I2C PAL

Driver example using I2C

Application description


The purpose of this application is to show you how to use the LPI2C and FLEXIO Interfaces on the S32K118 using the S32 SDK API.

The application uses one board instance of LPI2C in slave configuration and one board instance of FLEXIO in master configuration to communicate data via the I2C bus using interrupts. If transfer succeeded, which means that slave rx buffer have the same elements as master tx buffer, the RGB_GREEN led wired on the board will be on, otherwise if the transfer failed the RGB_RED led will be on.

Prerequisites


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

  • 1 S32K118 board
  • 1 Power Adapter 12V (if the board can't be powered from the USB)
  • 1 Personal Computer
  • 4 Dupont male to male cable
  • 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
FLEXIO SDA (PTD0) J1.9 - J1.1
FLEXIO SCL (PTD1) J1.11 - J1.3
LPI2C SDA (PTA2) J1.1 - J1.9
LPI2C SCL (PTA3) J1.3 - J1.11

How to run

1. Importing the project into the workspace

After opening S32 Design Studio, go to File -> New S32DS Project From... and select i2c_pal. 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(i2c_pal). 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) 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
i2c_pal_s32k118_debug_flash_jlink Debug the FLASH configuration using Segger Jlink debuggers
i2c_pal_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.

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