ADS1118EVM: Require a comptabile upgraded driver.

Meera Mangaleshwaran

Part Number: ADS1118EVM
Other Parts Discussed in Thread: ADS1118,

Hello,

I would like to try and speed up the monitor inorder to see a sin curve, in order to do that I need an upgraded driver for the chip.

What driver would be recommened for this kit?

Thanks again,

Mimi

over 5 years ago

0 Joseph Wu over 5 years ago

TI__Guru* 95945 points

Mimi,

I'm not sure I understand. The ADS1118 runs at specific data rates, all of which should be accessible and viewable from the EVM GUI. If the software is running, you should be able to see the functionality of the device.

Is the EVM GUI running? Are you able to read data from the device?

Joseph Wu

0 Meera Mangaleshwaran over 5 years ago in reply to Joseph Wu

Prodigy 40 points

Hi Joseph,

The EVM GUI is running and I am able to read the data from the device. Ultimately I need to develop an implant microcontroller code for an instrumental spinal rod to measure strain.

Is there anyway I could increase the data rate of the ADS1118 and speed up the display on the monitor?

Mimi

0 Joseph Wu over 5 years ago in reply to Meera Mangaleshwaran

TI__Guru* 95945 points

Meera,

I would look over the code used to develop this EVM. In case you haven't seen it, we do have it available as a download in the EVM folder:

http://www.ti.com/tool/ADS1118EVM

If you look further down in the "Software" section, you can find the ADS1118EVM Source Code as a zipped download.

I would note that we only make this available as an example, and that we may not be able to help with the development beyond offering the code.

Joseph Wu

0 Meera Mangaleshwaran over 5 years ago in reply to Joseph Wu

Prodigy 40 points

Hi Joseph,

Thank you for that! and no i understand completely.

I had a go again to double check and turns out the device is not running as fast as it should do at 860 samples per second.

Would the fact that I am using windows 10 make a difference ?

Best,

Meera

0 Joseph Wu over 5 years ago in reply to Meera Mangaleshwaran

TI__Guru* 95945 points

Meera,

I think the EVM is working as intended on your Windows 10 computer. The EVM was meant to show the method of cold-junction compensation for a K-type thermocouple measurement, and speed wasn't built into the EVM demo. Regardless of the data rate of the ADC, the master on the SM-USB-DIG doesn't try to communicate with the device any faster, and data rate is reported very slowly,

Joseph Wu

0 Meera Mangaleshwaran over 5 years ago in reply to Joseph Wu

Prodigy 40 points

Hi Joseph,

I think i understand now. In that case are there any other demo boards available for this chip? or any similar chips?

If not i will most likely modify the source code to sample at higher speeds which I understand that you cannot assist me with, understandbly.

Meera

0 Joseph Wu over 5 years ago in reply to Meera Mangaleshwaran

TI__Guru* 95945 points

Meera,

Here are a couple of options that you can use to further evaluate the ADS1118.

First, the ADS1118EVM does have the source code available, but I'm not sure what form it's in. It may actually be a LabView project. If you go to the EVM product folder here:

http://www.ti.com/tool/ADS1118EVM

Near the bottom, there are two links in the Software section. One is the GUI for the EVM, but the second is the Source code/firmware for the EVM. This may be something that you can modify.

Second, there is another EVM like board that is available. This is the ADS1118 BoosterPack. This is also a thermocouple centric board that is available at the following link:

http://www.ti.com/tool/430BOOST-ADS1118

For this board, there is a link to the firmware in the product page. This should have code that can be modified to change configurations and operation, but I don't think it has a GUI that can be displayed on a screen. To program and run the Boosterpack, I think you'll need the MSP430G2 LaunchPad Development kit, which you can find here:

http://www.ti.com/tool/MSP-EXP430G2

Joseph Wu

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ADS1118EVM: Require a comptabile upgraded driver.