请教对SRAM的读写操作问题(附程序) #include <stdio.h>
#include "system.h"
#include "alt_types.h" int main()
{
alt_u32 i;
int j;
int *p1;
int a[2048];
int b[2048];
for(i=0;i<2048;i++)
{
a=i+1;
}
for(i=0;i<0x800;i++)
{
IOWR_8DIRECT(0x00400000, 0, a);
}
printf("Hello from NIOS II!\n");
p1=(int*)0x00401000;
for(j=0;j<0x800;j++)
{
IORD_8DIRECT(0x00401000, 0);
b[j]=(*p1)&0xff;
printf("%d\n",b[j]);
}
printf("Hello from Host!\n");
return 0;
} 报错为: **** Build of configuration Debug for project hello_world_0 **** make -s all
Compiling hello_world.c...
../hello_world.c: In function `main':
../hello_world.c:22: warning: implicit declaration of function `IOWR_8DIRECT'
../hello_world.c:31: warning: implicit declaration of function `IORD_8DIRECT'
../hello_world.c:40:2: warning: no newline at end of file
Linking hello_world_0.elf...
obj/hello_world.o(.text+0x7c): In function `main':
../hello_world.c:22: undefined reference to `IOWR_8DIRECT'
obj/hello_world.o(.text+0xc4):../hello_world.c:31: undefined reference to `IORD_8DIRECT'
collect2: ld returned 1 exit status
make: *** [hello_world_0.elf] Error 1
Build completed in 11.344 seconds
[此贴子已经被作者于2007-8-29 19:19:25编辑过] | 
