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Home Forum HAL HAL Components Matrix Math in HAL

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TOPIC: Matrix Math in HAL

Matrix Math in HAL 28 Avr 2011 16:21 #9484

  • meisu
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Does anyone know how to implement matrix math in HAL? I haven't been able to initialize two dimensional array variables and I can't get C functions to compile that would do the arithmetic for me, once the 2-d arrays were implemented. Any help or direction to help would be appreciated.

Thanks,
Peter
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Re:Matrix Math in HAL 28 Avr 2011 16:26 #9485

  • BigJohnT
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Are you attempting this in comp?

John
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Re:Matrix Math in HAL 28 Avr 2011 16:46 #9488

  • andypugh
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BigJohnT wrote:
Are you attempting this in comp?

If so, you might find this patch pushed to the 2.5 branch a couple of days ago is helpful:
git.linuxcnc.org/gitweb?p=emc2.git;a=com...74df2f35e4b636d85b9d
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Re:Matrix Math in HAL 29 Avr 2011 05:45 #9498

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Yes, I am attempting this in comp.
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Re:Matrix Math in HAL 29 Avr 2011 05:47 #9499

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So, if I put an asterisk in front of the variable name I can make it a pointer to a 2-d array? Then can I define the 2-d array with #define?

Such As:

variable float *2darray;

function(main);

;;
#define 2darray[2][2] = {3,5,2,7};


Will this work?
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Re:Matrix Math in HAL 29 Avr 2011 07:08 #9506

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No, that won't work, the define will be overridden in the generated code
Would that work in normal C?
You should be able to define the pointer then kmalloc it then index into it as an array.
It might be easier to switch to editing the generated C code if this is a one-off for your own use.
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