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CCS/TMS320F28335: transmit more than one 8byte data(multiple mailboxes) to dsp

Tejal gole
Prodigy 230 points

Part Number: TMS320F28335

Tool/software: Code Composer Studio

Hi, I want to send more than one mailboxes (more than 8 bytes) .I am able to send one mailboxes data to other dsp.but DSP not sending more than one mailboxes to other DSP. plz, help me for this.

  • 0
    TI__Guru* 95315 points

    Please take a look at the example CAN_MULTINT_A in my app.note SPRA876. 

  • 0 in reply to Hareesh Janakiraman
    Prodigy 230 points

    Hi, sir

    I want to send 32 bytes data from one dsp to other dsp.For this , I have used four mailboxes at RX anTX side. but at Rx (DSP) , It shows only first mailbox value .

    I have checked their IDs .Both the Rx and Tx mailboxes IDs are same.

  • 0 in reply to Hareesh Janakiraman
    Prodigy 230 points
    I am using two mailboxes, at Tx side and Rx side too. mailbox no.5,6 used for Transmit data. and at rx side mailbox no.1 and 2 for receive data.while running the program it is transmitting only mailbox 5 value and at rx side mailbox 1 and 2 receive same data Transmit from mailbox 5 only.(both mailbox 1 and 2 have receive same data ,even if mailbox id is different.
  • 0 in reply to Tejal gole
    TI__Guru* 95315 points
     and at rx side mailbox 1 and 2 receive same data Transmit from mailbox 5 only.(both mailbox 1 and 2 have receive same data ,even if mailbox id is different.
     
    What you are describing cannot happen. A message is accepted into one mailbox only.
     
    Are you using unique MSGIDs for a given mailbox pair? For example, use the same MSGID for MBX5 on the transmitter and MBX1 on the receiver. Use a different MSGID for MBX6 on the transmitter and MBX2 on the receiver.
     
    Familiarize yourself with Overwrite Protection Control (see my app.note for example). i.e. be aware that a message could be overwritten if a MBX is not protected.