MSP430FR6043: Problem with limits

Andrey Dolya

Part Number: MSP430FR6043

Good day.
Our company develops new gas meters and we want to use your controller MSP430FR6043. We have several questions:
1. When the values of the time difference between the flow and against the flow (Delta TOF) of about 20,000 ns, there is a limitation in the calculation of flow. Is it possible to expand the range?
2. Is it possible to set the frequency of the probe pulses (Pulse output frequency) to 100 kHz? We can’t to set this frequency using the USSWLib library.

over 4 years ago

0 Leonardo Estevez over 4 years ago

TI__Genius 12615 points

Hi Andrey,

Please find answers below:

1. The maximum dToF shift can be increased by increasing USS_ALG_MAX_SAMPLE_SHIFT in the USS_userConfig.h file from 20 to a larger number.

2. The minimum supportable frequency of the FR6043 PPG is 133kHz.

BR,
Leo

0 Andrey Dolya over 4 years ago in reply to Leonardo Estevez

Prodigy 90 points

Hello Leonardo!
Thank's a lot. Your answer to the first question was useful. The minimum possible value of the PPG frequency that we were able to set is 160kHz. Could you tell us what we are doing wrong?

Best regards,

Andrew.

0 Leonardo Estevez over 4 years ago in reply to Andrey Dolya

TI__Genius 12615 points

Hi Andrew,

You need to reduce the HSPLL frequency to 68MHz. This will also give you a lower sampling frequency.

BR,
Leo

0 Andrey Dolya over 4 years ago in reply to Leonardo Estevez

Prodigy 90 points

Hello Leo!
The USS_HSPLL_FREQ_IN_MHZ parameter in the USS_userConfig.h file was set to 68, but this was not enough. What have I done wrong? What more needs to be done?

BR,

Andrey

0 Leonardo Estevez over 4 years ago in reply to Andrey Dolya

TI__Genius 12615 points

Hi Andrey,

If you are running from the header files, you can't update via the GUI and expect the same parameters to be there. You should export the header files from the GUI into your project and then change the HSPLL setting before rebuilding. You can then connect to the GUI and capture an ADC signal to confirm you are getting the lower sampling frequency. Please note that the sampling frequency should also be reduced from 1000 to 850.

BR,

Leo

0 Andrey Dolya over 4 years ago in reply to Leonardo Estevez

Prodigy 90 points

Hello Leonardo!

1. Set the parameters in the USS Design Center and create header files.

2. Compiled and programmed the project in the EVM430FR6043 board

3. Errors appear when trying to connect to the MCU.

Attach the config file:

3755.USS_userConfig.h

BR,

Andrey

0 Leonardo Estevez over 4 years ago in reply to Andrey Dolya

TI__Genius 12615 points

Hi Andrey,

I noticed that you are using a previous release of the GUI. Please download the latest version of the software and GUI(and reflash your board) - these can be found here:

http://software-dl.ti.com/msp430/msp430_public_sw/mcu/msp430/USSSWLib/USSSWLibGas/latest/

If the GUI version is out of sync with the image on the EVM, the generated header files may not work properly.

BR,
Leo

0 Andrey Dolya over 4 years ago in reply to Leonardo Estevez

Prodigy 90 points

Hi, Leonardo,

I did everything as you said. I installed a new version of the software. Now it is not possible to set the parameter (signal sampling frequency) to 850.

BR,

Andrey

0 KC Xu over 4 years ago in reply to Leonardo Estevez

TI__Intellectual 1995 points

Hi Leo,

Any more suggestion for this question? thanks.

regards

0 Leonardo Estevez over 4 years ago in reply to KC Xu

TI__Genius 12615 points

HI Andrey,

We don't currently support this lower sampling rate in our GUI. I'm working with our developers to determine when this might be changed.

BR,
Leo

0 Leonardo Estevez over 4 years ago in reply to Leonardo Estevez

TI__Genius 12615 points

Hi Andrey,

In the mean time, I've confirmed that you should be able to set the HSPLL frequency to 68MHz and the USS_F1_FREQ to 134000 in the USS_userConfig.h file and connect with the GUI to get ADC captures and Waveform data. You won't be able to set the lower excitation frequency if you try to request and update through this version of the GUI. The previous version of the GUI should allow it.

BR,
Leo

0 Andrey Dolya over 4 years ago in reply to Leonardo Estevez

Prodigy 90 points

Hi, Leo

If you help to resolve this issue, we will be grateful to you!

BR,
Andrey

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MSP430FR6043: Problem with limits