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CC1110 transmit problems

jack chen2
Expert 1240 points
Other Parts Discussed in Thread: CC1200, CC1120

Hi All,

 

I want to do a special usage with CC1110, but I don’t know how to achieve that.

Please give me a hand or some recommends of this.

The special usage need CC1110 carrier out data in a short time(about 5s). CC1110 retransmit the same data packet over the air in this short time. And I hope the CC1110 still carrier out dummy data in the gap time between Tx packet.

I try to use Asynchronous Serial Mode(swra316a) to do this and its worked, but the problems is the baud rate need create by MCU and expend 2 GPIO.

So I want to do the same function on FIFO mode(Packet mode) but I don’t know how to achieve that.

I try to reduce the time between transmit packet (TXOFF mode = SFSTXON, calibration off), but the CC1110 will carrier off in the gap between transmission.

Can I use TXOFF mode = STX to solve this issue ? If yes, please give me some recommends to do that?

Please kindly let me know If my description not clarify.

 

Thanks for your help.

BR, 

Jack

  • 0
    TI__Guru* 86241 points

    Hi Jack

    You should set TXOFF_MODE = TX. The radio will then start sending preamble again as fast as the current packet is transmitted. A new TX strobe will be issued internally in between every packet restarting TX and reloading some registers. I know that on the CC1120/CC1200 this takes about 4 symbols time, but not sure how long this time is on the CC1110. In this small period of time when TX is restarted I am not sure if a carrier is sent or if radio transmission is off.

    BR

    Siri

  • 0 in reply to Siri
    Expert 1240 points

    Hi Siri,

    Thanks for your reply! 

    I will try to put on my code, and test again.

    BR,

    Jack