MSP430FR6047: Measurement time

Radek Petras

Part Number: MSP430FR6047
Other Parts Discussed in Thread: EVM430-FR6047

Im trying to measure with USS through USSLib (v. 2.20) and whole measurement takes about 200 ms. I made one GPIO to change value after every part of measurement process and its shown on osciloscope screen below. I use methods USS_configureUltrasonicMeasurement(&gUssSWConfig) - 120 ms, USS_initAlgorithms(&gUssSWConfig) - 15 ms, USS_startLowPowerUltrasonicCapture(&gUssSWConfig) - 10 ms, USS_runAlgorithms(&gUssSWConfig, &algorithms_Results) - 61 ms and flow rate addition to variables - 790 us. MCU is in LPM4.5 till next interrupt from RTC. Its normal for measurement to take so long?

So in conclusion, is it hardware or software problem or its usual behaviour?

Thanks

over 7 years ago

0 Eddie LaCost over 7 years ago

TI__Mastermind 47485 points

This does not seem like usual behavior. If you look at the TI Design for the EVM, table 7 shows the time in each state for a given configuration(table 6). Total time should be around 16ms.

http://www.ti.com/lit/ug/tidudn0/tidudn0.pdf

Are you using the EVM430-FR6047? Also, are you using the GUI to configure the device? If so, can you please send your configuration?

0 Radek Petras over 7 years ago in reply to Eddie LaCost

Prodigy 120 points

Im using custom PCB (schematic included in pdf). I use GUI to generate headers for measurement parameters. I changed frequency to 1.3 Mhz due to frequency sweep and exitation pulses to 20. I also modified type of measurement to water and changed type of oscilator to xtal and increased settling time to 4 ms (I included generated and edited headers)

5277.USS_userConfig.h MCUBoard.pdf

0 Eddie LaCost over 7 years ago in reply to Radek Petras

TI__Mastermind 47485 points

I don't immediately see anything wrong with your configuration. The schematic does not show what you have layed out for the transducer section. Is this the same as the EVM?

Have you tried your code on the EVM430-FR6047? That may help us quickly determine if this is a board issue.

0 Radek Petras over 7 years ago in reply to Eddie LaCost

Prodigy 120 points

Transducer section is same as on EVM. But I've tried same code on EVM and the measurement took nearly 1s. This is even worse than on our custom PCB. So it looks like software error. Still configuration of USS takes most of time so its really strange. Any advice?

0 Eddie LaCost over 7 years ago in reply to Radek Petras

TI__Mastermind 47485 points

Radek,

Sorry I have not looked into this yet. I am back in the office on the 19th and will take a look into what could be taking so long for the measurement.

0 Eddie LaCost over 7 years ago in reply to Eddie LaCost

TI__Mastermind 47485 points

Radek,

I just tested with the EVM and do not see similar timing. See attached image showing current consumption during a measurement. Have you made any changes to the firmware?

0 Radek Petras over 7 years ago in reply to Eddie LaCost

Prodigy 120 points

hmm.. Im really not sure now, if i modified it , but i thnink that i dont, i just changed the USS Config header for mine generated by USS Gui. But i cant find the GUI Demo somewhere to test it with surely unmodified version. Can you please provide me link? :) And thanks for your help, i hope we will manage to get it working soon

0 Eddie LaCost over 7 years ago in reply to Radek Petras

TI__Mastermind 47485 points

You can find the latest software at the link below. Be sure that you are downloading the "Water Demo Application" if you are using this with the GUI. You may also want to download the latest GUI which is packaged in the "USSSWLib" download.

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MSP430FR6047: Measurement time