新建 文本文档 (6).txt

Altera的flash读写源码

#include <stdio.h> 
#include <sys/alt_flash.h>
#include "system.h"
#include <unistd.h>
#define DATA_OFFSET 0x300000

int main(void)
{
  alt_flash_fd* flash_handle; 
  FILE *uart;
  char write_data = 0;
  char read_data = 0;
  write_data = 100; 
  uart = fopen(UART_NAME,"w");  
  flash_handle = alt_flash_open_dev(CFI_FLASH_NAME);
      fprintf(uart, "open flash device...\\n");
      usleep(10000);  
  if (flash_handle)
  {
    fprintf(uart, "open flash device successed!!!\\n");
      usleep(10000);        
    alt_write_flash(flash_handle, DATA_OFFSET, &write_data, 1);
      fprintf(uart, "wirte_data = %d\\n", write_data);
      usleep(10000);
    alt_read_flash(flash_handle, DATA_OFFSET, &read_data, 1);
      fprintf(uart, "read_data = %d\\n", read_data);
      usleep(10000);
    if(read_data == write_data)
    {
      fprintf(uart, "flash write and read successed!!!\\n");
      usleep(10000);
    }
    else
    {
      fprintf(uart, "flash write or read failed!!!\\n");
      usleep(10000);
    }  
    alt_flash_close_dev(flash_handle);
      fprintf(uart, "close flash device...\\n");
      usleep(10000);     
  }
  else
  {
    fprintf(uart, "open flash device failed!!!\\n");
      usleep(10000);  
  }  
}