supwisdom/sp_flash.c

#include "sp_constant.h"
#include "sp_util.h"

#include "sp_flash.h"

uint16 sp_flash_read(uint32 addr,uint8 buf[],uint32 len)
{
  return HW_Flash_Read(addr,len,buf);
}
uint16 sp_flash_write(uint32 addr,uint8 buf[],uint32 len)
{
  if(addr < DEF_IAP_BASE_ADDR)
  {
    return RC_FLASH_NO_RIGHT;
  }
  return HW_Flash_NotEraseWrite(addr,len,buf);
}
uint16 sp_flash_erase(uint32 addr)
{
  if(addr < DEF_IAP_BASE_ADDR)
  {
    return RC_FLASH_NO_RIGHT;
  }
  return HW_Flash_PageErase(addr / FLASH_PAGE_SIZE);
}

/**
**¶ÁÈ¡Ò»Ò³Êý¾Ý,È«FF±íʾÎÞÊý¾Ý
**@param len > 128 error
**@return ·µ»Ø0±íʾ²éÕÒÊý¾Ý³É¹¦
**@return ·µ»Ø·Ç0±íʾÎÞÓÐЧÊý¾Ý
**/
uint16 sp_flash_page_read(uint32 addr,uint8 buf[],uint32 len)
{
  uint32 i;
  uint32 offset = 0;
  uint8 temp[128];

  if(len > sizeof(temp))
  {
    return 1;
  }

  while(1)
  {
    i = 0;
    sp_flash_read(addr +offset,temp, len);
    while(i < len)
    {
      if(0xFF == temp[i])
      {
        ++i;
      }
      else
      {
        break;
      }
    }
    if(len == i)
    {
      if(0 == offset)
      {
        //ÎÞÊý¾Ý
        return 1;
      }
      else
      {
        sp_flash_read(addr +offset -len,buf, len);
        return 0;
      }
    }
    offset += len;
    if(DEF_FLASH_PageSize < (offset +len)) //  ³¬¹ýµ±Ò³Î´ÕÒµ½·µ»Ø1
    {
      return 1;
    }
  }
}
/**
**дһҳÊý¾Ý
**@param len > 32 error
**@return ·µ»Ø0±íʾ¼Ç¼Êý¾Ý³É¹¦
**@return ·µ»Ø·Ç0±íʾдFLASHʧ°Ü
**/
uint16 sp_flash_page_write(uint32 addr,uint8 buf[],uint32 len)
{
  uint32 i;
  uint32 offset = 0;
  uint8 temp[64];

  if(len > 64)
  {
    return 1;
  }
  while(1)
  {
    i = 0;
    sp_flash_read(addr +offset,temp, len);
    while(i < len)
    {
      if(0xFF == temp[i])
      {
        ++i;
      }
      else
      {
        break;
      }
    }
    if(DEF_FLASH_PageSize < (offset +len)) //  ³¬¹ýµ±Ò³±íʾÒÑдÂú,²Á³ýÖØд
    {
      sp_flash_erase(addr);
      return sp_flash_write(addr,buf, len);
    }
    if(len == i)
    {
      //ÎÞÊý¾Ý
      return sp_flash_write(addr +offset,buf, len);
    }
    offset += len;
  }
}