/*
    Big console Multimeter and bargraph for METEX M-3850M
    Copyright (C) 2003  Wiesner Thomas

    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

    BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
    FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
    OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
    PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
    OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
    MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
    TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
    PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
    REPAIR OR CORRECTION.
*/

#include <stdio.h>
#include <sys/termios.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include "bigdmm.h"

extern struct termios oldser;
extern int oldline;
extern int sfd;

int main(int argc, char *argv[])
{
	int del, i, j;
	char buf[56];
	float vals[79], max, val;
	char sbuf[7];
	unsigned char curval;

	if(argc != 3) {
		printf("%s device delay (seconds)\n"
				"if delay is 0 seconds, the refresh speed is limited by the DMM\n"
				"Please note, that the time isn't too accurate, because the dmm\n"
				"needs some time to convert and send the value.\n", argv[0]);
		return -1;
	}

	printf(	"BIGDMM version %s\n"
				"Console multimeter link for METEX M-3850M\n"
				"Special characters and colours for Linux terminal\n"
				"Initializing...", VERSION);
	fflush(stdout);
	if((sfd = init_dmm(argv[1])) < 0) {
		printf("Error on opening device\n");
		return -2;
	}
	del = atoi(argv[2]);

	if(signal(SIGINT, abrt) == SIG_ERR) {
		printf("Unable to install signal handler for SIGINT\n");
		return -3;
	}

	for(i = 0; i < 79; i++)	// Initialize array
		vals[i] = 0;
	curval = 0;

	highlight(1);
	setcolor(GREEN);
	for(;;) {
		clrscr();
		if(read_dmm(sfd, buf) >= 0) {
			strncpy(sbuf, buf+3, 6);
			sbuf[7] = '\0';
			val = atof(sbuf);
			if(val < 0)	// Make absolute value
				val = -val;

			// find the correct prefixes (n, u, m, , k, M)
			i = 9;
			while(i < 13 && buf[i] == ' ')	// Read till the first unit char
				i++;
			switch(buf[i]) {
				case 'n':	val /= 1000000000;
					break;
				case 'u':	val /= 1000000;
					break;
				case 'm':	val /= 1000;
					break;
				case 'k':	val *= 1000;
					break;
				case 'M':	val *= 1000000;
					break;
			}

			vals[curval] = val;

			g1(1);	// Special charset on
			bigdig(buf, 3, 8, 1);	// Print value
			putchar('\n');
			bigdig(buf, 9, 14, 0);	// Print units
			g1(0);
			setcolor(YELLOW);
			for(i = 0; i < 56; i++) {
				if(buf[i] != '\r')	// DMM sends \r as seperators ...
					putchar(buf[i]);
				else
					putchar('\t');		// ... map them to \t to fit in one line
			}
			putchar('\n');
			putchar('\n');

			// Find maximum value
			max = 0.01;
			for(i = 0; i < 79; i++) {
				if(vals[i] > max)
					max = vals[i];
			}

			// Draw the graph
			for(j = 0; j < 10; j++) {	// 10 lines
				for(i = 0; i < 80; i++) {	// 80 columns
					if(i == 0) {
						setcolor(WHITE);
						putchar('|');
					} else {
						if(round(vals[i-1]*100/max) >= (9-j)*10 ) {
							if(i-1 == curval)
								setcolor(CYAN);
							else
								setcolor(BLUE);
							g1(1);
							putchar('a');
							g1(0);
						} else
							putchar(' ');
					}
				}
				putchar('\n');
			}
			setcolor(WHITE);
			printf("Max: %.3f;   Time: %d;   Note: Graph values are absolute, CNTRL-C=Exit", max, curval);

			setcolor(GREEN);

			curval++;
			if(curval > 78)
				curval = 0;
		}
		fflush(stdout);
		if(del != 0)
			sleep(del);
	}
	return 0;
}