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92 lines
2.1 KiB
C
92 lines
2.1 KiB
C
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/*! \file input.c \brief User-Input Functions. */
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//*****************************************************************************
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//
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// File Name : 'input.c'
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// Title : User-Input Functions
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// Author : Pascal Stang - Copyright (C) 2003
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// Created : 2003.09.11
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// Revised : 2003.09.11
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// Version : 0.1
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// Target MCU : Atmel AVR series
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// Editor Tabs : 4
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//
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// This code is distributed under the GNU Public License
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// which can be found at http://www.gnu.org/licenses/gpl.txt
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//
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//*****************************************************************************
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//----- Include Files ---------------------------------------------------------
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#include "global.h" // include our global settings
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#ifdef __AVR_ATmega128__
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#include "uart2.h"
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#else
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#include "uart.h"
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#endif
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#include "rprintf.h" // include printf function library
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#include "input.h"
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// globals
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// functions
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u08 inputString(u08 termChar, u08 termLen, u08* data)
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{
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u08 s=0;
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u08 length=0;
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while(length < termLen)
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{
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// get input
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#ifdef __AVR_ATmega128__
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while(!uartReceiveByte(1,&s));
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#else
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while(!uartReceiveByte(&s));
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#endif
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// handle special characters
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if(s == 0x08) // backspace
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{
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if(length > 0)
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{
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// echo backspace-space-backspace
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rprintfChar(0x08);
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rprintfChar(' ');
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rprintfChar(0x08);
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length--;
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}
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}
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else if(s == termChar) // termination character
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{
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// save null-termination
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data[length] = 0;
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break;
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}
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else
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{
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// echo character
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rprintfChar(s);
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// save character
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data[length++] = s;
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}
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}
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return length;
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}
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u08 asciiHexToByte(u08* string)
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{
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// convert 2-byte hex string to byte
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return (asciiHexToNibble(string[0])<<4) + asciiHexToNibble(string[1]);
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}
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u08 asciiHexToNibble(u08 character)
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{
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// convert 1-byte hex ascii character to nibble
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if((character >= 0x30) && (character <= 0x39))
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return character-0x30;
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else if((character >= 'A') && (character <= 'F'))
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return character-'A'+10;
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else if((character >= 'a') && (character <= 'f'))
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return character-'a'+10;
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else return 0;
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}
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