firmware/logf.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 by Daniel Stenberg
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  ****************************************************************************/
  19
  20 /*
  21  * logf() logs MAX_LOGF_ENTRY (21) bytes per entry in a circular buffer. Each
  22  * logged string is space- padded for easier and faster output on screen. Just
  23  * output MAX_LOGF_ENTRY characters on each line. MAX_LOGF_ENTRY bytes fit
  24  * nicely on the iRiver remote LCD (128 pixels with an 8x6 pixels font).
  25  */
  26
  27 #include <string.h>
  28 #include <stdio.h>
  29 #include <stdarg.h>
  30 #include "config.h"
  31 #include "lcd-remote.h"
  32 #include "logf.h"
  33 #include "serial.h"
  34
  35 /* Only provide all this if asked to */
  36 #ifdef ROCKBOX_HAS_LOGF
  37
  38 #ifndef __PCTOOL__
  39 unsigned char logfbuffer[MAX_LOGF_LINES][MAX_LOGF_ENTRY];
  40 int logfindex;
  41 bool logfwrap;
  42 #endif
  43
  44 #ifdef HAVE_REMOTE_LCD
  45 static void displayremote(void)
  46 {
  47     /* TODO: we should have a debug option that enables/disables this! */
  48     int w, h;
  49     int lines;
  50     int columns;
  51     int i;
  52     int index;
  53
  54     lcd_remote_getstringsize("A", &w, &h);
  55     lines = LCD_REMOTE_HEIGHT/h;
  56     columns = LCD_REMOTE_WIDTH/w;
  57     lcd_remote_setmargins(0, 0);
  58     lcd_remote_clear_display();
  59
  60     index = logfindex;
  61     for(i = lines-1; i>=0; i--) {
  62         unsigned char buffer[columns+1];
  63
  64         if(--index < 0) {
  65             if(logfwrap)
  66                 index = MAX_LOGF_LINES-1;
  67             else
  68                 break; /* done */
  69         }
  70
  71         memcpy(buffer, logfbuffer[index], columns);
  72         buffer[columns]=0;
  73         lcd_remote_puts(0, i, buffer);
  74     }
  75     lcd_remote_update();
  76 }
  77 #else
  78 #define displayremote()
  79 #endif
  80
  81 #ifdef __PCTOOL__
  82 void _logf(const char *format, ...)
  83 {
  84     char buf[1024];
  85     va_list ap;
  86     va_start(ap, format);
  87
  88     vsnprintf(buf, sizeof buf, format, ap);
  89     printf("DEBUG: %s\n", buf);
  90 }
  91 #else
  92 void _logf(const char *format, ...)
  93 {
  94     int len;
  95     unsigned char *ptr;
  96     va_list ap;
  97     va_start(ap, format);
  98
  99     if(logfindex >= MAX_LOGF_LINES) {
 100         /* wrap */
 101         logfwrap = true;
 102         logfindex = 0;
 103     }
 104     ptr = logfbuffer[logfindex];
 105     len = vsnprintf(ptr, MAX_LOGF_ENTRY, format, ap);
 106 #ifdef HAVE_SERIAL
 107     serial_tx(ptr);
 108     serial_tx("\r\n");
 109 #endif
 110     va_end(ap);
 111     if(len < MAX_LOGF_ENTRY)
 112         /* pad with spaces up to the MAX_LOGF_ENTRY byte border */
 113         memset(ptr+len, ' ', MAX_LOGF_ENTRY-len);
 114
 115     logfindex++; /* leave it where we write the next time */
 116
 117     displayremote();
 118 }
 119 #endif
 120
 121 #endif