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  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 /*
  23  * logf() logs MAX_LOGF_ENTRY (29) bytes per entry in a circular buffer. Each
  24  * logged string is space- padded for easier and faster output on screen. Just
  25  * output MAX_LOGF_ENTRY characters on each line. MAX_LOGF_ENTRY bytes fit
  26  * nicely on the iRiver remote LCD (128 pixels with an 8x6 pixels font).
  27  *
  28  * When the length of log exceeds MAX_LOGF_ENTRY bytes, dividing into the
  29  * string of length is MAX_LOGF_ENTRY-1 bytes.
  30  *
  31  * logfbuffer[*]:
  32  *
  33  *    |<-   MAX_LOGF_ENTRY bytes   ->|1|
  34  *    | log data area                |T|
  35  *
  36  *  T : log terminate flag
  37  *   == LOGF_TERMINATE_ONE_LINE(0x00)      : log data end (one line)
  38  *   == LOGF_TERMINATE_CONTINUE_LINE(0x01) : log data continues
  39  *   == LOGF_TERMINATE_MULTI_LINE(0x02)    : log data end (multi line)
  40  */
  41
  42 #include <string.h>
  43 #include <stdio.h>
  44 #include <stdarg.h>
  45 #include "config.h"
  46 #include "lcd-remote.h"
  47 #include "logf.h"
  48 #include "serial.h"
  49
  50 #ifdef HAVE_USBSTACK
  51 #include "usb_core.h"
  52 #include "usbstack/usb_serial.h"
  53 #endif
  54
  55 /* Only provide all this if asked to */
  56 #ifdef ROCKBOX_HAS_LOGF
  57
  58 #ifndef __PCTOOL__
  59 unsigned char logfbuffer[MAX_LOGF_LINES][MAX_LOGF_ENTRY+1];
  60 int logfindex;
  61 bool logfwrap;
  62 #endif
  63
  64 #ifdef HAVE_REMOTE_LCD
  65 static void displayremote(void)
  66 {
  67     /* TODO: we should have a debug option that enables/disables this! */
  68     int w, h;
  69     int lines;
  70     int columns;
  71     int i;
  72     int index;
  73
  74     lcd_remote_getstringsize("A", &w, &h);
  75     lines = LCD_REMOTE_HEIGHT/h;
  76     columns = LCD_REMOTE_WIDTH/w;
  77     lcd_remote_clear_display();
  78
  79     index = logfindex;
  80     for(i = lines-1; i>=0; i--) {
  81         unsigned char buffer[columns+1];
  82
  83         if(--index < 0) {
  84             if(logfwrap)
  85                 index = MAX_LOGF_LINES-1;
  86             else
  87                 break; /* done */
  88         }
  89
  90         memcpy(buffer, logfbuffer[index], columns);
  91         buffer[columns]=0;
  92         lcd_remote_puts(0, i, buffer);
  93     }
  94     lcd_remote_update();
  95 }
  96 #else
  97 #define displayremote()
  98 #endif
  99
 100 #ifdef __PCTOOL__
 101 void _logf(const char *format, ...)
 102 {
 103     char buf[1024];
 104     va_list ap;
 105     va_start(ap, format);
 106
 107     vsnprintf(buf, sizeof buf, format, ap);
 108     printf("DEBUG: %s\n", buf);
 109 }
 110 #else
 111 static void check_logfindex(void)
 112 {
 113     if(logfindex >= MAX_LOGF_LINES) {
 114         /* wrap */
 115         logfwrap = true;
 116         logfindex = 0;
 117     }
 118 }
 119
 120 void _logf(const char *format, ...)
 121 {
 122     int len;
 123     int tlen;
 124     unsigned char buf[MAX_LOGF_ONE_LINE_SIZE];
 125     unsigned char *ptr;
 126     va_list ap;
 127     bool multiline = false;
 128
 129     va_start(ap, format);
 130     vsnprintf(buf, MAX_LOGF_ONE_LINE_SIZE, format, ap);
 131     va_end(ap);
 132
 133     len = strlen(buf);
 134 #ifdef HAVE_SERIAL
 135     serial_tx(buf);
 136     serial_tx("\r\n");
 137 #endif
 138 #ifdef USB_SERIAL
 139     usb_serial_send(buf, len);
 140     usb_serial_send("\r\n", 2);
 141 #endif
 142
 143     tlen = 0;
 144     check_logfindex();
 145     while(len > MAX_LOGF_ENTRY)
 146     {
 147         ptr = logfbuffer[logfindex];
 148         strncpy(ptr, buf + tlen, MAX_LOGF_ENTRY-1);
 149         ptr[MAX_LOGF_ENTRY] = LOGF_TERMINATE_CONTINUE_LINE;
 150         logfindex++;
 151         check_logfindex();
 152         len -= MAX_LOGF_ENTRY-1;
 153         tlen += MAX_LOGF_ENTRY-1;
 154         multiline = true;
 155     }
 156     ptr = logfbuffer[logfindex];
 157     strcpy(ptr, buf + tlen);
 158
 159     if(len < MAX_LOGF_ENTRY)
 160         /* pad with spaces up to the MAX_LOGF_ENTRY byte border */
 161         memset(ptr+len, ' ', MAX_LOGF_ENTRY-len);
 162     ptr[MAX_LOGF_ENTRY] = (multiline)?LOGF_TERMINATE_MULTI_LINE:LOGF_TERMINATE_ONE_LINE;
 163
 164     logfindex++; /* leave it where we write the next time */
 165
 166     displayremote();
 167 }
 168 #endif
 169
 170 #endif