nRF21540 is not compatible with nRF54L15

[Ziyao Zhou]

Hi,

Two month ago I have test nRF21540 and nRF54L15, they cannot word with each other.

However, I notice these days updated with

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/app_dev/device_guides/fem/index.html 

 

I have tried again but it still cannot work

My config is

#FEM general
CONFIG_MPSL_FEM=y
CONFIG_MPSL=y
CONFIG_MPSL_FEM_NRF21540_GPIO=y
CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y
CONFIG_MPSL_FEM_NRF21540_TX_GAIN_DB=20
CONFIG_MPSL_FEM_NRF21540_RX_GAIN_DB=13
CONFIG_MPSL_FEM_NRF21540_RUNTIME_PA_GAIN_CONTROL=y
CONFIG_BT_CTLR_TX_PWR_ANTENNA=20
# CONFIG_BT_CTLR_TX_PWR_PLUS_8=y

My overlay is:

/ {
	nrf_radio_fem: name_of_fem_node {
	   compatible  = "nordic,nrf21540-fem";
	   tx-en-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH>;
	   rx-en-gpios = <&gpio0 1 GPIO_ACTIVE_HIGH>;
	   pdn-gpios   = <&gpio0 2 GPIO_ACTIVE_HIGH>;
		mode-gpios   = <&gpio0 3 GPIO_ACTIVE_HIGH>;
 };
}; //54L15

[Einar Thorsrud]

Hi,

The nRF54L15 and nRF21540 are compatible. Can you expalin in more detail how it is not working?

[Ziyao Zhou]

There is no change on the RSSI when I connect as I shown

[Einar Thorsrud]

Can you elaborate on how you have connected it physically as well as the full configuration you are using?

[Ziyao Zhou]

Hi, sorry for the delay, I just find a time to test but I still cannot use the nRF21540,

My overlay is: 

&dppic10 {
	status = "okay";
};

&ppib11 {
	status = "okay";
};

&ppib21 {
	status = "okay";
};

&dppic20 {
	status = "okay";
};

&ppib22 {
	status = "okay";
};

&ppib30 {
	status = "okay";
};

&dppic30 {
	status = "okay";
};


/ {
	nrf_radio_fem: name_of_fem_node {
	   compatible  = "nordic,nrf21540-fem";
	   tx-en-gpios = <&gpio1 11 GPIO_ACTIVE_HIGH>;
	   rx-en-gpios = <&gpio1 12 GPIO_ACTIVE_HIGH>;
	   pdn-gpios   = <&gpio1 2 GPIO_ACTIVE_HIGH>;
		mode-gpios   = <&gpio1 3 GPIO_ACTIVE_HIGH>;
		tx-en-settle-time-us = <12>;
		rx-en-settle-time-us = <12>;
 };
}; //54L15

I have checked the document and it says:"Enable appropriate instances of the DPPIC and PPIB peripherals in the devicetree file" I have no idea about this so I have raise another ticket here

My config is:

#
# Copyright (c) 2018 Nordic Semiconductor
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

# Enable the UART driver
CONFIG_UART_ASYNC_API=y
CONFIG_NRFX_UARTE0=y
CONFIG_SERIAL=y

CONFIG_GPIO=y

# Make sure printk is printing to the UART console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y

CONFIG_HEAP_MEM_POOL_SIZE=2048

CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_NAME="ZDynamic test beacon"
CONFIG_BT_MAX_CONN=1
CONFIG_BT_MAX_PAIRED=1

# Enable the NUS service
CONFIG_BT_NUS=y

# Enable bonding
CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y

# Enable DK LED and Buttons library
CONFIG_DK_LIBRARY=y

# This example requires more stack
CONFIG_MAIN_STACK_SIZE=1152
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# Config logger
CONFIG_LOG=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=n
CONFIG_LOG_PRINTK=n

CONFIG_ASSERT=y


# #FEM EKEK
# CONFIG_MPSL_FEM=y
# CONFIG_MPSL=y
# # CONFIG_MPSL_FEM_NRF21540_GPIO=y
# # CONFIG_MPSL_FEM_NRF21540_GPIO_SPI=y EK用不上
# CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y
# CONFIG_MPSL_FEM_NRF21540_TX_GAIN_DB=20
# CONFIG_MPSL_FEM_NRF21540_RX_GAIN_DB=13
# CONFIG_BT_CTLR_TX_PWR_ANTENNA=20


#
# Copyright (c) 2018 Nordic Semiconductor
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#

# Enable the UART driver
CONFIG_UART_ASYNC_API=y
CONFIG_NRFX_UARTE0=y
CONFIG_SERIAL=y

CONFIG_GPIO=y

# Make sure printk is printing to the UART console
CONFIG_CONSOLE=y
CONFIG_UART_CONSOLE=y

CONFIG_HEAP_MEM_POOL_SIZE=2048

CONFIG_BT=y
CONFIG_BT_PERIPHERAL=y
CONFIG_BT_DEVICE_NAME="ZDynamic test beacon"
CONFIG_BT_MAX_CONN=1
CONFIG_BT_MAX_PAIRED=1

# Enable the NUS service
CONFIG_BT_NUS=y

# Enable bonding
CONFIG_BT_SETTINGS=y
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y

# Enable DK LED and Buttons library
CONFIG_DK_LIBRARY=y

# This example requires more stack
CONFIG_MAIN_STACK_SIZE=1152
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# Config logger
CONFIG_LOG=y
CONFIG_USE_SEGGER_RTT=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG_BACKEND_UART=n
CONFIG_LOG_PRINTK=n

CONFIG_ASSERT=y


# #FEM EKEK
# CONFIG_MPSL_FEM=y
# CONFIG_MPSL=y
# # CONFIG_MPSL_FEM_NRF21540_GPIO=y
# # CONFIG_MPSL_FEM_NRF21540_GPIO_SPI=y EK用不上
# CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y
# CONFIG_MPSL_FEM_NRF21540_TX_GAIN_DB=20
# CONFIG_MPSL_FEM_NRF21540_RX_GAIN_DB=13
# CONFIG_BT_CTLR_TX_PWR_ANTENNA=20


#FEM general
CONFIG_MPSL_FEM=y
CONFIG_MPSL=y
CONFIG_MPSL_FEM_NRF21540_GPIO=y
CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=y
CONFIG_MPSL_FEM_NRF21540_TX_GAIN_DB=20
CONFIG_MPSL_FEM_NRF21540_RX_GAIN_DB=13
CONFIG_MPSL_FEM_NRF21540_RUNTIME_PA_GAIN_CONTROL=y
CONFIG_BT_CTLR_TX_PWR_ANTENNA=20
CONFIG_NFCT_PINS_AS_GPIOS=y
# CONFIG_BT_CTLR_TX_PWR_PLUS_8=y

I have remove R21 R22 and short R33 R34. I have also added CONFIG_NFCT_PINS_AS_GPIOS =y

The real diagram is like this:

Could you help ne using nRF21540 on nRF54L15, thank you so much!