Subversion Repositories usb_fpga_2_13

/*!

   ZTEX Firmware Kit for EZ-USB FX2 Microcontrollers

   Copyright (C) 2009-2014 ZTEX GmbH.

   http://www.ztex.de

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License version 3 as

   published by the Free Software Foundation.

   This program is distributed in the hope that it will be useful, but

   WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

   General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program; if not, see http://www.gnu.org/licenses/.

!*/

/*

    FPGA support for ZTEX USB FPGA Modules 2.01 and 2.04

*/

#ifndef[ZTEX_FPGA_H]

#define[ZTEX_FPGA_H]

#define[@CAPABILITY_FPGA;]

__xdata BYTE fpga_checksum;         // checksum

__xdata DWORD fpga_bytes;           // transfered bytes

__xdata BYTE fpga_init_b;           // init_b state (should be 222 after configuration)

__xdata BYTE fpga_flash_result;     // result of automatic fpga configuarion from Flash

__xdata BYTE fpga_conf_initialized; // 123 if initialized

__xdata BYTE OOEA;

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

   ***** reset_fpga ****************************************************

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

static void reset_fpga () {

    OEE = (OEE & ~bmBIT6) | bmBIT7;

    IOE = IOE & ~bmBIT7;

    wait(1);

    IOE = IOE | bmBIT7;

    fpga_conf_initialized = 0;

}

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

   ***** init_fpga *****************************************************

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

static void init_fpga () {

    IOE = IOE | bmBIT7;

    OEE = (OEE & ~bmBIT6) | bmBIT7;

    if ( ! (IOE & bmBIT6) ) {

        // ensure that FPGA is in a proper configuration mode

        IOE = IOE & ~bmBIT7;                    // PROG_B = 0

        OEA = (OEA & bmBIT2 ) | bmBIT4 | bmBIT5 | bmBIT6;

        IOA = (IOA & bmBIT2 ) | bmBIT5;

        wait(1);

        IOE = IOE | bmBIT7;                     // PROG_B = 1

    }

    fpga_conf_initialized = 0;

}

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

   ***** init_fpga_configuration ***************************************

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

static void init_fpga_configuration () {

    unsigned short k;

    {

        PRE_FPGA_RESET

    }

    IFCONFIG = bmBIT7;

    SYNCDELAY;

    PORTACFG = 0;

    PORTCCFG = 0;

    OOEA = OEA;

    fpga_conf_initialized = 123;

    OEA &= bmBIT2;                      // only unsed PA bit

    OEE = (OEE & ~bmBIT6) | bmBIT7;

    IOE = IOE & ~bmBIT7;                // PROG_B = 0

    //     CSI      M0       M1       RDWR

    OEA |= bmBIT1 | bmBIT4 | bmBIT5 | bmBIT6;

    IOA = ( IOA & bmBIT2 ) | bmBIT1 | bmBIT5;

    wait(5);

    IOE = IOE | bmBIT7;                 // PROG_B = 1

    IOA1 = 0;                            // CS = 0

    k=0;

    while (!IOA7 && k<65535)

        k++;

    //     CCLK 

    OEA |= bmBIT0;                      // ready for configuration

    fpga_init_b = IOA7 ? 200 : 100;

    fpga_bytes = 0;

    fpga_checksum = 0;

}

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

   ***** post_fpga_confog **********************************************

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

static void post_fpga_config () {

    POST_FPGA_CONFIG

}

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

   ***** finish_fpga_configuration *************************************

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

static void finish_fpga_configuration () {

    BYTE w;

    fpga_init_b += IOA7 ? 22 : 11;

    for ( w=0; w<64; w++ ) {

        IOA0 = 1; IOA0 = 0;

    }

    IOA1 = 1;

    IOA0 = 1; IOA0 = 0;

    IOA0 = 1; IOA0 = 0;

    IOA0 = 1; IOA0 = 0;

    IOA0 = 1; IOA0 = 0;

    OEA = OOEA;

    if ( IOE & bmBIT6 )  {

        post_fpga_config();

    }

}

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

   ***** EP0 vendor request 0x30 ***************************************

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

ADD_EP0_VENDOR_REQUEST((0x30,,          // get FPGA state

    MEM_COPY1(fpga_checksum,EP0BUF+1,7);

    OEE = (OEE & ~bmBIT6) | bmBIT7;

    if ( IOE & bmBIT6 )  {

        EP0BUF[0] = 0;                    // FPGA configured 

    }

    else {

        EP0BUF[0] = 1;                   // FPGA unconfigured 

        reset_fpga();                   // prepare FPGA for configuration

     }

//    EP0BUF[8] = 0;                    // bit order for bitstream in Flash memory: non-swapped

    EP0BUF[8] = 1;                      // bit order for bitstream in Flash memory: swapped

    EP0BCH = 0;

    EP0BCL = 9;

,,));;

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

   ***** EP0 vendor command 0x31 ***************************************

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

ADD_EP0_VENDOR_COMMAND((0x31,,reset_fpga();,,));;       // reset FPGA

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

   ***** EP0 vendor command 0x32 ***************************************

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

void fpga_send_ep0() {

    BYTE oOEC;

    oOEC = OEC;

    OEC = 255;

    fpga_bytes += ep0_payload_transfer;

    __asm

        mov     dptr,#_EP0BCL

        movx    a,@dptr

        jz      010000$

        mov     r2,a

        mov     _AUTOPTRL1,#(_EP0BUF)

        mov     _AUTOPTRH1,#(_EP0BUF >> 8)

        mov     _AUTOPTRSETUP,#0x07

        mov     dptr,#_fpga_checksum

        movx    a,@dptr

        mov     r1,a

        mov     dptr,#_XAUTODAT1

010001$:

        movx    a,@dptr                 // 2

        mov     _IOC,a                  // 2

        setb    _IOA0                   // 2

        add     a,r1                    // 1

        mov     r1,a                    // 1

        clr     _IOA0                   // 2

        djnz    r2, 010001$             // 4

        mov     dptr,#_fpga_checksum

        mov     a,r1

        movx    @dptr,a

010000$:

        __endasm;

    OEC = oOEC;

    if ( EP0BCL<64 ) {

        finish_fpga_configuration();

    }

}

ADD_EP0_VENDOR_COMMAND((0x32,,          // send FPGA configuration data

    if ( fpga_conf_initialized != 123 )

        init_fpga_configuration();

,,

    fpga_send_ep0();

));;

#ifeq[FLASH_BITSTREAM_ENABLED][1]

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

   ***** fpga_configure_from_flash *************************************

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

/*

    Configure the FPGA using a bitstream from flash.

    If force == 0 a already configured FPGA is not re-configured.

    Return values:

        1 : FPGA already configured

        4 : Configuration error

*/

BYTE fpga_configure_from_flash( BYTE force ) {

//    BYTE c,d;

    WORD i;

    if ( ( force == 0 ) && ( IOE & bmBIT6 ) ) {

        fpga_flash_result = 1;

        return 1;

    }

    fpga_flash_result = 0;

    IFCONFIG = bmBIT7;

    SYNCDELAY;

    PORTACFG = 0;

    PORTCCFG = 0;

//    c = OEA;

    OEA &= bmBIT2;                      // only unsed PA bit

//    d = OEC;

    OEC &= ~bmBIT0;

    OEE = (OEE & ~bmBIT6) | bmBIT7;

    IOE = IOE & ~bmBIT7;                // PROG_B = 0

    //     M0       M1

    OEA |= bmBIT4 | bmBIT5;

    IOA = ( IOA & bmBIT2 ) | bmBIT4;

    wait(1);

    IOE = IOE | bmBIT7;                 // PROG_B = 1

// wait up to 4s for CS going high

    wait(20);

    for (i=0; IOA7 && (!IOA1) && i<4000; i++ ) {

        wait(1);

    }

    wait(1);

    if ( IOE & bmBIT6 )  {

//      IOA = ( IOA & bmBIT2 ) | bmBIT3;

        post_fpga_config();

//      OEC = d;

//      OEA = c;

    }

    else {

        init_fpga();

        fpga_flash_result = 4;

    }

    return fpga_flash_result;

}

#include[ztex-fpga-flash2.h]

#endif

#endif  /*ZTEX_FPGA_H*/