This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

EBYTE E73-TBB

Overview

The EBYTE E73-TBB hardware provides support for the Nordic Semiconductor nRF52832 ARM Cortex-M4F CPU and the following devices:

  • ADC

  • CLOCK

  • FLASH

  • GPIO

  • I2C

  • MPU

  • NVIC

  • PWM

  • RADIO (Bluetooth Low Energy)

  • RTC

  • Segger RTT (RTT Console)

  • SPI

  • UART

  • WDT

EBYTE E73-TBB

Fig. 98 EBYTE E73-TBB (Credit: EBYTE)

More information about the board can be found at the E73-TBB website 1. The Nordic Semiconductor Infocenter 2 contains the processor’s information and the datasheet.

Hardware

E73-TBB has two external oscillators. The frequency of the slow clock is 32.768 kHz. The frequency of the main clock is 32 MHz. Additionally the board features CH340 USB-UART converter. It is possible to connect external BT antenna using U.FL socket and solder NFC antenna using NFC_ANT connector.

Supported Features

The ebyte_e73_tbb_nrf52832 board configuration supports the following hardware features:

Interface

Controller

Driver/Component

ADC

on-chip

adc

CLOCK

on-chip

clock_control

FLASH

on-chip

flash

GPIO

on-chip

gpio

I2C(M)

on-chip

i2c

MPU

on-chip

arch/arm

NVIC

on-chip

arch/arm

PWM

on-chip

pwm

RADIO

on-chip

Bluetooth

RTC

on-chip

system clock

RTT

Segger

console

SPI(M/S)

on-chip

spi

UART

on-chip

serial

WDT

on-chip

watchdog

Other hardware features are not supported by the Zephyr kernel. See E73-TBB website 1 and Nordic Semiconductor Infocenter 2 for a complete list of nRF52832 hardware features.

Connections and IOs

LED

  • LED0 (red) = P0.17

  • LED1 (red) = P0.18

Push buttons

  • BUTTON0 = SW1 = P0.14

  • BUTTON1 = SW2 = P0.13

External Connectors

P1 Header

PIN #

Signal Name

1

GND

2

3.3V

3

P0.04

4

P0.03

5

P0.02

6

P0.31

7

P0.30

8

P0.29

9

P0.28

10

P0.27

11

P0.26

12

P0.25

P2 Header

PIN #

Signal Name

1

P0.24

2

P0.23

3

P0.22

4

SWDIO

5

SWDCLK

6

P0.21/RST

7

P0.20

8

P0.19

9

P0.16

10

P0.15

11

P0.12

12

P0.11

NFC_ANT

PIN #

Signal Name

1

P0.10

2

P0.09

Programming and Debugging

Flashing

Follow the instructions in the Nordic nRF5x Segger J-Link page to install and configure all the necessary software. To flash the board connect pins: SWDIO, SWDCLK, RST, GND from E73-TBB to corresponding pins on your J-Link device, then build and flash the application in the usual way.

# From the root of the zephyr repository
west build -b ebyte_e73_tbb_nrf52832 samples/blinky
west flash

Debugging

Refer to the Nordic nRF5x Segger J-Link page to learn about debugging Nordic chips with a Segger IC.

Testing the LEDs and buttons in the E73-TBB

There are 2 samples that allow you to test that the buttons (switches) and LEDs on the board are working properly with Zephyr:

:ref:`blinky-sample`
:ref:`button-sample`

You can build and flash the examples to make sure Zephyr is running correctly on your board. The button and LED definitions can be found in boards/arm/ebyte_e73_tbb_nrf52832/ebyte_e73_tbb_nrf52832.dts.

References

1(1,2)

https://www.ebyte.com/en/product-view-news.html?id=889

2(1,2)

https://infocenter.nordicsemi.com