC communications in your application when set to avoid the
application blocking while waiting for a host to become ready and read
in the pending data from the USB endpoints.
*/
bool HostReady = (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR) != 0;
}

16
Demos/Device/ClassDriver/VirtualSerialMassStorage/VirtualSerialMassStorage.c
View File

@ -224,6 +224,22 @@ void EVENT_USB_Device_ControlRequest(void)
MS_Device_ProcessControlRequest(&Disk_MS_Interface);
}
/** CDC class driver callback function the processing of changes to the virtual
* control lines sent from the host..
*
* \param[in] CDCInterfaceInfo Pointer to the CDC class interface configuration structure being referenced
*/
void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t *const CDCInterfaceInfo)
{
/* You can get changes to the virtual CDC lines in this callback; a common
use-case is to use the Data Terminal Ready (DTR) flag to enable and
disable CDC communications in your application when set to avoid the
application blocking while waiting for a host to become ready and read
in the pending data from the USB endpoints.
*/
bool HostReady = (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR) != 0;
}
/** Mass Storage class driver callback function the reception of SCSI commands from the host, which must be processed.
*
* \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface configuration structure being referenced

15
Demos/Device/ClassDriver/VirtualSerialMouse/VirtualSerialMouse.c
View File

@ -265,3 +265,18 @@ void CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t* const HIDI
// Unused (but mandatory for the HID class driver) in this demo, since there are no Host->Device reports
}
/** CDC class driver callback function the processing of changes to the virtual
* control lines sent from the host..
*
* \param[in] CDCInterfaceInfo Pointer to the CDC class interface configuration structure being referenced
*/
void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t *const CDCInterfaceInfo)
{
/* You can get changes to the virtual CDC lines in this callback; a common
use-case is to use the Data Terminal Ready (DTR) flag to enable and
disable CDC communications in your application when set to avoid the
application blocking while waiting for a host to become ready and read
in the pending data from the USB endpoints.
*/
bool HostReady = (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR) != 0;
}