Subversion Repositories xulalx25soc

////////////////////////////////////////////////////////////////////////////////

//

// Filename:    usbi.h

//

// Project:     XuLA2 board

//

// Purpose:     This package attempts to convet a JTAG over USB based

//              communication system into something similar to a serial port

//      based communication system.  Some differences include the fact that,

//      if the USB port isn't polled, nothing comes out of the port.  Hence,

//      on connecting (or polling for the first time) ... there might be a 

//      bunch of stuff to (initially) ignore.

//

//

// Creator:     Dan Gisselquist, Ph.D.

//              Gisselquist Technology, LLC

//

////////////////////////////////////////////////////////////////////////////////

//

// Copyright (C) 2015, Gisselquist Technology, LLC

//

// This program is free software (firmware): you can redistribute it and/or

// modify it under the terms of  the GNU General Public License as published

// by the Free Software Foundation, either version 3 of the License, or (at

// your option) any later version.

//

// This program is distributed in the hope that it will be useful, but WITHOUT

// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// License:     GPL, v3, as defined and found on www.gnu.org,

//              http://www.gnu.org/licenses/gpl.html

//

//

////////////////////////////////////////////////////////////////////////////////

//

//

#ifndef USBI_H

#define USBI_H

#include <libusb.h>

#define VENDOR_ID               0x04d8

#define PRODUCT_ID              0x0ff8c

#define XESS_INTERFACE          0

#define XESS_ENDPOINT_OUT       0x01

#define XESS_ENDPOINT_IN        0x81

#define XESS_ENDPOINT_IN        0x81

//

#define JTAG_CMD        0x4f

#define GET_TDO_MASK    0x01

#define PUT_TMS_MASK    0x02

#define TMS_VAL_MASK    0x04

#define PUT_TDI_MASK    0x08

#define TDI_VAL_MASK    0x10

//

// #define      USER1_INSTR     0x02    // a SIX bit two

#define USB_PKTLEN      32

#define RCV_BUFLEN      512

#define RCV_BUFMASK     (RCV_BUFLEN-1)

#include "llcomms.h"

class   USBI : public LLCOMMSI { // USB Interface

private:

        char    m_rbuf[RCV_BUFLEN];

        char    m_txbuf[2*USB_PKTLEN], m_rxbuf[2*USB_PKTLEN];

        int     m_rbeg, m_rend;

        libusb_context          *m_usb_context;

        libusb_device           **m_usb_dev_list;

        libusb_device_handle    *m_xula_usb_device;

        virtual int     pop_fifo(char *buf, int len);

        virtual void    push_fifo(char *buf, int len);

        virtual void    raw_read(int len, int timeout_ms);

        virtual void    flush_read(void);

public:

        USBI(void);

        virtual void    close(void);

        virtual int     read(char *buf, int len);

        virtual int     read(char *buf, int len, int timeout_ms);

        virtual void    write(char *buf, int len);

        virtual bool    poll(unsigned ms);

};

#endif // USBI_H