[hpsdr] OCXO's for Griffin/ PIC like processor

[Phil Harman]

Hi Henry,

Understood - we will be sure to consider that as an option.

73 Phil...VK6APH


----- Original Message ----- 
From: "Henry Vredegoor" <henry.vredegoor at gmail.com>
Cc: <hpsdr at lists.openhpsdr.org>
Sent: Thursday, September 09, 2010 6:43 PM
Subject: Re: [hpsdr] OCXO's for Griffin/ PIC like processor


> ***** High Performance Software Defined Radio Discussion List *****
>
>  Hi Phil, All,
>
> Sorry for responding so late to your reaction to my post.
> Somehow it ended up in my SPAM folder where I found it while cleaning up
> my mail....
>
> On 8/31/2010 3:04 AM, Phil Harman wrote:
>>> >  Maybe wise to include a small, PIC-like processor for this task 
>>> > instead
>>> >  of doing this in the FPGA softcore processor.
>>> >
>> Sorry, don't follow your logic. The softcore uP is free whilst the PIC
>> will cost $s?  I see that many of the future HPSDR project will be using
>> soft uPs so this is a good time to start learning how to use them. We
>> intend to incorporate one in the OzyII FPGA.
>>
>>
>
> Let me explain my thoughts / logic some more:
>
> Of course developing a softcore microprocessor setup in FPGA for HPSDR
> is a cool development and I'am all for it.
>
> My reason for mentioning a PIC-like processor was that these types of
> small processors are often already used for this kind of task.
> Software for different protocol type decoding may already be there and
> probably could be (partly-) re-used.
> The recent types already include extensive serial communication hardware
> provisions, so it would be very easy to implement a serial interface.
> Also I think a lot more people are familiar with programming  these type
> of processors, which could help software/protocol development and
> availability.
> The chips are not expensive at all, about USD 5 for larger quantities I
> think would be a fair estimate for a top-range type device.
>
> Would a separate, independent communications "front end" micro processor
> not relieve the "main" softcore processor from trivial tasks without
> possibly interfering with time-critical tasks?
>
>
> 73's,
>
> Henry - PA0HJA
>
>
>
>
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