Hi Richard,
> Its what's known in Blighty as WKS (Wanky Kids
Speak).
>
> (yes I'm deliberately using terms not everybody would understand)
Have you seen the latest Gesture-based remote control for TVs? I guess the
gesture for getting to Channel 69 is quite obvious?
http://www.reghardware.co.uk/2009/02/23/ipoint3d_tv/
--
Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
CrossWorks for ARM, MSP430, AVR, MAXQ, and now Cortex-M3 processors
transfer speed of data using uipstack and free rtos
Started by ●February 22, 2009
Reply by ●February 23, 20092009-02-23
Reply by ●February 23, 20092009-02-23
Is there not a quiet period required between packets as well?
Robert
Original Message:
-----------------
From: Paul Curtis p...@rowley.co.uk
Date: Mon, 23 Feb 2009 14:41:39 -0000
To: l...
Subject: RE: [lpc2000] transfer speed of data using uipstack and free rtos
Hi,
> 3. You have always an overhead. Even with raw-ethernet you have one of
> 18 bytes + 8 byte preamble, i.e. 1.7%.
More than that, in fact. I calculate (preamble, 2 MAC addresses, Ethertype,
, CRC, interframe gap) = 8 + 12 + 2 + 4 + 12 = 38 bytes... And
then you need to put IP headers in the payload...
--
Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
CrossWorks for ARM, MSP430, AVR, MAXQ, and now Cortex-M3 processors
Robert
Original Message:
-----------------
From: Paul Curtis p...@rowley.co.uk
Date: Mon, 23 Feb 2009 14:41:39 -0000
To: l...
Subject: RE: [lpc2000] transfer speed of data using uipstack and free rtos
Hi,
> 3. You have always an overhead. Even with raw-ethernet you have one of
> 18 bytes + 8 byte preamble, i.e. 1.7%.
More than that, in fact. I calculate (preamble, 2 MAC addresses, Ethertype,
, CRC, interframe gap) = 8 + 12 + 2 + 4 + 12 = 38 bytes... And
then you need to put IP headers in the payload...
--
Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
CrossWorks for ARM, MSP430, AVR, MAXQ, and now Cortex-M3 processors
Reply by ●February 23, 20092009-02-23
That's the inter-frame gap, depends upon whether it is 10base or 100base.
I
believe the minimum is 96 bit times (the 12 bytes in the calculation below).
> -----Original Message-----
> From: l... [mailto:l...] On Behalf
Of
> s...@aeolusdevelopment.com
> Sent: 23 February 2009 18:44
> To: l...; l...
> Subject: RE: [lpc2000] transfer speed of data using uipstack and free rtos
>
> Is there not a quiet period required between packets as well?
>
> Robert
>
> Original Message:
> -----------------
> From: Paul Curtis p...@rowley.co.uk
> Date: Mon, 23 Feb 2009 14:41:39 -0000
> To: l...
> Subject: RE: [lpc2000] transfer speed of data using uipstack and free rtos
> Hi,
>
> > 3. You have always an overhead. Even with raw-ethernet you have one of
> > 18 bytes + 8 byte preamble, i.e. 1.7%.
>
> More than that, in fact. I calculate (preamble, 2 MAC addresses,
> Ethertype,
> , CRC, interframe gap) = 8 + 12 + 2 + 4 + 12 = 38 bytes... And
> then you need to put IP headers in the payload...
>
> --
> Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
> CrossWorks for ARM, MSP430, AVR, MAXQ, and now Cortex-M3 processors
>
believe the minimum is 96 bit times (the 12 bytes in the calculation below).
> -----Original Message-----
> From: l... [mailto:l...] On Behalf
Of
> s...@aeolusdevelopment.com
> Sent: 23 February 2009 18:44
> To: l...; l...
> Subject: RE: [lpc2000] transfer speed of data using uipstack and free rtos
>
> Is there not a quiet period required between packets as well?
>
> Robert
>
> Original Message:
> -----------------
> From: Paul Curtis p...@rowley.co.uk
> Date: Mon, 23 Feb 2009 14:41:39 -0000
> To: l...
> Subject: RE: [lpc2000] transfer speed of data using uipstack and free rtos
> Hi,
>
> > 3. You have always an overhead. Even with raw-ethernet you have one of
> > 18 bytes + 8 byte preamble, i.e. 1.7%.
>
> More than that, in fact. I calculate (preamble, 2 MAC addresses,
> Ethertype,
> , CRC, interframe gap) = 8 + 12 + 2 + 4 + 12 = 38 bytes... And
> then you need to put IP headers in the payload...
>
> --
> Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
> CrossWorks for ARM, MSP430, AVR, MAXQ, and now Cortex-M3 processors
>
Reply by ●February 23, 20092009-02-23
Paul Curtis wrote:
> That's the inter-frame gap, depends upon whether it is 10base or 100base. I
> believe the minimum is 96 bit times (the 12 bytes in the calculation below).
Ah, I didn't see the interframe. Apparently I've been following Ralph's
references.
Robert
--
http://www.aeolusdevelopment.com/
From the Divided by a Common Language File (Edited to protect the guilty)
ME - "I'd like to get Price and delivery for connector Part # XXXXX"
Dist./Rep - "$X.XX Lead time 37 days"
ME - "Anything we can do about lead time? 37 days seems a bit high."
Dist./Rep - "that is the lead time given because our stock is live....
we currently have stock."
> That's the inter-frame gap, depends upon whether it is 10base or 100base. I
> believe the minimum is 96 bit times (the 12 bytes in the calculation below).
Ah, I didn't see the interframe. Apparently I've been following Ralph's
references.
Robert
--
http://www.aeolusdevelopment.com/
From the Divided by a Common Language File (Edited to protect the guilty)
ME - "I'd like to get Price and delivery for connector Part # XXXXX"
Dist./Rep - "$X.XX Lead time 37 days"
ME - "Anything we can do about lead time? 37 days seems a bit high."
Dist./Rep - "that is the lead time given because our stock is live....
we currently have stock."
Reply by ●February 24, 20092009-02-24
On Monday 23 February 2009 22:07, Anand Palaniswamy wrote:
> my language is bad because its not my mother tongue and its the way
> of short form we speak
Please speak for yourself. We (most Indians i know) DO NOT "speak" or
write in crappy sms lingo irrespective of ones mother tongue. And
nobody is grumbling about grammar, people are complaining about
spelling of simple words like you != u your != ur we != v please !pls.
When speaking to an unknown audience one should stick to the
dictionary.
--
Rgds
JTD
> my language is bad because its not my mother tongue and its the way
> of short form we speak
Please speak for yourself. We (most Indians i know) DO NOT "speak" or
write in crappy sms lingo irrespective of ones mother tongue. And
nobody is grumbling about grammar, people are complaining about
spelling of simple words like you != u your != ur we != v please !pls.
When speaking to an unknown audience one should stick to the
dictionary.
--
Rgds
JTD
