Lpc2000

DECwiz (Fred van Kempen) <decwiz@...> schrieb am Tue, 19 Jul 2005 
01:14:33 -0700 (PDT):

> Hi All,
>
> I've stumbled into something very weird this weekend, and I can't seem
> to figure out what the problem is.  Here is a snippet of code:
>
> /* Write a value to a CS8900A I/O register. */
> static void
> lan_iow(unsigned char *base, int reg, unsigned short val)
> {
>     unsigned char *p;
>     unsigned char x;
>
>     /* Write low and high byte of register number. */
>     p = (base + reg);
> printf(" IOW(%d, %d) P=%08lx\n", reg, val, p);
>     x = (val & 0xff);
>     *p = x;
>     p++;
>     x = ((val >> 8) & 0xff);
>     *p = x;
> printf(" done\n");
> }

One note: Make pointers volatile otherwise the compiler might do things
_you_ do not intend (like removing code).
This might not be related to your problem.

-- 
42Bastian Schick