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recompiling-firmware.md

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Recompiling Firmware:

All boards shipped on or after February 20, 2017 come pre-installed with the Arduino Zero/M0 bootloader and the Arduino-based code. This means that you no longer need a JTAG programmer or Atmel Studio to customize the code on the SAMD21 microcontroller on the board.

In addition, the new Arduino-based firmware now streams over USB the same data sent to the Raspberry Pi's UART pins. This now means that the HealthyPi works not just with a Raspberry Pi, but any Windows/MAC/Linux machine that supports Java and Processing.

However, if you would like to edit the firmware, here's the steps to do that in Atmel Studio 7:

  • Atmel Studio 7 : Please note that Atmel Studio 7 is available only for Windows and does not support Mac and Linux . This is the IDE software that can do step & memory debugging and its only for Windows. Also you have to make an account on Atmel's site. The IDE can be downloaded from Atmel Studio's Official Website

Load the Healthy Pi Source Code

  • Step 1 : Start by launching Atmel Studio 7.

  • Step 2 : Open the Project file in the firmware folder of this git respitory

  • Step 3 : You'll see the following, where the sketch is in a window, you can edit the code here if you like.

Debugger

You need a debugger to load the code into the SAMD21G18A. Atmel-ICE will help get from here http://www.atmel.com/tools/atatmel-ice.aspx

Step 1 : Set Up and Check Interface

  • Attach the chip & debugger

Step 2 : Identify Interface

  • OK now you have your debugger plugged in, its good to check that it works, select Device Programming.
  • Choose "Device Programmer" from "Tools" Menu
  • Programming window will be open.
  • Select the programmer from the drop down box. Select interface as “SWD”. Click on “Apply”.
  • Now read the Power and Device ID. If you are able to read the Device ID then the interface is fine.

Step 3 : Build & Start Debugging

  • Ok close out the modal programming window and build the program. If there are no error, then your build will be successful.

Step 4 : Run & Upload

  • You will see a window appearing to select a debugging tool. Select the tool and interface.
  • Once done, go back and Re-run Program without debugging.