/*------------------------------------------------------------------------- * Filename: command.c * Version: $Id: command.c,v 1.4 1999/10/03 22:03:52 erikm Exp $ * Copyright: Copyright (C) 1999, Erik Mouw * Author: Erik Mouw * Description: Command line functions for blob * Created at: Sun Aug 29 17:23:40 1999 * Modified by: Erik Mouw * Modified at: Sun Oct 3 21:08:27 1999 *-----------------------------------------------------------------------*/ /* * command.c: Command line functions for blob * * Copyright (C) 1999 Erik Mouw (J.A.K.Mouw@its.tudelft.nl) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #ident "$Id: command.c,v 1.4 1999/10/03 22:03:52 erikm Exp $" #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "command.h" #include "serial.h" #include "time.h" #include "types.h" /* display a prompt, or the standard prompt if prompt == NULL */ void DisplayPrompt(char *prompt) { if(prompt == NULL) { SerialOutputString(PACKAGE "> "); } else { SerialOutputString(prompt); } } /* more or less like SerialInputString(), but with echo and backspace */ int GetCommand(char *command, int len, int timeout) { u32 startTime, currentTime; char c; int i; int numRead; int maxRead = len - 1; startTime = TimerGetTime(); for(numRead = 0, i = 0; numRead < maxRead;) { /* try to get a byte from the serial port */ while(!SerialInputByte(&c)) { currentTime = TimerGetTime(); /* check timeout value */ if((currentTime - startTime) > (timeout * TICKS_PER_SECOND)) { /* timeout */ command[i++] = '\0'; return(numRead); } } if((c == '\r') || (c == '\n')) { command[i++] = '\0'; /* print newline */ SerialOutputByte('\r'); return(numRead); } else if(c == '\b') { /* FIXME: is this backspace? */ if(i > 0) { i--; numRead--; /* cursor one position back. */ SerialOutputString("\b \b"); } } else { command[i++] = c; numRead++; /* print character */ SerialOutputByte(c); } } return(numRead); }
