/* isbmex.c - model specific routines for SOLA/BASIC Mexico (ISBMEX) models
Copyright (C) 2005 Ricardo Martinezgarza <ricardo@nexxis.com.mx>
Copyright (C) 2002 Edscott Wilson Garcia <edscott@imp.mx>
Copyright (C) 1999 Russell Kroll <rkroll@exploits.org>
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 "main.h"
#include "serial.h"
#include "isbmex.h"
#include <math.h> /* for sqrt */
#include <string.h>
#define xDEBUG
#ifdef DEBUG
#define D(x) x
#else
#define D(x)
#endif
/*#define ENDCHAR '&'*/
#define MAXTRIES 15
/* #define IGNCHARS "" */
float lagrange(unsigned int vbyte)
{
float f0, f1, f2, f3, f4, f5, f6;
float a, b, c, d, e, g, h;
const float x0=144.0, x1=154.0, x2=184.0, x3=195.0, x4=215.0, x5=228.0, x6=249.0;
const float fX0=95.1, fX1=98.3, fX2=112.6, fX3=116.5, fX4=126.0, fX5=131.0, fX6=140.3;
if(vbyte < 144) return 0.0;
f0 = vbyte - x0;
f1 = vbyte - x1;
f2 = vbyte - x2;
f3 = vbyte - x3;
f4 = vbyte - x4;
f5 = vbyte - x5;
f6 = vbyte - x6;
b = (f1 * f2 * f3 * f4 * f5 * f6 * fX0)/((x0 - x1) * (x0 - x2));
b = b / ((x0 - x3) * (x0 - x4));
b = b / ((x0 - x5) * (x0 - x6));
c = (f0 * f2 * f3 * f4 * f5 * f6 * fX1)/((x1 - x0) * (x1 - x2));
c = c / ((x1 - x3) * (x1 - x4));
c = c / ((x1 - x5) * (x1 - x6));
d = (f0 * f1 * f3 * f4 * f5 * f6 * fX2)/((x2 - x0) * (x2 - x1));
d = d / ((x2 - x3) * (x2 - x4));
d = d / ((x2 - x5) * (x2 - x6));
e = (f0 * f1 * f2 * f4 * f5 * f6 * fX3)/((x3 - x0) * (x3 - x1));
e = e / ((x3 - x2) * (x3 - x4));
e = e / ((x3 - x5) * (x3 - x6));
a = (f0 * f1 * f2 * f3 * f5 * f6 * fX4)/((x4 - x0) * (x4 - x1));
a = a / ((x4 - x2) * (x4 - x3));
a = a / ((x4 - x5) * (x4 - x6));
g = (f0 * f1 * f2 * f3 * f4 * f6 * fX5)/((x5 - x0) * (x5 - x1));
g = g / ((x5 - x2) * (x5 - x3));
g = g / ((x5 - x4) * (x5 - x6));
h = (f0 * f1 * f2 * f3 * f4 * f5 * fX6)/((x6 - x0) * (x6 - x1));
h = h / ((x6 - x2) * (x6 - x3));
h = h / ((x6 - x4) * (x6 - x5));
return a + b + c + d + e + g + h;
}
float interpol(float vbytes)
{
const int x[7]={75,83,87,98,103,118,145};
const float f[7]={96.0,102.0,105.0,113.0,116.0,124.0,140.0};
float l[7];
float t, volts;
const int n=6;
int i, j;
if(vbytes < x[0]) return 0.0;
if(vbytes > x[6]) return f[6];
for(i=0; i<=n; i++)
{
if((int)vbytes == x[i]) return f[i];
}
for(i=0; i<=n; i++)
{
l[i] = 1.0;
for(j=0; j<=n; j++)
{
if(j!=i) l[i] *= (float)(x[i] - x[j]);
}
l[i] = f[i] / l[i];
}
t = 1.0;
for(i=0; i<=n; i++) t *= (vbytes - (float)x[i]);
volts = 0.0;
for(i=0; i<=n; i++) volts += (l[i] * t / (vbytes - (float)x[i]));
return volts;
}
void upsdrv_initinfo(void)
{
dstate_setinfo("ups.mfr", "Sola/Basic Mexico");
dstate_setinfo("ups.model", "SR-Inet 280/300/400/480/500/800/1000");
/* high/low voltage */
dstate_setinfo("input.transfer.low", "102.0"); /* defined */
dstate_setinfo("input.transfer.high", "140.0"); /* defined */
dstate_setinfo("output.voltage", "120.0"); /* defined */
/* addinfo(INFO_, "", 0, 0); */
/*printf("Using %s %s on %s\n", getdata(INFO_MFR), getdata(INFO_MODEL), device_path);*/
dstate_setinfo("driver.version.internal", "%s", DRV_VERSION);
}
static const char *getpacket(int *we_know){
fd_set readfds;
struct timeval tv;
int bytes_per_packet=0;
int ret;
static const char *packet_id=NULL;
static char buf[256];
const char *s;
ssize_t r;
bytes_per_packet=*we_know;
D(printf("getpacket with %d\n",bytes_per_packet);)
FD_ZERO(&readfds);
FD_SET(upsfd,&readfds);
/* Wait up to 2 seconds. */
tv.tv_sec = 5;
tv.tv_usec = 0;
ret=select(upsfd+1, &readfds, NULL, NULL, &tv);
if (!ret) {
s="Nothing received from UPS. Check cable conexion";
upslogx(LOG_ERR, "%s", s);
D(printf("%s\n",s);)
return NULL;
}
r=read(upsfd,buf,255);
D(printf("%d bytes read: ",r);)
buf[r]=0;
if (bytes_per_packet && r < bytes_per_packet){
ssize_t rr;
D(printf("short read...\n");)
usleep(500000);
tv.tv_sec = 2;
tv.tv_usec = 0;
ret=select(upsfd+1, &readfds, NULL, NULL, &tv);
if (!ret) return NULL;
rr=read(upsfd,buf+r,255-r);
r += rr;
if (r < bytes_per_packet) return NULL;
}
if (!bytes_per_packet){ /* packet size determination */
/* if (r%10 && r%9) {
printf("disregarding incomplete packet\n");
return NULL;
}*/
if (r%10==0) *we_know=10;
else if (r%9==0) *we_know=9;
return NULL;
}
/* by here we have bytes_per_packet and a complete packet */
/* lets check if within the complete packet we have a valid packet */
if (bytes_per_packet == 10) packet_id="&&&"; else packet_id="***";
s=strstr(buf,packet_id);
/* check validity of packet */
if (!s) {
s="isbmex: no valid packet signature!";
upslogx(LOG_ERR, "%s", s);
D(printf("%s\n",s);)
*we_know=0;
return NULL;
}
D(if (s != buf) printf("overlapping packet received\n");)
if ((int) strlen(s) < bytes_per_packet) {
D(printf("incomplete packet information\n");)
return NULL;
}
#ifdef DEBUG
printf("Got signal:");
{int i;for (i=0;i<strlen(s);i++) printf(" <%d>",(unsigned char)s[i]);}
printf("\n");
#endif
return s;
}
void upsdrv_updateinfo(void)
{
static float high_volt=-1, low_volt=999;
const char *buf=NULL;
char buf2[17];
int i;
static int bytes_per_packet=0;
for (i=0;i<5;i++) {
if ((buf=getpacket(&bytes_per_packet)) != NULL) break;
}
if (!bytes_per_packet || !buf) {
dstate_datastale();
return;
}
/* do the parsing */
{
float in_volt,battpct,acfreq;
double d;
D(printf("parsing (%d bytes per packet)\n",bytes_per_packet);)
/* input voltage :*/
if (bytes_per_packet==9) {
in_volt = lagrange((unsigned char)buf[3]);
} else {
in_volt = interpol(sqrt((float)((unsigned char)buf[3]*256+(unsigned char)buf[4])));
}
snprintf(buf2,16,"%5.1f",in_volt);
D(printf("utility=%s\n",buf2);)
dstate_setinfo("input.voltage", "%s", buf2);
if (in_volt >= high_volt) high_volt=in_volt;
snprintf(buf2,16,"%5.1f",high_volt);
D(printf("highvolt=%s\n",buf2);)
dstate_setinfo("input.voltage.maximum", "%s", buf2);
if (in_volt <= low_volt) low_volt=in_volt;
snprintf(buf2,16,"%5.1f",low_volt);
D(printf("lowvolt=%s\n",buf2);)
dstate_setinfo("input.voltage.minimum", "%s", buf2);
battpct = ((double)((unsigned char)buf[(bytes_per_packet==10)?5:4])-168.0)*(100.0/(215.0-168.0));
snprintf(buf2,16,"%5.1f",battpct);
D(printf("battpct=%s\n",buf2);)
dstate_setinfo("battery.charge", "%s", buf2);
d=(unsigned char)buf[(bytes_per_packet==10)?6:5]*256
+ (unsigned char)buf[(bytes_per_packet==10)?7:6];
acfreq = 1000000/d;
snprintf(buf2,16,"%5.2f",acfreq);
D(printf("acfreq=%s\n",buf2);)
dstate_setinfo("input.frequency", "%s", buf2);
D(printf("status: ");)
status_init();
switch (buf[(bytes_per_packet==10)?8:7]){
case 48: break; /* normal operation */
case 49: D(printf("BOOST ");)
status_set("BOOST");
break;
case 50: D(printf("TRIM ");)
status_set("TRIM");
default: break;
}
switch (buf[(bytes_per_packet==10)?9:8]){
case 48: D(printf("OL ");)
status_set("OL");
break;
case 50: D(printf("LB ");)
status_set("LB");
case 49: D(printf("OB ");)
status_set("OB");
break;
default: break;
}
D(printf("\n");)
status_commit();
}
dstate_dataok();
return;
}
void upsdrv_shutdown(void)
{
/* shutdown is supported on models with
* contact closure. Some ISB models with serial
* support support contact closure, some don't.
* If yours does support it, then a 12V signal
* on pin 9 does the trick (only when ups is
* on OB condition) */
/*
* here try to do the pin 9 trick, if it does not
* work, else:*/
/* fatalx(EXIT_FAILURE, "Shutdown only supported with the Generic Driver, type 6 and special cable"); */
/*fatalx(EXIT_FAILURE, "shutdown not supported");*/
int i, ret;
for(i=0;i<=5;i++)
{
ret = ser_send_char(upsfd, '#');
usleep(50000);
}
}
void upsdrv_help(void)
{
}
/* list flags and values that you want to receive via -x */
void upsdrv_makevartable(void)
{
}
void upsdrv_banner(void)
{
printf("Network UPS Tools - ISBMEX UPS driver %s (%s)\n\n",
DRV_VERSION, UPS_VERSION);
}
void upsdrv_initups(void)
{
upsfd = ser_open(device_path);
ser_set_speed(upsfd, device_path, B9600);
}
void upsdrv_cleanup(void)
{
ser_close(upsfd, device_path);
}
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