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[/] [usb_fpga_1_11/] [trunk/] [examples/] [all/] [ucecho/] [ucecho.c] - Blame information for rev 2

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1 2 ZTEX
/*!
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   ucecho -- uppercase conversion example for all EZ-USB devices
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   Copyright (C) 2009-2010 ZTEX e.K.
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   http://www.ztex.de
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License version 3 as
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   published by the Free Software Foundation.
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   This program is distributed in the hope that it will be useful, but
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   WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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   General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, see http://www.gnu.org/licenses/.
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!*/
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#include[ztex-conf.h]   // Loads the configuration macros, see ztex-conf.h for the available macros
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#include[ztex-utils.h]  // include basic functions
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// define endpoints 2 and 4, both belong to interface 0 (in/out are from the point of view of the host)
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EP_CONFIG(2,0,BULK,IN,512,2);
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EP_CONFIG(4,0,BULK,OUT,512,2);
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// this product string is also used for identification by the host software
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#define[PRODUCT_STRING]["ucecho for EZ-USB devices"]
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// include the main part of the firmware kit, define the descriptors, ...
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#include[ztex.h]
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void main(void)
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{
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    WORD i,size;
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    BYTE b;
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// init everything
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    init_USB();
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    EP2CS &= ~bmBIT0;   // stall = 0
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    SYNCDELAY;
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    EP4CS &= ~bmBIT0;   // stall = 0
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    SYNCDELAY;          // first two packages are waste
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    EP4BCL = 0x80;      // skip package, (re)arm EP4
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    SYNCDELAY;
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    EP4BCL = 0x80;      // skip package, (re)arm EP4
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    while (1) {
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        if ( !(EP4CS & bmBIT2) ) {                              // EP4 is not empty
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            size = (EP4BCH << 8) | EP4BCL;
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            if ( size>0 && size<=512 && !(EP2CS & bmBIT3)) {     // EP2 is not full
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                for ( i=0; i<size; i++ ) {
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                    b = EP4FIFOBUF[i];          // data from EP4 ... 
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                    if ( b>='a' && b<='z' )     // ... is converted to uppercase ...
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                        b-=32;
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                    EP2FIFOBUF[i] = b;          // ... and written back to EP2 buffer
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                }
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                EP2BCH = size >> 8;
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                SYNCDELAY;
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                EP2BCL = size & 255;            // arm EP2
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            }
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            SYNCDELAY;
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            EP4BCL = 0x80;                      // skip package, (re)arm EP4
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        }
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    }
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}
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