how the ST25R3911B Discovery GUI knows the fact that the nucleo-l053R8 has read the message in the mailbox of ST25DV transmitted by the ST25R3911B Discovery GUI which is connected with the ST25R3911B-Disco?

[Wkeke.1]

 I'd like to discribe the devices which I try to demo my test.

    nucleo-l053R8 ,plugged with X-NUCLEO-NFC04A1 (embed with st25dv)

    ST25R3911B-Disco conneced with PC with the soft ST25R3911B Discovery GUI.

    then ,I want to test receiving a file transmitted from the ST25R3911B Discovery GUI .When I read the documentation for 

ST25R3911B Discovery GUI,I learned that ST25R3911B Discovery GUI will first partition the hole file to some segment,and then add 

a header int each segment combined to form a message which is sended one by one.what puzzles me is that how ST25R3911B Discovery GUI

get the fact the previous message has been read by the host and then it will transmit the next message?I think there is two possibilites

:just tranmitted in some time after previous transmittming or poll the regist of ST25DV by sending relevant cmd to the ST25R3911B-Disco?

Is it true.I need your help,thanks.

[Ulysses HERNIOSUS · Accepted solution]

Hi,

when you talk about the ST2R3911B Discovery GUI, do you mean the ST25 Tag Editor revision 2.3.1 which gets started from ST25R3911B Discovery GUI v1.2.8?

AFAIK the software/reader accesses MB_LEN to see if the I2C has emptied the mailbox and only then transmits.

Regards, Ulysses

[Wkeke.1]

Dear Ulysses

Thank you very much for your answers.It is true that what I talk about ST2R3911B Discovery GUI refers to ST25 Tag Editor revision 2.3.1 which gets started from ST25R3911B Discovery GUI v1.2.8.With your help,I have solved the puzzle^ _^.Thanks again.

Best wishes

keke