• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 15 subscribers
  • Views 245 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

cc1101

Shreyas Jayaprakash
Prodigy 20 points
Other Parts Discussed in Thread: CC1101

Hi,

We are doing a project using cc1101 for speed detection of a vehicle based on doppler effect.

1. What data can we get about the received signal from cc1101?

2. We want to know the frequency of the received signal. what can be done?

3. Is it possible to program cc1101 without development board?(we are using msp430 MCU)

Thanks.

Shreyas

 

  • 0
    TI__Mastermind 18780 points

    Hi,

    I am not sure what kind of data about the received signal from CC1101 you are looking for. Regarding the freq offset, under normal operation, the receiver demodulator  compensates for the offset between the transmitter and receiver frequency, within certain limits, by estimating the centre frequency of the received data. This value is available in the [FREQEST] status register. The tracking range of the algorithm is selectable as fractions of the receive channel bandwidth, using the [FOCCFG.FOC_LIMIT] configuration register. Depending on the speed of the vehicle and thus the freq shift, you will have to see if this is sufficient or if you have to use some kind of RSSI scanning. You can program the CC1101 without the develment board, but you need to connect it to your MCU by connecting the SPI interface, GND and VDD to the CC1101. Note that the TRXEB has a CC430, so this can also be used to test your code.

     

    Charlotte

  • 0 in reply to CHS
    Prodigy 20 points

    Thanks. Regarding the first query, I wanted to know what characteristics of the received signal can be obtained( like can i know the freq, voltage of received signal) ?