• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 16 subscribers
  • Views 774 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CCS/DLP-RF430BP: Problems running the „RF430CL330HTB – Concept for power supply“ example

Rese
Prodigy 20 points
Part Number: DLP-RF430BP
Other Parts Discussed in Thread: MSP-EXP430F5529LP

Tool/software: Code Composer Studio

Hello,

I want to power the MSP-EXP430FR5739LP + DLP-RF430BP via NFC from the MSP-EXP430F5529LP+TRF7970APB.

On the MSP- EXP430FR5739LP + DLP-RF430BP is a NDEF-“Send-a-message” program running, which sends a NDEF-message to a presented smartphone à this works.

On the MSP-EXP430F5529LP+TRF7970APB there is the “FF29LP_TFR7970A_All_NFC-MODES” code example running. I am able to write a NDEF message from the smartphone to this configuration and the sent message can be seen on the serial monitor in CCS. à this is also working.

Now I want to power the MSP- EXP430FR5739LP + DLP-RF430BP by the MSP-EXP430F5529LP+TRF7970APB and I expect the result of seeing the NDEF-example message in the serial monitor. à this is not working.

 

I found the „RF430CL330HTB – Concept for power supply“ description and want to try this with my configuration (I think it is working with the DLP-RF430BP as well, right?) . I added two Schottky-Diodes (1N5817) and a capacitor (4,7 µF, 10V), programmed the board as usual and removed the jumpers.

 

Now my questions:

1) When I program the board and add a not modified DLP-RF430BP, everything is working fine. If I change now the DLP-RF430BP to the modified version (with the diodes and the capacitor), the code is not running even if the jumpers are not removed and the board is powered via USB. Is this correct or should this configuration work (=sending NDEF messages to a smartphone) when everything is still powered via USB?

2) What is about the “optional 100u capacity”? Why is it optional? What happens if I choose a capacitor with a different size (as I actually did)? What happens if I do not include this optional capacity?

3) Have I chosen the wrong diodes?

4) Do you have any other ideas why this is not working? Have I missed something?

 

Thanks for your time!

  • 0
    TI__Guru*** 133325 points
    Hello Rese,

    Which version of the BoosterPack are you using? If I remember right, V2.0 comes with the capacitor and diodes already installed. SO you shouldn't need to modify anything and then such modifications might cause issues like what you observed.
  • 0 in reply to Ralph Jacobi
    Prodigy 20 points
    Hallo Ralph,
    thanks for the answer.

    Yes, I have v2.0 of the Boosterpack aln also found the capacitor and the diodes on it ;)
    The first try with reading a message with ne NFC-Player was successful, so I was able to read the sent message.
    Unfortunately it is not working with the "FF29LP_TFR7970A_All_NFC-MODES" code on CCS, I still see no message on the serial monitor. When I move the two antennas, I can see the flashing LED8 on the MSP-EXP430FR5739LP, so there seems to be a kind of energy transfer. But it is not enough to transfer the data...
    Is this a software/programming problem?

    If I want to try this with the RF430CL330HTB I have to do the fixes with the diodes and the capacitor?

    Thanks a lot!
    Rese
  • 0 in reply to Rese
    TI__Guru*** 133325 points
    Hello Rese,

    For the FF29LP_TFR7970A_ALL_NFC_MODES example, when using the TI NFC Tool GUI, update the "Listen Time (mSec)" to be lower. Try like 50mS or even 0 if you aren't using target mode.