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Accelerometer reference design?

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henry10210's picture
henry10210
Junior(0)
Accelerometer reference design?

Hi all, it's getting on nearly a year since Xfest 2014, in which I saw a demo that includes an accelerometer. After googling, I found something that Lars wrote (http://wiki.analog.com/resources/fpga/xilinx/pmod/adxl345). But the date is slightly newer than the Xfest 2014 date, so I am not sure if this is what I saw.

Can anyone share his knowledge on the current best accelerometer reference design on Zedboard?

w/ regards,
Henry

zedman2000's picture
zedman2000
Moderator(2)
Henry,

Henry,
I'm glad that you attended X-Fest!
There was a demo called the Sensor Fusion demo. It had an accelerometer based reference design on it called "MEMS-Based Vibration Analyzer with Frequency Response Compensation". It is made by Analog Devices. In the demo, it was used to create a vibration profile of the servo - which simulated the motor on a plastic extrusion machine. Adding one moe piece of data for preventative maintenance.

Here is a link to the CN0303: http://www.analog.com/en/design-center/reference-designs/hardware-refere...

Is this what you saw?

--Dan

henry10210's picture
henry10210
Junior(0)
Re: Accelerometer reference design?

Thanks for the quick reply Dan, I can't recall exactly. My note from that day only says PMOD, so I don't remember if this was it. Can we take a step back: I am just looking to pick up a accelerometer board that I can read easily from Zedboard (already running Linux). I can read either IIO ADC, or use the device driver that I pointed to in my original email. Can you please advise?

zedman2000's picture
zedman2000
Moderator(2)
Henry,

Henry,

It looks like Analog Devices has an IIO capable acceleromoter:
http://wiki.analog.com/resources/tools-software/linux-drivers/iio-adc/ad...

However, if you do not know what you need, let's start with the range of acceleration you need. This can help narrow what you want to use. It also will help to determine how fast you need the samples. If you need low power and slow reads, then something that is read digitally is probably the easiest to implement. Freescale and ST have solutions that fit this quite well.

If you need something high speed, then you probably want a dedicated ADC coupled with an Analog Accelerometer.

The CN0303 handles the Analog to Digital conversion, then essentially will give you frequency results.

Are you looking for frequency, or are you looking for acceleration?

--Dan

henry10210's picture
henry10210
Junior(0)
Re: Accelerometer reference design?

Hi Dan, my application is low speed tip/tilt sensing, so I think ADXL345. I am trying to figure out the PN for the PMOD board plugged into the Zedboard, shown on the application note: wiki.analog.com/resources/fpga/xilinx/pmod/adxl345

Not obvious if ADI is selling it on
www.analog.com/en/products/mems/mems-accelerometers/adxl345.html#product...

zedman2000's picture
zedman2000
Moderator(2)
Henry,

Henry,

It looks like PmodACL.
It looks available through Avnetexpress
http://avnetexpress.avnet.com/store/em/EMController/Development-Kits/Dig...

as well as

http://www.digilentinc.com/Products/Detail.cfm?Prod=PMOD-ACL

Good luck with your design! Let me know if you need more assistance!

--Dan