QML and C++ creating/sharing a database?
Dubs last edited by
I need to run an algorithm on data that originates from two different sources:
1- UART ( raw transducer data)
2- variables a user inputs into a gui
The result is then output to the gui for the user to see
- User inputs variables via a gui (written in qml - i actually have no choice on this)
- The qml creates a database of all variables, then
- Invokes C++ routines for collecting raw data over a UART , saves it to a file,
- the C++ module opens up the database and extracts variables needed , opens the file reads in the data, runs the algorithm using both, calculates the answer and writes it to the database,
- program then jumps back to QML where, later, the QML will go into the database to extract that answer and display it.
If you see a flaw already please let me know before I spend hours finding out this wont work. If it is plausible.....
(1) who should run the UART - C++ or QML? anyone knows pros /cons? The raw data will have to be post processed so i'm thinking it will need file saving (I'm thinking UART is a C++ thing)
(2) I need to create a database from user input variables from QML - any one have examples of this?
(3) - the QML must do a Q_INVOKABLE to the C++ routines (to run the algorithm) . I've already run a test program to prove I can do that so not too worried though if anyone has any examples I'd love to see how others do this.
(4) BOTH the QML and the C++ need to access (read and write) the database created in (2).
Is this doable? If so...anyone have any examples of QML and C++ sharing the same database, any code, videos, anything? Should I keep opening and closing the database or is there a way to open it and have some pointer or something be passed around. I can't find anything about QML accepting or passing a pointer.
(using ARM® Cortex™-A9 embedded linux qt)
mrdebug last edited by
You can do everything and it isn't so hard. It is a typical scenario with an embedded device with a display (qml, uart, sqlite, tcp ..., This is my core businness).
I suggest you to study each element or ask to someone to write the app for you and, after that, I suggest you to study it (it is more quickly if you are a beginner).
Wich kind of device have you to manage? Wich kind of implementation is it for?
Dubs last edited by
Thank you for your response!
Are you saying my plan seems plausible? Have you done these things before or is it an educated guess ?
I'm in R&D so I can't tell you exactly what we're doing but I can tell you we're using a NXP imX6 with embedded linux and qt and the rest i have to say generalities - a device that measures something and also has user inputs how/what to measure - it's going to run a gui and a uart with data will be coming in both ways ( not at the same time- the gui will say "go" after variable inputs to start a measurement).
Then I'll need to do computing on all that data and then write results somewhere that will again, be accessed later and printed out to gui.
I am brand new to Qt but regardless it's my responsibility to get an accurate game plan and pluck away at the pieces.
I dont and won't have anyone to write me anything. I have no say in that.. such is life.
that's why - any literature, tutorials, videos that's what i'm searching for/diving into
thanks for your time, much appreciated!