how to bt_disable in NCS2.0.x?

[yoyou]

Hello,

nRF5340+nRF21540, NCS2.0.2, vscode.

void go_system_off(void)

{

    printk("%s system off \n", CONFIG_BOARD);

    nrf_gpio_cfg_input(NRF_DT_GPIOS_TO_PSEL(DT_NODELABEL(button0), gpios),NRF_GPIO_PIN_PULLUP);

    nrf_gpio_cfg_sense_set(NRF_DT_GPIOS_TO_PSEL(DT_NODELABEL(button0), gpios),NRF_GPIO_PIN_SENSE_LOW);

 

    pm_state_force(0, &si);

    k_msleep(100);

}

void main(void)

{

    int err = bt_enable(NULL);

    if (err) {

        printk("Bluetooth init failed (err %d)\n", err);

        return;

    }

    err=bt_disable();// return  0xFFFFFF7A

    printk("hello world! %X\n",err);

    go_system_off();

}

sleep mode take 433uA,

if don't do  bt_enable(),  it take 20uA

why?

    

Best regards

[Bendik Heiskel]

Hi,

There is two errata regarding the current draw in power down state for the nRF21540, Errata 13 and Errata 14.

Errata 13 may be the cause of this increased current consumption while in sleep mode. If any of the input pins are set high during sleep there will in some cases be a increase up to 500uA while in power down. The workaround for this is to make sure all the input pins( CSN, RX_EN, TX_EN, MODE, SCK, MOSI and ANT_SEL) are set low when entering sleep.

 

Best regards,

Bendik

[yoyou]

Hi,

thanks for reply, you are right.

i set PDN low, it will work well,

     

another question, how to set 21540 TX max power, and RX min power?

CSN connect to VDD. use GPIO mode.

demo\boards\nrf5340dk_nrf5340_cpuapp.overlay

/{
		pdn_21540: pdn_21540_ {
			status = "okay";
			gpios = < &gpio1 0x0b GPIO_ACTIVE_HIGH >; 
			label = "pdn_21540";
		};
		csn_21540: csn_21540_ {
			status = "okay";
			gpios = < &gpio1 0x0c GPIO_ACTIVE_HIGH >; 
			label = "csn_21540";
		};

		txen_21540: txen_21540_ {
			status = "okay";
			gpios = < &gpio1 0x07 GPIO_ACTIVE_HIGH >; 
			label = "txen_21540";
		};
		rxen_21540: rxen_21540_ {
			status = "okay";
			gpios = < &gpio1 0x05 GPIO_ACTIVE_HIGH >; 
			label = "rxen_21540";
		};
		antsel_21540: antsel_21540_ {
			status = "okay";
			gpios = < &gpio1 0x06 GPIO_ACTIVE_HIGH >; 
			label = "antsel_21540";
		};
		mode_21540: mode_21540_ {
			status = "okay";
			gpios = < &gpio1 0x04 GPIO_ACTIVE_HIGH >; 
			label = "_21540";
		};

	};
};

demo\child_image\hci_rpmsg.conf

# ------------FEM-------------------------------
CONFIG_BT_CTLR_ADVANCED_FEATURES=y
# CONFIG_BT_CTLR_TX_PWR_MINUS_20=y
CONFIG_BT_CTLR_TX_PWR_DYNAMIC_CONTROL=n

# CONFIG_MPSL_FEM_NRF21540_GPIO_SUPPORT=y
CONFIG_MPSL_FEM=y
CONFIG_MPSL_FEM_NRF21540_GPIO=y
CONFIG_MPSL_FEM_NRF21540_TX_GAIN_DB=20
CONFIG_MPSL_FEM_NRF21540_TX_GAIN_DB_POUTA=20
CONFIG_MPSL_FEM_NRF21540_TX_GAIN_DB_POUTB=10
CONFIG_MPSL_FEM_NRF21540_RX_GAIN_DB=0
CONFIG_MPSL_FEM_DEVICE_CONFIG_254=y
# CONFIG_MPSL_FEM_LOG_LEVEL_INF=1
# CONFIG_MPSL_FEM_LOG_LEVEL=3

   

Best regards

[Bendik Heiskel]

The nRF21540 RX gain is a fixed 13dB, it can not be configured in software. When using the nRF21540 with GPIO control the TX gain can be switched between 10 and 20dB using the MODE pin:

https://infocenter.nordicsemi.com/topic/ps_nrf21540/chapters/device_control/doc/tx_power_control.html?cp=7_0_0_4_3

The two gain settings controlled by the MODE pin can be changed by writing to the CONFREG2 and CONFREG3 registers in the UICR:

https://infocenter.nordicsemi.com/topic/ps_nrf21540/chapters/device_control/doc/uicr_program.html?cp=7_0_0_4_4

[yoyou]

Hi,

thanks for reply,

from datasheet I see.

CONFREG0
0x7D=1111101 (TX_GAIN=31, POUTA=20dB,TX=en)

when GPIO MODE , no connect  SPI to 21540,

how to write CONFREG0 to max power?

   

pins:

tx-en       set logic high,  enabled

rx-en       set logic low,   disabled

ant-sel     set logic low or connect to GND, use ANT1

mode       set logic low,   POUTA=20dB

above is means  (TX_GAIN=31, POUTA=20dB,TX=en,RX=disabed)  ?

   

Best regards

[yoyou]

Hi,

18day ago, no one reply?

[Bendik Heiskel]

Hi,

Sorry for not getting back to you sooner.

yoyou said:

CONFREG0
0x7D=1111101 (TX_GAIN=31, POUTA=20dB,TX=en)

when GPIO MODE , no connect  SPI to 21540,

how to write CONFREG0 to max power?

To write to CONFREG0 the a SPI connection is needed. With GPIO only the register cant be written to.

yoyou said:

pins:

tx-en       set logic high,  enabled

rx-en       set logic low,   disabled

ant-sel     set logic low or connect to GND, use ANT1

mode       set logic low,   POUTA=20dB

above is means  (TX_GAIN=31, POUTA=20dB,TX=en,RX=disabed)  ?

Yes, this pin configuration will give 20dBm output power in TX mode.

 

Best regards,

Bendik