Same source code is working correctly if compiled with other compiler like
- gcc
Regards,
Raman
On Thursday, October 1, 2015 at 11:40:15 AM UTC+5:30, Raman Sharma wrote:
>
> Hi Floh,
>
> Thanks for the update.
> let me add some more information about my process.
>
> I'm trying to open USB serial port(/dev/ttyUSB0) using system call :
>
>
> int fd = open ("/dev/ttyUSB0", O_RDONLY);
> if (fd == -1)
> {
> printf ("error %d opening: %s", errno, strerror (errno));
> return 0;
> }
>
> I have created a simple application "port_open.cpp" inside that invoked
> the system call and compiled source file using emscripten which creats
> output a.out.js .
>
> On execution of a.out.js using node ,getting an error " "No such Directory
> or file". "
> Is there any way in Emscripten to open serial ports- ttyUSB*?
>
> Note: I'm not using any HTML API's.
>
> Regards,
> Raman
>
> On Wednesday, September 30, 2015 at 7:44:27 PM UTC+5:30, Floh wrote:
>>
>> You generally can't directly access low-level operating system services
>> like /dev from a browser for security reasons. Some services may be wrapped
>> through HTML5 APIs (e.g. WebGL, WebAudio, WebRTC etc) and emscripten uses
>> those to emulate common low level APIs so that a lot of code can compile,
>> but I guess you're out of lack for directly accessing USB, and especially
>> /dev, which non-portable Linux concept.
>>
>> Googling for 'HTML5 USB' might provide more clues but I wouldn't get my
>> hopes up :)
>>
>> Cheers,
>> -Floh.
>>
>> Am Mittwoch, 30. September 2015 09:37:04 UTC+2 schrieb Raman Sharma:
>>>
>>> Hi ,
>>>
>>> I have a USB device in Linux that uses the FTDI USB serial device
>>> converter driver. When I plug it in, it creates: /dev/ttyUSB0
>>> I'm trying to open the enumerated port /dev/ttyUSB0 ,but getting an
>>> issue that "No such Directory or file".
>>>
>>> Note:
>>> For testing purpose:
>>> I have used EMBED feature to map the folder raman
>>> (/dev/raman/hello_word.txt) on virtual file system created by Emscripten
>>> and able to open a file(hello_word.txt) using fopen function.
>>>
>>> But when try to map /dev/ directory, compilation stuck for infinite
>>> without any exception.
>>> Please provide inputs to open the port "/dev/ttyUSB0".
>>>
>>> TIA.
>>>
>>> Regards,
>>> Raman
>>>
>>
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