Getting Started with the LPC845-BRK Breakout Board

1. Build and Flash Cortex-M33 Application

The following steps will guide you through the hello_world demo application using MCUXpresso IDE for the Cortex-M33 application. The MCUXpresso IDE installation can be found at the section “2. Get Software” of this Getting Started guide.

1. Open the MCUXpresso IDE
2. Switch to the Installed SDKs view within the MCUXpresso IDE window

3. Drag and drop the LPC55S36 SDK (zipped) file into the Installed SDKs view
4. You will get the following pop-up. Click on OK to continue the import:

5. The installed SDK will appear in the Installed SDKs view as shown below:

6. Then click on Import SDK example(s)...

7. Click on the LPCXpresso55S36 board to select that you want to import an example that can run on that board, and then click on Next

8. Use the arrow button to expand the demo_apps category, and then click the checkbox next to hello_world to select that project. To use the UART for printing (instead of the default semihosting), select UART as the SDK Debug Console checkbox under the project options. Then, click on Finish

9. Select the project and build it

10. The project will build without problems

11. Connect the board to your computer with the micro USB to J40 ‘LINK USB’ port

12. Download the application to your LCP55S36

13. Select the J-Link debug probe

14. Run the application

1. Build an Example Application

The following steps will guide you through opening the hello_world application. The instructions for compiling and debugging the Cortex M33 core are covered in the instructions below.

Please use IAR Embedded Workbench for Arm version 8.50.9 or above.

1. First, unzip the previously downloaded LPC55S36 SDK package
2. Open the desired example application workspace. Most example application workspace files can be located using the following path:

<install_dir>/boards/<sdk_board_name>/<example_type>/<application_name>/iar

3. Select the desired build target from the drop-down. For this example, select the “hello_world – Debug” target

4. Open the project properties by doing a right-click on the project and selecting Options

5. Now go to the Debugger section and change the debugger driver to Jlink. Press the OK button

6. To build the application, click the “Make” button, highlighted in red below

7. The build will complete without errors


Note: In case of building errors, make sure that the correct Board is selected, right click in the project → Options → General Options → Target → Device, Select the NXP LPC55S36, this board is supported in IAR Embedded Workbench for Arm version 8.50.9 or Higher.


2. Run an Example Application

The MCU-LINK circuit on the board should have been updated to use the J-Link interface during Step 1.2 “Install Drivers” of the Getting Started website. See that section of the Getting Started website for more details on using LPCScrypt to update the debug firmware on the board to use the J-Link interface if this has not already been done

1. Connect the development platform to your PC via USB cable to J1 “Link USB”

2. Click the "Download and Debug" button to download the application to the target

3. The application is then downloaded to the target and automatically runs to the main() function
4. Run the code by clicking the "Go" button to start the application

5. The hello_world application is now running on the Cortex-M33

1. Install CMSIS device pack

After the MDK tools are installed, Cortex^® Microcontroller Software Interface Standard (CMSIS) device packs must be installed to fully support the device from a debug perspective. These packs include things such as memory map information, register definitions and flash programming algorithms. Follow these steps to install the appropriate CMSIS pack.

Please use MDK-Arm Microcontroller Development Kit (Keil)^® version 5.33 or above.

1. Open the MDK IDE, which is called µVision. Inside the IDE, select the "Pack Installer" icon

2. In the Pack Installer window, search for ““LPC55S36” to bring up the LPC55xx family. Click on the LPC55S36 name, and then in the right-hand side you’ll see the NXP:LPC55S36_DFP pack. Click on the “Install” button next to the pack. This process requires an internet connection to successfully complete
3. After the installation finishes, close the Pack Installer window and return to the µVision IDE
2. Build the Example Application

The following steps will guide you through opening the hello_world application. These steps may change slightly for other example applications as some of these applications may have additional layers of folders in their path.

1. If not already done, open the desired demo application workspace in:

<install_dir>/boards/<sdk_board_name>/<example_type>/<application_name>/mdk

The workspace file is named <application_name>.uvmpw, so for this specific example, the actual path is:

<SDK_2_10_1_LPCXpresso55S36.zip/boards/lpcxpresso55s36/demo_app/cm33/mdk /hello_word.uvmpw

2. Select debug configuration

3. Do right click on the project and select the project options:

4. Now, go to the Debug option and select J-LINK. Click on Ok button

5. To build the demo project, select the "Rebuild" button, highlighted in red

6. The build will complete without errors
3. Run an Example Application

The LPC55S36 board comes loaded with the CMSIS-DAP debug interface from the factory. If you have changed the debug LPC-LINK2 application on your board, check the LPCScrypt tutorial described in the past section.

1. Connect the development platform to your PC via USB cable to J1 “Debug Link”. Ensure the DFULink jumper (JP6) is removed when powering the board to boot the debug probe from internal flash

   
2. Open the terminal application on the PC (such as PuTTY or Tera Term) and connect to the debug COM port you determined earlier. Configure the terminal with these settings:
• 115200 baud rate
• No parity
• 8 data bits
• 1 stop bit

3. After the application is properly built, click the "Download" button to download the application to the target

   

4. Click on “Start/Stop Debug Session” to open the debug view

   

5. Run the code by clicking the "Run" button to start the application

   
6. hello_world application is now running!

1. Build an Example Application

The following steps will guide you through the manipulation of the general-purpose outputs. The example sets up a led_blinky, which blinks the RED LED periodically.

1. Find the Quickstart Panel in the lower left-hand corner

2. Then click on Import SDK examples(s)…

3. Click on the LPCXpresso55s36 board to select that you want to import an example that can run on that board, and then click on Next

4. Use the arrow button to expand the driver_examples category, then expand the sctimer examples, click on the checkbox next to sctimer_pwm_with_dutycycle_change to select it. To use the UART for printing (instead of the default semihosting), Select UART as the SDK Debug Console checkbox under the project options. Then, click on Finish

5. Click on the “lpcxpresso55s36_led_blinky” project in the Project Explorer View and build, compile, and run the demo as described previously

6. You should see the RED LED blinking

   Note: On “Use Pin Tool” tutorial you will learn how to change the LED output pin of the board.

7. Terminate the debug session

1. Open the MCUXpresso Config Tool
2. In the wizard that comes up, select the “Create a new configuration based on an SDK example or hello word project” radio button and click on Next

3. On the next screen, select the location of the MCUXpresso SDK that you had unzipped earlier. Then select the IDE that is being used. Note that only IDEs that were selected in the online SDK builder when the SDK was built will be available and click on clone select example

Then select the project to clone. For this example, we want to use the gpio led output project. You can filter for this by typing “led_blinky” in the filter box and then selecting the “led_blinky” example project. You can then also specify where to clone the project and the name. Then click on Finish


4. After cloning go to the directory you selected and open the project for your IDE. Import, compile and run the project as done in previous sections
5. You should see the RED LED blinking

   Note: On “Use Pin Tool” tutorial you will learn how to change the LED output pin of the board.

6. Terminate the debug session

MCUXpresso IDE Terminal Tutorial

The most recent versions of MCUXpresso IDE count with a terminal emulation application. This tool can be used to display information sent from your NXP development platform's virtual serial port.

1. Open the MCUXpresso IDE

2. Launch the MCUXpresso IDE terminal by clicking on the “Open a Terminal” button on the top of the IDE or press “Ctrl + Alt + Shift + T.”

3. Select Serial Terminal

4. Configure the serial port settings (using the LPCXpresso COM port number) to 115200 baud rate, 8 data bits, no parity and 1 stop bit, then press “OK” button.

5. Verify that the connection is open. If connected, MCUXpresso IDE will look like the figure below at the Terminal view.

6. You're ready to go

Apply Board Support Configuration to an Existing Example Project

Note: Previously, you had to clone a SDK project like in the past step.

1. Convert IDE project to correct Package (Note, the IDE doesn’t really care, this just helps avoid other conflicts).

1. Expand lpcxpresso845max_hello_world >> Project Setting >> MCU, note chip a package values.

2. Right-click “lpcxpresso845max_hello_world” project and select Utilities >> Open directory browser here.

3. Drag-and-Drop. cproject file into the IDE text editor (to use the build-in XML editor)

4. Locate the package variable (should be in the “storageModule” from the bottom but if is not there search in all the others storageModule).

5. Edit package to: LPC845M301JBD48 and save the .cproject file

6. Right-click “lpcxpesso845max_hello_world” project and select refresh (F5).

2. Convert the SDK drivers to use the correct header declarations.

1. Expand lpcxpresso835max_hello_world >> Project Settings >> Options. Right-click in Options and select “Edit Options.

2. Select MCU C Compiler >> Preprocessor Folder.

3. Change both instances of LPC845M301JBD64 to LPC845M301JBD48.

4. Click on “Apply and Close”

3. Enable Config Tools and apply the previously create configuration to this new project.

1. Use the project Explore menu bar to launch Config Tools and Open Pins.

2. Ensure the correct project is from the drop-down menu in the tool bar.

3. Click on the Switch Package button is on the toolbar in the top right corner of the package window.

4. In the Pop-up Window Select LPC845M301JBD48- LQFP 48 package and click on OK.

5. Now we are going to import the .mex file that we download before. Go to File >> Import.

6. Inside the MCUXpresso Config Tools Folder Select “Import Configuration(*.mex)” and click on Next.

7. Select the. mex file downloaded previously as the Existing configuration, and the name of the current project as Target Project and click on Finish

8. Observe the pins that are activated and notice that the configuration is the same as in the previous case. Open the Clock Tool to see that the System clock has also been update to 30 MHz.
9. Now it’s time to implement these changes into the GPIO project by exporting the new updated pin_mux.c and pin_mux.h files that are generated by the Pins tool. Click on Update Project in the menu bar.

10. The screen that pops up will show the files that are changing, and you can click on “diff” to see the difference between the current file and the new file generated by the Pins tool. Click on “OK” to overwrite the new files into your project.

11. Now inside the IDE, open the hello_world.c file.

12. Replace the BOARD_BootClockFRO30M function for BOARD_InitBootClocks.

13. Open a terminal program and connect to the COM port the board enumerated as. Configure the terminal with these settings:
    • 115200 baud rate
    • No parity
    • 8 data bits
    • 1 stop bit
14. Build and Run the application like in the previous step. The hello_world application is now running, and a banner is displayed on the terminal. If this is not the case, check your terminal settings and connections.

15. Terminate the debug session.

1. Open the MCUXpresso Config Tool

2. In the wizard that comes up, select the “Open existing configuration” radio button, then select the project that you had clone and click on Next.
*Note: Previously, you had to clone a SDK project like in the past step, in case that you didn’t had, choose the option Clone SDK example and create a new configuration.
3. Open the pins tool by selecting Tools->Pins from the toolbar

4. Click on the Switch Package button is on the toolbar in the top right corner of the package window.

5. In the Pop-up Window Select LPC845M301JBD48- LQFP 48 package and click on OK.

6. Now we are going to import the .mex file downloaded in the past step. Go to File >> Import.

7. Select “Import Configuration(*.mex)” and click on Next.

8. Select the .mex file downloaded previously as the Existing configuration and click on Finish.

9. Observe the pins that are activated and notice that the configuration is the same as in the previous case. Open the Clock Tool to see that the System clock has also been update to 30 MHz
10. Now it’s time to implement these changes into the GPIO project by exporting the new updated pin_mux.c and pin_mux.h files that are generated by the Pins tool. Click on Update Project in the menu bar.

11. The screen that pops up will show the files that are changing, and you can click on “diff” to see the difference between the current file and the new file generated by the Pins tool. Click on “OK” to overwrite the new files into your project.

12. Now open the project, build and run like in the previous section.