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CCS/CC1310: Alter the received frequency periodically of Rx

user5013901
Prodigy 130 points
Part Number: CC1310


Tool/software: Code Composer Studio

Hi, 

Because I have 2 transmitters which transmit the packet at different frequency (431 MHz and 432 MHz), could I receive their packets via only one board? For instance, could I change the received frequency periodically of Rx? I attempt to modify the code examples in CCS, "rfPacketRx.c" and "smartrf_settings.c" .

Here is the time slot of the receiver.

Thank you!

Best regards, 

  • 0
    TI__Guru**** 317180 points
    Yes, it's possible. When you want to change the frequency you have to close the RF driver and reopen it with the settings for the channel you want to switch to.
  • 0 in reply to TER
    Prodigy 130 points
    Hi TER,

    Thanks for your answering. Besides, could I request the solution or some guidelines to modify the original code? Thank you!

    Best regards,
  • 0 in reply to user5013901
    TI__Guru**** 317180 points
    If you look at the rfPacketRx example:

    rfHandle = RF_open(&rfObject, &RF_prop, (RF_RadioSetup*)&RF_cmdPropRadioDivSetup, &rfParams);

    opens the RF driver. You have to have one RF_cmdPropRadioDivSetup (with different name) for each frequency. The rfPacketErrorRate example show something like this in the Smartrf_settings files.

    Then run

    RF_postCmd(rfHandle, (RF_Op*)&RF_cmdFs, RF_PriorityNormal, NULL, 0);

    /* Enter RX mode and stay forever in RX */
    RF_EventMask terminationReason = RF_runCmd(rfHandle, (RF_Op*)&RF_cmdPropRx,
    RF_PriorityNormal, &callback,
    RF_EventRxEntryDone);

    After x seconds you can call RF_close and then RF_open again.