Hi Rudolf,
> 10:41 < khali> on SMBus we have temperature and voltage monitoring
On my system from MSI RS480M2-IL with LPC47M997 is supported only
CPU and SYSTEM temperature reading. Voltage reading is not supported in a
hardware monitoring section of SMSC chip.
> i2cdump 0 0x2d
>
> Should give you a register dump.
Here is my actual dump:
----------------------
[root at home ~]# i2cdump 0 0x2d
No size specified (using byte-data access)
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c/0, address 0x2d, mode byte
Continue? [Y/n]
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX 50 02 XXXXXXXXXXXXXXP?
20: 00 00 00 00 87 c4 2f 23 XX XX XX ff 00 ff 00 ff ....??/#XXX.....
30: 00 ff 00 ff 00 ff 00 3a 80 7f 80 XX XX XX 55 20 .......:???XXXU
40: 29 0f 0c XX XX XX XX 00 XX 80 00 02 00 00 XX 04 )??XXXX.X?.?..X?
50: 00 00 74 XX ff 00 ff 00 7f 80 XX XX XX XX XX XX ..tX....??XXXXXX
60: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
70: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
80: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
90: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
a0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
b0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
c0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
d0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
e0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
f0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
----------------------
> Datasheet is here
> http://www.smsc.com/main/tools/discontinued/47m15x.pdf
Registers are same on my system with LPC47M997.
> Now please read the value on offset 0x31 (5V high limit) and add one to it
> and write it back to chip
>
> i2cset 0 0x2d 0x31 0xyourvall
> Readback should match.
It works for me. But voltage measuring is not available on my system.
I tried other offsets with R/W registers and they worked too.
Here is interesting registers of my chip:
0x26 Remote Diode Temperature Reading 1 (CPU temperature) Value 0x30 48 C
0x27 Ambient Temperature Reading (System temperature) Value 0x24 36 C
0x37 Remote Temperature High Limit 1 Value 0x3c 60 C
0x38 Remote Temperature Low Limit 1 Value 0x80 128 C
0x39 Remote Temperature High Limit 1 Value 0x7f 127 C
0x3A Remote Temperature Low Limit 1 Value 0x80 128 C
These temperatures are probably in a Celsius. They are changing when I load
processor. They look good and identical to BIOS and Winblows measuring tool.
Register 0x37 is possible to change in a BIOS.
I don't understand how limits works on a 0x37 to 0x3A offsets.
Can you point me to a documentation or a little explain, how they works? ;-)
Thanks.
Best regards,
Pavel Ruzicka
