Subversion Repositories usb_fpga_2_13

/*!

   mmio -- Memory mapped I/O example for ZTEX USB-FPGA Module 2.16b

   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/.

!*/

#include[ztex-conf.h]   // Loads the configuration macros, see ztex-conf.h for the available macros

#include[ztex-utils.h]  // include basic functions

// configure endpoints 2 and 4, both belong to interface 0 (in/out are from the point of view of the host)

EP_CONFIG(2,0,BULK,IN,512,2);

EP_CONFIG(4,0,BULK,OUT,512,2);

// select ZTEX USB FPGA Module 2.16 as target (required for FPGA configuration)

IDENTITY_UFM_2_16(10.16.0.0,0);

// enables high speed FPGA configuration, (re)use EP 4

ENABLE_HS_FPGA_CONF(4);

// this product string is also used for identification by the host software

#define[PRODUCT_STRING]["memeory mapping example for UFM 1.15"]

__xdata BYTE run;

#define[PRE_FPGA_RESET][PRE_FPGA_RESET

    run = 0;

]

#define[POST_FPGA_CONFIG][POST_FPGA_CONFIG

    IFCONFIG = bmBIT7;          // internel 30MHz clock, drive IFCLK ouput, slave FIFO interface

    SYNCDELAY;

    EP2FIFOCFG = 0;

    SYNCDELAY;

    EP4FIFOCFG = 0;

    SYNCDELAY;

    REVCTL = 0x0;       // reset 

    SYNCDELAY;

    EP2CS &= ~bmBIT0;   // stall = 0

    SYNCDELAY;

    EP4CS &= ~bmBIT0;   // stall = 0

    SYNCDELAY;          // first two packages are waste

    EP4BCL = 0x80;      // skip package, (re)arm EP4

    SYNCDELAY;

    EP4BCL = 0x80;      // skip package, (re)arm EP4

    FIFORESET = 0x80;   // reset FIFO

    SYNCDELAY;

    FIFORESET = 0x82;

    SYNCDELAY;

    FIFORESET = 0x00;

    SYNCDELAY;

    run = 1;

]

// include the main part of the firmware kit, define the descriptors, ...

#include[ztex.h]

__xdata __at 0x5001 volatile BYTE OUT_REG;      // FPGA register where the data is written to

__xdata __at 0x5002 volatile BYTE IN_REG;       // FPGA register where the result is read from

void main(void)

{

    WORD i,size;

// init everything

    init_USB();

    while (1) {

        if ( run & !(EP4CS & bmBIT2) ) {        // EP4 is not empty

            size = (EP4BCH << 8) | EP4BCL;

            if ( size>0 && size<=512 && !(EP2CS & bmBIT3)) {     // EP2 is not full

                for ( i=0; i<size; i++ ) {

                    OUT_REG = EP4FIFOBUF[i];    // data from EP4 is converted to uppercase by the FPGA ...

                    EP2FIFOBUF[i] = IN_REG;     // ... and written back to EP2 buffer

                }

                EP2BCH = size >> 8;

                SYNCDELAY;

                EP2BCL = size & 255;            // arm EP2

                SYNCDELAY;

                INPKTEND = 0x2;

            }

            SYNCDELAY;

            EP4BCL = 0x80;                      // (re)arm EP4

        }

    }

}