How can I write data to the mailbox via the iOS App?

[CWies.1]

After the last update the app is not crashing anymore, But how can I write data to it via the App.

All toggles are not clickable. And the code example of the MX_NFC7_Process this function is completely empty.

I realized to read the status by copying the lines:

  NFC07A1_NFCTAG_ReadMBCtrl_Dyn( NFC07A1_NFCTAG_INSTANCE,&mbctrldynstatus );
  printf( "\n\r\n\rCtrl MB status register value:" );
  printf( "\n\rHost(i2c) Missed Message  = %d", mbctrldynstatus.HostMissMsg );
  printf( "\n\rRF(reader) Missed Message = %d", mbctrldynstatus.RFMissMsg );
  printf( "\n\rHost(i2c) Put Message     = %d", mbctrldynstatus.HostPutMsg );
  printf( "\n\rRF(reader) Put Message    = %d", mbctrldynstatus.RfPutMsg );
  printf( "\n\rMailbox Enable            = %d", mbctrldynstatus.MbEnable );

And I can modify the MbEnable bool via the app but I would like to write a message via the app. Is there a way to do so. Kind regards,

[victor laraison · Accepted solution]

you're right : mail box management display only shows the status of the mail box. You cannot interact with it.

If you are using a ST25DV Discovery board, you can read/write data by using the simple FTM protocol we implemented. 

For writing some datas :

- Select FTM icon on Discovery board

- in iOS NFC Tap : 

• read tag , then select "FTM demo" => 'FTM-Data Transfer' menus
• By default, "Write" Mailbox buffer is selected. 
• Enter Data to write in "write buffer" text field
• Enter number of byte to write
• then click start.... => This will write data into Mailbox then at the end , a read from mailbox is performed for checking data wrote. 

For reading some datas :

- Select FTM icon on Discovery board, then clik on 2nd icon on the bottom left (the one with text and pen). Enter a number of KB to transfer. "1" is enough then click return arrow.

- in iOS NFC Tap : 

• On iOS NFC Tap, then select "FTM demo" => 'FTM-Data Transfer' menus
• Deselect switch "write / read Mail box buffer" => This will allow read
• then click start ....=> This will read 1Kb from mailbox then display contents on buffer

Hope it helps

Br