S32 SDK
ADC Hardware Trigger

How to trigger the ADC by hardware

Application description


The purpose of this demo application is to show you the usage of the ADC module triggered in hardware by the Programmable Delay Block from the S32K144 CPU using the S32 SDK API.

  • The application uses PDB to trigger ADC conversions every 1s.
  • When the conversion is complete the data is sent to the host PC using LPUART.
See also
PDB_Example_group
For alternate ADC Hardware triggering scheme see ADC_LOW_POWER_group

Prerequisites


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

  • 1 S32K144 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).

Boards supported


The following boards are supported by this application:

  • S32K144EVB-Q100
  • S32K144-MB

Hardware Wiring


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

PIN FUNCTION S32K144EVB-Q100 S32K144-MB
LPUART1 TX (PTC7) UART_TX - wired on the board J11.26 - J20.2
LPUART1 RX (PTC6) UART_RX - wired on the board J11.25 - J20.5
ADC0 Input 12 (PTC14) POT - wired on the board J21.1 - J11.18

How to run


1. Importing the project into the workspace

After opening S32 Design Studio, go to File -> New S32DS Project From... and select adc_hwtrigger. 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(adc_hwtrigger). 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
adc_hwtrigger Debug_RAM Jlink Debug the RAM configuration using Segger Jlink debuggers
adc_hwtrigger Debug_FLASH Jlink Debug the FLASH configuration using Segger Jlink debuggers
adc_hwtrigger Debug_RAM PEMicro Debug the RAM configuration using PEMicro debuggers
adc_hwtrigger 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


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