CRC Checksum

Example application showing the usage of the CRC module

Application description


The purpose of this demo application is to show you how to use the Cyclic Redundancy Check of the S32K118 with this SDK.

In this example, The CRC is configured to generate a configurations for CCITT standard following:

The application:

  1. After reset starts with both GREEN and RED LED turned off.
  2. Initializes CRC module with the above CCITT 16 bits standard configuration.
  3. Pressing the SW button CRC calculation is initialized with CRC_data array from input_data.c file.
  4. If the result is correct GREEN LED is turned on. Otherwise RED LED will be turned on.
  5. The program stops.

Prerequisites


To run the example you will need to have the following items:

  • 1 S32K118 board
  • 1 Power Adapter 12V (if the board cannot be powered from the USB port)
  • 2 Dupont female to female cables
  • 1 Personal Computer
  • 1 Jlink Lite Debugger (optional, users can use Open SDA)

Boards supported


The following boards are supported by this application:

  • S32K118EVB-Q064

Hardware Wiring


The following connections must be done to for this example application to work:

PIN FUNCTION S32K118EVB-Q064
RED_LED (PTD16) RGB_RED - wired on the board
GREEN_LED (PTD15) RGB_GREEN - wired on the board
SW (PTD3) SW2 - wired on the board

How to run


1. Importing the project into the workspace

After opening S32 Design Studio, go to File -> New S32DS Project From... and select crc_checksum_s32k118. Then click on Finish.
The project should now be copied into you current workspace.

2. Generating the Processor Expert configuration

First go to Project Explorer View in S32 DS and select the current project(crc_checksum_s32k118). Then go to Project and click on Generate Processor Expert Code
Wait for the code generation to be completed before continuing to the next step.

3. Building the project

Select the configuration to be built FLASH (Debug_FLASH) or RAM (Debug_RAM) by left clicking on the downward arrow corresponding to the build button(. Wait for the build action to be completed before continuing to the next step.

4. Running the project

Go to Run and select Debug Configurations. There will be four debug configurations for this project:

Configuration Name Description
crc_checksum_s32k118_debug_ram_jlink Debug the RAM configuration using Segger Jlink debuggers
crc_checksum_s32k118_debug_flash_jlink Debug the FLASH configuration using Segger Jlink debuggers
crc_checksum_s32k118_debug_ram_pemicro Debug the RAM configuration using PEMicro debuggers
crc_checksum_s32k118_debug_flash_pemicro Debug the FLASH configuration using PEMicro debuggers


Select the desired debug configuration and click on Launch. Now the perspective will change to the Debug Perspective.
Use the controls to control the program flow.

Notes


The CRC module in S32K platform supports both big endian and little endian in source data.

Note
For more detailed information related to S32 Design Studio usage please consult the available documentation.