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Looking for DOS USB device driver source code, or examples, or tutorials,... No need for a complete driver, examples are okay, such as: a process of sending and receiving data packets once.

DOS, C language don't know USB, probably need to use assembly.
Great expert, please give unsparing advice!

There are:

http://www.georgpotthast.de/usb/dosusb.htm

This is the USB standard document:

http://www.usb.org/developers/docs/usb_20_040907.zip



Last edited by johnsonlam on 2007-7-4 at 01:03 PM ]

I also want to know, and I'm working hard. Now I understand the basic configuration process of EHCI
//Detect EHCI through PCI configuration space
BYTE SearchEHCI(void)
{
union REGS regs;
int bus, dev, func;
//WORD Did,Vid;
WORD ClassCod,SubClass;
for(bus = 0; bus <= PDI_BUS_MAX; ++bus)
{
for(dev = 0; dev <= PDI_DEVICE_MAX; ++dev)
{
for(func = 0; func <= PDI_FUNCTION_MAX; ++func)
{
UsbHostPciAddr = MK_PDI(bus, dev, func);/* Calculate address */
/* Get vendor ID */
regs.x.ax = 0xB109; // READ CONFIGURATION WORD
regs.x.bx = UsbHostPciAddr;
regs.x.di = 0; // Vendor ID
regs.x.cx = 0xFFFF; // Invalid vendor ID
int86(0x1A, &regs, &regs);

/* Determine if the device exists. FFFFh is an invalid vendor ID */
if (regs.x.cx != 0xFFFF)
{
/* Class Code */
regs.x.ax = 0xB109; // READ CONFIGURATION WORD
regs.x.bx = UsbHostPciAddr;
regs.x.di = 0xA; // Class
int86(0x1A, &regs, &regs);
ClassCod=regs.x.cx;
if(ClassCod==0x0c03) //usb host
{
regs.x.ax = 0xB109; // READ CONFIGURATION WORD
regs.x.bx = UsbHostPciAddr;
regs.x.di = 8; //SubClass
int86(0x1A, &regs, &regs);
SubClass=regs.x.cx;
if((SubClass&0xff00)==0x2000)
return USB_EHCI_CONTROLLER;
}
}
}
}
}
return USB_NULL_CONTROLLER;
}
///*Set base address to 0X000D0000*/
void CfgBaseAddr(void)
{
union REGS regs;
regs.x.ax = 0xB10c; //WRITE CONFIGURATION WORD
regs.x.bx = UsbHostPciAddr;
regs.x.di = 0X10;
regs.x.cx = 0;
int86(0x1A, &regs, &regs);
regs.x.ax = 0xB10c; // WRITE CONFIGURATION WORD
regs.x.bx = UsbHostPciAddr;
regs.x.di = 0X12;
regs.x.cx = 0X000D;
int86(0x1A, &regs, &regs);
}
.........

Dos USB is written in Basic and only supports OHCI and UHCI. Hope the above can benefit the public.

#ifndef TW6USBCOM_H

#define TW6USBCOM_H



#ifndef BYTE

    #define BYTE    unsigned char

#endif



#ifndef WORD

    #define WORD    unsigned short int

#endif



#ifdef __cplusplus

   extern "C" {

#endif



void 	W6USBComReset(void);

WORD    W6USBComDataIn(void);

int     W6USBComDataOut(char *szData, int nCount);

int     W6USBComGetCoding(void);

int     W6USBComSetCoding(void);

int     W6USBComSetState(void);



#ifdef __cplusplus

   }

#endif



#endif

// --------------------------------------------------------------------

// 1. 需在 autoexec.bat 下啟動 USBDOS.COM

// 2. 設計文件請參考 USBDOS 的 Home Page 或 USBDOS\SAMPLES

// 3. USBDOS.COM 內定 InterruptVector = 0x65

// 4. USBDOS.COM /D 可啟動偵錯模式 (USBDOS.LOG)

// 5. urb.status bit 定義如下 :

// Bit 0: Reserved, 

// Bit 1: Bitstuff error 

// Bit 2: CRC/Timeout 

// Bit 3: NAK

// Bit 4: Babble detected 

// Bit 5: Data Buffer error 

// Bit 6: Stalled

// Bit 7: Active

// Ex.	88 hex means a NAK received, since the active bit is set the data

//      packet can be retried, 44 hex means a CRC/Timeout error which caused a stall.

//      The device may need a reset.

//      The OHCI controller returns different completion codes than the UHCI

//      controller. To simplify driver development, the DOSUSB driver translates the

//      OHCI completion codes to UHCI status codes. However, in the dosusb.log file

//      the OHCI codes are specified.

//      OHCI completion code 1 is translated to 44h, 2 to 42h, 3 to 44h, 4 to 40h,

//      5,6 and 7 to 44h, 8 to 50h, 9 to 00h, 12 to 20h, 13 to A0h and 14 to 88h.

// --------------------------------------------------------------------



#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

#include <signal.h>



#include "USBCom.h"



#define __PACKED__	__attribute__ ((packed))



#define C4USBInterruptVector	0x65



int gnDevAdd		=1;

int gnInEndpoint	=3;

int gnOutEndpoint	=2;



typedef struct

{

	BYTE  transaction_token __PACKED__ ;

	BYTE  chain_end_flag  	__PACKED__ ;

	BYTE  dev_add 			__PACKED__ ;

	BYTE  end_point 		__PACKED__ ;

	BYTE  error_code 		__PACKED__ ;

	BYTE  status 			__PACKED__ ;

	WORD  transaction_flags __PACKED__ ;

	WORD  buffer_off 		__PACKED__ ;  

	WORD  buffer_seg 		__PACKED__ ;  

	WORD  buffer_length 	__PACKED__ ;  

	WORD  actual_length 	__PACKED__ ;  

	WORD  setup_buffer_off 	__PACKED__ ; 

	WORD  setup_buffer_seg 	__PACKED__ ; 

	WORD  start_frame 		__PACKED__ ;  

	WORD  nr_of_packets 	__PACKED__ ;  

	BYTE  int_interval 		__PACKED__ ;  

	BYTE  error_count 		__PACKED__ ;  

	WORD  timeout 			__PACKED__ ;  

	WORD  next_urb_off 		__PACKED__ ;  

	WORD  next_urb_seg 		__PACKED__ ;  

} TURBType;



typedef struct

{

	BYTE bmRequestType	__PACKED__; 

	BYTE bRequest		__PACKED__; 

	WORD wValue			__PACKED__; 

	WORD wIndex			__PACKED__; 

	WORD wLength		__PACKED__; 

}  TDeviceRequest;



char	gszUSBDataIn;



//*************************************************************************************************

int main(int argc, char *argv)

{

    #ifndef ALLEGRO_MINGW32

	    int     i, n, k;

	    int     nInEndpoint;

	    char	szData;



		if(!__djgpp_nearptr_enable()) 

		{

			printf("!__djgpp_nearptr_enable()");

			return(0);

		}		

	    

	    if(W6USBComSetCoding()!=0) 	return(0);

	    if(W6USBComGetCoding()!=0) 	return(0);

	    if(W6USBComSetState()!=0) 	return(0);



	    printf("Simple TTY-Terminal at 38.400 baud - press ESC to exit\n");



	    nInEndpoint   	= gnInEndpoint;

	    gnInEndpoint  	= 1;

	    if( (n= W6USBComDataIn())>0 )

	    {

		    printf("Line status in hex: \n");

		    for(i=0;i<2;i++)

		    {

		        printf("%.2X ",gszUSBDataIn);

		    }

	    }	    

	    gnInEndpoint=nInEndpoint;



	    for(k=0;k<30;k++)

	    {

	        // 接收內容

	        if((n=W6USBComDataIn())>0)

	        {

	            printf("urb.actual_length = %d\n", n);

	            for(i=0;i<n;i++) printf("%c", gszUSBDataIn);

	            printf("\n");

	        }



			szData = 'A';

			szData = 0x00;

	        W6USBComDataOut(szData,1);          // 送出 'A'

	        delay(1000);

	    }

	#else

		return(0);

    #endif

}





// *************************************************************************************************

WORD W6USBComDataIn()

{

    #ifndef ALLEGRO_MINGW32

		__dpmi_regs  	regs;

		TURBType		urb;

	        

	    // set up in request

	    urb.transaction_token	=0x69;

	    urb.chain_end_flag		=0;

	    urb.dev_add				=gnDevAdd;

	    urb.end_point			=gnInEndpoint;

	    urb.error_code			=0;

	    urb.status				=0;

	    urb.transaction_flags	=0;

	    urb.buffer_seg			=(__tb+64) >> 4;			// __tb 定義在 go32.h 為一個1024K內實體記錄位址

	    urb.buffer_off			=(__tb+64) &  0x0F;

	    urb.buffer_length		=64;

	    urb.actual_length		=64;

	    urb.setup_buffer_off	=0;

	    urb.setup_buffer_seg	=0;

	    urb.start_frame			=0;

	    urb.nr_of_packets		=0;

	    urb.int_interval		=0;

	    urb.error_count			=0;

	    urb.timeout				=0;

	    urb.next_urb_off		=0;

	    urb.next_urb_seg		=0;



		// 將 urb 填入 __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);



	    // registor : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

	    regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

	    __dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI



		// 將 __tb 回傳的資料填到 urb

	    dosmemget (__tb, sizeof(urb), (char *)&urb);  



		// invalid device address?

		if (urb.error_code==1) 	return(0);



		// transaction error?

		if(urb.status > 1)		return(0);		



		// 將 __tb 回傳的資料填到 gszUSBDataIn

		if(urb.actual_length>0) dosmemget (__tb+64, urb.actual_length, gszUSBDataIn); 



		return(urb.actual_length);

	#else

		return(0);

    #endif

}



// 0 : success

// 1 : Invalid device address

// 2 : transaction error?

int W6USBComDataOut(char *szData, int nCount)

{

    #ifndef ALLEGRO_MINGW32

		__dpmi_regs 	regs;

		TURBType		urb;

		char			szTmp;



		// 把 szData 的資料指定到 __tb+64 位置

		if(nCount==0) nCount=strlen(szData);

		if(nCount==0) return(0);





		dosmemput(szData, nCount, __tb+64);

		

		// outputs data in buffer

		// set up out request

		urb.transaction_token	=0xE1;

		urb.chain_end_flag		=0;

		urb.dev_add				=gnDevAdd;

		urb.end_point			=gnOutEndpoint;

		urb.error_code			=0;

		urb.status				=0;

		urb.transaction_flags	=0;

	    urb.buffer_seg			=(__tb+64) >> 4;			// __tb 定義在 go32.h 為一個1024K內實體記錄位址

	    urb.buffer_off			=(__tb+64) &  0x0F;

		urb.buffer_length		=nCount;

		urb.actual_length		=64;

		urb.setup_buffer_off	=0;

		urb.setup_buffer_seg	=0;

		urb.start_frame			=0;

		urb.nr_of_packets		=0;

		urb.int_interval		=0;

		urb.error_count			=0;

		urb.timeout				=0;

		urb.next_urb_off		=0;

		urb.next_urb_seg		=0;



		// 將 urb 填入 __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);



	    // registor : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

	    regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

	    __dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI



		// 將 __tb 回傳的資料填到 urb

	    dosmemget (__tb, sizeof(urb), (char *)&urb);  



		// invalid device address?

		if (urb.error_code==1) 	return(urb.error_code);



		// transaction error?

		if(urb.status > 1)		return(urb.status);



	    return(0);

	#else

		return(0);

    #endif

}



// 0 : success

// 1 : Invalid device address

// 2 : transaction error?

int W6USBComGetCoding()

{

    #ifndef ALLEGRO_MINGW32

		__dpmi_regs  	regs;

		TDeviceRequest	device_request;

		TURBType		urb;



		device_request.bmRequestType=0xA1;

		device_request.bRequest		=0x21;

		device_request.wValue		=0x00;

		device_request.wIndex		=0;

		device_request.wLength		=0x7;



		// 把 device_request 的資料指定到 __tb+128 位置

		dosmemput((char *)&device_request, sizeof(device_request), __tb+128);



		// set up get Line Coding request

		urb.transaction_token	=0x2D;

		urb.chain_end_flag		=0;

		urb.dev_add				=gnDevAdd;

		urb.end_point			=0;

		urb.error_code			=0;

		urb.status				=0;

		urb.transaction_flags	=0;

	    urb.buffer_seg			=(__tb+64) >> 4;			// __tb 定義在 go32.h 為一個1024K內實體記錄位址

	    urb.buffer_off			=(__tb+64) &  0x0F;

		urb.buffer_length		=18;

		urb.actual_length		=64;

		urb.setup_buffer_seg	=(__tb+128) >> 4;			// device_request segment

		urb.setup_buffer_off	=(__tb+128) &  0x0F;		// device_request offset

		urb.start_frame			=0;

		urb.nr_of_packets		=0;

		urb.int_interval		=0;

		urb.error_count			=0;

		urb.timeout				=0;

		urb.next_urb_seg		=0;

		urb.next_urb_off		=0;



		// 將 urb 填入 __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);	



	    // registor : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

	    regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

	    __dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI



		// 將 __tb 回傳的資料填到 urb

	    dosmemget (__tb, sizeof(urb), (char *)&urb);  

		

		// invalid device address?

		if (urb.error_code==1) 	return(urb.error_code);



		// transaction error?

		if(urb.status > 1)		return(urb.status);



	    return(0);

	#else

		return(0);

    #endif



}



// 0 : success

// 1 : Invalid device address

// 2 : transaction error?

int W6USBComSetCoding()

{

    #ifndef ALLEGRO_MINGW32

		__dpmi_regs  	regs;

	    int 			nInEndpoint;

	    int 			nOutEndpoint;

	    char			szData;

	    int				nDataLen;

		TDeviceRequest  device_request;

		TURBType		urb;    

	        

		device_request.bmRequestType=0x21;

		device_request.bRequest	=0x20;

		device_request.wValue	=0x00;

		device_request.wIndex	=0;

		device_request.wLength	=0x7;



		// 把 device_request 的資料指定到 __tb+128 位置

		dosmemput((char *)&device_request, sizeof(device_request), __tb+128);



		// set up get Line Coding request

		urb.transaction_token	=0x2D;

		urb.chain_end_flag		=0;

		urb.dev_add				=gnDevAdd;

		urb.end_point			=0;

		urb.error_code			=0;

		urb.status				=0;

		urb.transaction_flags	=0;

		urb.buffer_seg			=0; //varseg(buffer)

		urb.buffer_off			=0; //varptr(buffer)

		urb.buffer_length		=0;

		urb.actual_length		=0;

		urb.setup_buffer_seg	=(__tb+128) >> 4;			// device_request segment

		urb.setup_buffer_off	=(__tb+128) &  0x0F;		// device_request offset

		urb.start_frame			=0;

		urb.nr_of_packets		=0;

		urb.int_interval		=0;

		urb.error_count			=0;

		urb.timeout				=0;

		urb.next_urb_seg		=0;

		urb.next_urb_off		=0;



		// 將 urb 填入 __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);

		

		// registor : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

	    regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

		__dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI



		// 將 __tb 回傳的資料填到 urb

	    dosmemget (__tb, sizeof(urb), (char *)&urb);  



		// invalid device address?

		if (urb.error_code==1) 	return(urb.error_code);



		// transaction error?

		if(urb.status > 1)		return(urb.status);



		// now send line coding structure - 38400 baud 8-N-1

		nInEndpoint = gnInEndpoint;

		nOutEndpoint= gnOutEndpoint;

		// 0x1C200	=115200

		// 0xE100	=57600

		// 0x9600	=38400

		// 0x4B00	=19200

		// 0x2580	=9600

		// 0x12C0	=4800

		// 0x0960	=2400

		// 0x04B0	=1200

		// --> chr$(0x00)+chr$(0x96) = 0x9600 (little endian) = 38400 baud

		// --> chr$(8) = 8bit

		szData 		= 0x00;

		szData 		= 0x96;

		szData 		= 0x00;

		szData 		= 0x00;

		szData 		= 0x00;

		szData 		= 0x00;

		szData 		= 0x08;

		nDataLen		= 7;



		gnOutEndpoint 	= 0;

		W6USBComDataOut(szData, nDataLen);



		gnInEndpoint	= 0;

		W6USBComDataIn();



		gnInEndpoint    = nInEndpoint;

		gnOutEndpoint   = nOutEndpoint;



		return(0);

	#else

		return(0);

    #endif

}



// 0 : success

// 1 : Invalid device address

// 2 : transaction error?

int W6USBComSetState()

{

    #ifndef ALLEGRO_MINGW32

        __dpmi_regs  	regs;

		TDeviceRequest  device_request;

		TURBType		urb;

    

		device_request.bmRequestType=0x21;

		device_request.bRequest		=0x22;

		device_request.wValue		=0x03;

		device_request.wIndex		=0;

		device_request.wLength		=0x00



		// 把 device_request 的資料指定到 __tb+128 位置

		dosmemput((char *)&device_request, sizeof(device_request), __tb+128);



		// set up request

		urb.transaction_token	=0x2D;

		urb.chain_end_flag		=0;

		urb.dev_add				=gnDevAdd;

		urb.end_point			=0;

		urb.error_code			=0;

		urb.status				=0;

		urb.transaction_flags	=0;

		urb.buffer_seg			=(__tb+64) >> 4;

		urb.buffer_off			=(__tb+64) &  0x0F;

		urb.buffer_length		=0;

		urb.actual_length		=0;

		urb.setup_buffer_seg	=(__tb+128) >> 4;			// device_request segment

		urb.setup_buffer_off	=(__tb+128) &  0x0F;		// device_request offset

		urb.start_frame			=0;

		urb.nr_of_packets		=0;

		urb.int_interval		=0;

		urb.error_count			=0;

		urb.timeout				=0;

		urb.next_urb_seg		=0;

		urb.next_urb_off		=0;



		// 將 urb 填入 __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);

	

		// registor : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

    	regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

		__dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI



		// 將 __tb 回傳的資料填到 urb

    	dosmemget (__tb, sizeof(urb), (char *)&urb);  



		// invalid device address?

		if (urb.error_code==1) 	return(urb.error_code);



		// transaction error?

		if(urb.status > 1)		return(urb.status);



		// success

		return(0);

	#else

		return(0);

    #endif



}



void W6USBComReset()

{

    #ifndef ALLEGRO_MINGW32

        __dpmi_regs  	regs;

		TURBType		urb;

    

		// set up request

		urb.transaction_token	=0xFF;						// 0xFF 為 Reset token (參考 USBDOS.htm)

		urb.chain_end_flag		=0;

		urb.dev_add				=gnDevAdd;					// 0 : 表全部

		urb.end_point			=0;

		urb.error_code			=0;

		urb.status				=0;

		urb.transaction_flags	=0;

		urb.buffer_seg			=0;

		urb.buffer_off			=0;

		urb.buffer_length		=0;

		urb.actual_length		=0;

		urb.setup_buffer_seg	=0;		

		urb.setup_buffer_off	=0;		

		urb.start_frame			=0;

		urb.nr_of_packets		=0;

		urb.int_interval		=0;

		urb.error_count			=0;

		urb.timeout				=0;

		urb.next_urb_seg		=0;

		urb.next_urb_off		=0;



		// 將 urb 填入 __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);

		

		// registor : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

		regs.x.ax = 1;										// 1 : Reset command (USBDOS.HTM)

    	regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

		__dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI

    #endif

}





int W6USBComDeviceDescriptor()

{

    #ifndef ALLEGRO_MINGW32

        __dpmi_regs  	regs;

		TDeviceRequest  device_request;

		TURBType		urb;

    

		device_request.bmRequestType	= 0x80;

		device_request.bRequest 		= 6;

		device_request.wValue 			= 0x100;

		device_request.wIndex 			= 0;

		device_request.wLength 			= 8;



		// 把 device_request 的資料指定到 __tb+128 位置

		dosmemput((char *)&device_request, sizeof(device_request), __tb+128);



		// set up request

		urb.transaction_token	=0x2D;

		urb.chain_end_flag		=0;

		urb.dev_add				=gnDevAdd;

		urb.end_point			=0;

		urb.error_code			=0;

		urb.status				=0;

		urb.transaction_flags	=0;

		urb.buffer_seg			=(__tb+64) >> 4;

		urb.buffer_off			=(__tb+64) &  0x0F;

		urb.buffer_length		=8;

		urb.actual_length		=8;

		urb.setup_buffer_seg	=(__tb+128) >> 4;			// device_request segment

		urb.setup_buffer_off	=(__tb+128) &  0x0F;		// device_request offset

		urb.start_frame			=0;

		urb.nr_of_packets		=0;

		urb.int_interval		=0;

		urb.error_count			=0;

		urb.timeout				=0;

		urb.next_urb_seg		=0;

		urb.next_urb_off		=0;



		// 將 urb 填入 __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);

	

		// registor : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

    	regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

		__dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI



		// 將 __tb 回傳的資料填到 urb

    	dosmemget (__tb, sizeof(urb), (char *)&urb);  



		// invalid device address?

		if (urb.error_code==1) 	return(urb.error_code);



		// transaction error?

		if(urb.status > 1)		return(urb.status);



		// 將 __tb 回傳的資料填到 gszUSBDataIn

		if(urb.actual_length>0) dosmemget (__tb+64, urb.actual_length, gszUSBDataIn); 



		// 會回應 8 個 BYTES

		printf("\n\nDevice Descriptor:");

		printf("\nLength:                %d",			gszUSBDataIn);

		printf("\nDescriptor type:       %d",			gszUSBDataIn);

		printf("\nUSB specification nr.: %02X%02X hex",	gszUSBDataIn,gszUSBDataIn);

		printf("\nClass code:            %d",			gszUSBDataIn);

		printf("\nSubclass code:         %d",			gszUSBDataIn);

		printf("\nProtocol code:         %d",			gszUSBDataIn);

		printf("\nMax Packet size:       %d\n",			gszUSBDataIn);

	

		// success

		return(0);

	#else

		return(0);

    #endif

}

Development environment uses DJGPP + FreeDOS + DPMI + DOSUSB driver (http://www.dosusb.net)

Please refer to the forum content in http://www.dosusb.net. Different USB CHIPs are not guaranteed to be successful,

But in my environment, the SOURCE CODE I wrote is OK


File name: W6USBCOM.h

#ifndef TW6USBCOM_H

#define TW6USBCOM_H



#ifndef BYTE

    #define BYTE    unsigned char

#endif



#ifndef WORD

    #define WORD    unsigned short int

#endif



#ifdef __cplusplus

   extern "C" {

#endif



void 	W6USBComReset(void);

WORD    W6USBComDataIn(void);

int     W6USBComDataOut(char *szData, int nCount);

int     W6USBComGetCoding(void);

int     W6USBComSetCoding(void);

int     W6USBComSetState(void);



#ifdef __cplusplus

   }

#endif



#endif

File name: W6USBCOM.C

// --------------------------------------------------------------------

// 1. USBDOS.COM needs to be started in autoexec.bat

// 2. For design files, please refer to the Home Page of USBDOS or USBDOS\SAMPLES

// 3. USBDOS.COM has the default InterruptVector = 0x65

// 4. USBDOS.COM /D can start the debug mode (USBDOS.LOG)

// 5. Definition of urb.status bit is as follows:

// Bit 0: Reserved, 

// Bit 1: Bitstuff error 

// Bit 2: CRC/Timeout 

// Bit 3: NAK

// Bit 4: Babble detected 

// Bit 5: Data Buffer error 

// Bit 6: Stalled

// Bit 7: Active

// Ex.	88 hex means a NAK received, since the active bit is set the data

//      packet can be retried, 44 hex means a CRC/Timeout error which caused a stall.

//      The device may need a reset.

//      The OHCI controller returns different completion codes than the UHCI

//      controller. To simplify driver development, the DOSUSB driver translates the

//      OHCI completion codes to UHCI status codes. However, in the dosusb.log file

//      the OHCI codes are specified.

//      OHCI completion code 1 is translated to 44h, 2 to 42h, 3 to 44h, 4 to 40h,

//      5,6 and 7 to 44h, 8 to 50h, 9 to 00h, 12 to 20h, 13 to A0h and 14 to 88h.

// --------------------------------------------------------------------



#include <stdlib.h>

#include <stdio.h>

#include <conio.h>

#include <signal.h>



#include "USBCom.h"



#define __PACKED__	__attribute__ ((packed))



#define C4USBInterruptVector	0x65



int gnDevAdd		=1;

int gnInEndpoint	=3;

int gnOutEndpoint	=2;



typedef struct

{

	BYTE  transaction_token __PACKED__ ;

	BYTE  chain_end_flag  	__PACKED__ ;

	BYTE  dev_add 			__PACKED__ ;

	BYTE  end_point 		__PACKED__ ;

	BYTE  error_code 		__PACKED__ ;

	BYTE  status 			__PACKED__ ;

	WORD  transaction_flags __PACKED__ ;

	WORD  buffer_off 		__PACKED__ ;  

	WORD  buffer_seg 		__PACKED__ ;  

	WORD  buffer_length 	__PACKED__ ;  

	WORD  actual_length 	__PACKED__ ;  

	WORD  setup_buffer_off 	__PACKED__ ; 

	WORD  setup_buffer_seg 	__PACKED__ ; 

	WORD  start_frame 		__PACKED__ ;  

	WORD  nr_of_packets 	__PACKED__ ;  

	BYTE  int_interval 		__PACKED__ ;  

	BYTE  error_count 		__PACKED__ ;  

	WORD  timeout 			__PACKED__ ;  

	WORD  next_urb_off 		__PACKED__ ;  

	WORD  next_urb_seg 		__PACKED__ ;  

} TURBType;



typedef struct

{

	BYTE bmRequestType	__PACKED__; 

	BYTE bRequest		__PACKED__; 

	WORD wValue			__PACKED__; 

	WORD wIndex			__PACKED__; 

	WORD wLength		__PACKED__; 

}  TDeviceRequest;



char	gszUSBDataIn;



//*************************************************************************************************

int main(int argc, char *argv)

{

    #ifndef ALLEGRO_MINGW32

	    int     i, n, k;

	    int     nInEndpoint;

	    char	szData;



		if(!__djgpp_nearptr_enable()) 

		{

			printf("!__djgpp_nearptr_enable()");

			return(0);

		}		

	    

	    if(W6USBComSetCoding()!=0) 	return(0);

	    if(W6USBComGetCoding()!=0) 	return(0);

	    if(W6USBComSetState()!=0) 	return(0);



	    printf("Simple TTY-Terminal at 38.400 baud - press ESC to exit\n");



	    nInEndpoint   	= gnInEndpoint;

	    gnInEndpoint  	= 1;

	    if( (n= W6USBComDataIn())>0 )

	    {

		    printf("Line status in hex: \n");

		    for(i=0;i<2;i++)

		    {

		        printf("%.2X ",gszUSBDataIn);

		    }

	    }	    

	    gnInEndpoint=nInEndpoint;



	    for(k=0;k<30;k++)

	    {

	        // Receive content

	        if((n=W6USBComDataIn())>0)

	        {

	            printf("urb.actual_length = %d\n", n);

	            for(i=0;i<n;i++) printf("%c", gszUSBDataIn);

	            printf("\n");

	        }



			szData = 'A';

			szData = 0x00;

	        W6USBComDataOut(szData,1);          // Send 'A'

	        delay(1000);

	    }

	#else

		return(0);

    #endif

}





// *************************************************************************************************

WORD W6USBComDataIn()

{

    #ifndef ALLEGRO_MINGW32

		__dpmi_regs  	regs;

		TURBType		urb;

	        

	    // set up in request

	    urb.transaction_token	=0x69;

	    urb.chain_end_flag		=0;

	    urb.dev_add				=gnDevAdd;

	    urb.end_point			=gnInEndpoint;

	    urb.error_code			=0;

	    urb.status				=0;

	    urb.transaction_flags	=0;

	    urb.buffer_seg			=(__tb+64) >> 4;			// __tb is defined in go32.h as a physical address record within 1024K

	    urb.buffer_off			=(__tb+64) &  0x0F;

	    urb.buffer_length		=64;

	    urb.actual_length		=64;

	    urb.setup_buffer_off	=0;

	    urb.setup_buffer_seg	=0;

	    urb.start_frame			=0;

	    urb.nr_of_packets		=0;

	    urb.int_interval		=0;

	    urb.error_count			=0;

	    urb.timeout				=0;

	    urb.next_urb_off		=0;

	    urb.next_urb_seg		=0;



		// Fill urb into __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);



	    // Register : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

	    regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

	    __dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI



		// Fill the data returned by __tb into urb

	    dosmemget (__tb, sizeof(urb), (char *)&urb);  



		// invalid device address?

		if (urb.error_code==1) 	return(0);



		// transaction error?

		if(urb.status > 1)		return(0);		



		// Fill the data returned by __tb into gszUSBDataIn

		if(urb.actual_length>0) dosmemget (__tb+64, urb.actual_length, gszUSBDataIn); 



		return(urb.actual_length);

	#else

		return(0);

    #endif

}



// 0 : success

// 1 : Invalid device address

// 2 : transaction error?

int W6USBComDataOut(char *szData, int nCount)

{

    #ifndef ALLEGRO_MINGW32

		__dpmi_regs 	regs;

		TURBType		urb;

		char			szTmp;



		// Specify the data of szData to the __tb+64 position

		if(nCount==0) nCount=strlen(szData);

		if(nCount==0) return(0);





		dosmemput(szData, nCount, __tb+64);

		

		// outputs data in buffer

		// set up out request

		urb.transaction_token	=0xE1;

		urb.chain_end_flag		=0;

		urb.dev_add				=gnDevAdd;

		urb.end_point			=gnOutEndpoint;

		urb.error_code			=0;

		urb.status				=0;

		urb.transaction_flags	=0;

	    urb.buffer_seg			=(__tb+64) >> 4;			// __tb is defined in go32.h as a physical address record within 1024K

	    urb.buffer_off			=(__tb+64) &  0x0F;

		urb.buffer_length		=nCount;

		urb.actual_length		=64;

		urb.setup_buffer_off	=0;

		urb.setup_buffer_seg	=0;

		urb.start_frame			=0;

		urb.nr_of_packets		=0;

		urb.int_interval		=0;

		urb.error_count			=0;

		urb.timeout				=0;

		urb.next_urb_off		=0;

		urb.next_urb_seg		=0;



		// Fill urb into __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);



	    // Register : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

	    regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

	    __dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI



		// Fill the data returned by __tb into urb

	    dosmemget (__tb, sizeof(urb), (char *)&urb);  



		// invalid device address?

		if (urb.error_code==1) 	return(urb.error_code);



		// transaction error?

		if(urb.status > 1)		return(urb.status);



	    return(0);

	#else

		return(0);

    #endif

}



// 0 : success

// 1 : Invalid device address

// 2 : transaction error?

int W6USBComGetCoding()

{

    #ifndef ALLEGRO_MINGW32

		__dpmi_regs  	regs;

		TDeviceRequest	device_request;

		TURBType		urb;



		device_request.bmRequestType=0xA1;

		device_request.bRequest		=0x21;

		device_request.wValue		=0x00;

		device_request.wIndex		=0;

		device_request.wLength		=0x7;



		// Specify the data of device_request to the __tb+128 position

		dosmemput((char *)&device_request, sizeof(device_request), __tb+128);



		// set up get Line Coding request

		urb.transaction_token	=0x2D;

		urb.chain_end_flag		=0;

		urb.dev_add				=gnDevAdd;

		urb.end_point			=0;

		urb.error_code			=0;

		urb.status				=0;

		urb.transaction_flags	=0;

	    urb.buffer_seg			=(__tb+64) >> 4;			// __tb is defined in go32.h as a physical address record within 1024K

	    urb.buffer_off			=(__tb+64) &  0x0F;

		urb.buffer_length		=18;

		urb.actual_length		=64;

		urb.setup_buffer_seg	=(__tb+128) >> 4;			// device_request segment

		urb.setup_buffer_off	=(__tb+128) &  0x0F;		// device_request offset

		urb.start_frame			=0;

		urb.nr_of_packets		=0;

		urb.int_interval		=0;

		urb.error_count			=0;

		urb.timeout				=0;

		urb.next_urb_seg		=0;

		urb.next_urb_off		=0;



		// Fill urb into __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);	



	    // Register : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

	    regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

	    __dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI



		// Fill the data returned by __tb into urb

	    dosmemget (__tb, sizeof(urb), (char *)&urb);  

		

		// invalid device address?

		if (urb.error_code==1) 	return(urb.error_code);



		// transaction error?

		if(urb.status > 1)		return(urb.status);



	    return(0);

	#else

		return(0);

    #endif



}



// 0 : success

// 1 : Invalid device address

// 2 : transaction error?

int W6USBComSetCoding()

{

    #ifndef ALLEGRO_MINGW32

		__dpmi_regs  	regs;

	    int 			nInEndpoint;

	    int 			nOutEndpoint;

	    char			szData;

	    int				nDataLen;

		TDeviceRequest  device_request;

		TURBType		urb;    

	        

		device_request.bmRequestType=0x21;

		device_request.bRequest	=0x20;

		device_request.wValue	=0x00;

		device_request.wIndex	=0;

		device_request.wLength	=0x7;



		// Specify the data of device_request to the __tb+128 position

		dosmemput((char *)&device_request, sizeof(device_request), __tb+128);



		// set up get Line Coding request

		urb.transaction_token	=0x2D;

		urb.chain_end_flag		=0;

		urb.dev_add				=gnDevAdd;

		urb.end_point			=0;

		urb.error_code			=0;

		urb.status				=0;

		urb.transaction_flags	=0;

		urb.buffer_seg			=0; //varseg(buffer)

		urb.buffer_off			=0; //varptr(buffer)

		urb.buffer_length		=0;

		urb.actual_length		=0;

		urb.setup_buffer_seg	=(__tb+128) >> 4;			// device_request segment

		urb.setup_buffer_off	=(__tb+128) &  0x0F;		// device_request offset

		urb.start_frame			=0;

		urb.nr_of_packets		=0;

		urb.int_interval		=0;

		urb.error_count			=0;

		urb.timeout				=0;

		urb.next_urb_seg		=0;

		urb.next_urb_off		=0;



		// Fill urb into __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);

		

		// Register : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

	    regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

		__dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI



		// Fill the data returned by __tb into urb

	    dosmemget (__tb, sizeof(urb), (char *)&urb);  



		// invalid device address?

		if (urb.error_code==1) 	return(urb.error_code);



		// transaction error?

		if(urb.status > 1)		return(urb.status);



		// now send line coding structure - 38400 baud 8-N-1

		nInEndpoint = gnInEndpoint;

		nOutEndpoint= gnOutEndpoint;

		// 0x1C200	=115200

		// 0xE100	=57600

		// 0x9600	=38400

		// 0x4B00	=19200

		// 0x2580	=9600

		// 0x12C0	=4800

		// 0x0960	=2400

		// 0x04B0	=1200

		// --> chr$(0x00)+chr$(0x96) = 0x9600 (little endian) = 38400 baud

		// --> chr$(8) = 8bit

		szData 		= 0x00;

		szData 		= 0x96;

		szData 		= 0x00;

		szData 		= 0x00;

		szData 		= 0x00;

		szData 		= 0x00;

		szData 		= 0x08;

		nDataLen		= 7;



		gnOutEndpoint 	= 0;

		W6USBComDataOut(szData, nDataLen);



		gnInEndpoint	= 0;

		W6USBComDataIn();



		gnInEndpoint    = nInEndpoint;

		gnOutEndpoint   = nOutEndpoint;



		return(0);

	#else

		return(0);

    #endif

}



// 0 : success

// 1 : Invalid device address

// 2 : transaction error?

int W6USBComSetState()

{

    #ifndef ALLEGRO_MINGW32

        __dpmi_regs  	regs;

		TDeviceRequest  device_request;

		TURBType		urb;

    

		device_request.bmRequestType=0x21;

		device_request.bRequest		=0x22;

		device_request.wValue		=0x03;

		device_request.wIndex		=0;

		device_request.wLength		=0x00



		// Specify the data of device_request to the __tb+128 position

		dosmemput((char *)&device_request, sizeof(device_request), __tb+128);



		// set up request

		urb.transaction_token	=0x2D;

		urb.chain_end_flag		=0;

		urb.dev_add				=gnDevAdd;

		urb.end_point			=0;

		urb.error_code			=0;

		urb.status				=0;

		urb.transaction_flags	=0;

		urb.buffer_seg			=(__tb+64) >> 4;

		urb.buffer_off			=(__tb+64) &  0x0F;

		urb.buffer_length		=0;

		urb.actual_length		=0;

		urb.setup_buffer_seg	=(__tb+128) >> 4;			// device_request segment

		urb.setup_buffer_off	=(__tb+128) &  0x0F;		// device_request offset

		urb.start_frame			=0;

		urb.nr_of_packets		=0;

		urb.int_interval		=0;

		urb.error_count			=0;

		urb.timeout				=0;

		urb.next_urb_seg		=0;

		urb.next_urb_off		=0;



		// Fill urb into __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);

	

		// Register : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

    	regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

		__dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI



		// Fill the data returned by __tb into urb

    	dosmemget (__tb, sizeof(urb), (char *)&urb);  



		// invalid device address?

		if (urb.error_code==1) 	return(urb.error_code);



		// transaction error?

		if(urb.status > 1)		return(urb.status);



		// success

		return(0);

	#else

		return(0);

    #endif



}



void W6USBComReset()

{

    #ifndef ALLEGRO_MINGW32

        __dpmi_regs  	regs;

		TURBType		urb;

    

		// set up request

		urb.transaction_token	=0xFF;						// 0xFF is Reset token (refer to USBDOS.htm)

		urb.chain_end_flag		=0;

		urb.dev_add				=gnDevAdd;					// 0 : means all

		urb.end_point			=0;

		urb.error_code			=0;

		urb.status				=0;

		urb.transaction_flags	=0;

		urb.buffer_seg			=0;

		urb.buffer_off			=0;

		urb.buffer_length		=0;

		urb.actual_length		=0;

		urb.setup_buffer_seg	=0;		

		urb.setup_buffer_off	=0;		

		urb.start_frame			=0;

		urb.nr_of_packets		=0;

		urb.int_interval		=0;

		urb.error_count			=0;

		urb.timeout				=0;

		urb.next_urb_seg		=0;

		urb.next_urb_off		=0;



		// Fill urb into __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);

		

		// Register : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

		regs.x.ax = 1;										// 1 : Reset command (USBDOS.HTM)

    	regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

		__dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI

    #endif

}





int W6USBComDeviceDescriptor()

{

    #ifndef ALLEGRO_MINGW32

        __dpmi_regs  	regs;

		TDeviceRequest  device_request;

		TURBType		urb;

    

		device_request.bmRequestType	= 0x80;

		device_request.bRequest 		= 6;

		device_request.wValue 			= 0x100;

		device_request.wIndex 			= 0;

		device_request.wLength 			= 8;



		// Specify the data of device_request to the __tb+128 position

		dosmemput((char *)&device_request, sizeof(device_request), __tb+128);



		// set up request

		urb.transaction_token	=0x2D;

		urb.chain_end_flag		=0;

		urb.dev_add				=gnDevAdd;

		urb.end_point			=0;

		urb.error_code			=0;

		urb.status				=0;

		urb.transaction_flags	=0;

		urb.buffer_seg			=(__tb+64) >> 4;

		urb.buffer_off			=(__tb+64) &  0x0F;

		urb.buffer_length		=8;

		urb.actual_length		=8;

		urb.setup_buffer_seg	=(__tb+128) >> 4;			// device_request segment

		urb.setup_buffer_off	=(__tb+128) &  0x0F;		// device_request offset

		urb.start_frame			=0;

		urb.nr_of_packets		=0;

		urb.int_interval		=0;

		urb.error_count			=0;

		urb.timeout				=0;

		urb.next_urb_seg		=0;

		urb.next_urb_off		=0;



		// Fill urb into __tb

		dosmemput((char *)&urb, sizeof(urb), __tb);

	

		// Register : Flags = 0: AX = 1: BX = 2: CX = 3: DX = 4: SI = 5: DI = 6 BP = 7: DS = 8: ES = 9

    	regs.x.ds = __tb >> 4;

	    regs.x.dx = __tb &  0x0F;

		__dpmi_int (C4USBInterruptVector, &regs);           // call DosUHCI



		// Fill the data returned by __tb into urb

    	dosmemget (__tb, sizeof(urb), (char *)&urb);  



		// invalid device address?

		if (urb.error_code==1) 	return(urb.error_code);



		// transaction error?

		if(urb.status > 1)		return(urb.status);



		// Fill the data returned by __tb into gszUSBDataIn

		if(urb.actual_length>0) dosmemget (__tb+64, urb.actual_length, gszUSBDataIn); 



		// will respond 8 BYTES

		printf("\n\nDevice Descriptor:");

		printf("\nLength:                %d",			gszUSBDataIn);

		printf("\nDescriptor type:       %d",			gszUSBDataIn);

		printf("\nUSB specification nr.: %02X%02X hex",	gszUSBDataIn,gszUSBDataIn);

		printf("\nClass code:            %d",			gszUSBDataIn);

		printf("\nSubclass code:         %d",			gszUSBDataIn);

		printf("\nProtocol code:         %d",			gszUSBDataIn);

		printf("\nMax Packet size:       %d\n",			gszUSBDataIn);

	

		// success

		return(0);

	#else

		return(0);

    #endif

}

Still learning. There are so many things here...
What is DOS USB programming about?
Still don't understand after looking.