Embedded Systems Conference
Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 5 / 5
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
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
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

<<   <   Page 5 / 5


Radio
LATEST ARCHIVED BROADCAST
As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
Like Us on Facebook
Special Video Section
The LTC®6363 is a low power, low noise, fully differential ...
Vincent Ching, applications engineer at Avago Technologies, ...
The LT®6375 is a unity-gain difference amplifier which ...
The LTC®4015 is a complete synchronous buck controller/ ...
10:35
The LTC®2983 measures a wide variety of temperature sensors ...
The LTC®3886 is a dual PolyPhase DC/DC synchronous ...
The LTC®2348-18 is an 18-bit, low noise 8-channel ...
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 ...