Power Mode Switch

Example application demonstrating S32K118 power modes

Application description


The purpose of the application is to show the user how to enter various power modes of the S32K118 SoC using the S32 SDK API.

The application displays on the host PC terminal a menu in which the user can select to enter:

  • Normal Run (RUN)
  • Very Low Power Run (VLPR)
  • STOP mode 1 (STOP1)
  • STOP mode 2 (STOP2)
  • Very Low Power Stop (VLPS)

When user selects a mode, PC terminal will show result successfully or unsuccessfully. If user selected STOP1, STOP2 or VLPS mode, the GREEN_LED turn off and RED_LED turn on The CPU can be woken up from sleep modes by pressing button (PTD5) and then GREEN_LED turn on,RED_LED turn off.

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)
  • 1 Personal Computer
  • 1 Jlink Lite Debugger (optional, users can use Open SDA)
  • UART to USB converter if it is not included on the target board. (Please consult your boards documentation to check if UART-USB converter is present).
  • 2 Dupont female to female cable.

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
LPUART1 TX (PTB0) UART_RX - wired on the board
LPUART1 RX (PTB1) UART_TX - wired on the board
BUTTON (PTD5) SW3 - wired on the board
GREEN_LED () green led - wired on the board
RED_LED () red led - 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 power_mode_switch_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(power_mode_switch_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 bulid action to be completed before continuing to the next step.

4. Building the project

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

Configuration Name Description
power_mode_switch_s32k118 Debug_FLASH Jlink Debug the FLASH configuration using Segger Jlink debuggers
power_mode_switch_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.

Notes


Due to limited RAM size, this example contains only one build configuration for target flash memory (and the associated debug configuration). For this example it is necessary to open a terminal emulator and configure it with:

  • 115200 baud
  • One stop bit
  • No parity
  • No flow control
  • '\n' line ending