/* * $Id: oscillograph.c,v 1.2 2003/08/29 03:13:17 casic Exp $ * * oscillograhp.c : draw interface of oscillograph * * Copyright (C) 2003 ynding ( haoanian@263.net ) * * 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 * */#include "lcd.h"#include "color.h"#include "character.h"#include "graphic.h"#include "oscillograph.h"/* draw an interface, which looks like an oscillograph */void draw_interface(void){	int i = 0;	static flag = 0;	if ( flag == 0 ) {		clear_lcd();		++flag;	}	display_string(6, 0, "CASIC Waveform Display", GREEN);	display_string(0, 7, "0", GREEN);	draw_rectangle(10, 20, 260, 220, GREEN);	/* draw vertical dasheds */	for ( i=0;i<9;++i ) {		draw_vdashed(35+i*25, 20, 220, GREEN);	}	/* draw horizontal dasheds */	for ( i=0;i<7;++i ) {		draw_hdashed(10, 260, 45+i*25, GREEN);	}	/* draw vertical scales */	/* left */	draw_vdashed(11, 20, 220, GREEN);	draw_vdashed(12, 20, 220, GREEN);	/* middle */	draw_vdashed(134, 20, 220, GREEN);	draw_vdashed(135, 20, 220, GREEN);	draw_vdashed(136, 20, 220, GREEN);	/* right */	draw_vdashed(258, 20, 220, GREEN);	draw_vdashed(259, 20, 220, GREEN);	/* draw horizontal scales */	/* top */	draw_hdashed(10, 260, 21, GREEN);	draw_hdashed(10, 260, 22, GREEN);	/* middle */	draw_hdashed(10, 260, 119, GREEN);	draw_hdashed(10, 260, 120, GREEN);	draw_hdashed(10, 260, 121, GREEN);	/* bottom */	draw_hdashed(10, 260, 218, GREEN);	draw_hdashed(10, 260, 219, GREEN);	return;}/* convert datas to coordinates */void data2pixel(unsigned char* buf, int count){	unsigned char average = 0;	unsigned char max = 0;	unsigned char min = 0;	int temp = 0;	int i = 0;	/* find out the max & min value */	for ( i=0;i<count;++i ) {		if ( min > buf[i])		       min = buf[i];		if ( max < buf[i])		       max = buf[i];	}	/* calculate the middle value */	average = max/2 + min/2;	/* change data to coordinates */	for ( i=0;i<count;++i ) {		temp = (int)buf[i];		temp -= (int)average;		temp = temp*200/256;		temp = 220 -100 - temp;		buf[i] = (unsigned char)(temp & 0xff);	}	return;}/* erase the waveform pre-drawn */void erase_wave(unsigned char* buf, int count){	int i = 0;	for ( i=0;i<count;++i ) {		draw_bigdot(10+i*5, buf[i], GRAY);	}	return;}/* draw waveform */void draw_wave(unsigned char* buf, int count){	int i = 0;	for ( i=0;i<count;++i ) {		draw_bigdot(10+i*5, buf[i], YELLOW);	}	return;}