mikeryan
commented
5 years ago cb_follow_le is a legacy callback that is not used. You will have to make your changes inside le_phy.c, probably by adding a field to the struct le_rx_t, polling the register inside le_DMA_IRQHandler, and finally finding a way to add it to the data sent over USB inside usb_enqueue_le. The actual channel is stored inside the global rf_channel and is stored in the le_rx_t struct for each packet. This is the absolute frequency in MHz (example: 2426 for advertising channel 38).
I am trying to use ubertooth-btle application with Ubertooth One in channel following mode for a defined access address. My attempt is to be able to easily read the frequency offset from the CC2400 whenever it receives a new data packet and display over the console along with frequency value. From my understanding of the code base, I can do this inside cb_follow_le by reading the FREQEST register from CC2400. What I am trying to understand is while I can see enqueue function being called to push the access address , but cant figure out where is the current channel/frequency value getting enqueued. Where should I be looking? Is my understanding of the code flow correct?