Some consideration:
in any case the SerialPort after the first open don't close right
the connection.
( and raise the problem as in my last email. )
From other program i can't manage the RS232 device until i close the
Pharo image,
even if all SerialPort instances are close.
Thanks,
Dario
> Ciao,
>
>> Try adding (Smalltalk garbageCollect) after the #close.
>
> I add it, but after the SerialPort allInstances return an array with
> aSerialPort.
>
> Strange it's close.
>
>
> I found what "generate" the problem it's in the openPort: method.
>
> ----------------------------------------------------------------
> openPort: portId
> "Open the given serial port, using the settings specified by my
> instance variables."
>
> | result |
>
> self close.
>
> "8-10 - wks - this has to tell us if it fails: step 1, save the
> primitive result"
> result := portId isString
> ifTrue: [self
> primOpenPortByName: portId
> baudRate: baudRate
> stopBitsType: stopBitsType
> parityType: parityType
> dataBits: dataBits
> inFlowControlType: inputFlowControlType
> outFlowControlType: outputFlowControlType
> xOnByte: xOnByte
> xOffByte: xOffByte]
> ifFalse: [self
> primOpenPort: portId
> baudRate: baudRate
> stopBitsType: stopBitsType
> parityType: parityType
> dataBits: dataBits
> inFlowControlType: inputFlowControlType
> outFlowControlType: outputFlowControlType
> xOnByte: xOnByte
> xOffByte: xOffByte].
>
> "wks - raise an error if there was a failure."
> result isNil ifTrue:[ self error:'Cannot open ', portId printString. ].
>
> port := portId
>
> _------------------------------------------------
>
> The result isNotNil the thirst time i call the
> openPort: it's set at aSerialPort
>
> isNil the last time i
> call the openPort
>
> But if i remove the test : result isNil ifTrue:[ self
> error:'Cannot open ', portId printString. ].
>
> all works fine the first and the following call.
>
> There is something wrong in the primitive call answer.
>
> Anyone is expert in this ?
>
>
> Thanks,
>
> Dario
>
>>
>> Now a question of my own for the list. Why does it seem common to do three
>> #garbageCollects in a row.
>>
>> cheers -ben
>>
>>
>> Sven Van Caekenberghe wrote:
>>>
>>> Dario,
>>>
>>> On 17 Feb 2014, at 12:55, Dario Trussardi <[email protected]>
>>> wrote:
>>>
>>>
>>>> Thanks Sven,
>>>>
>>>>
>>>>> You should #close the port when you are done, else it remains in use, I
>>>>> would guess.
>>>>>
>>>> Of course, i used :
>>>>
>>>>
>>>> | srl |
>>>> srl := SerialPort new.
>>>> srl openPort: 'COM1'.
>>>>
>>>> srl nextPutAll: #[ 27 66 2 2 ] .
>>>>
>>>> srl close.
>>>>
>>>> But after the first time, when submit the same code the system answer:
>>>>
>>>> Error: Cannot open 'COM1'
>>>>
>>>> I don't unterstand because.
>>>>
>>>
>>> Me neither. I have no experience working with serial ports (but I know some
>>> people on the list do), let alone on Windows, but from looking at the code
>>> #close should be enough.
>>>
>>>
>>>> I note what the sometimes SerialPort allInstances answer
>>>> instance after the close method.
>>>>
>>>> Perhaps remain occupied some resources?
>>>>
>>>
>>> They are still there because they are not yet garbage collected. If they
>>> are properly closed (check the printString in the inspector), the external
>>> resource should have been released.
>>>
>>> Sorry, but I can't help you any further.
>>>
>>> Sven
>>>
>>>
>>>> Ciao,
>>>>
>>>> Dario
>>>>
>>>>
>>>>> Also, why do you #close before you start, seems strange to me ?
>>>>>
>>>>> On 17 Feb 2014, at 12:05, Dario Trussardi <[email protected]>
>>>>> wrote:
>>>>>
>>>>>
>>>>>> Ciao,
>>>>>>
>>>>>>
>>>>>>
>>>>>>> Hi,
>>>>>>>
>>>>>>> I'm also interested by an answer to that question. So far, what I have
>>>>>>> as status is: you need a plugin to handle communications with the
>>>>>>> serial port (either for direct RS232 or USB-to-Serial) and compiling
>>>>>>> the serial port plugin with the Pharo VM makes it unstable.
>>>>>>>
>>>>>> I dont know " compiling " plugin area. ( i work with Windows 7 )
>>>>>>
>>>>>>
>>>>>>> The solution we used was: to compile the serial plugin for the squeak
>>>>>>> VM and work in Squeak (4.3) instead of Pharo.
>>>>>>>
>>>>>> Can you explain more detail about it?
>>>>>>
>>>>>>
>>>>>> My test is :
>>>>>>
>>>>>>
>>>>>> I download the Pharo 2.0 #20628 and i use the
>>>>>> SerialPort class.
>>>>>>
>>>>>> The first time i do the code:
>>>>>>
>>>>>> | srl |
>>>>>>
>>>>>> srl := SerialPort new.
>>>>>> srl close.
>>>>>>
>>>>>> srl openPort: 'COM1'.
>>>>>>
>>>>>> srl nextPutAll: #[ 27 66 2 2 ] .
>>>>>>
>>>>>> The RS232 device work fine.
>>>>>>
>>>>>> After the first time, when submit the same code the system answer:
>>>>>>
>>>>>> Error: Cannot open 'COM1'
>>>>>>
>>>>>> A this time i need to restart the Pharo environment.
>>>>>>
>>>>>>
>>>>>> Any considerations, suggestions ?
>>>>>>
>>>>>>
>>>>>> Thanks,
>>>>>>
>>>>>> Dario
>>>>>>
>>>>>>
>>>>>>
>>>>>>> Thierry
>>>>>>>
>>>>>>> Le 16/02/2014 16:28, Dario Trussardi a écrit :
>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>>
>>>>>>>> i work with: Pharo1.Latest update: #14445
>>>>>>>> ( or with: Pharo2.0 Latest update: #20628 ).
>>>>>>>>
>>>>>>>>
>>>>>>>> I'm interested to manage communications with USB or
>>>>>>>> RS232 device.
>>>>>>>>
>>>>>>>>
>>>>>>>> I can find package which support this protocol?
>>>>>>>>
>>>>>>>> Thank for any considerations ?
>>>>>>>>
>>>>>>>> Dario
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> --
>>>>>>> Thierry Goubier
>>>>>>> CEA list
>>>>>>> Laboratoire des Fondations des Systèmes Temps Réel Embarqués
>>>>>>> 91191 Gif sur Yvette Cedex
>>>>>>> France
>>>>>>> Phone/Fax: +33 (0) 1 69 08 32 92 / 83 95
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>
