CCS/MSP430FR6043: Switching signals

Maciej Kochman

Part Number: MSP430FR6043
Other Parts Discussed in Thread: MSP430WARE, , EVM430-FR6043, TDC1000, TDC7200, CAPTIVATE-PGMR

Tool/software: Code Composer Studio

Hello,

I've created a custom board with MSP430FR6043. I've used the "EVM430-FR6043" as an example. Now I'm using "USSSWLib_template_example" from "msp430ware_3_80_10_09" and I'm wondering how does the switching between transducers is operated. Do I have to switch the transducers between transactions by myself, or can it be done in the library (and how can I achieve this)?

Also I've been working with TDC1000 and TDC7200, and I understand why I get signals like this:

1.yellow- send signals

2.green - receive signal

But when I'm using the MSP, I'm getting different signals, like this:

yellow - J601
green - J602

1.Two signals

2. Signals on the left

3.Signals on the right

The pictures were taken when I didn't have the CH1_IN, CH0_IN and the transducers weren't connected to MSP, so I don't understand where the second signal is coming from.

Questions:

According to my first paragraph, what do I have to do to switch the transducers?
Where the second signal is coming from, if I don't have the transducers connected?

over 5 years ago

0 Leonardo Estevez over 5 years ago

TI__Genius 12615 points

Hi Maciej,

The muxing between upstream and downstream transducers is done by the library automatically. Although you're pictures didn't come through, I'll try to explain what I believe you are talking about. There is an upstream signal which is captured when the downstream transducer transmits to the upstream transducer. There is a downstream signal captured when the upstream transducer transmits to the downstream transducer. I recommend that you start working with the GUI example project first. Do you have your board configured for water or gas?

BR,
Leo

0 Maciej Kochman over 5 years ago in reply to Leonardo Estevez

Intellectual 380 points

Hi Leonardo,

I reuploaded the pictures, I hope you can see them now.

I was working with TDC1000 and TDC7200, so I understand how It supposed to work. I'm just trying to see if the excitation pulses are generated correctly, but I'm getting these weird signals on the receiving side. On the exact same time as the excitation pulses are generated without having the transducers connected to the board (These are presented on the last images). What are these signals?

About muxing, I was talking about having these "switches" that are controlled by RxSel1 and RxSel2 pins. These are the same as in "EVM430-FR6043". How can I control the switches, with the library, or with my own code?

About GUI. I have only the TDIO and CLK pins to connect to the "MSP430FR6043" due to the board size limitation I have, so I doubt that it is enough for GUI to work.

0 Leonardo Estevez over 5 years ago in reply to Maciej Kochman

TI__Genius 12615 points

Hi Maciej,

The RxSel1 and RxSel2 pins are controlled in this function:

USSLIB_HAL_configGPIOForCapture (you can modify the code in this function)

You might explore using this board to communicate with your custom board via USB(and with GUI):

https://www.ti.com/tool/CAPTIVATE-PGMR

It should only require a few pins.

BR,
Leo

0 Adam Kozlowski over 5 years ago in reply to Leonardo Estevez

Expert 1805 points

Hi Leonardo,

I would like to join the conversation.

I wonder, how is it possible to use a board you mentioned (CAPTIVATE-PGMR), to connect "custom board" to USSLib GUI?

Would you shed some light on it?
I have a custom board with MSP430FR6043 and I have external access to pins: SBWTDIO, SBWCLK, VDD, GND.

How can I connect my custom board to the CAPTIVATE-PGMR?
How can I run UssLib GUI to be able to connect to my custom board via CAPTIVATE-PGMR?

Regards,
Adam

0 Leonardo Estevez over 5 years ago in reply to Adam Kozlowski

TI__Genius 12615 points

Hi Adam,

If you refer to figure 315 at this link:

http://software-dl.ti.com/msp430/msp430_public_sw/mcu/msp430/CapTIvate_Design_Center/latest/exports/docs/users_guide/html/CapTIvate_Technology_Guide_html/markdown/ch_evm_CAPT_PGMR.html

HID Bridge SDA, SCL, and IRQ need to be connected for GUI interface. TST and RST should be connected for programming.

BR,

Leo

0 Adam Kozlowski over 5 years ago in reply to Leonardo Estevez

Expert 1805 points

Hi Leo,

Sounds reasonable.

Referring to EVM430-FR6043 schematic, please confirm that we don't need access to the UART while playing with the USSLib GUI.

See the highlighted region below.

Assuming we use the same pins to select RX and the same IN/OUT switching logic, do we need to change anything in the regular firmware or the GUI?

Where can I find sources to build firmware that can play with USSLib GUI?
I found such a project:
\ti\msp\UltrasonicWaterFR604x_02_40_00_00\examples\USS_Water_Demo
Is this?

Regards,
Adam

0 Leonardo Estevez over 5 years ago in reply to Adam Kozlowski

TI__Genius 12615 points

Hi Adam,

That's correct, the GUI communication is over I2C(not UART). Yes, the water demo includes source code which communicates with the GUI.This is a good starting point.

BR,
Leo

0 Adam Kozlowski over 5 years ago in reply to Leonardo Estevez

Expert 1805 points

Hi Leo,

Thank you very much.
Now, I have a comprehensive view.

Regards,
Adam

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CCS/MSP430FR6043: Switching signals