Receiver Detection of Coded Phy Packets

RE: Receiver Detection of Coded Phy Packets

AMarch01 — Fri, 17 Jan 2025 22:23:09 GMT

Ah, you really have to pay attention to the wording in the MODE register definition (6.20.14.48). I don't think I really would have noticed that till you put it up in my face.

Kind of would be nice if it was summarized as "Setting Long Range Receive mode can be 5 or 6." or simply just write "Put a 5 in MODE for long range Receive", and just ignore the other value.

Thanks again.

RE: Receiver Detection of Coded Phy Packets

AMarch01 — Fri, 17 Jan 2025 22:14:23 GMT

Thanks Emil!
As you may or may not know, I am down this rabbit hole based on your post from before with the low-level direct packet c code you presented.

I converted some of your code to the pre-built functions in the zephyr functions but mostly what you were doing ...

For example, to configure my receiver I use the following:

    volatile uint8_t phy = PHY_CODED;
    volatile uint8_t flags = PHY_FLAGS_S8 ;
    flags |= RADIO_PKT_CONF_PHY(phy);

	radio_phy_set(phy, flags);
	radio_pkt_configure(RADIO_PKT_CONF_LENGTH_8BIT, PDU_AC_LEG_PAYLOAD_SIZE_MAX,
			    RADIO_PKT_CONF_PHY(phy));

It's been fun. Thanks for the starting point.

RE: Receiver Detection of Coded Phy Packets

Emil Lenngren — Fri, 17 Jan 2025 21:59:28 GMT

The product specification says "Long range 125 kbit/s TX, 125 kbit/s and 500 kbit/s RX" for Ble_LR125Kbit and "Long range 500 kbit/s TX, 125 kbit/s and 500 kbit/s RX" for Ble_LR500Kbit. So in RX mode, the two options are equivalent. The Coding Indicator field in the packet is used to select rate.