#include <cs_port.h>
| class CSerial : public CObject |
| Protected Attributes | |
|---|---|
| TVersion | iVersion |
| Public Member Functions | |
|---|---|
| CSerial() | |
| ~CSerial() | |
| void | ConstructL(RLibrary &) |
| pure virtual void | Info(TSerialInfo &) |
| void | ModuleName(TDes &) |
| pure virtual CPort * | NewPortL(const TUint) |
| virtual IMPORT_C TSecurityPolicy | PortPlatSecCapability(TUint) |
| virtual IMPORT_C TBool | QueryVersionSupported(const TVersion &) |
Factory for a single CPort object.
CSerial is the base class for implementations of serial port factories. It is intended to be overridden by the CSY so that C32 can call in and ask the CSY to create serial ports. In this way the factory is responsible for creating instances of CPort-derived classes for the protocol of the CSY. It also provides query functions, which return general information about the capabilities of the serial protocol implemented by the CSY.
Owned by the CPort object it creates.
Writing derived classes:
The pure virtual NewPortL() and Info() functions must be implemented in derived classes. Serial protocol modules which can take differing action based on the version of the comms server should also override QueryVersionSupported().
| TVersion | iVersion | [protected] |
Module version number. The class should initialise this member with its version number from its constructor.
| IMPORT_C | CSerial | ( | ) |
Default constructor.
Derived classes can implement a NewL() function if they require two-phase construction.
| void | ConstructL | ( | RLibrary & | aLib | ) |
Allocate a CLibrary unloader
| Parameter | Description |
|---|---|
| aLib | reference to the library to be unloaded in the future |
| void | Info | ( | TSerialInfo & | aSerialInfo | ) | [pure virtual] |
Specifies the protocol for getting the information about the serial protocol.
Implementations should fill in the TSerialInfo structure to reflect the protocol's capabilities.
| Parameter | Description |
|---|---|
| aSerialInfo | On return, set to indicate the capabilities of the serial protocol. |
| void | ModuleName | ( | TDes & | aName | ) |
Get the module name from the libary reference
| Parameter | Description |
|---|---|
| aName | Module name will be written to this descriptor. |
Specifies the protocol for creating a new serial port for the protocol. The comms server calls this function in response to a RComm:Open() call.
Typically, the implementation would call NewL() on the protocol's CPort-based class. Any resources required by the new port object should be done at this stage. If the serial port object cannot be created for any reason, NewPortL() should leave with an appropriate error code.
The interpretation of unit numbers is specific to the particular serial protocol module. However, unit numbers on Symbian OS should be zero-based. For the default built-in serial ports implemented by the serial protocol module ecuart.csy, the unit numbers refer to the hardware ports, with 0 being the first port on the machine. If a second request is made to create a port with a unit number that has already been created and not destroyed, NewPortL() should leave with KErrAlreadyExists.
| Parameter | Description |
|---|---|
| aUnit | The unit number to be created. |
| IMPORT_C TSecurityPolicy | PortPlatSecCapability | ( | TUint | aPort | ) | const [virtual] |
Retrieve the security policy for a requested port. This base implementation sets the default policy to be an 'AlwaysFail' policy.
| Parameter | Description |
|---|---|
| aPort | Port number. |
Returns: TSecurityPolicy Security policy associated with opeing this port
Specifies the protocol for checking the supplied TVersion against the protocol's module version.
The default implementation calls User::QueryVersionSupported() to perform the check against the object's iVersion member.
| Parameter | Description |
|---|---|
| aVersion | The version to be checked. |
Returns: ETrue if the version is supported.