I'm generating code from simulink using embedded coder. In my simulink model I have an embedded matlab function containing the matlab command eig. When I try to compile the generated c-code in microCforPic32 I get errors on out of range numbers. In matlab double precision is standard, but my target processor is 32 bit, so I guess I would like to use single precision but dont see how I can set this for the temporary variables generated from matlabs own functions such as eig(). Below is part of the generated code: /* Function for MATLAB Function: ' /Eig' */ static void Calib_eml_matlab_ztgevc(const creal_T A[4], creal_T V[4]) {... Heres one of the lines within this function that cause troubles y = anorm; if (2.2250738585072014E-308 > anorm) { y = 2.2250738585072014E-308; } The tpe of y is defined in top of the function real_T y; Where real_T stands for double 64-bit, i'm pretty sure. I've tried to set the largest atomic size to float but does not change the value 2.2250738585072014E-308. I could of course change it mannualy in the c-code but I would prefer to solve it in matlab.

Embedded coder - how to control types of temporary variables within embedded Matlab function blocks

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Rebecka 2013-12-5

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https://ww2.mathworks.cn/matlabcentral/answers/108804-embedded-coder-how-to-control-types-of-temporary-variables-within-embedded-matlab-function-blocks

评论： Rebecka 2013-12-5

I'm generating code from simulink using embedded coder. In my simulink model I have an embedded matlab function containing the matlab command eig. When I try to compile the generated c-code in microCforPic32 I get errors on out of range numbers. In matlab double precision is standard, but my target processor is 32 bit, so I guess I would like to use single precision but dont see how I can set this for the temporary variables generated from matlabs own functions such as eig(). Below is part of the generated code:

/* Function for MATLAB Function: '<S17>/Eig' */ static void Calib_eml_matlab_ztgevc(const creal_T A[4], creal_T V[4]) {...

Heres one of the lines within this function that cause troubles y = anorm; if (2.2250738585072014E-308 > anorm) { y = 2.2250738585072014E-308; }

The tpe of y is defined in top of the function

real_T y;

Where real_T stands for double 64-bit, i'm pretty sure.

I've tried to set the largest atomic size to float but does not change the value 2.2250738585072014E-308. I could of course change it mannualy in the c-code but I would prefer to solve it in matlab.