samples/wifi/scan broken without programmed OTP

RE: samples/wifi/scan broken without programmed OTP

Simonr — Thu, 14 Sep 2023 14:20:29 GMT

Ah, okay. Sorry about the misunderstanding. I have reported this internally now, but if you want to set your MAC address manually without writing a MAC address onto the OTP memory, you can add the following to your main file (where the code snippet goes into the beginning of your main loop.

#include <zephyr/net/ethernet_mgmt.h>
#include <zephyr/net/ethernet.h>

		struct net_if *iface = net_if_get_default();
	char mac_addr_change[]={0x12, 0x34, 0x56, 0x78, 0x90, 0x12};
	struct ethernet_req_params params;
	int ret;

	memcpy(params.mac_address.addr, mac_addr_change, 6);
	net_if_down(iface);

	ret = net_mgmt(NET_REQUEST_ETHERNET_SET_MAC_ADDRESS, iface,
			&params, sizeof(struct ethernet_req_params));
	if(ret != 0) {
		LOG_ERR("unable to change mac address");
		return;
	}
	ret = memcmp(net_if_get_link_addr(iface)->addr, mac_addr_change,
			sizeof(mac_addr_change));
	if(ret != 0) {
		LOG_ERR("mac address change failed");
		return;
	}
	LOG_DBG("MAC changed to %x:%x:%x:%x:%x:%x\n", \
	mac_addr_change[0], mac_addr_change[1], mac_addr_change[2], \
	mac_addr_change[3], mac_addr_change[4], mac_addr_change[5]);
	net_if_up(iface);

Best regards,

Simon

RE: samples/wifi/scan broken without programmed OTP

JordanYates — Wed, 13 Sep 2023 10:17:18 GMT

I am not asking how to configure the OTP, I am notifying you that the sample is incorrect when it is not programmed.

Explicitly because the sample is attempting to handle that case, and failing.

RE: samples/wifi/scan broken without programmed OTP

Simonr — Wed, 13 Sep 2023 10:03:03 GMT

Our devices are shipped with the OTP memory access in the disabled state, so some steps are necessary to enable write/read access of the OTP, and to let you I.E. write a MAC address onto the nRF7002. This is described in this application note under OTP memory programming.

The following steps are required:

Set the protection registers (REGION.PROTECT[0..3]) to 0x50FA50FA to enable read/write access of the remaining OTP memory locations with the Wi-Fi Radio test command wifi_radio_ficr_prog otp_write_params 0x100 0x50FA50FA.
Reboot the device to finish enabling read/write access to the OTP memory.
Update the OTP memory registers described in various steps in Production line operations.
Set the OTP memory to protected state with the Wi-Fi Radio test command wifi_radio_ficr_prog otp_write_params 0x100 0x00000000.

Best regards,

Simon