Level Converter not Level I Ordered?

[GBradburn]

Hi,

I ordered several SUB-20 devices with 1.2V level converter for MDIO communications. After having no success with the device I measured the voltage levels on pins 1 and 7 of J6 (MDC1 and MDIO1) and found 3.3V. Do I need to connect a reference voltage to the device or did I just not get what I ordered?

Thanks,

Greg

[xol]

Hi,
Sure you have to use reference voltage to make level converters work. Otherwise they can not know what specific voltage is required. Let's do it together:

1. Jumpers configuration:
Set JP6 2-3 - External SPI voltage via J6.9 or DB9.3
http://www.xdimax.com/sub20/doc/HTML/jumpers.htm

2. Connect reference voltage to J6.9 or DB9.3

3. Now pins marked as Optional Level Converter* are working with reference voltage
http://www.xdimax.com/sub20/doc/HTML/spi_header.htm

[GBradburn]

Thanks for your help.

I have made the connections you have indicated: Jumper JP6 2-3 and 1.2V reference to J6.9. I now see 1.2V on the MDC1 and MDIO1 lines.

From the command prompt I issue the command:
Sub_app.exe --mdio=1a,0x1F,0x01,0xA011 --mdio=1r,0x1f,0x01,0xA011

I am expecting this to achieve the following:
--mdio=1a,0x1F,0x01,0xA011 -- set the operation address to 0xA011 on port 0x1F, device 1
--mdio=1r,0x1f,0x01,0xA011 -- read the value at register 0xA011 and return it in the data field (does it matter what I put in the data field? Here I have entered a value of 0xA011 but I don't think it uses this value except to return a result.

The response back from the sub_app.exe is:
MDIO[0] data=0xA011 -- it just echoes back the register address
MDIO[1] data=0xFFFF -- the content of this location should be 0x0200

Using LabVIEW and dll function calls I can read the serial number and product ID of the SUB-20 but I get the same result when I issue the corresponding MDIO commands shown above using a call to the dll function sub_mdio_xfer_ex.

I know the MDIO on the DUT is OK (I can read back 0x0200 using a different converter) but there is still something missing with the SUB-20 device. Am I sending the wrong command? Do I need to provide a clock or other signals to the SUB-20?

Thanks again,
Greg

[GBradburn]

In addition to the previous post, here are some more specific questions which I can't find answers for on the web site or in the manual:

I am trying to use MDIO to communicate to an MDIO clause 45 compliant device operating at 1.2V. I special ordered 5 SUB-20 devices with 1.2V level converters. The manual doesn't include much detail on how to set up the device for MDIO or the level converters so I have been assuming no setup is required. Through help from the tech support team I have learned I do need to physically configure the level converter to operate at 1.2V by providing a reference from my device and setting a jumper.

1) Since I am using SPI / J6 do I need to configure the SPI interface at all? If yes, what needs set?
2) Do I need to enable the SPI?
3) Do I need to provide an external clock?

Thanks,

Greg

[xol]

HI,

1) Since I am using SPI / J6 do I need to configure the SPI interface at all? If yes, what needs set?
2) Do I need to enable the SPI?
3) Do I need to provide an external clock?

1. No
2. No
3. No

First of all tell me please what FW version do you have?
Run

Code: Select all

<0> ./sub_app.exe --version
XDimax LTD, V0.1.6, Sep 27 2010 18:16:12
DLL/Lib: 0.1.12.18
Driver : 0.1.12.1
SUB-20 : 0.2.8 <---- SUB-20 Version
Boot   : 0.5

If your version is below 0.2.8 you need to upgrade it.
Let me know.

[GBradburn]

Hi,

sub_app.exe --version
XDimax LTD, V0.1.6, Aug 17 2010 21:56:51
DLL/Lib: 0.0.2.18
Driver : 0.0.2.0
SUB-20 : 0.2.2
Boot : 0.5

It looks like I have an older SUB-20 driver. Where do I find the update and how do I install it?

Thanks,

Greg

[xol]

You can use this link:
viewtopic.php?f=2&t=3#p353

Or simply go to download section on the web page:
http://www.xdimax.com/sub20/sub20.html#DLD

[GBradburn]

Hi,

Note that these two links point to different versions and I misunderstood the versioning convention. I actually do have the latest version (0.2.2 as noted in my previous post) and I still have the issue of not being able to communicate with an MDIO device at 1.2V.

Please help.

Regards,
Greg

[GBradburn]

After reviewing your note above maybe I still don't understand the versioning.

After installing from the second link in your response above I get:
sub_app.exe --version
XDimax LTD, V0.1.6, SEP 23 2010 00:04:11
DLL/LIB: 0.0.2.18
Driver : 0.0.2.0
SUB-20: 0.2.2
Boot : 0.5

This looks like I still don't have SUB-20 vs 0.2.8 or later.

My process was to download the software from the link you provided and save it to my hard drive. I then uninstalled the previous version and double-clicked the saved file to install the latest.

The date on the currently installed version appears to have been updated appropriately but the SUB-20 version isn't late enough. What am I doing wrong?

Thanks,
Greg

[xol]

HI,
You have to upgrade FW with SUB-20 FW Updater.
Look here:
viewtopic.php?f=2&t=31&start=0