lib/eputils.c

   1 /**
   2  * Copyright (C) 2009 Ubixum, Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  17  **/
  18
  19
  20
  21
  22 #include <eputils.h>
  23
  24 #include <fx2regs.h>
  25
  26 #ifdef DEBUG_EPUTILS
  27 #include <stdio.h>
  28 #else
  29 #define printf(...)
  30 #endif
  31
  32 void readep0( BYTE* dst, WORD len) {
  33     WORD read = 0; // n bytes read
  34     BYTE c,avail;
  35     while (read < len) {
  36         EP0BCH = 0;
  37         // NOTE need syncdelay?
  38         EP0BCL = 0; // re-arm ep so host can send more
  39         while (EP0CS & bmEPBUSY);
  40         avail = EP0BCL; // max size fits in one byte (64 bytes)
  41         for (c=0;c<avail;++c)
  42             dst[read+c] = EP0BUF[c];
  43         read += avail;
  44     }
  45 }
  46
  47
  48 void writeep0( BYTE* src, WORD len) {
  49     WORD written = 0;
  50     BYTE c;
  51     while ( written < len ) {
  52         while ( EP0CS & bmEPBUSY ); // wait
  53         for (c=0;c<64 && written<len;++c ) {
  54             EP0BUF[c] = src[written++];
  55         }
  56         EP0BCH = 0;
  57         EP0BCL= c;
  58         printf ( "Write %d bytes\n", c );
  59     }
  60 }