d12.c

44b0x的U盘源代码

#include "d12.h"
#include "usb.h"
#include "MASS_STORAGE.H"

extern CBW cbw;
extern CSW csw;
extern CONTROL_DATA_BUFF Control_Data;
Interrupt_Register_DEF Interrupt_Register;
usb_flags_DEF		usb_flags;
Last_Status_DEF	Last_Status;
//*****************   延时x毫秒函数 ***********
void D12_delay(unsigned int x)                
{
	 unsigned int i;
	 unsigned int j;
	 for(i=0;i<x;i++)
	 for(j=0;j<230;j++);
}
//********************************************


void write_usb_command(unsigned char usb_command)       //写USB命令
{
 	D12Cmd=usb_command;
}

void write_a_usb_data(unsigned char usb_data)        //写一字节USB数据
{
 	D12Dat=usb_data;
}

unsigned char read_a_usb_data(void)                  //读一字节USB数据
{
	 unsigned char temp;
	 temp=D12Dat;
	 return temp;
}


void read_interrupt_register(void)             //读USB中断寄存器
{
	 write_usb_command(Read_Interrupt_Register);
	 Interrupt_Register.Register[0]=read_a_usb_data();
	 Interrupt_Register.Register[1]=read_a_usb_data();
}

void set_usb_addr(unsigned char addr)          //设置USB地址
{
	 write_usb_command(Set_Address);
	 write_a_usb_data(0x80|addr);
}

void set_endpoint_enable(void)                  //端点使能
{
	 write_usb_command(Set_Endpoint_Enable);
	 write_a_usb_data(0x01);
}

unsigned char select_endpoint(unsigned char endp)   //选择终端点
{
	 write_usb_command(Select_EndPoint+endp);
	 return read_a_usb_data();
}

unsigned char  read_last_status(unsigned char endp)   //读端点最后状态
{
	 write_usb_command(Read_Last_Status+endp);
	 return read_a_usb_data();
}

void set_endpoint_status(unsigned char endp,unsigned char status)  //设置端点状态
{
	 write_usb_command(0x40+endp);
	 write_a_usb_data(!status);
}

unsigned char read_endpoint_status(unsigned char endp)           //读端点状态
{
	 write_usb_command(0x80+endp);
	 return read_a_usb_data();
}

void clear_buffer(void)                        //清缓冲，在读取缓冲数据后调用
{
	 write_usb_command(Clear_Buffer);
}

void validate_buffer(void)                    //缓冲区数据有效，在写缓冲后调用
{
	 write_usb_command(Validate_Buffer);
}

void ack_setup(unsigned char endp)            //应答建立包
{
	 select_endpoint(endp);
	 write_usb_command(Ack_Setup);
}

void error(unsigned char number)             //出错处理
{
	// unsigned char Error[]={"ERROR: "};
	// prints(Error);
	// printc(number);
	 number=0;
}

unsigned char read_endpoint_buff(unsigned char endp,unsigned char len,unsigned char * buff)   //读终端点缓冲
{
	 unsigned char i,j;
	 read_last_status(endp);
	 if(!(select_endpoint(endp))&0x01){error(0); return 0;}
	 read_endpoint_status(endp);
	 write_usb_command(Read_Buffer);
	 read_a_usb_data();
	 j=read_a_usb_data();
	 if(j>len)
	  j=len;
	 for(i=0;i<j;i++)
	  {
	   *(buff+i)=read_a_usb_data();
	  }
	 clear_buffer();
	 return j;
}

unsigned char write_endpoint_buff(unsigned char endp,unsigned char len,unsigned char const * buff)    //写终端点缓冲
{
	 unsigned char i;
	 read_last_status(endp);
	 select_endpoint(endp);
	 write_usb_command(Write_Buffer);
	 write_a_usb_data(0);
	 write_a_usb_data(len);
	 for(i=0;i<len;i++)
	  {
	   write_a_usb_data(*(buff+i));
	  }
	 write_a_usb_data(0XFF);
	 validate_buffer();
	 return len;
}

void disconnect_usb(void)
{
	 write_usb_command(0xf3);
	 write_a_usb_data(0x0e);
	 write_a_usb_data(0x47);
	 delay(100);
}

void connect_usb(void)                            //连接USB
{
	 write_usb_command(0xf3);                         //初始化USBD12
	 write_a_usb_data(0x1e);                          //连接USB
	 write_a_usb_data(0x47);                          //设置频率
}

void init_usb(void)                              //初始化USB
{
	 set_usb_addr(0);
	 set_endpoint_enable();
}

void usb_bus_reset(void)                         //USB总线复位处理
{
	// code unsigned char Usb_Bus_Reset[]={"USB BUS RESET"};
	// prints(Usb_Bus_Reset);
	 usb_flags.Register=0;
	 set_endpoint_enable();
	 SCSI.SCSI_Status.Command=1;
	 SCSI.SCSI_Status.Data=0;
	 csw.dCSWSignature=0x55534253;

}

void usb_bus_suspend(void)                       //USB总线挂起处理
{
	// code unsigned char Usb_Bus_Suspend[]={"USB BUS SUSPEND"};
	// prints(Usb_Bus_Suspend);
	// send_to_comport(10);
}

void set_usb_address(void)                       //设置地址
{
	 usb_flags.flags.set_addr=1;
	 while(select_endpoint(1)&0x01);
	 write_endpoint_buff(1,0,0);
	 set_usb_addr(Control_Data.DeviceRequest.wValue);
	 usb_flags.flags.usb_endp0_in=0;
	 usb_flags.flags.setup_packet_out=0;
}

void get_status(unsigned char receiver)           //获取状态响应
{
	 unsigned char status[2];
	 switch (receiver)
	  {
	   case 0:                        //获取设备状态
	    status[0]=0x00;
	    status[1]=0x00;
	    break;
	   case 1:                        //获取接口状态
	    status[0]=0x00;
	    status[0]=0x00;
	    break;
	   case 2:                        //获取端点状态
	    status[0]=0x00;
	    status[1]=0x00;
	    break;
	   }
	  write_endpoint_buff(1,2,status);
	  usb_flags.flags.usb_endp0_in=0;
}

U32 D12RdChipId(void)
{
	U32 tmp;
	
	D12Cmd = 0xfd;
	tmp = D12Dat;
	tmp = tmp<<8|D12Dat;		
	return tmp;	
}