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标题: nios II 读写 CFI_FLash [打印本页]

作者: yqzhang 时间: 2010-8-27 13:19
标题: nios II 读写 CFI_FLash
#include <stdio.h>

#include "io.h"
#include "system.h"

#include "alt_types.h"
#include "sys/alt_flash.h"
#include "sys/alt_flash_dev.h"
#include "altera_avalon_pio_regs.h"
void test_flash_block();
void test_flash_bytes();

int main()
{
test_flash_bytes();
return 0;
}
//按字节来读写
void test_flash_bytes()
{
alt_flash_fd *my_flash; //define handle
flash_region* regions;
int number_of_regions;
int ret_code ;

my_flash = alt_flash_open_dev(CFI_FLASH_NAME);//open flash, get handle
if(my_flash == NULL)
{
      printf("Open flash fail \n");
      return 0;
}

char buf[]="Hello world!";
int  nAddr = 0x0;
int  tempAddr = nAddr;

ret_code = alt_get_flash_info (my_flash, &regions, &number_of_regions);
if(my_flash != NULL)
{
      int j = 0;
      for(j=0;j<number_of_regions;j++)
      {
         printf("regions[%d].offset = %d \n", j, regions[j].offset);
         printf("regions[%d].region_size = %d \n", j, regions[j].region_size);
         printf("regions[%d].number_of_blocks = %d\n", j, regions[j].number_of_blocks);
         printf("regions[%d].block_size = %d \n\n", j, regions[j].block_size);
      }
}
else
{
      printf("get flash info fail \n");
}

// ret_code = alt_write_flash(my_flash,nAddr,buf,sizeof(buf));
// memset(buf,0, sizeof(buf));
// alt_read_flash(my_flash, tempAddr, buf, sizeof(buf));
// printf("%s",buf);

int i=0;
for(i=0;i<sizeof(buf);i++, nAddr++)
{
ret_code = alt_write_flash(my_flash,nAddr,&buf[i],1);
usleep(100*1000);
if(ret_code != 0)
{
      printf("write flash fail \n");
      return 0;
}
}
memset(buf, 0,sizeof(buf));

for(i=0;i<sizeof(buf);i++, tempAddr++)
{
   alt_read_flash(my_flash, tempAddr, &buf[i], 1);
   printf("%c", buf[i]);
}

alt_flash_close_dev(my_flash);
}

//按块来读写
void test_flash_block()
{
alt_flash_fd *my_flash; //define handle
flash_region* regions;
int number_of_regions;
int ret_code ;
char *buf = NULL;

my_flash = alt_flash_open_dev(CFI_FLASH_NAME);//open flash, get handle
if(my_flash == NULL)
{
      printf("Open flash fail \n");
      return;
}

ret_code = alt_get_flash_info (my_flash, &regions, &number_of_regions);
if(my_flash != NULL)
{
      int j = 0;
      for(j=0;j<number_of_regions;j++)
      {
         printf("\n******************regions %d*************************\n",j);
         printf("regions[%d].offset = %d \n", j, regions[j].offset);
         printf("regions[%d].region_size = %d \n", j, regions[j].region_size);
         printf("regions[%d].number_of_blocks = %d\n", j, regions[j].number_of_blocks);
         printf("regions[%d].block_size = %d \n\n", j, regions[j].block_size);

         buf = (char*)malloc(regions[j].block_size);
         memset(buf, 'a', regions[j].block_size);

         ret_code = alt_write_flash(my_flash,regions[j].offset,buf,regions[j].block_size);
         if(ret_code != 0)
         {
               printf("write flash fail \n");
               return;
         }
         memset(buf,0, regions[j].block_size);

         ret_code = alt_read_flash(my_flash, regions[j].offset, buf, regions[j].block_size);
         if(ret_code != 0)
         {
            printf("read flash fail \n");
            return;
         }

         int i=0;
         for(i=0;i< 20 ;i++)
         {
            printf("%c",buf[i]);
         }

         free(buf);
      }
}
else
{
      printf("get flash info fail \n");
}

alt_flash_close_dev(my_flash);
}

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