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Arm_sqrt_q31 on a Kinetis K MCU

Question asked by Eric Paljan on Nov 5, 2014
Latest reply on Nov 27, 2014 by Kan_Li

Hello guys,

 

I have a very big Problem. I have to implement the arm_sqrt_q31 on my MCU and I cant find any usefull example how I can use it. I wasted a whole day for trying to implement it succuessfull. Is here anyone who can give an example how I can use that function for getting the square root of 144 or another easy number?

 

Here is one of my tries:

 

#include "arm_math.h"

 

int main(void)

{   

    uint32_t n;

    arm_status status;

    status=ARM_MATH_SUCCESS;

 

    int32_t    temp4    =    0;

    float temp5        =    0;

 

    arm_sqrt_q31(144,&temp4);

    arm_q31_to_float(&temp4,&temp5,1);

...

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