?? usb.c
字號:
union //端點最后處理狀態
{
unsigned char Register;
struct
{
unsigned char successful :1;
unsigned char error_code :4;
unsigned char setup_packet :1;
unsigned char data_1 :1;
unsigned char prestatus_not_read :1;
}Status;
}Last_Status;
//***************** 延時x毫秒函數 ***********
void 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) //寫USB命令
{
USB_A0=USB_COMMAND_ADD;
USB_DATA=usb_command;
USB_WR=0;
USB_WR=1;
USB_DATA=0xFF;
}
void write_a_usb_data(unsigned char usb_data) //寫一字節USB數據
{
USB_A0=USB_DATA_ADD;
USB_DATA=usb_data;
USB_WR=0;
USB_WR=1;
USB_DATA=0XFF;
}
unsigned char read_a_usb_data(void) //讀一字節USB數據
{
unsigned char temp;
USB_A0=USB_DATA_ADD;
USB_RD=0;
temp=USB_DATA;
USB_RD=1;
return temp;
}
void read_interrupt_register(void) //讀USB中斷寄存器
{
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) //設置USB地址
{
write_usb_command(Set_Address);
write_a_usb_data(0x80|addr);
}
void set_endpoint_enable(void) //端點使能
{
write_usb_command(Set_Endpoint_Enable);
write_a_usb_data(0x01);
}
unsigned char select_endpoint(unsigned char endp) //選擇終端點
{
write_usb_command(Select_EndPoint+endp);
return read_a_usb_data();
}
unsigned char read_last_status(unsigned char endp) //讀端點最后狀態
{
write_usb_command(Read_Last_Status+endp);
return read_a_usb_data();
}
void set_endpoint_status(unsigned char endp,unsigned char status) //設置端點狀態
{
write_usb_command(0x40+endp);
write_a_usb_data(!status);
}
unsigned char read_endpoint_status(unsigned char endp) //讀端點狀態
{
write_usb_command(0x80+endp);
return read_a_usb_data();
}
void clear_buffer(void) //清緩沖，在讀取緩沖數據后調用
{
write_usb_command(Clear_Buffer);
}
void validate_buffer(void) //緩沖區數據有效，在寫緩沖后調用
{
write_usb_command(Validate_Buffer);
}
void ack_setup(unsigned char endp) //應答建立包
{
select_endpoint(endp);
write_usb_command(Ack_Setup);
}
void error(unsigned char number) //出錯處理
{
// unsigned char Error[]={"ERROR: "};
// prints(Error);
// printc(number);
number=0;
}
unsigned char read_endpoint_buff(unsigned char endp,unsigned char len,unsigned char * buff) //讀終端點緩沖
{
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++)
{
USB_RD=0;
*(buff+i)=USB_DATA;
USB_RD=1;
}
clear_buffer();
return j;
}
unsigned char write_endpoint_buff(unsigned char endp,unsigned char len,unsigned char * buff) //寫終端點緩沖
{
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++)
{
USB_DATA=*(buff+i);
USB_WR=0;
USB_WR=1;
}
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) //連接USB
{
write_usb_command(0xf3); //初始化USBD12
write_a_usb_data(0x1e); //連接USB
write_a_usb_data(0x47); //設置頻率
}
void init_usb(void) //初始化USB
{
set_usb_addr(0);
set_endpoint_enable();
}
void usb_bus_reset(void) //USB總線復位處理
{
// code unsigned char Usb_Bus_Reset[]={"USB BUS RESET"};
// prints(Usb_Bus_Reset);
usb_flags.Register=0;
set_endpoint_enable();
SCSI.Status.Command=1;
SCSI.Status.Data=0;
csw.dCSWSignature=0x55534253;
}
void usb_bus_suspend(void) //USB總線掛起處理
{
// code unsigned char Usb_Bus_Suspend[]={"USB BUS SUSPEND"};
// prints(Usb_Bus_Suspend);
// send_to_comport(10);
}
void set_usb_address(void) //設置地址
{
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) //獲取狀態響應
{
unsigned char status[2];
switch (receiver)
{
case 0: //獲取設備狀態
status[0]=0x00;
status[1]=0x00;
break;
case 1: //獲取接口狀態
status[0]=0x00;
status[0]=0x00;
break;
case 2: //獲取端點狀態
status[0]=0x00;
status[1]=0x00;
break;
}
write_endpoint_buff(1,2,status);
usb_flags.flags.usb_endp0_in=0;
}
void clear_feature(unsigned char receiver)
{
receiver=0;
write_endpoint_buff(1,0,0);
usb_flags.flags.usb_endp0_in=0;
usb_flags.flags.setup_packet_out=0;
}
void set_feature(unsigned char receiver)
{
receiver=0;
write_endpoint_buff(1,0,0);
usb_flags.flags.usb_endp0_in=0;
usb_flags.flags.setup_packet_out=0;
}
void set_descriptor(void)
{
usb_flags.flags.usb_endp0_in=0;
usb_flags.flags.setup_packet_out=0;
}
void set_configuration(void)
{
write_endpoint_buff(1,0,0);
usb_flags.flags.usb_endp0_in=0;
usb_flags.flags.setup_packet_out=0;
}
void get_configuration(void) //獲取配置狀態
{
unsigned char value=0x01;
write_endpoint_buff(1,1,&value);
usb_flags.flags.usb_endp0_in=0;
}
void set_interface(void) //設置接口
{
write_endpoint_buff(1,0,0);
usb_flags.flags.usb_endp0_in=0;
usb_flags.flags.setup_packet_out=0;
}
void get_interface(void) //獲取接口狀態
{
unsigned char value=0x01;
write_endpoint_buff(1,1,&value);
usb_flags.flags.usb_endp0_in=0;
}
void get_max_LUN(void) //獲取磁盤最大邏輯單元號
{
unsigned char max_LUN=MAX_LUN; //只有一個邏輯單元
write_endpoint_buff(1,1,&(max_LUN));
usb_flags.flags.usb_endp0_in=0;
}
void mass_storage_reset(void) //USB大容量存儲設備復位
{
write_endpoint_buff(1,0,0);
usb_flags.flags.usb_endp0_in=0;
usb_flags.flags.setup_packet_out=0;
SCSI.Status.Command=1;
SCSI.Status.Data=0;
}
void get_descriptor(void) //獲取描述符
{
if(!usb_flags.flags.not_end)
{
switch(MSB(Control_Data.DeviceRequest.wValue))
{
case DEVICE_DESCRIPTOR:
Control_Data.wCount=sizeof(DEVICE_DESCRIPTOR_STRUCT);
Control_Data.pData=(unsigned char *)(&device_descriptor);
break;
case CONFIGURATION_DESCRIPTOR:
Control_Data.wCount=SWAP(con_int_endp_descriptor.configuration_descriptor.wTotalLength);
Control_Data.pData=(unsigned char *)(&con_int_endp_descriptor);
if(Control_Data.wLength<Control_Data.wCount)Control_Data.wCount=Control_Data.wLength;
break;
case STRING_DESCRIPTOR:
if(LSB(Control_Data.DeviceRequest.wValue)==0)
{
Control_Data.wCount=LANGUAGE_ID[0];
Control_Data.pData=LANGUAGE_ID;
}
if(LSB(Control_Data.DeviceRequest.wValue)==2)
{
Control_Data.wCount=device_serial_number[0];
Control_Data.pData=device_serial_number;
}
break;
}
if(Control_Data.wLength<Control_Data.wCount)Control_Data.wCount=Control_Data.wLength;
}
if(Control_Data.wCount>=MAX_CONTROL_DATA_SIZE)
{
write_endpoint_buff(1,MAX_CONTROL_DATA_SIZE,Control_Data.pData);
Control_Data.pData+=MAX_CONTROL_DATA_SIZE;
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