Additional Details

Table of Contents

• Alternate Method to Build and Run the examples
  • SOC Initialization
    • SOC Initialization Using CCS
    • SOC Initialization using the Binary Flashed in QSPI memory
  • Run the example

Alternate Method to Build and Run the examples

Note

These steps are optional.

Below method cab be used for running examples built with makefiles

• Step 1: Build a "hello world" example for the EVM, see Build a Hello World example
• Step 2: Load and run the "hello world" example on the EVM, see CCS Launch, Load and Run
• Step 3: Flash the "hello world" example on the EVM and boot without CCS, see Flash a Hello World example

SOC Initialization

Before any program can be loaded and run on the EVM, the SOC needs to be initialized. Below sections describes the various options available for SOC initialization.

SOC Initialization Using CCS

• POWER-OFF the EVM
• Make sure below cables are connected as shown in Cable Connections
  • Power cable
  • JTAG cable
• the boot mode should be NOBOOT MODE
• POWER-ON the EVM
• Now you can build a example of interest (see Build a Hello World example) and then run it (see CCS Launch, Load and Run)
• Now you can Connect to any of the Cortex_R5_0/Cortex_R5_1/C66xx_DSP cores, load programs and run (see Load and run example binaries)

SOC Initialization using the Binary Flashed in QSPI memory

Note

This is a one time step that needs to be done before you can load and run programs via CCS

If this step fails, maybe due to bad flash in EVM, then try one of the other SOC initialization steps mentioned at SOC Initialization

This step needs to be done once unless the QSPI flash has been erased or some other application has been flashed

• A quick recap of steps done so far that are needed for the flashing to work
  • Make sure the UART port used for terminal is identified as mentioned in Setup UART Terminal
  • Make sure python3 is installed as mentioned in Python3
  • Make sure you have the EVM power cable and UART cable connected as shown in Cable Connections
• POWER-OFF the EVM
• The boot mode should be UART BOOT MODE
• POWER-ON the EVM
• You should see character "C" getting printed on the UART terminal every 1-2 seconds as shown below

UART output in UART BOOT MODE

• Close the UART terminal as shown below. This is important, else the UART script in next step wont be able to connect to the UART port.

Close UART terminal

• Open a command prompt and run the below command to flash the SOC initialization binary to the EVM.

    cd ${SDK_INSTALL_PATH}/tools/boot
    python uart_uniflash.py -p COM<x> --cfg=sbl_prebuilt/am273x-evm/default_sbl_null.cfg
  

  • Here COM<x> is the port name of the identified UART port in Windows.
  • On Linux,
    • The name for UART port is typically something like /dev/ttyUSB0
    • On some Linux systems, one needs to use python3 to invoke python3.x, just python command may invoke python 2.x which will not work with the flashing script.
• When the flashing is in progress you will see something like below

Flash in progress

• After all the flashing is done, you will see something like below

Flashing successful

• If flashing has failed, see Flash tool error messages and solutions, and resolve the errors.
• If flashing is successful, do the next steps ...
• POWER-OFF the EVM
• Change the boot mode to QSPI BOOT MODE
• POWER-ON the EVM
• Re-connect the UART terminal in CCS window as shown in Setup UART Terminal
• Press the reset button on the board as shown in Cable Connections
• You should see output like below on the UART terminal

    Starting NULL Bootloader ...
    NULL Bootloader Execution Complete...
  

• Now the EVM is setup for loading and running from CCS !!!
• You dont need to do these steps again unless you have flashed some other binary to the flash.

Run the example

• Now you can run the example built (see CCS Launch, Load and Run)
• Connect to any of the Cortex_R5_0/Cortex_R5_1/C66xx_DSP cores, load programs and run (see Load and run example binaries)