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标题: 勇哥，你怎么看 [打印本页]

作者: 金刀丸 时间: 2014-6-5 02:06
标题: 勇哥，你怎么看
开发出来了

作者: 金刀丸 时间: 2014-6-5 02:07

#ifndef FLASH_H_
#define FLASH_H_
#include "support_common.h"
#define FLASH_PAGESIZE 4096
#define FLASH_PROG_OFFSET 0x44000000//地址偏移量

#define FLASH_PROGRAM 0x20  //写入命令
#define FLASH_PAGE_ERASE 0x40//页擦除命令

void FlashPageErase(uint8 page);//擦除指定的页
void FlashPageWrite(uint8 page,uint16 pstart,uint32 N);//写flash
uint32  FlashRead(uint8 page,uint16 pstart);//读flash

#endif

#include"flash.h"
void FlashPageErase(uint8 page)//page为要擦除的页（0=<page<=127）,选第127页
{
      uint32*address;
      uint8 sector;
      address=(uint32*)(page*FLASH_PAGESIZE+FLASH_PROG_OFFSET);//1.算出页首地址
      sector=page/4;//对应的扇区

      MCF_CFM_CFMPROT&=~MCF_CFM_CFMPROT_PROTECT(sector);//2.解除对页所在扇区的保护

      MCF_CFM_CFMCLKD=MCF_CFM_CFMCLKD_DIV(30)
                     |MCF_CFM_CFMCLKD_PRDIV8;//3,设置flash的工作频率为161.3khz

      while(!(MCF_CFM_CFMUSTAT&MCF_CFM_CFMUSTAT_CBEIF));//4等待命令缓冲区空

         MCF_CFM_CFMUSTAT|=MCF_CFM_CFMUSTAT_PVIOL;//清侵害保护标志位
      MCF_CFM_CFMUSTAT|=MCF_CFM_CFMUSTAT_ACCERR;//清访问出错标志位

   *address=0x0;//5向擦除页内任意地址写任意值，以定位要擦除的的页

   MCF_CFM_CFMCMD=MCF_CFM_CFMCMD_CMD(FLASH_PAGE_ERASE);//6页擦除命令
MCF_CFM_CFMUSTAT|=MCF_CFM_CFMUSTAT_CBEIF;//7,启动命令执行

   while(!(MCF_CFM_CFMUSTAT&MCF_CFM_CFMUSTAT_CCIF));//8等待命令执行完成

}
void FlashPageWrite(uint8 page,uint16 pstart,uint32 N)//page是页号，pstart是该页中的字号（0=<page<=127），（0=<pstart<=1023）
{
      uint32*address;
      uint8 sector;
      address=(uint32*)(page*FLASH_PAGESIZE+pstart*4+FLASH_PROG_OFFSET);//1.算出字首地址
      sector=page/4;//对应的扇区

      MCF_CFM_CFMPROT&=~MCF_CFM_CFMPROT_PROTECT(sector);//2.解除对页所在扇区的保护

   MCF_CFM_CFMCLKD=MCF_CFM_CFMCLKD_DIV(30)
                     |MCF_CFM_CFMCLKD_PRDIV8;//3,设置flash的工作频率为161.3khz

   while(!(MCF_CFM_CFMUSTAT&MCF_CFM_CFMUSTAT_CBEIF));//4等待命令缓冲区空

      MCF_CFM_CFMUSTAT|=MCF_CFM_CFMUSTAT_PVIOL;//清侵害保护标志位
      MCF_CFM_CFMUSTAT|=MCF_CFM_CFMUSTAT_ACCERR;//清访问出错标志位

      *address=N;//5写入数据

      MCF_CFM_CFMCMD=MCF_CFM_CFMCMD_CMD(FLASH_PROGRAM);//6写入命令
      MCF_CFM_CFMUSTAT|=MCF_CFM_CFMUSTAT_CBEIF;//7,启动命令执行

   while(!(MCF_CFM_CFMUSTAT&MCF_CFM_CFMUSTAT_CCIF));//8等待命令执行完成

   MCF_CFM_CFMPROT|=MCF_CFM_CFMPROT_PROTECT(sector);//9.给所在页加保护


}
uint32  FlashRead(uint8 page,uint16 pstart)//page是页号，pstart是该页中的字号
{
      uint32*address;
      uint32 n;
      address=(uint32*)(page*FLASH_PAGESIZE+pstart*4);//1.算出字首地址
      n=*address;
      return n;
}

作者: 直立摄像头 时间: 2014-6-5 07:40
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作者: 爱哭的热带鱼 时间: 2014-6-5 09:04
哈哈哈

作者: z823213046 时间: 2014-6-6 21:05
顶一下

作者: demon_123 时间: 2015-8-21 17:20
我用快播看

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