wt/lm-sensors
1
0 Fork 0
mirror of https://github.com/lm-sensors/lm-sensors.git synced 2026-10-25 12:14:33 +00:00
Code Issues Packages Projects Releases Wiki Activity

New program 'i2cdetect', which scans your i2c bus for connected devices

Browse Source 
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@167 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Frodo Looijaard committed 1999-01-13 21:08:50 +00:00
1 parent 1867246ee0
commit fefbf31867
3 files changed
+180 -2
Download Patch File Download Diff File Expand all files Collapse all files

No files matched your search

prog/detect/i2cdetect.c
+88
View File
@@ -0,0 +1,88 @@
/*
i2cdetect.c - Part of i2cdetect, a user-space program to scan for I2C
devices.
Copyright (c) 1999 Frodo Looijaard <frodol@dds.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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include "src/i2c-dev.h"
void help(void)
{
fprintf(stderr,"Syntax: i2cdetect I2CBUS\n");
}
int main(int argc, char *argv[])
{
char *end;
int i,j,res,i2cbus,file;
char filename[20];
if (argc < 2) {
fprintf(stderr,"Error: No i2c-bus specified!\n");
help();
exit(1);
}
i2cbus = strtol(argv[1],&end,0);
if (*end) {
fprintf(stderr,"Error: First argument not a number!\n");
help();
exit(1);
}
if ((i2cbus < 0) || (i2cbus > 0xff)) {
fprintf(stderr,"Error: I2CBUS argument out of range!\n");
help();
}
sprintf(filename,"/dev/i2c-%d",i2cbus);
if ((file = open(filename,O_RDWR)) < 0) {
fprintf(stderr,"Error: Could not open file `%s': %s\n",filename,
strerror(errno));
exit(1);
}
fprintf(stderr," WARNING! This program can confuse your I2C bus, "
"cause data loss and worse!\n");
fprintf(stderr," I will probe file %s\n", filename);
fprintf(stderr," You have five seconds to reconsider and press CTRL-C!\n\n");
sleep(5);
printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f\n");
for (i = 0; i < 128; i+=16) {
printf("%02x: ",i);
for(j = 0; j < 16; j++) {
if (ioctl(file,I2C_SLAVE,i+j) < 0) {
fprintf(stderr,"Error: Could not set address to %d: %s\n",i+j,
strerror(errno));
exit(1);
}
res = i2c_smbus_read_byte(file);
if (res < 0)
printf("XX ");
else
printf("%02x ",i+j);
}
printf("\n");
}
exit(0);
}
prog/dump/Module.mk
+4 -2
View File
@@ -22,8 +22,10 @@ MODULE_DIR := prog/dump
# Regrettably, even 'simply expanded variables' will not put their currently
# defined value verbatim into the command-list of rules...
PROGDUMPTARGETS := $(MODULE_DIR)/isadump $(MODULE_DIR)/i2cdump
PROGDUMPSOURCES := $(MODULE_DIR)/isadump.c $(MODULE_DIR)/i2cdump.c
PROGDUMPTARGETS := $(MODULE_DIR)/isadump $(MODULE_DIR)/i2cdump \
$(MODULE_DIR)/i2cdetect
PROGDUMPSOURCES := $(MODULE_DIR)/isadump.c $(MODULE_DIR)/i2cdump.c \
$(MODULE_DIR)/i2cdetect.c
# Include all dependency files. We use '.rd' to indicate this will create
# executables.
prog/dump/i2cdetect.c
+88
View File
@@ -0,0 +1,88 @@
/*
i2cdetect.c - Part of i2cdetect, a user-space program to scan for I2C
devices.
Copyright (c) 1999 Frodo Looijaard <frodol@dds.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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include "src/i2c-dev.h"
void help(void)
{
fprintf(stderr,"Syntax: i2cdetect I2CBUS\n");
}
int main(int argc, char *argv[])
{
char *end;
int i,j,res,i2cbus,file;
char filename[20];
if (argc < 2) {
fprintf(stderr,"Error: No i2c-bus specified!\n");
help();
exit(1);
}
i2cbus = strtol(argv[1],&end,0);
if (*end) {
fprintf(stderr,"Error: First argument not a number!\n");
help();
exit(1);
}
if ((i2cbus < 0) || (i2cbus > 0xff)) {
fprintf(stderr,"Error: I2CBUS argument out of range!\n");
help();
}
sprintf(filename,"/dev/i2c-%d",i2cbus);
if ((file = open(filename,O_RDWR)) < 0) {
fprintf(stderr,"Error: Could not open file `%s': %s\n",filename,
strerror(errno));
exit(1);
}
fprintf(stderr," WARNING! This program can confuse your I2C bus, "
"cause data loss and worse!\n");
fprintf(stderr," I will probe file %s\n", filename);
fprintf(stderr," You have five seconds to reconsider and press CTRL-C!\n\n");
sleep(5);
printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f\n");
for (i = 0; i < 128; i+=16) {
printf("%02x: ",i);
for(j = 0; j < 16; j++) {
if (ioctl(file,I2C_SLAVE,i+j) < 0) {
fprintf(stderr,"Error: Could not set address to %d: %s\n",i+j,
strerror(errno));
exit(1);
}
res = i2c_smbus_read_byte(file);
if (res < 0)
printf("XX ");
else
printf("%02x ",i+j);
}
printf("\n");
}
exit(0);
}