1.1.12 SAM C21N Xplained Pro Evaluation Kit: Building and Running the UART Bootloader 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/uart_bootloader/

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

Bootloader Application

Project NameDescription
bootloader/firmware/sam_c21n_xpro.XMPLABX Project for SAM C21N Xplained Pro Evaluation Kit

Test Application

Project NameDescription
test_app/firmware/sam_c21n_xpro.XMPLABX Project for SAM C21N Xplained Pro Evaluation Kit

Setting up SAM C21N Xplained Pro Evaluation Kit

  • Connect the Debug USB port on the board to the computer using a micro USB cable

Setting up the host script

Running the Application

  1. Open the test application project test_app/firmware/sam_c21n_xpro.X in the IDE

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

  3. Open the bootloader project bootloader/firmware/sam_c21n_xpro.X in the IDE

  4. Build and program the application using the IDE

  5. 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 samc2x -a 0x800 -f <harmony3_path>/bootloader_apps_uart/apps/uart_bootloader/test_app/firmware/sam_c21n_xpro.X/dist/sam_c21n_xpro/production/sam_c21n_xpro.X.production.bin

  6. Following snapshot shows output of successfully programming the test application

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

    output

  7. If above step is successful then the LED0 should start blinking

  8. Open the Terminal application (Ex.:Tera Term) on the computer

  9. Configure the serial port settings as follows:

    • Baud : 115200

    • Data : 8 Bits

    • Parity : None

    • Stop : 1 Bit

    • Flow Control : None

  10. Reset or Power cycle the device

  11. LED0 should start blinking and you should see below output on the console

    output

  12. Press and hold the Switch SW0 to trigger Bootloader from test application and you should see below output

    output

  13. Repeat Steps 5-11 once and jump to Step-14.

    • This step is to verify that bootloader is running after triggering bootloader from test application in Step 12

  14. Press and hold the Switch SW0 and then press Reset button or Power cycle the device to force trigger bootloader at startup

  15. Repeat Steps 5-11 once

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

Additional Steps (Optional)