Subversion Repositories usb_fpga_2_04

/*!

   ucecho -- uppercase conversion example for all EZ-USB devices

   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

// define 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);

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

#define[PRODUCT_STRING]["ucecho for EZ-USB devices"]

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

#include[ztex.h]

void main(void)

{

    WORD i,size;

    BYTE b;

// init everything

    init_USB();

    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

    while (1) {

        if ( !(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++ ) {

                    b = EP4FIFOBUF[i];          // data from EP4 ... 

                    if ( b>=(BYTE)'a' && b<=(BYTE)'z' ) // ... is converted to uppercase ...

                        b-=32;

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

                }

                EP2BCH = size >> 8;

                SYNCDELAY;

                EP2BCL = size & 255;            // arm EP2

            }

            SYNCDELAY;

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

        }

    }

}