[hpsdr] Operating Configurations

[Alex]

At startup time we need to be able to have OZY know what is connected to ATLAS and report it back to the host computer or to SASQUATCH. 

So would this be a sequencing at HPSDR connection time (host computer, no SASQUATCH):

(1) Host computer queries OZY via USB for device descriptors
(2) OZY queries the cards via the Dallas 1-wire interface for their device descriptors (stored on each card)
(3) OZY returns the device descriptors to the host computer
(4) Host computer then transmits via USB the appropriate device control 8051 code to be loaded into OZY's FX2 for operations (based on the device descriptors returned)
(5) OZY FX2 loads the received code, and activates the reset line for the ATLAS bus 
(6) All ATLAS cards reset and report ready status to OZY via I2C bus


Alex, N3NP


 
----- Original Message ----
From: Philip Covington <p.covington at gmail.com>
To: Lyle Johnson <kk7p at wavecable.com>
Cc: Christopher T. Day <CTDay at lbl.gov>; hpsdr at hpsdr.org
Sent: Friday, May 12, 2006 9:07:32 AM
Subject: Re: [hpsdr] Operating Configurations

***** High Performance Software Defined Radio Discussion List *****

On 5/11/06, Lyle Johnson <kk7p at wavecable.com> wrote:
<snip>
> What if we dedicate yet another ATLAS tine - X16C0/pin A18 - to a 1-wire
> bus and add a Dallas 1-wire serial number chip with EEPROM (DS2430
> series, for example)?  You can have a gazillion of these - more than
> we'll ever have slots - and each one has a unique electronic serial
> number besides.  The protocol to enumerate the devices is readily
> available and easy to implement.

We use the dallas S/N and temp sensor devices to ID our boards at OSU-ISL.

For HPSDR OZY we could steal one of the serial ports from the FX2 and
use a DS2480B to interface to the 1-Wire bus.  That way we would not
have to generate the 1-Wire timing in the FX2 or FPGA.  The FX2
firmware would just set up the serial port and read the 1-Wire bus for
configuration.

<http://pdfserv.maxim-ic.com/en/ds/DS2480B.pdf>

73 de Phil N8VB
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