1.3.7 SAMA5D2 Xplained Ultra Evaluation Kit: Building and Running the UART Bootloader With Serial Flash Media Applications

Downloading and Building the Application

To clone or download this application from Github, go to the main page of this repository and then click Clone button to clone this repo or download as zip file. This content can also be download using content manager by following these instructions.

Path of the application within the repository is apps/mpu_uart_bootloader/.

To build the application, refer to the following table and open the project using its IDE.

Setting Up SAMA5D2 Xplained Ultra Evaluation Kit

  • Short jumper JP2 (DEBUG_DIS)
  • Connect the J14 Debug USB port on the board to the computer using a micro USB cable
  • Connect the J23 USB port on the board to the computer using a micro USB cable
  • Open BOOT_DIS JP9 jumper

Setting Up the Host Script

Running the Application

  1. Open the test application project test_app/firmware/sam_a5d2_xult.X in the IDE.

  2. Build the project to generate the harmony.bin binary (Do not program the binary).

  3. Open the bootloader project bootloader_serial_flash/firmware/sam_a5d2_xult.X in the IDE.

  4. Build the project to generate the harmony_bootloader.bin binary (Do not program the binary).

  5. Download and unzip SAM-BA.

  6. Open the command prompt and change the current directory to <harmony3_path>/bootloader_apps_uart/deps/at91bootstrap_binaries_sam_a5d2_xult/qspi_flash/ and run the below command:

     <sam-ba_path>/sam-ba.exe -p serial -b sama5d2-xplained -t 5 -a qspiflash -c erase::0x40000 -c writeboot:boot.bin

  7. Change the current directory to <harmony3_path>/bootloader_apps_uart/apps/mpu_uart_bootloader/bootloader_serial_flash/firmware/sam_a5d2_xult.X/dist/sam_a5d2_xult/production/ and run the below command:

     <sam-ba_path>/sam-ba.exe -p serial -b sama5d2-xplained -t 5 -a qspiflash -c erase:0x40000:0xa0000 -c write:harmony_bootloader.bin:0x40000

  8. Reset or Power cycle the device. Green LED will be turned-on to indicate that harmony bootloader code is running on the target.

  9. Run the btl_host.py from command prompt to program the application binary.

     python <harmony3_path>/bootloader/tools/btl_host.py -v -i <COM PORT> -d sama5 -p 256 -f <harmony3_path>/bootloader_apps_uart/apps/mpu_uart_bootloader/test_app/firmware/sam_a5d2_xult.X/dist/sam_a5d2_xult/production/harmony.bin

  10. Following figure shows output of successfully programming the test application.

    • Rebooting and Reboot Done messages in below output signifies that bootloading is successful

  11. If above step is successful then the Green LED should start blinking.

  12. Open the Terminal application (e.g., Tera Term) on the computer.

  13. Configure the serial port settings as follows:

    • Baud: 115200
    • Data: 8 Bits
    • Parity: None
    • Stop: 1 Bit
    • Flow Control: None

  14. Reset or Power cycle the device.

  15. Green LED should start blinking and the user should see below output on the console.

  16. Press and hold the Switch PB_USER and then press Reset button or Power cycle the device to force trigger bootloader at startup.

  17. Repeat Steps 9-15 once.

    • This step is to verify whether bootloader is triggered by switch press at reset