[Nut-upsuser] bcmxcp_usb can not communicate with Eaton Powerware 5110

[Kjell Claesson]

söndagen den 15 juli 2012 16.59.56 skrev  Greg Vickers:

Hi Greg,

> On 13/07/12 22:24, Charles Lepple wrote:
> > On Jul 13, 2012, at 12:41 AM, Greg Vickers wrote:
> >>    0.238682    get_answer: (128 bytes) => ab 01 79 01 02 50 00 50 01 00
> >>    0e 00 01 00 10 50 0.239445     4f 57 45 52 57 41 52 45 20 55 50 53 20
> >>    20 20 5c 00 00 00 00 00 00 00 00 00 0.240107     00 00 00 00 00 00 00
> >>    00 00 00 00 00 00 00 00 00 00 00 51 51 00 00 00 00 51 0.240351     00
> >>    00 00 00 00 00 00 f0 00 f0 00 00 00 f0 00 00 00 00 00 00 00 00 f0 00
> >>    00 0.240558     00 00 00 00 00 00 51 00 00 51 00 00 00 00 00 00 00 00
> >>    00 f0 00 00 00 00 00 0.241334     00 00 00 00 00 00 00 f0 18 3b ab 01
> >>    0.241969    get_answer: block_number = 1
> >>    0.242121    get_answer: sequence number (1) is ok
> >>    0.242254    get_answer: checksum is ok
> >>    0.242891    get_answer: block_number = 1
> >>    0.243072    Communications with UPS lost: get_answer: not the right
> >>    sequence received 0!!!> 
> > Well, that's odd.

Yep that's odd. If it would be the last sequence the sequence-number should
read 82.
 The sequence is numbered in ascending order and on the last sequence the msb
is set to 1. (10000010 = 82 Hex) 

> > 
> > I'm not an expert on this driver, but a quick read of that portion of the
> > code implies that this shouldn't happen.
> > 
> > The last line says the received sequence number is 0. I think the sequence
> > number is the 4th byte (my_buf[3]), which is 1 in the hex dump you
> > posted:
8<---------snip----------------

Yep Charles is right. The problem with the 5110 is that it was one of the 
first that was equipped with usb. This implementation is not following the
usb criteria. That is why there is difference between this and later ups'es.

Look at:
http://trac.networkupstools.org/projects/nut/browser/trunk/drivers/bcmxcp_usb.c#L49

And the difference in line 59 for the phonitextec interface that the 5110 use.

I have backed off a bit from the development, and I don't have any early 
Powerware to test the driver.

But I know that Arnaud made some changes around the problem with the 5110.

Regards
Kjell Claesson