8-bit MicrocontrollersのトピックRe: problem with Trigonometric functions ( cos, sin...)

problem with Trigonometric functions ( cos, sin...)

ferasq — Sun, 10 Feb 2013 13:33:43 GMT

Hey, I have HCS08JM32, I just, created a new project using floating point & #include <math.h>...

double x = cos(3.14) or any other value like cos(1), cos(1.5)... I don't get any correct answer!

for example:

double x = 0.5; // I get in the debugger x = 0.5

x = cos(3.14); // the x still equal to 0.5 in the debugger!

but when I do the same on MCF51AC256A, I get the right answers.

can you help me please!

thanks.

bigmac — Mon, 11 Feb 2013 04:29:38 GMT

Hello,

Did you increase the stack size from the default setting for the 'JM32. The trigonometric functions will require copious amounts of stack space.

Regards,

Mac

Monica — Mon, 18 Feb 2013 16:09:18 GMT

Feras,

please let us know if this suggestion is helpful, keep us posted! :smileyhappy:

Regards.

admin — Tue, 19 Feb 2013 06:30:43 GMT

Hey :smileyhappy:

that works now :smileyhappy: it was related to the stack size as suggested by bigmac!

thank u very much.

Monica — Tue, 19 Feb 2013 19:41:08 GMT

AWESOME! :smileygrin: