Hi there,
we are currently working on a project, where we like to send and receive a bitstream as fast as possible using two CC1101 at 868 MHz and in streaming mode, to gain "real-time" transmission.
The fastest solution for CC1101 is the 4-FSK with 600 kbps.
We used the recommended register settings and the sequency from AN095 and CC1101 datasheet (SWRS061F).
When sending via streaming mode and 600 kbps 4-FSK everything works fine. We are able to send defined packets, the clock and data-out line work as they should. We can use CC1101 development kit and SmartRF studio to see that our packets are correct. Here we have to enter RX mode and read out RXFIFO manually after successful received packages. Inside SmartRF 4-FSk is used as well.
Anyway when trying to use the streaming mode with 600 kbps and 4-FSK on RX side (of our own boards) the receiver shows strange behaviour: It receives the first databyte correctly- the clock works and the data line out shows also normal behaviour. But after the first datapacket the transceiver stops any activity until it is reset by a microcontroller. This happens every single time we try to receive anything, no matter if we have active packet controll or not.
On my own I would have thought about a failure on our side but:
1. Using SmartRF studio and continous RX in 4-FSKmode the CC1101 hangs up, too. Usually in continous RX the present RSSI is written to the graph several times a second- in 4-FSK independently from all the other setting (we have tried) there is no activity on the graph.
2. Using the same set-up between our own boards (or development kit), streaming from one to another while using MSK modulation with 500 kbps works fine in TX and RX.
So is there a generic problem with 4-FSK and streaming in combination?
Do you have an idea how to fix the problem or what we did wrong?
Best regards
Philipp