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Most of the libraries for analog processing ( 0-10V, 4-20mA…) are using “real” as output. For an analog output module you need a datatype “word”. How can I easily convert real to word?
Does a library exist with a function REAL_TO_WORD function?
I think it must be also possible with pointers but have anyone experience with it and/or having a example program?
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The standard includes a REAL_TO_WORD() function. You only need to check with your hardware documentation to see what numerical value corresponds to the real world voltage or current signals.
Usually you perform a scaling function first to create the number you need to send to the analog output, for instance, a 12 bit analog output would likely take numbers from 0 to 4095.
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The word output is sometimes strangely formatted.
but in general the conversion like ndzied tells is working,
Inputs are sometimes shifted so will need special attention before scaling.
Have a look at the oscat library with many functions for this.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Most of the libraries for analog processing ( 0-10V, 4-20mA…) are using “real” as output. For an analog output module you need a datatype “word”. How can I easily convert real to word?
Does a library exist with a function REAL_TO_WORD function?
I think it must be also possible with pointers but have anyone experience with it and/or having a example program?
The standard includes a REAL_TO_WORD() function. You only need to check with your hardware documentation to see what numerical value corresponds to the real world voltage or current signals.
Usually you perform a scaling function first to create the number you need to send to the analog output, for instance, a 12 bit analog output would likely take numbers from 0 to 4095.
The word output is sometimes strangely formatted.
but in general the conversion like ndzied tells is working,
Inputs are sometimes shifted so will need special attention before scaling.
Have a look at the oscat library with many functions for this.