How to use the niosii custom instructiont?

http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/ph34r.gif hello,

I did a niosii custom instructiont mode,and input it into my system via SOPC,but I ran

into troublesome when I oprate the custom instructiont mode in NIOSII IDE.

According to the Example B(p2-1,Bit-Swap Custom Instruction) of Software Interface of

"Nios II Custom Istrucrion User Guide" ,the custom instruction used in applacation code

should be as follows the form:

1.#include "system.h"

2int main(void)

{

int a = 0x12345678;

int a_swap =0;

a_swap= ALT_CT_BSWAP(a);

return 0;

}

According to this kind of form,my custom instructiont mode in applacation code do not

work !

I fined the Another example of User Guid is different from this form.

...

alt_u8 zeros_hardware[NUM_SAMPLES];

alt_u32 numbers[NUM_SAMPLES];

...

void hardware_leading_zeros(void);

compare_leading_zeros(void);

...# ifdef ALT_CT_LEADING_ZERO_DETECTOR

hardware_leading_zeros(void);

compare_leading_zeros(void);# endif ALT_CT_LEADING_ZERO_DETECTOR

...# ifdef ALT_CT_LEADING_ZERO_DETECTOR

zeros_hardware = alt_ct_leading_zero_detector(numbers);# endif ALT_CT_LEADING_ZERO_DETECTOR

...

When I put my custom instructiont mode into the leading-zeros-detector example running

well ,my custom instructiont mode can work well! but when I put my custom instructiont

mode into my system without sysid,it can not work again.

why ?!

whether the custom instructiont mode in applacation code want a limited_times sysid or

other condition?

thank you. http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/rolleyes.gif

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