Re: [Pharo-project] Opening a serial Port with Pharo on Linux

Nov. 11, 2012

      Luc Fabresse <luc.fabresse@gmail.com> writes:
...
2012/11/11 Friedrich Dominicus <frido@q-software-solutions.de>
Luc Fabresse <luc.fabresse@gmail.com> writes:
>
    > Did you tried:
    >
    > sPort := SerialPort new.
    > sPort close.
    > sPort openPort: '/dev/ttyS0'.
    No, but now I did and with a symbolic link
    from /dev/ttyUSB0 to /dev/ttyS0 Â I get this thing opened?
I do not understand why you need a symlink.Â 
Well in the end I want to open /dev/ttyUSB0 and 
this is what I've done:
ls -l ttyS*    
lrwxrwxrwx 1 root root        7 Nov  8 15:11 ttyS0 -> ttyUSB0
So there is a symbolic link from /dev/ttyUSB0 to /dev/ttyS0

Now if I'm trying:

sPort := SerialPort new.
sPort close.
sPort openPort: '/dev/ttyUSB0'.

I get:

11 November 2012 4:26:26.774 pm

VM: unix - i686 - linux-gnu - CoInterpreter VMMaker-oscog-EstebanLorenzano.166 uuid: 5773fcb9-2982-4507-8a9e-4308ec33731e Nov  6 2012, StackToRegisterMappingCogit VMMaker-oscog-EstebanLorenzano.166 uuid: 5773fcb9-2982-4507-8a9e-4308ec33731e Nov  6 2012, https://git.gitorious.org/cogvm/blessed.git Commit: a7bf128cd3b9389e77ea0cdec9a515282926a483 Date: 2012-11-02 14:17:44 +0100 By: Esteban Lorenzano <estebanlm@gmail.com> Jenkins build #136
Image: Pharo1.4 [Latest update: #14457]

SerialPort(Object)>>error:
	Receiver: SerialPort(closed, 9600 baud, 8 bits, 1 stopbits, no parity)
	Arguments and temporary variables: 
		aString: 	'Cannot open ''/dev/ttyUSB0'''
	Receiver's instance variables: 
		port: 	nil
		baudRate: 	9600
		stopBitsType: 	1
		parityType: 	0
		dataBits: 	8
		outputFlowControlType: 	0
		inputFlowControlType: 	0
		xOnByte: 	19
		xOffByte: 	24

SerialPort>>openPort:
	Receiver: SerialPort(closed, 9600 baud, 8 bits, 1 stopbits, no parity)
	Arguments and temporary variables: 
		portId: 	'/dev/ttyUSB0'
		result: 	nil
	Receiver's instance variables: 
		port: 	nil
		baudRate: 	9600
		stopBitsType: 	1
		parityType: 	0
		dataBits: 	8
		outputFlowControlType: 	0
		inputFlowControlType: 	0
		xOnByte: 	19
		xOffByte: 	24

If I'm doing:

SerialPort(#'/dev/ttyS0', 9600 baud, 8 bits, 1 stopbits, no parity)

So the port is properly opened. 

Don't ask me why I'm not understanding it.

Regards
Friedrich