Implementations

pw_i2c: Cross-platform I2C API with interactive debugging

To use the pw_i2c API, you need to specify in your build system an implementation of the pw_i2c virtual interface.

Existing implementations

The following Pigweed modules are ready-made pw_i2c implementations that you can use in your projects:

• pw_i2c_linux for Linux userspace.

• pw_i2c_mcuxpresso for the NXP MCUXpresso SDK.

• pw_i2c_rp2040 for the Raspberry Pi Pico SDK.

See Quickstart for build system configuration examples.

Create your own implementation

If the available implementations don’t meet your needs, you can create your own:

Note

pw_i2c_rp2040 uses the deprecated pw::i2c::Initiator API.

See pw_i2c_mcuxpresso and pw_i2c_mcuxpresso for example implementations of DoTransferFor(span<Message>, ...).

1. Implement the pw::i2c::Initiator interface. See pw_i2c_rp2040 for an example Raspberry Pi Pico SDK implementation and common_pico.cc for example usage of pw_i2c_rp2040.

2. In your build system, take a dependency on the pw_i2c API headers. See Quickstart for build system configuration examples.