a UW8$@s8dZddlZddlZGdddeZGdddeZGdddeZGd d d eZGd d d ejZ e d kr4ddl Z ddl Z ddl Z dZGdddeZejedddZe ee$Zede dWdn1s0YejedddZe eeZee\ZZede dedS)z%Support threading with serial ports. Nc@s(eZdZdZddZddZddZdS) Protocolzq Protocol as used by the ReaderThread. This base class provides empty implementations of all methods. cCsdS)z$Called when reader thread is startedNself transportrr|j||j|jvr:|j|jd\}|_||q dS)z9Buffer received data, find TERMINATOR, call handle_packetN)rextend TERMINATORsplit handle_packet)rr packetrrrr <s  zPacketizer.data_receivedcCs tddSz1Process packets - to be overridden by subclassingz/please implement functionality in handle_packetNNotImplementedErrorrr'rrrr&CszPacketizer.handle_packet) rrrrr$rrrr r& __classcell__rrr rr%s rcsPeZdZdZdZdZddZddZfdd Zd d Z d d Z ddZ Z S) FramedPacketz Read binary packets. Packets are expected to have a start and stop marker. The class also keeps track of the transport. ()cCst|_d|_d|_dS)NF)rr' in_packetrrrrrrRszFramedPacket.__init__cCs ||_dSrrrrrrrWszFramedPacket.connection_madecs,d|_d|_|jdd=tt||dS)rNF)rr0r'rr-rrr rrr[s zFramedPacket.connection_lostcCsrt|D]b}||jkr d|_q ||jkrNd|_|t|j|jdd=q |jrb|j|q | |q dS)z4Find data enclosed in START/STOP, call handle_packetTFN) serialZ iterbytesSTARTr0STOPr&bytesr'r#handle_out_of_packet_data)rr Zbyterrrr bs  zFramedPacket.data_receivedcCs tddSr(r)r+rrrr&pszFramedPacket.handle_packetcCsdS)z0Process data that is received outside of packetsNrr rrrr5tsz&FramedPacket.handle_out_of_packet_data) rrrrr2r3rrrr r&r5r,rrr rr-Hs r-c@s4eZdZdZdZdZdZddZddZd d Z d S) LineReaderzZ Read and write (Unicode) lines from/to serial port. The encoding is applied. s zutf-8replacecCs|||j|jdSr) handle_linedecodeENCODINGUNICODE_HANDLINGr+rrrr&szLineReader.handle_packetcCs tddS)z2Process one line - to be overridden by subclassingz-please implement functionality in handle_lineNr))rlinerrrr8szLineReader.handle_linecCs"|j||j|j|jdS)z Write text to the transport. ``text`` is a Unicode string and the encoding is applied before sending ans also the newline is append. N)rwriteencoder:r;r$)rtextrrr write_lineszLineReader.write_lineN) rrrrr$r:r;r&r8r@rrrrr6ysr6csXeZdZdZfddZddZddZdd Zd d Zd d Z ddZ ddZ Z S) ReaderThreada Implement a serial port read loop and dispatch to a Protocol instance (like the asyncio.Protocol) but do it with threads. Calls to close() will close the serial port but it is also possible to just stop() this thread and continue the serial port instance otherwise. csDtt|d|_||_||_d|_t|_ t |_ d|_ dS)z Initialize thread. Note that the serial_instance' timeout is set to one second! Other settings are not changed. TN) rrArdaemonr1protocol_factoryalive threadingLock_lockEvent_connection_madeprotocol)rZserial_instancerCr rrrs  zReaderThread.__init__cCs*d|_t|jdr|j|ddS)zStop the reader threadF cancel_readN)rDhasattrr1rKjoinrrrrstops  zReaderThread.stopc CsPt|jdsd|j_||_z|j|WnBtyp}z*d|_|j||j WYd}~dSd}~00d}|j |jr4|jj r4z|j |jj pd}Wn8tjy}z|}WYd}~q4WYd}~qd}~00|rz|j|Wqty0}z|}WYd}~q4WYd}~qd}~00qd|_|j|d|_dS)z Reader looprKr"FN)rMr1timeoutrCrJrr rDrrIsetZis_openreadZ in_waitingZSerialExceptionr )reerrorr rrrruns6     $& zReaderThread.runcCs6|j|j|Wdn1s(0YdS)zThread safe writing (uses lock)N)rGr1r=r rrrr=szReaderThread.writecCs<|j"||jWdn1s.0YdS)z8Close the serial port and exit reader thread (uses lock)N)rGrOr1closerrrrrVszReaderThread.closecCs4|jr(|j|jstd||jfStddS)zj Wait until connection is set up and return the transport and protocol instances. connection_lost already calledzalready stoppedN)rDrIwait RuntimeErrorrJrrrrconnects   zReaderThread.connectcCs&||j|js td|jS)zs Enter context handler. May raise RuntimeError in case the connection could not be created. rW)startrIrXrDrYrJrrrr __enter__s  zReaderThread.__enter__cCs |dS)zLeave context: close portN)rV)rexc_typeZexc_valZexc_tbrrr__exit__szReaderThread.__exit__) rrrrrrOrUr=rVrZr\r^r,rrr rrAs # rA__main__zloop://cs,eZdZfddZddZddZZS) PrintLinescs*tt||tjd|ddS)Nz port opened z hello world)rr`rsysstdoutr=r@rr rrrs zPrintLines.connection_madecCstjd|dS)Nzline received: {!r} )rarbr=formatr rrrr8szPrintLines.handle_linecCs|rt|tjddS)Nz port closed ) traceback print_excrarbr=rrrrrs zPrintLines.connection_lost)rrrrr8rr,rrr rr` s r`ir")ZbaudraterPZhellorL)rr1rEobjectrrr-r6ThreadrArratimerdZPORTr`Zserial_for_urlZserrJr@sleeptr[rZrrVrrrr s0#1q   (