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# 1.1.10 PIC32MX Curiosity Development Board: Building and Running the USB Device HID Bootloader applications

## Downloading and building the application

To clone or download these 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 be download using content manager by following these instructions.

Path of the application within the repository is apps/usb_device_hid_bootloader/

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

### Bootloader Application

Project Name | Description
--- | ---
bootloader/firmware/pic32mx470_curiosity.X | MPLABX Project for PIC32MX Curiosity Development Board

### Test Application

Project Name | Description
--- | ---
test_app/firmware/pic32mx470_curiosity.X | MPLABX Project for PIC32MX Curiosity Development Board

## Setting up PIC32MX Curiosity Development Board

- Install an USB UART click board on to the mikroBUS socket J5
- Connect mini USB cable to the USB UART click board. This will enumerate the USB to UART port
  - Note: Ensure that the series resistors on the mikroBUS headers are of value 0 Ohms
- For programming, Connect mini USB cable to the 'Debug USB' connector(J3) on the board to the computer
- Use the USB micro-B port J12 to connect the USB Device to the USB Host PC
- Jumper J13 should be open

## Running the Application

1. Open the test application project test_app/firmware/pic32mx470_curiosity.X in the IDE

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

3. Open the bootloader project bootloader/firmware/pic32mx470_curiosity.X in the IDE

4. Build and program the application using the IDE

5. Once programming is completed and bootloader starts running

   - LED1 will be Turned On
   - HID Custom device with product ID 3C will be enumerated on Host PC

6. Open the Terminal application (Ex.:Tera Term) on the computer to get test application messages through UART once bootloaded

7. Configure the serial port settings as follows:

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

8. Launch the Unified Host application from below path

   - <harmony3_path>/bootloader/tools/UnifiedHost-*/UnifiedHost-*.jar

9. Configure the Unified host application

   - Select the Device architecture and Protocol as shown below

   - Click on configure button and select the USB Device as 3C

   - Load the test application hex file to be programmed using below option

     - <harmony3_path>/bootloader_apps_usb/apps/usb_device_hid_bootloader/test_app/firmware/pic32mx470_curiosity.X/dist/pic32mx470_curiosity/production/pic32mx470_curiosity.X.production.hex

   - Open the Console window of the host application to view application bootloading sequence

10. Click on Program Device button to program the loaded test application hex file on to the device

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

12. If above step is successful then LED3 should start blinking and the user should see below output on the console

13. Press and hold the Switch S1 to trigger Bootloader from test application and the user should see below output

14. Repeat Steps 10-12 once and jump to Step-15

    - This step is to verify that bootloader is running after triggering bootloader from test application in Step 13

15. Press and hold the Switch S1 and then press MCLR button or Power cycle the device to force trigger bootloader at startup

16. Repeat Steps 10-12 once

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

Note

- Unified Host application has to be closed in order to program any application using MPLAB X IDE

## Additional Steps (Optional)

- To bootload any other application refer to the Application Configurations

- Once done repeat the applicable steps mentioned in Running The Application