ATxmega Core
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Harp Core ATxmega

Folder containing the source files for the library that implements Harp on the Atmel's ATxmega family of microcontrollers.

What is the Core Library for the ATxmega?

It's a piece of code that implements the Harp infrastructure into the microcontroller. The output is a library that is then included in each Harp device's project using Atmel Studio.

ATxmega is a familly of microcontrollers provided by Atmel.

The main features are:

  • Take care of the comunication with the computer (including Tx and Rx buffers)
  • Implement the Harp protocol
  • Implement the Common and User registers banks
  • Manage the timestamp and synchronization
  • Control the state LED
  • Initialize and handle microcontroller's clock

What can I find on this folder?

The source code to construct the Harp library for Atxmega

What software do I need to view or open the files?

The code is developed on the Atmel's IDE with the name Atmel Studio.

How do I get set up?

Compile the Harp Core

  1. Install the Atmel Studio.
  2. Open the solution named Core.atsln on the folder Firmware.
  3. To compile, use the command Build > Rebuild Solution (that can be issued using the shortcut Ctrl+Alt+F7).
  4. The output library (files with extension .a) can be found on the folder **Firmware\Core\Debug**.

Choose the right microcontroller connections

On the Harp devices, two packages are being used: 44 and 100 pins. The main advantage of using 100 pins (of course, more GPIOS) is that this package offers more timers.

Connections for the 44 pins version (using ATxmega128A4U)

CoreLibrary

Note: It's recommended a good 32 MHz clock source, like the MEMS Oscillator DSC1001CI5-032.0000T from Microchip that can be found on Mouser or Digi-Key.

Connections of the current supported microcontrollers

Signal
Main Serial: CTS PE0 PE0 PJ6 PE0
Main Serial: RTS PE1 PE1 PK0 PE1
Main Serial: RX PE2 PE2 PF2 PE2
Main Serial: TX PE3 PE3 PF3 PE3
Timestamp: In PC2 PD6 PC6 PC2
State LED PR0 PD5 PA6 PR0
Auxiliar Serial: RX Not Used Not Used Not used PD2
Auxiliar Serial: TX Not Used Not Used Not used PD3
Microcontroller used ATxmega32A4U ATxmega64A4U ATxmega128A1U ATxmega128A4U
Internall Buffer 2 KBytes 2 KBytes 6 KBytes 6 KBytes
Library to Use libATxmega32A4U.a libATxmega64A4U.a libATxmega128A1U.a libATxmega128A4U.a

Licensing

Each subdirectory will contain a license or, possibly, a set of licenses if it involves both hardware and software.