Fanstel BlurNor BT840 Series User manual

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
BluNor BT840F is a powerful, highly flexible, ultra low power Bluetooth Low Energy (BLE) using Nordic
nRF52840 SoC. With an ARM CortexTM M4F MCU, available 1MB flash, 256KB RAM, embedded 2.4GHz multi-
protocol transceiver, and an integrated PCB trace antenna or u.FL connector for an external antenna. A power
amplifier is integrated in BT840X and BT840XE to increase Bluetooth range. It allows faster time to market with
reduced development cost.
Bluetooth ranges are measured in environments with Low Multiple Path Interference
(LMPI) and antenna at 5 feet (1.52 meters), typical height of thermostat in the USA.
Ranges for LMPI, correlating to actual link budget, indicates the Bluetooth signal
strength for penetrating walls in buildings.
Specifications: !
nRF52840 QIAA, ARM Cortex M4F, 64 MHz
ARM® TrustZone® Cryptocell-310 co-processor
Complete RF solution with integrated antenna
BLE 5 data rate: 2Mbps, 1Mbps, 500kbps,
125kbps.
IEEE 802.15.4 Thread and Zigbee data rate: 250
Kbps
2.4 GHz proprietary data rate: 2 Mbps, 1 Mbps
DC-DC converter, inductors on board.
Direct powered by Lithium batteries or USB
supply (up to 5.5V)
Serial Wire Debug (SWD)
Nordic SoftDevice Ready
Over-the-Air (OTA) firmware update
Flash/RAM: 1MB/256KB.
48 General purpose I/O pins
USB 2.0 full speed (12 Mbps) controller
QSPI 32 MHz interface
High speed 32 MHz SPI
Type 2 NFC-A tag with wake-on field, Touch-to-
pair support
Programmable peripheral interconnect (PPI)
12 bit/200 Ksps ADC, 8 configurable channels
with programmable gain
64 level comparator
15 level comparator with wake-up from OFF
mode
Temperature sensor
4x4-channel pulse width modulator (PWM)
Audio peripherals: I2S, digital microphone
interface (PDM)
5 x 32 bit timers with counter mode
Up to 4x SPI masters/3x SPI slaves
Up to 2x I2C compatible 2-wire masters/slaves
2x UART (CTS/RTS)
Quadrature Demodulator (QDEC)
3x real time counters (RTC)
128-bit AES HW encryption
SoC Receiver Sensitivity: -96 dBm at 1Mbps
SoC TX power: programmable +8dBm to
-20dBm. Up to +6 dBi antenna gain.
Hybrid pins: 16 castellated and 45 LGA.
Integrated PCB trace antenna or u.FL connector
Operation voltage: 1.7V to 5.5V
BT840,BT840F, BT840E, BLE and 802.15.4
certifications
Operation temperature: -40°C to +85°C
QDID: 108621
Model Summaries
module
BT840F
BT840
BT840E
BT840X
BT840XE
SoC
nRF52840-QIAA
nRF52840-QIAA
nRF52840-QIAA
nRF52840-QIAA
nRF52840-QIAA
Size
15x20.8x1.9mm
14x16x1.9mm
14x16x1.9mm
15x28.0x1.9mm
15x28.0x1.9mm
BT Antenna
PCB trace
PCB trace
ANT006
PCB trace + PA
PA+ANT000
Max TX
+8.46 dBm
+8.46 dBm
+8.46 dBm
+22.6 dBm
+21.0 dBm
32.768 sleep crystal
External
External
External
Integrated
Integrated
BT range,1 Mbps, LMPI
1000 meters
150 meters
1170 meters
1170 meters
BT range, 1Mbps, 1.52m
390 meters
120 meters
900 meters
1170 meters
BT range, 125 Kbps, LMPI.
2300 meters
320 meters
3400 meters, est.
>4500 meters
>4500 meters
BT range, 125 kBps, 1.52m
640 meters
210 meters
1240 meters
1920 meters
FCC ID
X8WBT840F
X8WBT840F
X8WBT840F
X8WBT840X
X8WBT840X
IC ID
4100A-BT840F
4100A-BT840F
4100A-BT840F
4100A-BT840X
4100A-BT840X
CE
Certified
Certified
Certified
Certified
Certified
RCM
Certified
Certified
Certified
Certified
Certified
TELEC
201-190710/00
201-190710/00
201-190710/00
Availability
Production
Production
Production
Production
Production
1

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
Table Of Contents
1. Introduction 3........................................................................................................................................................
BT840F 3..............................................................................................................................................................
BT840 4................................................................................................................................................................
BT840E 4..............................................................................................................................................................
BT840X 4..............................................................................................................................................................
BT840XE 4...........................................................................................................................................................
2. Codes Development Using Nordic Tools 5...........................................................................................................
Over-The-Air DFU 5.............................................................................................................................................
SoftDevices 5.......................................................................................................................................................
Development Tools 5............................................................................................................................................
3. Product Descriptions 6.........................................................................................................................................
Block Diagram of nRF52840 6.............................................................................................................................
ARM Trustzone CryptoCell 310 7.........................................................................................................................
Mechanical Drawings 9........................................................................................................................................
Pin Assignments of BT840 12..............................................................................................................................
Pin Function 14.....................................................................................................................................................
Mounting BT840F on the Host PCB 16................................................................................................................
Host Board Design for Low Cost or Long Range 17............................................................................................
Control Skyworks Power Amplifier 18...................................................................................................................
4. Bluetooth Range Measurements 22.....................................................................................................................
5. AT Commands 24.................................................................................................................................................
6. BT840F Evaluation Board 24...............................................................................................................................
Nordic Development Tools 25...............................................................................................................................
Android OS Apps 25.............................................................................................................................................
iOS Apps 25..........................................................................................................................................................
BT840F V4 EvaluationBoard Schematics 26.......................................................................................................
Suggestion for Battery Power Application 27.......................................................................................................
7. Miscellaneous 28..................................................................................................................................................
Soldering Temperature-Time Profile for Re-Flow Soldering 28............................................................................
Cautions, Design Notes, and Installation Notes 28..............................................................................................
Packaging and Lot Number 32.............................................................................................................................
FCC Label 32.......................................................................................................................................................
Revision History 33..................................................................................................................................................
Contact Us 34..........................................................................................................................................................
2

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
1. Introduction
BluNor BT840F Series are powerful, highly flexible, ultra low power wireless modules using Nordic nRF52840
SoCs. With an ARM CortexTM M4F MCU, 1MB flash, 256KB RAM, embedded 2.4GHz multi-protocol
transceiver, and an integrated antenna, it allows faster time to market with reduced development cost.
The following is a block diagram of BT840F. Antenna circuit and main clock are integrated. All 48 GPIOs of
nRF52840 can be accessed from main board. For lower power consumption at idle state, a 32.768 kHz crystal
can be added on the host board. Connection to an external NFC (Near Field Communication) antenna is
provided.
BlurNor BT840F is a sister module of BT832F. The physical size is the same. There are 21 additional LGA pins
for additional GPIOs provided by nRF52840.
There are 3 modules in the BT840F Series.
BT840F
• Uses an nRF52840 QIAA with Cortex M4F MCU
• 1MB flash, 256 KB RAM
• Supports NFC
• Integrated PCB trace range antenna. Bluetooth range is 1000 meters at 1Mbps and
2300 meters at 125 Kbps measured in environments with low RF and multiple path
interferences.
• Size: 15x20.8x1.9mm.
3

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
BT840
• Uses an nRF52840 QIAA with Cortex M4F MCU
• 1MB flash, 256 KB RAM
• Supports NFC
• Integrated PCB trace range antenna.
• Size: 14x16x1.9mm.
BT840E
• Uses an nRF52840 QIAA with Cortex M4F MCU
• 1MB flash, 256 KB RAM
• Supports NFC
• An u.FL connector for external antenna. Certified with Fanstel ANT060 antenna.
• Maximum TX power is +14.6 dBm with ANT060 antenna.
• Size: 14x16x1.9mm.
BT840X
• Uses an nRF52840 QIAA with Cortex M4F MCU
• 1MB flash, 256 KB RAM
• Supports NFC
• Integrated SKY66112 power amplifier
• Integrated 32.768 KHz sleep crystal
• Integrated PCB trace antenna
• Size: 15x28x1.9mm.
BT840XE
• Uses an nRF52840 QIAA with Cortex M4F MCU
• 1MB flash, 256 KB RAM
• Supports NFC
• Integrated SKY66112 power amplifier.
• Integrated 32.768 KHz sleep crystal.
• An u.FL connector for external antenna. Certified with Fanstel ANT000 antenna.
• Size: 15x28x1.9mm.
4

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
2. Codes Development Using Nordic Tools
Development tools by Nordic and other third party development tools recommended by Nordic should be used.
Nordic development environment for nRF52840 offers a clean separation between application code
development and embedded protocol stacks. This means compile, link and run time dependencies with the
embedded stack and associated debugging challenges are removed. The Bluetooth low energy and ANT stack
is a pre-compiled binary, leaving application code to be compiled stand-alone. The embedded stack interface
uses an asynchronous and event driven model removing the need for RTOS frameworks.
Over-The-Air DFU
The nRF52840 is supported by an Over-The-Air Device Firmware Upgrade (OTA DFU) feature. This allows for
in the field updates of application software and SoftDevice.
SoftDevices
The Nordic protocol stacks are known as SoftDevices and complement the nRF52 Series SoCs. All nRF52
Series are programmable with software stacks from Nordic. This bring maximum flexibility to application
development and allows the latest stack version to be programmed into the SoC.
SoftDevices available from Nordic:
S140: Bluetooth low energy concurrent central/peripheral/observer/broadcaster stack.
Development Tools
Nordic Semiconductor provides a complete range of hardware and software development tools for the nRF52
Series devices. nRF52 DK board is recommended for firmware development.
Nordic software development tools can be downloaded from the following webpage.
http://infocenter.nordicsemi.com/index.jsp?topic=/com.nordic.infocenter.nrf52/dita/nrf52/development/
nrf52_dev_kit.html&cp=1_1
5

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
3. Product Descriptions
Brief description of nRF52840 SoC is provided. For full description of the SoC, please download from Nordic
Semiconductor website.
https://www.nordicsemi.com/eng/Products/Bluetooth-low-energy
Block Diagram of nRF52840
The following is a block diagram of Nordic nRF52840 Bluetooth Low Energy (BLE) SoC. Arrows with white
heads indicate signals that share physical pins with other signals.
6

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
The 32 bit ARM Cortex M4F MCU with hardware supports for DSP instructions and floating point operations,
code density and execution speed are higher than other Cortex M MCU. The Programmable Peripheral
Interconnect (PPI) system provides a 20-channel bus for direct and autonomous system peripheral
communication without CPU intervention. This brings predictable latency times for peripheral to peripheral
interaction and power saving benefits associated with leaving CPU idle. The device has 2 global power modes
ON/OFF, but all system blocks and peripherals have individual power management control which allows for an
automatic switching RUN/IDLE for system blocks based only on those required/not required to achieve
particular tasks.
The radio supports Bluetooth low energy and ANT. Output power is scalable from a maximum of +8dBm down
to -20 dBm in 4dB steps. Sensitivity is increased to -96 dBm to -89 dBm, depending on data rate. Sensitivity for
BLE is -96 dBm, and -92.5 dBm for ANT.
The NFC block supports NFC-A tags with proximity detection and Wake-on-field from low power mode. The
NFC enables Out-Of-Band (OOB) Bluetooth pairing of devices and thus greatly simplifying deployment.
ARM Trustzone CryptoCell 310
ARM® TrustZone® CryptoCell-310 co-processor is a security subsystem which provides Root of Trust (RoT) and
cryptographic services for a device. CryptoCell services are available to the application through a software library API, not
a hardware register interface.
The following cryptographic features are provided.
7

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
• FIPS-140-2 certified True Random Number Generator (TRNG)
• RSA asymmetric encryption
Up to 2048 bit key size
PKCS#1 v2.1/v1.5
Optional CRT support
• Elliptic curve cryptography (ECC)
NIST FIPS 186-4 recommended curves using pseudo-random parameters, up to 521 bits:
➢Prime field: P-192, P-224, P-256, P-384, P-521
SEC 2 recommended curves using pseudo-random parameters, up to 521 bits:
➢Prime field: P-160, P-192, P-224, P-256, P-384, P-521
Koblitz curves using fixed parameters, up to 256 bits:
➢Prime field: P-160, P-192, P-224, P-256
Edwards/Montgomery curves:
➢Ed25519, Curve 25519
ECDH/ECDSA support
• Secure remote password protocol (SRP)
Up to 3072 bit operations
• Hashing functions
SHA-1, SHA-2 up to 256 bit size
keyed-hash message authentication code (HMAC)
• AES symmetric encryption
General purpose AES engine (encrypt/decrypt, sign/verify)
128 bit key size
Supported encryption modes: ECB, CBC, CMAC/CBC-MAC, CTR, CCM/CCM*.
• ChaCha20/Poly1305 symmetric encryption
Supported keyed size: 128 and 256 bits
Authenticated encryption with associated data (AEAD) mode
8

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
Mechanical Drawings
The followings are mechanical drawings of BT840F and BT832F. The physical sizes of both are the same,
15x20.8x1.9mm. Except the 19 pins in solid black dots, BT840F and BT832F is hardware pin to pin compatible.
Firmware configuration is required to perform the same function.
Two types of pins are available to meet different application requirements.
• 16 castellated pins for application needing limited number of IOs. SMT equipment is not required for
soldering castellated pins.
• 45 LGA (Land Grid Array) pins to access all 48 GPIOs of nRF52840 when needed.
BT840F and BT832F Mechanical drawings, top view
9

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
BT840 and BT840E mechanical drawings, top view.
10

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
BT840X and BT840XE mechanical drawings
11

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
Pin Assignments of BT840
The followings are BT840 pin assignment. Pin functions are in a table in next section. Please refer to Nordic
nRF52840 Product Specifications for detailed descriptions and features supported.
https://www.nordicsemi.com/eng/Products/nRF52840
BT840F pins is a super set of that of BT832F. A PCB developed for BT832 Series can be used for BT840
Series and vice versa.
BT832F pin assignments.
12

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
BT840F pin assignments
13

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
Pin Function
BT840
52840
BT832
52832
pin#
pin#
pin name
pin#
pin#
pin name
Descriptions
1
G1
P0.26/SDA
1
38
P0.26
GPIO, configured as I2C SDA on EV-BT840
2
H2
P0.27/SCL
2
39
P0.27
GPIO, configured as I2C SCL on EV-BT840
3
D2
P0.00/XL1
3
2
P0.00/XL1
GPIO, connection for 32.768kHz crystal
4
F2
P0.01/XL2
4
3
P0.01/XL2
GPIO, connection for 32.768kHz crystal
5
A12
P0.02/AIN0
5
4
P0.02/AIN0
GPIO, Analog input
6
B13
P0.03/AIN1
6
5
P0.03/AIN1
GPIO, Analog input
7
L24
P0.09/NFC1
7
11
P0.09/NFC1
GPIO, NFC antenna connection
8
J24
P0.10/NFC2
8
12
P0.10/NFC2
GPIO, NFC antenna connection
9
B1
VDD
9
13
VDD
DC supply 1.7V to 3.6V
10
B7
GND
10
45
VSS
Ground
11
T2
P0.11
11
16
P0.13
GPIO
12
AD22
P1.00
12
21
P0.18
GPIO
13
AD8
P0.13
13
23
P0.20
GPIO
14
AC13
P0.18/RESET
14
24
P0.21/RESET
GPIO, internal RC reset circuit, configurable as
RESET pin
15
AA24
SWDCLK
15
25
SWDCLK
Serial Wire Debug clock input
16
AC24
SWDIO
16
26
SWDIO
Serial Wire Debug I/O
Z0
B19
P1.11
GPIO
Z1
B17
P1.12
GPIO
Z2
A16
P1.13
GPIO
Z3
B15
P1.14
GPIO
Z4
A14
P1.15
GPIO
Z5
A20
P1.10
GPIO
Z6
R24
P1.06
GPIO
A0
GND
A0
45
VSS
Ground
A1
B11
P0.28/AIN4
A1
40
P0.28/AIN4
GPIO, Analog input
A2
A10
P0.29/AIN5
A2
41
P0.29/AIN5
GPIO, Analog input
A3
J1
P0.04/AIN2
A3
6
P0.04/AIN2
GPIO, Analog input
A4
K2
P0.05/AIN3
A4
7
P0.05/AIN3
GPIO, Analog input
A5
M2
P0.07
A5
9
P0.07
GPIO
A6
P2
P1.08
GPIO
B0
GND
B0
45
VSS
Ground
B1
AC21
P0.25
B1
37
P0.25
GPIO
B2
B9
P0.30/AIN6
B2
42
P0.30
GPIO
B3
A8
P0.31/AIN7
B3
43
P0.31
GPIO
B4
L1
P0.06
B4
8
P0.06
GPIO, NC for BT840X, BT840XE, PA control
B5
N1
P0.08
B5
10
P0.08
GPIO, NC for BT840X, BT840XE, PA control
B6
V23
P1.03
GPIO
C0
GND
C0
45
VSS
Ground
C1
AD20
P0.24
C1
29
P0.24
GPIO
C2
AD18
P0.22
C2
27
P0.22
GPIO
C3
AD12
P0.17
C3
20
P0.17
GPIO, NC for BT840X,BT840XE, PA control
14

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
C4
AD10
P0.15
C4
18
P0.15
GPIO
C5
W24
P1.02
C5
15
P0.12
GPIO
C6
U24
P1.04
GPIO
D0
GND
D0
45
VSS
Ground
D1
AC19
P0.23
D1
28
P0.23
GPIO
D2
AC15
P0.19
D2
22
P0.19
GPIO, NC for BT840 X,BT840XE, PA control
D3
AC11
P0.16
D3
19
P0.16
GPIO
D4
AC9
P0.14
D4
17
P0.14
GPIO
D5
Y23
P1.01
D5
14
P0.11
GPIO
D6
T23
P1.05
GPIO
E0
P23
P1.07
GPIO
E1
AD16
P0.20
GPIO
E2
AC17
P0.21
GPIO
E3
R1
P1.09
GPIO
E4
AD6
D+
USB D+
E5
AD4
D-
USB D-
E6
U1
P0.12
GPIO
F0
Ground pad
F1
Ground pad
F2
Ground pad
F3
Ground pad
F4
Y2
VDDH
High Voltage Power Supply
F5
AB2
DCCH
DC to DC converter output
F6
AD2
VBUS
5V DC power for USB 3.3V regulator
15

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
Mounting BT840F on the Host PCB
The following figure shows recommended mounting of BT840F module on the host PCB.
• For the best Bluetooth range performance, the antenna area of module shall extend 9.8 mm outside the
edge of host PCB board, or 9.8 mm outside the edge of a ground plane.
• The next choice is to place a module on a corner of host PCB, the antenna area shall extend 9.8 mm from
the edge of ground plane. Ground plane shall be at least 5 mm from the edge of the antenna area of
module.
• We don’t recommend mounting BT840F module in the middle of a host PCB.
For the best Bluetooth range performance, keep all external metal at least 30mm from the antenna area.
16

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
Host Board Design for Low Cost or Long Range
On nRF52 series SoCs, Nordic offers various memory options and protocol supports. Fanstel offers various
antenna and power amplifier options. A host board can be designed to accommodate these nRF52 modules.
Our suggestions for host PCB design:
If your main goal is minimum PCB cost,
• use a 2-sided PCB.
• Use library component from EV BT832 Gerber files, can be downloaded from http://www.fanstel.com/
download-document/. It has 16 castellated pins plus 24 LGA pins. BT840F library component can be
used. However, signal routing can be difficult on a 2-sided PCB.
• Be sure of no metal contact in the area of 21 additional BT840F pins.
• BT840F can be mounted on a BT832 pad.
If you main goal is maximum wireless range,
• use a 4 or more layers PCB.
• Use library component from EV BT840F V4 or newer Gerber files, can be downloaded from http://
www.fanstel.com/download-document/. It has 16 castellated pins plus 45 LGA pins.
• As much ground plane under BT840F, on top side of host PCB as possible. Use EV BT840F V4 Gerber
files as an example.
• If your products may need wireless range of 1350 meters or more, allocate physical space for a
15x28x1.9mm module. This larger module size is required to accommodate Skyworks SKY66112 power
amplifier.
• Don’t use P0.06 (BT840F pin B4), P0.17 (BT840F pin C3), and P0.19 (BT840F pin D2) on the host
board. These pins are used to control SKY66112 power amplifier in BT832X, BT832XE, BT840X and
BT840XE.
17

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
Control Skyworks Power Amplifier
BT840X uses SKYWORKS SKY66112-11 power amplifier. The connection diagram with control signal pins is
below.
A firmware example to control Skyworks SKY66112 power amplifier is below. This firmware file can be
downloaded from http://www.fanstel.com/download-document/.
You can set nRF52840 TX to up to + 8 dBm. The conditions for passing FCC and Industrial Canada
certification testings:
• BT840X: Set nRF52840 TX to +2 dBm.
• BT840XE: Set nRF52840 TX to +2 dB and use Fanstel antenna ANT000.
Header files
#ifndef PA_LNA_H__
#define PA_LNA_H__
#include "ble.h"
#include "app_error.h"
#include "nrf_drv_gpiote.h"
#include "nrf_drv_ppi.h"
void pa_lna_init(uint32_t gpio_pa_pin, uint32_t gpio_lna_pin);
#endif
18

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
Main program.
#include "pa_lna.h"
#define APP_PA_LAN
#ifdef APP_PA_LAN
#define APP_PA_PIN 17
#define APP_LNA_PIN 19
#define APP_CHL_PIN!8
#define APP_CPS_PIN!6
int main(void)
{
....
#ifdef APP_PA_LAN!
!nrf_gpio_cfg_output(APP_CPS_PIN);
!nrf_gpio_cfg_output(APP_CHL_PIN);
!nrf_gpio_pin_set(APP_CHL_PIN);
!nrf_gpio_pin_clear(APP_CPS_PIN); //enable
!pa_lna_init(APP_PA_PIN,APP_LNA_PIN);
#endif!
....
}
SKY66112 control codes.
#include <stdint.h>
#include <string.h>
#include "pa_lna.h"
#include "ble.h"
#include "app_error.h"
#include "nrf_drv_gpiote.h"
#include "nrf_drv_ppi.h"
void pa_lna_init(uint32_t gpio_pa_pin, uint32_t gpio_lna_pin)
{
ble_opt_t opt;
uint32_t gpiote_ch = NULL;
19

BLE 5, Thread, Zigbee Modules, BT840/F/E/X/XE Ver 1.16 Dec.. 2019
ret_code_t err_code;
memset(&opt, 0, sizeof(ble_opt_t));
err_code = nrf_drv_gpiote_init();
if(err_code != NRF_ERROR_INVALID_STATE)
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_ppi_init();
//if(err_code != MODULE_ALREADY_INITIALIZED)
APP_ERROR_CHECK(err_code);
nrf_ppi_channel_t ppi_set_ch;
nrf_ppi_channel_t ppi_clr_ch;
err_code = nrf_drv_ppi_channel_alloc(&ppi_set_ch);
APP_ERROR_CHECK(err_code);
err_code = nrf_drv_ppi_channel_alloc(&ppi_clr_ch);
APP_ERROR_CHECK(err_code);
nrf_drv_gpiote_out_config_t config = GPIOTE_CONFIG_OUT_TASK_TOGGLE(false);
if((gpio_pa_pin == NULL) && (gpio_lna_pin == NULL))
{
err_code = NRF_ERROR_INVALID_PARAM;
APP_ERROR_CHECK(err_code);
}
if(gpio_pa_pin != NULL)
{
if(gpiote_ch == NULL)
{
err_code = nrf_drv_gpiote_out_init(gpio_pa_pin, &config);
APP_ERROR_CHECK(err_code);
gpiote_ch = nrf_drv_gpiote_out_task_addr_get(gpio_pa_pin);
}
// PA config
opt.common_opt.pa_lna.pa_cfg.active_high = 1; // Set the pin to be active high
opt.common_opt.pa_lna.pa_cfg.enable = 1; // Enable toggling
opt.common_opt.pa_lna.pa_cfg.gpio_pin = gpio_pa_pin; // The GPIO pin to toggle tx
}
if(gpio_lna_pin != NULL)
{
if(gpiote_ch == NULL)
{
err_code = nrf_drv_gpiote_out_init(gpio_lna_pin, &config);
APP_ERROR_CHECK(err_code);
20