Here is a Project created using new KDS version 3.0 and Kinetis software development kit 1.2 on processor expert platform. This is a project for Toggle a Green LED using PIT module of PE implemented using freedom board FRDM-K22F.
To run successfully this exercise, you need first to download following packages (link enclosed):
- IDE toolchain Kinetis Design Studio (KDS) min v3.0
- microcontroller Library Kinetis Software Development Kit (KSDK) min 1.2
- FRDM-K22F materials (schematics, Quick Start Package and Sample Code Package)
- latest P&E Micro windows drivers and SDA Applications
Before connecting your FRDM-K22F for the first time to the USB port of your computer, install the P&E Micro windows driver to ensure a correct detection of the board.
Install first the IDE toolchain KDS and when the installation ended successfully, install the MCU Library KSDK keeping the proposed installation path c:\freescale\kds or ksdk unchanged.
Launch KDS and define your workspace path, then select Help, Install New Software, Add, Archive, C:\Freescale\KSDK_1.2.0\tools\eclipse_update, select KSDK_1.2.0_Eclipse_Update.zip and press Open, OK, select KSDK Eclipse Update, press Next, Accept the Licence Agreement and press Finish. The KSDK libraries are now directly available in the IDE toolchain.
The automated code generator Processor Expert is already included in the IDE Toolchain (available separately as Processor Expert Driver Suite for other IDE toolchains).
The tutorial shows how to toggle LED with KSDK 1.2.0 in KDS 3.0 and Processor Expert using a Flex timer module Output for FRDM-K22F.
Guide is prepared for Green LED which is connected to PTA2/FTM Module 0 (FTM0), channel 7 (according to FRDM-K22F schematics).
Create new project
Create new project in KDS 3.0 with KSDK 1.2.0
Type the project name” K22F-PIT-LED toggle”, choose the board FRDM-K22F, mark off options Kinetis SDK and Processor Expert
Now, your project structure looks like this in the project explorer and Processor Expert windows:
Set Processor Expert Settings
Now, go to Components Library, find fsl_pit component using filters KSDK 1.2.0 and Applicable to Project and by double click add the component to the Processor Expert Component View of your project.
Similarly search for gpio and double click on fsl_gpio component which is required for toggling LED as shown below:
Before we proceed for changing the settings in component inspector go to CPU component and make the below changes
First turn the Component Inspector view to Classical view by unselecting the Tab View option.
This is required as the pin PTA-2 is in conflict with TDO signal of Debug interface (JTAG).
To overcome this error we will disable the JTAG configuration from CPU settings as shown below:
Double click on fsl_pit module from components windows and Component Inspector view should open automatically
Configure the PIT module and click on “Period” option under configuration section as shown below:
Now all the red markings will vanish which indicates it is error free
Now double click on the fsl_gpio module it looks like below:
Make the settings as shown below:
i.e disable the input pins,
output pin 0 is configured to LEDRGB_GREEN port pin PTA-2 which is connected to blue LED
Now all our modules are ready assigned, we need to generate code by pressing the generate icon as shown below:
You can see all the required files will get generated under Generated_Code folder inside project folder.
Now it’s time to include our task inside the PIT IRQ. The ISR can be found in Events.c file as shown below:
Now we are inserting the toggling function inside PIT0_IRQHandler()
The toggling function can be found from components window inside fsl_gpio module as shown below:
The function GPIO_DRV_TogglePinOutput(uint32_t pinName); accepts the parameter uint32_t pinName this can be found from the assigned name for blue led gpio we assigned in component inspector of fsl_gpio as shown below:
Build your project by choosing the right toolbar shortcut
Debugging the FRDM-K22F board for the first time, you need to define a Debug Configuration by selecting the appropriate option from the toolbar
For this example, we are going to select the PEMicro OpenSDA Debug mode.
Select the Debugger tab to choose the Interface OpenSDA Embedded Debug - USB Port
You can now start the Debug session!!
Launch the configuration
You should now able to see the Green LED blink with a 1Hz frequency i.e for every 1 sec of interrupt the LED toggles.
I have enclosed the project folder and binaries for quick reference and evaluation.