c语言没有main()函数,什么原因啊?谢谢!

只看该作者 · 2008-7-18 14:45

有高手在吗?我从网上下载一个c语言程序,控制nandflash的没有main() 主函数这是为什么啊?
程序里面也没有定义什么的,这段是什么一思啊  谢谢啊!小弟急求啊!

程序如下:
unsigned char ReadByte(unsigned int blockadd,unsigned char pageadd);
unsigned char ReadSpare(unsigned int blockadd,unsigned char pageadd);
unsigned char ReadStatus(void);
unsigned int ReadID(void);
void BadBlockScan(void);
void CopyBack(unsigned int blockaddh_s,blockaddh_e);
void EraseBlock(unsigned int blockadd);
void NfAddre(unsigned int blockadd,unsigned char pageadd);
void NfCommand(unsigned char Com);
void ReadPage(unsigned int blockadd,unsigned char pageadd);
void ReadPageS(unsigned int blockadd,unsigned char select,pageadd);
void WirteByte(unsigned int blockadd,unsigned char pageadd,unsigned char buf);
void WirtePage(unsigned int blockadd,unsigned char pageadd);
void WirtePageF(unsigned int blockadd);
void WirteSpare(unsigned int blockadd,unsigned char pageadd,unsigned char buf);

/*=============================================================================
//参    数: unsigned char Com
//函数功能: 向K9F5608操作命令
=============================================================================*/
void NfCommand(unsigned char Com)
{
NF_CLE=1;
NF_WE=0;
P1=Com;
_nop_();
NF_WE=1;
NF_CLE=0;
P1=0xff;
}
/*=============================================================================
//参    数: unsigned int bolckadd  2nd 3th的地址 (Row地址)
      unsigned char pageadd  1st的地址   (Column地址)
//函数功能: 向K9F5608送地址
=============================================================================*/
void NfAddre(unsigned int blockadd,unsigned char pageadd)
{
NF_ALE=1;
NF_WE=0;
P1=pageadd;
_nop_();
NF_WE=1;

//送地址第一个字节
NF_WE=0;
P1=blockadd&0xff;
_nop_();
NF_WE=1;

//送地址第二个字节
NF_WE=0;
P1=blockadd/256;
_nop_();
NF_WE=1;

//送地址第三个字节
NF_ALE=0;
P1=0xff;
}
/*=============================================================================
//参    数: unsigned int blockaddh  2nd 3th的地址 (Row地址)

//函数功能: 页读 PAGE READ OPERATION
      可连续读512个字节
=============================================================================*/

void ReadPageF(unsigned int blockadd)
{
unsigned int i;
NF_RE=1;NF_CE=0;NF_CLE=0;NF_ALE=0;NF_WE=1;NF_WP=1;
NfCommand(0);             //送

读命令
NfAddre(blockadd,0);         //送开始字节
NF_RB=1;while(!NF_RB);        //Data Transfer from Cell to Register

max 10us
i=0;
P1=0xff;
do
{
  NF_RE=0;
  DataArray=P1;
  NF_RE=1;
  i++;
}
while(i<512);             //第1

页数据传送数据完成
NF_CE=1;
}
/*=============================================================================
//参    数: unsigned int blockaddh  2nd 3th的地址 (Row地址)
      unsigned char pageadd  1st的地址   (Column地址)
//函数功能: 页读 PAGE READ OPERATION
      可连续写256个字节
=============================================================================*/

void ReadPage(unsigned int blockadd,unsigned char pageadd)
{
unsigned char i;
NF_RE=1;NF_CE=0;NF_CLE=0;NF_ALE=0;NF_WE=1;NF_WP=1;
NfCommand(0);             //送

读命令
NfAddre(blockadd,pageadd);      //送开始字节地址
NF_RB=1;while(!NF_RB);        //Data Transfer from Cell to Register

max 10us
i=0;
P1=0xff;
do
{
  NF_RE=0;
  DataArray=P1;
  NF_RE=1;
  i++;
}
while(i);

//页数据传送数据完成
NF_CE=1;
}
/*=============================================================================
//参    数: unsigned int blockaddh  2nd 3th的地址 (Row地址)
      unsigned char pageadd  1st的地址   (Column地址)
//函数功能: 页读 PAGE READ OPERATION
      可连续写512个字节
//___没有调试
=============================================================================*/

void ReadPageS(unsigned int blockadd,unsigned char pageadd,select)
{
NF_RE=1;NF_CE=0;NF_CLE=0;NF_ALE=0;NF_WE=1;NF_WP=1;
NfCommand(select);          //送读命令
NfAddre(blockadd,pageadd);      //送开始字节
NF_RB=1;while(!NF_RB);        //Data Transfer from Cell to Register

max 10us
DataPtr+=pageadd;
do
{
  NF_RE=0;
  pageadd++;
  *DataPtr=P1;
  DataPtr++;
  NF_RE=1;
}
while(pageadd<256);

//页数据传送数据完成
NF_CE=1;
}
/*=============================================================================
//参    数: unsigned int blockaddh  2nd 3th的地址 (Row地址)
      unsigned char pageadd  1st的地址   (Column地址)
//函数功能: BYTE READ OPERATION 只读取一个字节
=============================================================================*/

unsigned char ReadByte(unsigned int blockadd,unsigned char pageadd)
{
unsigned char i;
NF_RE=1;NF_CE=0;NF_CLE=0;NF_ALE=0;NF_WE=1;NF_WP=1;
NfCommand(0);             //送

读命令
NfAddre(blockadd,pageadd);      //送开始字节
NF_RB=1;while(!NF_RB);        //Data Transfer from Cell to Register

max 10us
NF_RE=0;
P1=0xff;
i=P1;
NF_RE=1;
NF_CE=1;
return(i);
}
/*=============================================================================
//参    数: unsigned int blockaddh  2nd 3th的地址 (Row地址)
      unsigned char pageadd  1st的地址   (Column地址)
//函数功能: 保留字读 Command input sequence for programming ’C’ area
      只读一个字节
=============================================================================*/

unsigned char ReadSpare(unsigned int blockadd,unsigned char pageadd)
{
unsigned char j;
NF_RE=1;NF_CE=0;NF_CLE=0;NF_ALE=0;NF_WE=1;NF_WP=1;
NfCommand(0x50);

//读C页数据512-527
NfAddre(blockadd,pageadd);      //送开始字节
NF_RB=1;while(!NF_RB);        //Data Transfer from Cell to Register

max 10us
NF_RE=0;
P1=0xff;
j=P1;
NF_RE=1;
NF_CE=1;
return(j);
}