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Let the user specify a register range. 

git-svn-id: http://lm-sensors.org/svn/i2c-tools/trunk@5151 7894878c-1315-0410-8ee3-d5d059ff63e0
tags/v3.0.1
Jean Delvare 18 years ago
parent
53115213c6
commit
8e4ddd1f56
3 changed files with 83 additions and 4 deletions
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  1. 1
      CHANGES
  2. 6
      tools/i2cdump.8
  3. 80
      tools/i2cdump.c

1
CHANGES
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@ -10,6 +10,7 @@ SVN
Fix the timestamp decoding
i2cdump: Fix I2C block mode error code
Remove man page reference to hardware monitoring chips
Let the user specify a register range
i2cset: Final status messages go to stdout
Return success even when readback fails or doesn't match
i2c-stub-from-dump: New helper script to use with i2c-stub

6
tools/i2cdump.8
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@ -5,6 +5,7 @@ i2cdump \- examine I2C registers
.SH SYNOPSIS
.B i2cdump
.RB [ -f ]
.RB [ "-r first-last" ]
.RB [ -y ]
.I i2cbus
.I address
@ -30,6 +31,11 @@ kernel driver. Using this flag is dangerous, it can seriously confuse the
kernel driver in question. It can also cause i2cdump to return invalid
results. So use at your own risk and only if you know what you're doing.
.TP
.B -r first-last
Limit the range of registers being accessed. This option is only available
with modes \fBb\fP, \fBw\fP, \fBc\fP and \fBW\fP. For mode \fBW\fP,
\fBfirst\fR must be even and \fBlast\fR must be odd.
.TP
.B -y
Disable interactive mode. By default, i2cdump will wait for a confirmation
from the user before messing with the I2C bus. When this flag is used, it

80
tools/i2cdump.c
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@ -2,7 +2,7 @@
i2cdump.c - a user-space program to dump I2C registers
Copyright (C) 2002-2003 Frodo Looijaard <frodol@dds.nl>, and
Mark D. Studebaker <mdsxyz123@yahoo.com>
Copyright (C) 2004-2007 Jean Delvare <khali@linux-fr.org>
Copyright (C) 2004-2008 Jean Delvare <khali@linux-fr.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
@ -31,8 +31,8 @@
static void help(void)
{
fprintf(stderr, "Syntax: i2cdump [-f] [-y] I2CBUS ADDRESS [MODE] "
"[BANK [BANKREG]]\n"
fprintf(stderr, "Syntax: i2cdump [-f] [-r first-last] [-y] I2CBUS "
"ADDRESS [MODE] [BANK [BANKREG]]\n"
" i2cdump -V\n"
" MODE is one of:\n"
" b (byte, default)\n"
@ -61,12 +61,15 @@ int main(int argc, char *argv[])
int pec = 0, even = 0;
int flags = 0;
int force = 0, yes = 0, version = 0;
const char *range = NULL;
int first = 0x00, last = 0xff;
/* handle (optional) flags first */
while (1+flags < argc && argv[1+flags][0] == '-') {
switch (argv[1+flags][1]) {
case 'V': version = 1; break;
case 'f': force = 1; break;
case 'r': range = argv[1+(++flags)]; break;
case 'y': yes = 1; break;
default:
fprintf(stderr, "Warning: Unsupported flag "
@ -179,6 +182,39 @@ int main(int argc, char *argv[])
}
}
/* Parse optional range string */
if (range) {
char *dash;
first = strtol(range, &dash, 0);
if (dash == range || *dash != '-'
|| first < 0 || first > 0xff) {
fprintf(stderr, "Error: Invalid range parameter!\n");
exit(1);
}
last = strtol(++dash, &end, 0);
if (end == dash || *end != '\0'
|| last < first || last > 0xff) {
fprintf(stderr, "Error: Invalid range parameter!\n");
exit(1);
}
/* Check mode constraints */
switch (size) {
case I2C_SMBUS_BYTE:
case I2C_SMBUS_BYTE_DATA:
break;
case I2C_SMBUS_WORD_DATA:
if (!even || (!(first%2) && last%2))
break;
/* Fall through */
default:
fprintf(stderr,
"Error: Range parameter not compatible with selected mode!\n");
exit(1);
}
}
file = open_i2c_dev(i2cbus, filename, 0);
if (file < 0) {
exit(1);
@ -273,6 +309,11 @@ int main(int argc, char *argv[])
fprintf(stderr, "Probing bank %d using bank "
"register 0x%02x.\n", bank, bankreg);
}
if (range) {
fprintf(stderr,
"Probe range limited to 0x%02x-0x%02x.\n",
first, last);
}
fprintf(stderr, "Continue? [Y/n] ");
fflush(stderr);
@ -334,7 +375,7 @@ int main(int argc, char *argv[])
}
if (size == I2C_SMBUS_BYTE) {
res = i2c_smbus_write_byte(file, 0);
res = i2c_smbus_write_byte(file, first);
if(res != 0) {
fprintf(stderr, "Error: Write start address "
"failed, return code %d\n", res);
@ -347,9 +388,24 @@ int main(int argc, char *argv[])
for (i = 0; i < 256; i+=16) {
if (size == I2C_SMBUS_BLOCK_DATA && i >= s_length)
break;
if (i/16 < first/16)
continue;
if (i/16 > last/16)
break;
printf("%02x: ", i);
for (j = 0; j < 16; j++) {
fflush(stdout);
/* Skip unwanted registers */
if (i+j < first || i+j > last) {
printf(" ");
if (size == I2C_SMBUS_WORD_DATA) {
printf(" ");
j++;
}
continue;
}
if (size == I2C_SMBUS_BYTE_DATA) {
block[i+j] = res =
i2c_smbus_read_byte_data(file, i+j);
@ -390,6 +446,11 @@ int main(int argc, char *argv[])
if (size == I2C_SMBUS_BLOCK_DATA
&& i+j >= s_length)
break;
/* Skip unwanted registers */
if (i+j < first || i+j > last) {
printf(" ");
continue;
}
res = block[i+j];
if (res < 0)
@ -410,8 +471,19 @@ int main(int argc, char *argv[])
} else {
printf(" 0,8 1,9 2,a 3,b 4,c 5,d 6,e 7,f\n");
for (i = 0; i < 256; i+=8) {
if (i/8 < first/8)
continue;
if (i/8 > last/8)
break;
printf("%02x: ", i);
for (j = 0; j < 8; j++) {
/* Skip unwanted registers */
if (i+j < first || i+j > last) {
printf(" ");
continue;
}
res = i2c_smbus_read_word_data(file, i+j);
if (res < 0)
printf("XXXX ");

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