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Processor SDK RTOS Template App

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RTOS Software Developer Guide RTOS Template App


The RTOS template application is intended for customers to use as a starting point during software development using Processor SDK RTOS software. The template application can be quickly brought up by importing the included CCS project into CCS development environment. The application currently includes the typical low level drivers (UART, GPIO, I2C), OSAL layer, and Board Library. For additional details refer to the README.txt file in the installed package.

Supported platforms

  • evmAM572x
  • evmAM335x


Following are required to run the application:


  • TI EVM (see list above)
  • Serial UART cable (provided in EVM kit)


  • Processor-SDK RTOS
  • Code Composer Studio

Components Used

RTOS Components:

  • XDCTools
  • Processor SDK RTOS PDK: Drivers, OSAL, etc.

Software Design

The Template Application is designed to provide a foundation with clean separation of application specific sub-module. This allows users the ability to focus on application specific code and quickly get it to run.
This is achieved by separating "main" and "app" sub modules in different files.

The source files are organized as follows:

          └── template_app
              ├── main.c --> Main file including startup and init code
              ├── main.cfg --> Main BIOS config file
              ├── app.c  --> Application tasks are here
              ├── app.h  --> Application header file
              ├── app.cfg --> Application specific config file
              ├── app.defs --> Definitions (Currently empty)
              ├── rtos_template_app_<SOC>_<core>_<board>.projectspec --> Project spec file

In general to write a new application, app.c and app.h can be modified, recompiled, and run.

How to Build the Template Application

Please follow below step by step procedure to build the application.

  1. Processor SDK RTOS and Code Composer Studio.
  2. Install Processor SDK RTOS ( AM57x, AM335x) respectively, in a location where CCS expects: (by default $HOME/ti or c:/ti) Refer Processor SDK RTOS Getting Started Guide for details.
  3. Open CCS:
  4. Click Project-->Import CCS Projects and select rtos_template_app under directory : <Processor_sdk_rtos_<platform>_<version>/demos/rtos_template_app/ (NOTE: This will create project under current workspace and also copy relevant files for the project.)
  5. Build the application . ( By right clicking on imported project and clicking "Build project") (NOTE: This will create executable binary under rtos_template_app_<platform>/Debug/rtos_template_app_<platform>_<core>.out)

How to Run the Template Application

You will need the following:

  1. Install Code Composer Studio to load and run the Template Application. Refer to Processor SDK RTOS Getting Started Guide for installing CCS.
  2. evmAM572x or evm AM335x board
  3. JTAG Emulator

To load and run Template Application:

  1. Connect the computer to the JTAG port on the board using the JTAG emulator.
  2. Power on evm574x or evm335x board. Ensure that no boot mode is entered (do not have SD card loaded or QSPI flashed)
  3. Open up a serial terminal for UART communication (Refer to Processor SDK RTOS Getting Started Guide, setup EVM hardware)
  4. Open CCS and launch target config file for the EVM (Refer to Processor SDK RTOS Setup CCS for setting up CCS)
  5. Connect to A15_0 core for AM572x ( A8 core for AM335x).
  6. Load executable by clicking("Run --> Load --> Load Program.). Click on Browse Project and select outfile under: rtos_template_app_<platform><core>/Debug/rtos_template_app<platform>_<core>.out
  7. Run application by clicking the Run icon. ( Or Click Run --> Resume)

Now application will run and print progress through the UART.

  • Press enter to get UART prompt.

uart_task :Enter a word or Esc to quit >

  • Enter any word following by <CR>

The application will print back the entered word

  • Enter [ESC-<CR>]

The application will exit.

Terminal Screenshot

Board Init complete
Uart Init complete
I2C Init complete
Gpio Init complete
MCSPI Init complete
======== Peripheral Initialization complete ========
======== Starting to create application tasks ========
    gpio_toggle_led_task task created.
    uart_task task created.
    spi_test_task task created.
    i2c_eeprom_read_and_display_task task created.
    ======== Application tasks created successfully ========
    gpio_toggle_led task started
    uart_task task started uart_task :Enter a word or Esc to quit >
    i2c_eeprom_read_and_display task started
    spi_test task started
    Board Name read: AM572PM_
    Board version read: A.3A
    spi_test task ended
    i2c_eeprom_read_and_display task ended
    uart_task :Enter a word or Esc to quit >
    uart_task :Enter a word or Esc to quit >testing
    Data received is:testing
    uart_task :Enter a word or Esc to quit >command
    Data received is:command
    uart_task :Enter a word or Esc to quit >^[
    uart_task task ended
    Template app ended

Porting to Custom Board

The Template Application can be easily modified to run on a custom board. The main change is to link in a new Board Library. Modification for customer board can be achieved by just removing ti.board library and PATH from the project and replacing with customer specific board library and PATH under the linker Build Options under CCS.
e.g. Currently the library linked for AM572x is specified in the .projectspec file as follows.

       " -L${TI_PDK_INSTALL_DIR}/packages/ti/board/lib/evmAM572x/a15/release/

Currently for AM572x there is also dependency on the GPIO_evmAM572x_board.c & GPIO_board.h. These files can be modified to customize for the customer board.