Embedded Systems Conference
Breaking News
Comments
Oldest First | Newest First | Threaded View
Page 1 / 5   >   >>
Max The Magnificent
User Rank
Author
Cow and Horse Manure
Max The Magnificent   4/25/2014 2:29:29 PM
NO RATINGS
As an aside, while I was writing this column, my inventer friend Brian LaGrave dropped by my office with his two sons (Sam and Daniel) bearing gifts -- two large plastic coffee containers -- one loaded with cow manure and the other loaded with horse manure.

I'm going to be using these materials in my experiments to age the brass panels I'm using in my Inamorata Prognostication Engine

betajet
User Rank
Author
What's your data rate?
betajet   4/25/2014 3:01:47 PM
NO RATINGS
The obvious first question is "what's your data rate?"  I2C is pretty slow: it was originally designed for passing control information between digital components in early TVs with digital chips.  OTOH, I2C is very forgiving electrically: I2C components include input filtering so it doesn't matter if your SDA and SCL are ringing.  This is nice if you're going between boards.

SPI can run much faster, but you have to ensure good signal integrity on your clock.

If you're running very slow, you might consider UART.  Then you can debug each board separately using a terminal emulator on a PC.  You need to get a USB to UART dongle with the correct voltage for UART signals for your board.  Here's one from Adafruit http://www.adafruit.com/products/954.

You can also get dongles that talk I2C or SPI and talk to your boards individually from a PC, or monitor what's happening on the line.  However, then you have to write I2C/SPI code on your PC which could be a steeper learning curve than using your embedded boards.  Still, here are some cables from FTDI: http://www.ftdichip.com/Products/Cables/USBMPSSE.htm.

Max The Magnificent
User Rank
Author
Re: What's your data rate?
Max The Magnificent   4/25/2014 3:13:24 PM
NO RATINGS
@betajet: The obvious first question is "what's your data rate?"

Do I look like a man who has a clue? My first-pass philosophy is to make it "go like the clappers" LOL

betajet
User Rank
Author
Re: What's your data rate?
betajet   4/25/2014 3:31:00 PM
NO RATINGS
Max wrote: My first-pass philosophy is to make it "go like the clappers" LOL

I guess you need Gigabit Ethernet then :-)  Use fiber fibre optics, then you don't need to worry about having a common ground earth :-)

Max The Magnificent
User Rank
Author
Re: What's your data rate?
Max The Magnificent   4/25/2014 3:33:47 PM
NO RATINGS
@Betajet: Use fiber fibre optics, then you don't need to worry about having a common ground earth :-)

No need to try to find the right words -- I'll have you know that I'm bilingual -- I speak both English and American!

 

betajet
User Rank
Author
Re: What's your data rate?
betajet   4/25/2014 4:50:36 PM
NO RATINGS
Yeah, but I had to look up "go like the clappers" even though I'm sure you recognized my real name as English, albeit with 'Mercan spelling :-)

 

jstabler
User Rank
Author
Re: What's your data rate?
jstabler   4/25/2014 4:54:50 PM
NO RATINGS
I noticed in this blog and your Golden Ratio blog you mention an alternative to Bodacious Acoustic Diagnostic Astoundingly Superior Spectromatic (BADASS)dislay, the BIGASS display. What do these letters represent?

Max The Magnificent
User Rank
Author
Re: What's your data rate?
Max The Magnificent   4/25/2014 5:02:13 PM
NO RATINGS
@jstabler: ....the BIGASS display. What do these letters represent?

Arrgghh -- it must have been my subconcious projecting again (all those bacon butties aren't doing my figure any good) -- I changed it to BADASS -- good catch -- keep up the good work!!!

Max The Magnificent
User Rank
Author
Re: What's your data rate?
Max The Magnificent   4/25/2014 5:04:51 PM
NO RATINGS
@betajet: Yeah, but I had to look up "go like the clappers"...

That's why my blogs are so efficacious (dare we say "puissant") with regard to maintaining your interest LOL

Duane Benson
User Rank
Author
Semi-custom might work too
Duane Benson   4/25/2014 5:14:16 PM
NO RATINGS
You could also utilize SPI, but use it in your own custom way.

First, wire it all up as though it were an SPI, but don't put the Arduino Mega or ChipKIT pins into SPI mode. You can use the pins as GPIO for your handshaking.

The ChipKIT can set one of the lines to indicate data is ready. The Mega can poll that line when it has spare cycles. Then after the handshaking indicates everything is ready, switch the pins on both sides to be SPI and transfer the data. Switch back after the transfer.

Page 1 / 5   >   >>


Radio
NEXT UPCOMING BROADCAST

As we unveil EE Times’ 2015 Silicon 60 list, journalist & Silicon 60 researcher Peter Clarke hosts a conversation on startups in the electronics industry. Panelists Dan Armbrust (investment firm Silicon Catalyst), Andrew Kau (venture capital firm Walden International), and Stan Boland (successful serial entrepreneur, former CEO of Neul, Icera) join in the live debate.
Flash Poll
Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Special Video Section
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LT®3042 is a high performance low dropout linear ...
Chwan-Jye Foo (C.J Foo), product marketing manager for ...
The LT®3752/LT3752-1 are current mode PWM controllers ...
LED lighting is an important feature in today’s and future ...
Active balancing of series connected battery stacks exists ...
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...