Skip to main content
Naoto.Tokuda
Associate
December 27, 2022
Solved

Communication error when sending data in Fast Transfer Mode

  • December 27, 2022
  • 2 replies
  • 795 views

When using Send Data in Fast Transfer Mode with ST25DV64KC-DISCO and Android App ST25 Tap, communication will stop with an error if the data size is 200000 bytes.

Is there a limit on communication size?

This topic has been closed for replies.
Best answer by Olivier L

Hi,

No there is no limit on communication size. The FTM protocol can work with any data size.

On Firmware side, there is an arbitrary limit set to 128k but it can be changed. This threshold has been used because this FTM protocol was originally used for Firmware Upgrade feature (it corresponds to the max Flash size available).

If your firmware is a fork of the ST25DV64KC-DISCO firmware, you can remove this threshold.

Best regards

2 replies

Olivier L
Olivier LBest answer
ST Employee
January 17, 2023

Hi,

No there is no limit on communication size. The FTM protocol can work with any data size.

On Firmware side, there is an arbitrary limit set to 128k but it can be changed. This threshold has been used because this FTM protocol was originally used for Firmware Upgrade feature (it corresponds to the max Flash size available).

If your firmware is a fork of the ST25DV64KC-DISCO firmware, you can remove this threshold.

Best regards

Naoto.Tokuda
Associate
January 31, 2023

Thank you for your answer.

Understood.​