Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

C example under uClinux

Hallo

I want to write a C program. This C program should use a led on my NIOS II Evaluation Kit, Cyclone Edition. I think i can use the command outl but i believe i must use the include header asm/io.

My first question.

Is that correct?

But i have not this header. So what can i do. Have anyone an idea? Have anyone this header?

Thanks

2 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    19 years ago

    #define inl(addr)

    ({

    unsigned int __res;

    __asm__ __volatile__(

    "ldwio %0, 0(%1)"

    : "=r"(__res)

    : "r" (addr));

    __res;

    })

    //-----------------------------------------------------------------------

    # define inb(addr)

    ({

    unsigned int __res;

    __asm__ __volatile__(

    "ldbio %0, 0(%1)"

    : "=r"(__res)

    : "r" (addr));

    __res;

    })

    //-----------------------------------------------------------------------

    # define outl(b,addr)

    ({

    __asm__ __volatile__(

    "stwio %0, 0(%1)"

    : : "r"(http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/cool.gif , "r" (addr));

    })

    //-----------------------------------------------------------------------

    # define outw(b,addr)

    ({

    __asm__ __volatile__(

    "sthio %0, 0(%1)"

    : : "r"(http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/cool.gif , "r" (addr));

    })

    //-----------------------------------------------------------------------

    # define outb(b,addr)

    ({

    __asm__ __volatile__(

    "stbio %0, 0(%1)"

    : : "r"(http://forum.niosforum.com/work2/style_emoticons/<#EMO_DIR#>/cool.gif , "r" (addr));

    })