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33 pfowler 1 
/* Name: oddebug.c
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 * Project: AVR library
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 * Author: Christian Starkjohann
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 * Creation Date: 2005-01-16
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 * Tabsize: 4
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 * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
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 * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
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 * This Revision: $Id$
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 */
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#include "oddebug.h"
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#if DEBUG_LEVEL > 0
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#warning "Never compile production devices with debugging enabled"
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static void uartPutc(char c)
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{
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    while(!(ODDBG_USR & (1 << ODDBG_UDRE)));    /* wait for data register empty */
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    ODDBG_UDR = c;
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}
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static uchar    hexAscii(uchar h)
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{
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    h &= 0xf;
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    if(h >= 10)
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        h += 'a' - (uchar)10 - '0';
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    h += '0';
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    return h;
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}
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static void printHex(uchar c)
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{
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    uartPutc(hexAscii(c >> 4));
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    uartPutc(hexAscii(c));
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}
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void    odDebug(uchar prefix, uchar *data, uchar len)
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{
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    printHex(prefix);
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    uartPutc(':');
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    while(len--){
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        uartPutc(' ');
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        printHex(*data++);
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    }
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    uartPutc('\r');
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    uartPutc('\n');
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}
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#endif