基于MCU的U盘源码实现flash的windos文件系统

#include "d12ci.h"
#include "main.h"
//#include "44b.h"

extern EPPFLAGS bEPPflags;

void outportdata(unsigned char val)
{
DISABLE;

D12_DATA=val;

ENABLE;
}

void outportcmd(unsigned char val)
{
DISABLE;

D12_COMMAND=val;

ENABLE;
}

unsigned char inportb(void)
{
unsigned char c;
DISABLE;
c = D12_DATA;
ENABLE;
return c;
}

void D12_SetAddressEnable(unsigned char bAddress, unsigned char bEnable)
{
 if(bEPPflags.bits.in_isr == 0)
  DISABLE;

 outportcmd(0xD0);
 if(bEnable)
  bAddress |= 0x80;
 outportdata(bAddress);

 if(bEPPflags.bits.in_isr == 0)
  ENABLE;
// Uart_Printf("E D12_SetAddressEnable\n");
}

void D12_SetEndpointEnable(unsigned char bEnable)
{
 if(bEPPflags.bits.in_isr == 0)
  DISABLE;

 outportcmd(0xD8);
 if(bEnable)
  outportdata(1);
 else
  outportdata(0);

 if(bEPPflags.bits.in_isr == 0)
  ENABLE;
// Uart_Printf("E D12_SetEndpointEnable\n");
}

void D12_SetMode(unsigned char bConfig, unsigned char bClkDiv)
{
  if(bEPPflags.bits.in_isr == 0)
  DISABLE;
  outportcmd(0xF3);
  outportdata(bConfig);
  outportdata(bClkDiv);
  if(bEPPflags.bits.in_isr == 0)
   ENABLE;
// Uart_Printf("E D12_SetMode\n");

}

void D12_SetDMA(unsigned char bMode)
{

  if(bEPPflags.bits.in_isr == 0)
    DISABLE;
  outportcmd(0xFB);
  outportdata(bMode);
 if(bEPPflags.bits.in_isr == 0)
  ENABLE;
// Uart_Printf("E D12_SetDMA\n");

}
/*
unsigned char D12_GetDMA(void)
{
 outportcmd(0xFB);
 return(inportb());
}
*/
/*
unsigned char D12_ReadEndpointStatus(unsigned char bEndp)
{
 unsigned char c;

 if(bEPPflags.bits.in_isr == 0)
  DISABLE;

 outportcmd(0x80 + bEndp);
 c = inportb();

 if(bEPPflags.bits.in_isr == 0)
  ENABLE;

 return c;
}
*/
void D12_SetEndpointStatus(unsigned char bEndp, unsigned char bStalled)
{
 if(bEPPflags.bits.in_isr == 0)
  DISABLE;

 outportcmd(0x40 + bEndp);
 outportdata(bStalled);

 if(bEPPflags.bits.in_isr == 0)
  ENABLE;
// Uart_Printf("E D12_SetEndpointStatus\n");
}

/*
void D12_SendResume(void)
{
 outportcmd(0xF6);
}
*/

unsigned char D12_WriteEndpoint(unsigned char endp, unsigned char len, unsigned char * buf)
{
 unsigned char i;

 if(bEPPflags.bits.in_isr == 0)
  DISABLE;
 //---------------------
 outportcmd(endp); //选择端点
 inportb();  //读入满/空状态

 outportcmd(0xF0); //写缓冲区命令
 outportdata(0);
 outportdata(len);

 for(i=0; i  outportdata(*(buf+i));

 outportcmd(0xFA); //驶购冲区有效
 
 //--------------------------------
 if(bEPPflags.bits.in_isr == 0)
  ENABLE;
// Uart_Printf("E D12_WriteEndpoint\n");

 return len;
}
void D12_AcknowledgeEndpoint(unsigned char endp)
{
 outportcmd( endp); //选择端点
 outportcmd(0xF1); //应答设置
 if(endp == 0)
  outportcmd(0xF2); //缓冲区清零
// Uart_Printf("E D12_AcknowledgeEndpoint%d\n",endp);
}
unsigned short D12_ReadInterruptRegister(void)
{
 unsigned char b1;
 unsigned int j;
 //outportb(D12_COMMAND, 0xF4);
 outportcmd(0xF4);
 b1 = inportb();
 j = inportb();
 j <<= 8;
 j += b1;
// if(j) Uart_Printf("E D12_ReadInterruptRegister:%x\n",j);//printf the intterrupt number if it's not zero.
 return j;
}

unsigned char D12_ReadLastTransactionStatus(unsigned char bEndp)
{
 //outportb(D12_COMMAND, 0x40 + bEndp);
 outportcmd(0x40 + bEndp);
// Uart_Printf("E D12_ReadLastTransactionStatus\n");
 return inportb();
}
unsigned char D12_ReadEndpoint(unsigned char endp, unsigned char len, unsigned char * buf)
{
 unsigned char i, j;

 if(bEPPflags.bits.in_isr == 0)
  DISABLE;
 //--------------------------------
 outportcmd(endp);   //选择端点
 if((inportb() & D12_FULLEMPTY) == 0) { //如果缓冲区为空,则返回
  if(bEPPflags.bits.in_isr == 0)
   ENABLE;
  return 0;
 }

 outportcmd(0xF0);   //读缓冲区
 j = inportb();
 j = inportb();

 if(j > len)
  j = len;

 for(i=0; i  *(buf+i) = inportb();

 outportcmd(0xF2);    //缓冲区清空
 //-------------------------------
 if(bEPPflags.bits.in_isr == 0)
  ENABLE;

// Uart_Printf("E D12_ReadEndpoint:%d,%d character read\n",endp,j);
 return j;
}

unsigned char D12_SelectEndpoint(unsigned char bEndp)
{
 unsigned char c;

 if(bEPPflags.bits.in_isr == 0)
  DISABLE;

 outportcmd(bEndp);
 c = inportb();

 if(bEPPflags.bits.in_isr == 0)
  ENABLE;

// Uart_Printf("E D12_SelectEndpoint\n");
 return c;
}