TWIM with TWIS non-blocking

The sample demonstrates a functionality of nrfx_twim and nrfx_twis drivers operating in the non-blocking mode.

Requirements

The sample supports the following development kits:

Board	Support
nrf52dk_nrf52832	Yes
nrf52833dk_nrf52833	Yes
nrf52840dk_nrf52840	Yes
nrf5340dk_nrf5340	Yes
nrf54l15dk_nrf54l15	Yes
nrf9160dk_nrf9160	Yes

Overview

Application initializes nrfx_twim and nrfx_twis drivers. It then sends a specified message ( MSG_TO_SEND ) from master to slave and back using TWIM and TWIS peripherals. During this task different buffers are used, and data is transferred as follows:

m_tx_buffer_master -> m_rx_buffer_slave -> m_rx_buffer_master

The twim_handler() and twis_handler() are executed with relevant log messages.

‍For more information, see TWIM driver and TWIS driver - nrfx documentation.

Wiring

To run the sample correctly, connect pins as follows:

LOOPBACK_PIN_1A with LOOPBACK_PIN_1B.
LOOPBACK_PIN_2A with LOOPBACK_PIN_2B

‍Refer to pin definitions in common/nrfx_example.h.

You should monitor the output from the board to check if it is as expected.

Building and running

To run this sample, build it for the appropriate board and then flash it as per instructions in Building and running section.

Sample output

You should see the following output:

- "Starting nrfx_twim_twis non-blocking example."
- "Message to send: Nordic Semiconductor"
- "Content of master RX buffer:"
- "--> Slave event: write request"
- "--> Slave event: write done."
- "--> Master event: done - transfer completed"
- "--> Slave event: read request"
- "--> Slave event: read done."
- "Content of master RX buffer: Nordic Semiconductor"