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EVK BMD-345 - User guide

UBX-19051533 - R01

Contents

Page 25 of 27

Figure 24: nRF Blinky interaction with BMD-345-Eval

nRF Connect can also be used to observe the RSSI and operate the example with manual interaction
with the Bluetooth characteristics.

Figure 25: nRF Connect interaction with BMD-345-Eval

Summary of Contents for EVK BMD-345

Page 1: ...stract This document describes how to set up the EVK BMD 345 evaluation kit to evaluate the BMD 345 modules It also describes the different options for debugging and the development capabilities inclu...

Page 2: ...oducts names logos and designs included in this document Copying reproduction modification or disclosure to third parties of this document or any part thereof is only permitted with the express writte...

Page 3: ...2 4 LEDs 9 2 5 Virtual COM port 10 2 6 32 kHz crystal oscillator 10 2 7 NFC connector 11 2 8 Current sensing headers 11 2 9 External SEGGER J Link debug interface 11 2 10QSPI 13 2 11GPIO jumpers 13 2...

Page 4: ...ell as a USB peripheral connector user LEDs and a reset button 44 GPIO are available on headers that are compatible with the Arduino form factor This allows easy use of existing Arduino shields Curren...

Page 5: ...SDK is your first stop for building fully featured reliable and secure applications with the nRF52 and nRF51 series It offers developers a wealth of varied modules and examples right across the spect...

Page 6: ...rovided to allow by passing any of the protection diodes eliminating the voltage drop across them Care should be taken to not damage the supplies when the protection is by passed 2 1 1 Powering the bo...

Page 7: ...by default Pressing reset while the interface IC is powered will cause a momentary reset signal on the RESET_N output of the interface IC which is connected via solder jumper to P0 18 of the BMD 345 m...

Page 8: ...EVK BMD 345 User guide UBX 19051533 R01 Hardware description Page 8 of 27 Figure 4 Schematic Reset...

Page 9: ...ser buttons The buttons and ESD protection can be completely removed from the circuit by breaking the associated jumper Figure 5 Schematic User buttons 2 4 LEDs User LEDs are provided on the evaluatio...

Page 10: ...2 Virtual COM port connections Figure 7 Interface IC UART circuit 2 6 32 kHz crystal oscillator The evaluation board has a 32 768 kHz crystal oscillator connected to the BMD 345 module by default Thi...

Page 11: ...e shield and the third pin to ground To measure current consumption use a multimeter or other precision voltage measurement device to measure voltage drop across pins one and two Current can also be m...

Page 12: ...ating voltages outside 3 0 V to 3 3 V require the use of an external SEGGER J Link Debug Probe 2 EXT_SWDIO I O 3 GND Power Connect to SWDIO on the target hardware 4 EXT_SWDCLK O 5 GND Power Connect to...

Page 13: ...re available to allow GPIO configuration Most solder jumpers are used to remove on board components from the module s GPIO nets to eliminate interference with external circuitry added on the I O heade...

Page 14: ...pins of the BMD 345 EVK are not 5 V tolerant Arduino Uno style shields shall be configured to use 3 3 V DC VSHLD as the I O voltage reference The tables below are presented in order of the headers on...

Page 15: ...P1 07 P1 07 GPIO 3 No connection 4 No connection 5 No connection 6 P1 03 P1 03 GPIO 7 No connection 8 P1 01 P1 01 GPIO Table 6 Header J7 Pin Pin name nRF52840 Function 1 P0 03 P0 03 GPIO AIN1 2 P0 04...

Page 16: ...GPIO 9 P0 19 P0 19 OPEN GPIO QSPI CLK 10 P0 20 P0 20 OPEN GPIO QSPI DIO0 11 P0 21 P0 21 OPEN GPIO QSPI DIO1 12 P0 22 P0 22 OPEN GPIO QSPI DIO2 13 P0 23 P0 23 OPEN GPIO QSPI DIO3 14 P0 24 P0 24 GPIO 1...

Page 17: ...referred Nordic SoftDevice Compatible Nordic DK BMD 345 EVAL nRF52840 S140 PCA10056 nRF52840 DK Table 11 u blox evaluation with Nordic DK cross reference 4 Install nRF Connect for desktop and optional...

Page 18: ...nd then turn solid once the USB device is enumerated Some flickering is normal 3 After a few seconds the computer will recognize the evaluation board as a J Link device and install the USB Virtual COM...

Page 19: ...titled mac_addr bin will be saved in the current directory The contents will contain the MAC address in little endian format 33 22 11 93 54 94 FF FF to correspond to the address 94 54 93 11 22 33 The...

Page 20: ...ire folder structure to a new folder in the same example folder for example C u blox nRF5_SDK_16 0 0_98a08e2 examples ble_peripheral ble_app_blinky_sd Add a file called custom_board h This is used to...

Page 21: ...tions The following window will appear Figure 18 Project options Click on Preprocessor then select Common from the drop down Figure 19 Preprocessor common options Double click on the Preprocessor Defi...

Page 22: ...rd h A small block of code needs to be added to the application to enable this feature In main c add the following function above the advertising_start function static void pa_lna_assist uint32_t gpio...

Page 23: ...f_gpio_pin_clear PA_MODE_PIN Set PA LNA Select Pin low for U FL nrf_gpio_cfg_output PA_A_SEL_PIN nrf_gpio_pin_clear PA_A_SEL_PIN Setup PA LNA TX and RX control pins with the SoftDevice pa_lna_assist P...

Page 24: ...rol signals on logic analyzer Open the nRF Blinky mobile application Connect to the Nordic_Blinky device Figure 23 nRF Blinky scanning for devices LED1 will go off and LED2 will illuminate Operate the...

Page 25: ...Page 25 of 27 Figure 24 nRF Blinky interaction with BMD 345 Eval nRF Connect can also be used to observe the RSSI and operate the example with manual interaction with the Bluetooth characteristics Fig...

Page 26: ...data sheet 3 Nordic nRF52840 product specification 4 S140 SoftDevice specification 5 u blox package information guide doc no UBX 14001652 For regular updates to u blox documentation and to receive pr...

Page 27: ...Office China Beijing Phone 86 10 68 133 545 E mail info_cn u blox com Support support_cn u blox com Regional Office China Chongqing Phone 86 23 6815 1588 E mail info_cn u blox com Support support_cn u...

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