Hello,
When we try to run the standard radio tests for bluetooth, we get really low power compared to what is expected (difference of about 32db). Turns out SW_CTRL0 was driving high by default even though there is no WiFi connection and we are not operating Wifi tests simultaneously (although CONFIG_NRF700X_RADIO_TEST is enabled).
From the nRF7002 v1.2 spec, page 23 has a note saying:
In that case, how can we switch SW_CTRL0 to low for the bluetooth tests?
I see there is this method but it requires CONFIG_NRF700X_RADIO_COEX=y. It looks like I can't enable it directly.
Looks like I need to define nrf_radio-coex in device tree. Do I need to use nrf-gpio-forwarder to forward pins?
nrf_radio_coex: nrf7002-coex {
status = "okay";
compatible = "nordic,nrf700x-coex";
req-gpios = <&gpio0 28 GPIO_ACTIVE_HIGH>;
status0-gpios = <&gpio0 30 GPIO_ACTIVE_HIGH>;
grant-gpios = <&gpio0 24 (GPIO_PULL_DOWN | GPIO_ACTIVE_LOW)>;
swctrl1-gpios = <&gpio0 29 GPIO_ACTIVE_HIGH>;
btrf-switch-gpios = <&gpio1 10 GPIO_ACTIVE_HIGH>;
};The primary doubt I have for this case is why SW_CTRL0 is driven high in the combo radio test build even when wifi radio testing functions are not actively used. We are trying to use the bluetooth radio test functions in this combo radio test build but not seeing the expected power because SW_CTRL0 is always enabling wifi antenna.
We assumed maybe enabling coex would enable some functions to switch antenna (ie the `sr_ant_switch` method) like below:
The primary doubt I have for this case is why SW_CTRL0 is driven high in the combo radio test build even when wifi radio testing functions are not actively used. We are trying to use the bluetooth radio test functions in this combo radio test build but not seeing the expected power because SW_CTRL0 is always enabling wifi antenna.
We assumed maybe enabling coex would enable some functions to switch antenna (ie the `sr_ant_switch` method) like below:
