Cyclic Redundancy Check Drivers (CRC)

Overview

This sample demonstrates how to use the CRC driver API. It computes a single CRC variant selected via sample Kconfig and logs the computed result. Optionally, it verifies against an expected value.

Configuration

Select the CRC variant to run using the sample’s Kconfig:

SAMPLE_CRC_VARIANT_CRC8
SAMPLE_CRC_VARIANT_CRC16_CCITT
SAMPLE_CRC_VARIANT_CRC32_IEEE
SAMPLE_CRC_VARIANT_CRC32_C

The sample performs a build-time capability check and will emit a compile error if the selected variant is not supported by the target driver/platform.

Building and Running

Building and Running for Renesas RA8M1

The sample can be built and executed for the RA8M1 Evaluation Kit as follows:

west build -b ek_ra8m1 samples/drivers/crc
west flash

To build for another board, change “ek_ra8m1” above to that board’s name.

Sample Output

The console logs the selected variant and the computed value. If an expected value is provided, the sample verifies and logs the outcome.

crc_example: CRC8 result: 0x000000b2
crc_example: CRC8 verification succeeded (expected 0x000000b2)

Note

If the selected CRC variant is not supported by the target, the build will fail with an error message describing the mismatch.

Expected Behavior

When the sample runs, it should:

Compute the selected CRC variant for predefined data.
Log the computed CRC value.
If an expected value is configured, verify it and log success/failure.