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# 1.8 CRC-32 Generation

This example application demonstrates how to use the CRC peripheral to compute 32-bit Cyclic Redundancy Checksum (CRC).

## Description

The CRC unit provides support for calculating a CRC-8, CRC-16 and CRC-32 value on a user buffer or Flash memory without CPU intervention.

This example application computes the 32-bit CRC value for the polynomial (0x04C11DB7) using the CRC peripheral.

Once the hardware CRC is generated, it is validated using a software-calculated CRC value.

## Downloading and building the application

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repository or download as zip file.

Path of the application within the repository is apps/crc/crc32_generate.

To build the application, refer to the following table and open the project using its IDE.

Project Name | Description
--- | ---
pic32ak_gc_curiosity.X | MPLABX project for Curiosity Platform Development Board and PIC32AK1216GC41064 General Purpose Dual In-Line Module (DIM)

## Setting up the hardware

The following table shows the target hardware for the application projects.

Project Name | Description
--- | ---
pic32ak_gc_curiosity.X | Curiosity Platform Development Board and PIC32AK1216GC41064 General Purpose Dual In-Line Module (DIM)

### Setting up Curiosity Development Board

- Insert the GP DIM on to DIM slot of Curiosity Board
- Connect the PKoB (J24) on the board to the computer using a USB type-C cable

## Running the Application

1. Open the Terminal application (Ex.:Tera term) on the computer
2. Connect to the “PICkit 4 On Board Virtual COM Port” and configure the serial settings as follows:
   - Baud : 115200
   - Data : 8 Bits
   - Parity : None
   - Stop : 1 Bit
   - Flow Control : None
3. Build and Program the application project using its IDE
4. Following message is output on console:
   - Expected CRC Value for the polynomial (0x04C11DB7) is (0xcbf43926)
5. The LED indicates the success or failure:
   - LED is turned ON when the hardware CRC value matches with the software calculated CRC value

Following table provides LED name:

Board | LED Name
--- | ---
Curiosity Platform Development Board and PIC32AK1216GC41064 General Purpose Dual In-Line Module (DIM) | LED0