mirror of
https://github.com/lm-sensors/lm-sensors
synced 2025-09-05 16:55:45 +00:00
fd545796ee
Changes in sensors.c: sensors_detect now skips addresses which are already taken. Even a force parameter can not override this, as it could lead to major problems. For ISA addresses, the same is done; but the client drivers still need a check if they claim more than one ISA address (as all of the current ISA clients do). Changes in chip drivers: Removed the comment about needing address registration Changes in i2cdetect.c: Marks addresses which are already claimed Changes in sensors-detect: Warns when an address is already claimed, and skips it. git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@667 7894878c-1315-0410-8ee3-d5d059ff63e0
110 lines
2.9 KiB
C
110 lines
2.9 KiB
C
/*
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i2cdetect.c - Part of i2cdetect, a user-space program to scan for I2C
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devices.
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Copyright (c) 1999 Frodo Looijaard <frodol@dds.nl>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <linux/i2c-dev.h>
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void help(void)
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{
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fprintf(stderr,"Syntax: i2cdetect I2CBUS\n");
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}
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int main(int argc, char *argv[])
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{
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char *end;
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int i,j,res,i2cbus,file;
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char filename[20];
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long funcs;
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if (argc < 2) {
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fprintf(stderr,"Error: No i2c-bus specified!\n");
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help();
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exit(1);
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}
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i2cbus = strtol(argv[1],&end,0);
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if (*end) {
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fprintf(stderr,"Error: First argument not a number!\n");
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help();
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exit(1);
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}
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if ((i2cbus < 0) || (i2cbus > 0xff)) {
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fprintf(stderr,"Error: I2CBUS argument out of range!\n");
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help();
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}
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sprintf(filename,"/dev/i2c-%d",i2cbus);
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if ((file = open(filename,O_RDWR)) < 0) {
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fprintf(stderr,"Error: Could not open file `%s': %s\n",filename,
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strerror(errno));
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exit(1);
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}
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if (ioctl(file,I2C_FUNCS,&funcs) < 0) {
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fprintf(stderr,
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"Error: Could not get the adapter functionality maxtrix: %s\n",
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strerror(errno));
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exit(1);
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}
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if (! (funcs & I2C_FUNC_SMBUS_QUICK)) {
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fprintf(stderr,
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"Error: Can't use SMBus Quick Write command "
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"on this bus (ISA bus?)\n");
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exit(1);
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}
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fprintf(stderr," WARNING! This program can confuse your I2C bus, "
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"cause data loss and worse!\n");
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fprintf(stderr," I will probe file %s\n", filename);
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fprintf(stderr," You have five seconds to reconsider and press CTRL-C!\n\n");
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sleep(5);
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printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f\n");
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for (i = 0; i < 128; i+=16) {
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printf("%02x: ",i);
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for(j = 0; j < 16; j++) {
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if (ioctl(file,I2C_SLAVE,i+j) < 0) {
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if (errno == EBUSY) {
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printf("UU ");
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continue;
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} else {
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fprintf(stderr,"Error: Could not set address to %02x: %s\n",i+j,
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strerror(errno));
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exit(1);
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}
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}
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res = i2c_smbus_write_quick(file, I2C_SMBUS_WRITE);
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if (res < 0)
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printf("XX ");
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else
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printf("%02x ",i+j);
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}
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printf("\n");
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}
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exit(0);
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}
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