I am using DE2 Board. I want to write 1MB of data into flash and my flash is 4MB. My code is below:
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# include <stdio.h># include <stdlib.h># include <unistd.h># include "altera_avalon_pio_regs.h"# include "system.h"# include "alt_types.h"# include "sys/alt_flash.h" # include "sys/alt_flash_dev.h"
# define size 0xFFFFF
int main (int argc, char* argv[], char* envp[])
{
alt_flash_fd* fd;
int ret_code, i;
int *p1;
int *p2;
p1 = SDRAM_BASE+0x200000;
p2 = EXT_FLASH_BASE;
for(i=0;i<size;i++)
{
IOWR(p1, i, i);
}
fd = alt_flash_open_dev(EXT_FLASH_NAME);
if (fd!=NULL)
{
if((ret_code = alt_write_flash(fd, 0x0, p1, 4096)) == 0)
{
printf("Done writing into flash\n");
printf("Reading data from flash...\n");
for(i=0;i<size;i++)
{
printf("Value at %X is %u\n", p2, *p2);
p2 = p2+1;
}
}else
{
printf("Error in writing to flash\n");
}
}else
{
printf("Error in opening flash\n");
exit(1);
}
printf("DONE\n");
return 0;
}
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First, I am storing 1MB of data into SDRAM. then from SDRAM, i write into flash. to test whether the result is correct, I read the data out from the flash. a part of my output is as below:
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Value at 142FFF4 is 49149
Value at 142FFF8 is 49150
Value at 142FFFC is 49151
Value at 1430000 is 4294967295
Value at 1430004 is 4294967295
Value at 1430008 is 4294967295
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suppose i will get the 1MB data but it stops at address 142FFFC.
Please help! Thanks!
