Hi everyone, I've had no success getting Arduino (Pro Mini 3.3V, 8MHz) to talk to an Si4455 over SPI.
I've gone through the process of generating the patch and config code. I've hacked the Si4455 library to dump the data is sees, and attached that (I hope it makes sense). I've been trying for four days now, so now I'm ready to ask for directions /
The SDO line appears to be floating at 1.5v (I've even tried pulling it up to 3.3v but that makes no diff). I thought there was an internal pull-up. Importantly, it seems the CTS (0xFF) is returned from the chip after each command, but all subsequent response bytes after that (where applicable) appears to be 0x00's.
Many thanks in advance...
BTW. I'm using the ZETA-915-SO from RF Solutions. Product details attached.
I'm seeing the same effect, and I'm trying to port the RF solutions example code to a different PIC chip using 'C' and in-line assembler. I can see the CTS line (on GPI01) toggling happily, but never see anything on the SDO line. Tried 3 different Zetas all the same so I don't think I've blown one up. I think it's that the Zeta isn't fully awake, although as I say the CTS line does toggle. That's down to it understanding what you send it I suppose. However without the SDO line working it's not going to be much of a transceiver! If you get anywhere, please let me know.