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Improve DS1621 detection to prevent other chips from being

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misdetected as one. Thanks to Aurelien Jarno for testing.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@3234 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Jean Delvare
2006-01-17 07:34:49 +00:00
parent 99a6949224
commit eb80b6f0bd
1 changed files with 6 additions and 7 deletions
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13
prog/detect/sensors-detect
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@@ -3151,19 +3151,18 @@ sub lm92_detect
# 0xAC: Configuration
# Detection is weak. We check if bit 4 (NVB) is clear, because it is
# unlikely to be set (would mean that EEPROM is currently being accessed).
# Temperature checkings will hopefully prevent LM75 chips from being
# detected as a DS1621.
# Temperature checkings will hopefully prevent LM75 or other chips from
# being detected as a DS1621.
sub ds1621_detect
{
my $i;
my ($file,$addr) = @_;
my $temp = i2c_smbus_read_word_data($file,0xAA);
return if ($temp & 0x7F00);
$temp = i2c_smbus_read_word_data($file,0xA1);
return if ($temp & 0x7F00);
$temp = i2c_smbus_read_word_data($file,0xA2);
return if ($temp & 0x7F00);
my $high = i2c_smbus_read_word_data($file,0xA1);
my $low = i2c_smbus_read_word_data($file,0xA2);
return if ($temp | $high | $low) & 0x7F00;
my $conf = i2c_smbus_read_byte_data($file,0xAC);
return if ($temp == 0 && $high == 0 && $low == 0 && $conf == 0);
return 3 if ($conf & 0x10) == 0x00;
return;
}