serial.cpp

00001 /*
00002 Copyright (C) 2014  Frank Duignan
00003 
00004 This program is free software; you can redistribute it and/or
00005 modify it under the terms of the GNU General Public License
00006 as published by the Free Software Foundation; either version 2
00007 of the License, or (at your option) any later version.
00008 
00009 This program is distributed in the hope that it will be useful,
00010 but WITHOUT ANY WARRANTY; without even the implied warranty of
00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012 GNU General Public License for more details.
00013 
00014 You should have received a copy of the GNU General Public License
00015 along with this program; if not, write to the Free Software
00016 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
00017 */
00018 
00019 #include "mbed.h"
00020 Serial pc(USBTX, USBRX);
00021 void eputc(const char c)
00022 {
00023     pc.putc(c);
00024 }
00025 char egetc()
00026 {
00027     if (pc.readable())
00028         return pc.getc();
00029     else 
00030         return 0;
00031 }
00032 void eputs(const char *String)
00033 {   
00034     while(*String)
00035     {
00036         eputc(*String);
00037         String++;
00038     }
00039 }
00040 
00041 void printString(const char *String)
00042 {
00043     eputs(String);
00044     eputs("\r\n");
00045 }
00046 
00047 char HexDigit(int Value)
00048 {
00049     if ((Value >=0) && (Value < 10))
00050         return Value+'0';
00051     else 
00052         return Value-10 + 'A';
00053 }
00054 void printHex(unsigned int Number)
00055 {
00056     // Output the number over the serial port as
00057     // as hexadecimal string.
00058     char TxString[9];
00059     int Index=8;
00060     TxString[Index]=0; // terminate the string
00061     Index--;
00062     while(Index >=0)
00063     {
00064         TxString[Index]=HexDigit(Number & 0x0f);
00065         Number = Number >> 4;
00066         Index--;
00067     }
00068     eputs(TxString);
00069 }