Getting data from Qt creator Application Output and assigning it to a variable
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wrote on 20 Nov 2020, 08:59 last edited by
Hi,
I want to assign the data shown on the Application Output screen in Qt creator to a variable as a string and keep it in that variable, but I couldn't find how to do it. On the output screen, I get the following information "can0 605 [8] 20 00 20 02 DD 00 00 00" I want to assign this data as a string in Qt creator. How can I do it ? -
Hi,
I want to assign the data shown on the Application Output screen in Qt creator to a variable as a string and keep it in that variable, but I couldn't find how to do it. On the output screen, I get the following information "can0 605 [8] 20 00 20 02 DD 00 00 00" I want to assign this data as a string in Qt creator. How can I do it ?@safiye QtCreator is an IDE. Please explain better what you want to do.
Do you have an app which starts another one and you want to get the stdout from the second in the first one? -
wrote on 20 Nov 2020, 09:54 last edited by
@jsulm I want to assign the data I read from the can bus communication protocol to a variable in my study and then use that variable. Now, I can see the data I read with the Can-bus protocol on the Qt Application Output. I want to use the data I see here by assigning it to a variable in Qt creator.
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@jsulm I want to assign the data I read from the can bus communication protocol to a variable in my study and then use that variable. Now, I can see the data I read with the Can-bus protocol on the Qt Application Output. I want to use the data I see here by assigning it to a variable in Qt creator.
wrote on 20 Nov 2020, 10:12 last edited by@safiye
Start by running your app outside of Qt Creator. Do you still see that line of output? What is generating it where, and how is it being output. You'll need to know that before you can think about capturing it, if it's even possible.... -
@jsulm I want to assign the data I read from the can bus communication protocol to a variable in my study and then use that variable. Now, I can see the data I read with the Can-bus protocol on the Qt Application Output. I want to use the data I see here by assigning it to a variable in Qt creator.
@safiye said in Getting data from Qt creator Application Output and assigning it to a variable:
I read from the can bus communication protocol
If you're already reading it then what is the problem to put this data into a variable?
Please show how you're reading this data. -
wrote on 21 Nov 2020, 12:14 last edited by safiye
@jsulm and @JonB I am sending a hexadecimal code with the startDetached function in the code I have prepared in Qt Creator. In response to the code I send, the can-bus protocol sends me a response code (in hexedecimal form). I can only see the hexadecimal response the can-bus sent me in the Qt output. This hex I see in the output section. I want to assign the answer code to a value and use it in my Qt code that I have prepared.
I am sending hexadecimal codes with ID 605 in Applicaiton Output section. In response, Can-bus ID is sending me the 585 hexadecimal codes. I want to assign and use hexadecimal codes with an ID of 585 to a value.
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@jsulm and @JonB I am sending a hexadecimal code with the startDetached function in the code I have prepared in Qt Creator. In response to the code I send, the can-bus protocol sends me a response code (in hexedecimal form). I can only see the hexadecimal response the can-bus sent me in the Qt output. This hex I see in the output section. I want to assign the answer code to a value and use it in my Qt code that I have prepared.
I am sending hexadecimal codes with ID 605 in Applicaiton Output section. In response, Can-bus ID is sending me the 585 hexadecimal codes. I want to assign and use hexadecimal codes with an ID of 585 to a value.
Hi @safiye,
I think you should rather use Qt CAN Bus instead running command line programs and parsing their output.
Regards
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@jsulm and @JonB I am sending a hexadecimal code with the startDetached function in the code I have prepared in Qt Creator. In response to the code I send, the can-bus protocol sends me a response code (in hexedecimal form). I can only see the hexadecimal response the can-bus sent me in the Qt output. This hex I see in the output section. I want to assign the answer code to a value and use it in my Qt code that I have prepared.
I am sending hexadecimal codes with ID 605 in Applicaiton Output section. In response, Can-bus ID is sending me the 585 hexadecimal codes. I want to assign and use hexadecimal codes with an ID of 585 to a value.
wrote on 21 Nov 2020, 12:23 last edited by@safiye said in Getting data from Qt creator Application Output and assigning it to a variable:
the can-bus protocol sends me a response code (in hexedecimal form). I can only see the hexadecimal response the can-bus sent me in the Qt output. This hex I see in the output section.
In that case it is not sending you anything. Rather, it is probably writing something to stdout, and you happen to see that in Creator's Output Window.
If you have to do it this way you would have to capture that output from the command, parse and act on it.
If @aha_1980 has said you can access some CAN API directly from Qt then presumably that is the correct/better way to go to access the data you want than running an external program and parsing its output, but I know nothing about CAN Bus.
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Hi @safiye,
I think you should rather use Qt CAN Bus instead running command line programs and parsing their output.
Regards
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Hi @aha_1980 do you think I cannot use the hexadecimal responses from the output screen to a variable in another way? Because I couldn't achieve this with Qt Can Bus.
wrote on 21 Nov 2020, 12:28 last edited by@safiye
Any reason to ignore what I said? If you really have to run an external command, and that writes to stdout, and you want to access that, you have to use theQProcessmethods to read that output. @aha_1980 is not a magician and won't be able to make it otherwise if you are not calling a CAN API but doing it via an OS command.... -
Hi @aha_1980 do you think I cannot use the hexadecimal responses from the output screen to a variable in another way? Because I couldn't achieve this with Qt Can Bus.
Hi @aha_1980 do you think I cannot use the hexadecimal responses from the output screen to a variable in another way?
Both will work, but using an API is the cleaner way.
Because I couldn't achieve this with Qt Can Bus.
Well, than it would be helpful if you state what you did and what exactly did not work.
Have you already tried the example?
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@safiye
Any reason to ignore what I said? If you really have to run an external command, and that writes to stdout, and you want to access that, you have to use theQProcessmethods to read that output. @aha_1980 is not a magician and won't be able to make it otherwise if you are not calling a CAN API but doing it via an OS command....wrote on 21 Nov 2020, 12:44 last edited byThank you @JonB. I will also review and try the Qprocess methods.
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Hi @aha_1980 do you think I cannot use the hexadecimal responses from the output screen to a variable in another way?
Both will work, but using an API is the cleaner way.
Because I couldn't achieve this with Qt Can Bus.
Well, than it would be helpful if you state what you did and what exactly did not work.
Have you already tried the example?
wrote on 21 Nov 2020, 12:55 last edited by -
wrote on 21 Nov 2020, 13:01 last edited by
@safiye said in Getting data from Qt creator Application Output and assigning it to a variable:
Thank you @JonB. I will also review and try the Qprocess methods.
Just to say: if you have to use
QProcessyou will have to do that. But I am sure you really do not want to do it this way, you ought be getting the API working as @aha_1980 is saying. -