Harp – Core Library for the 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)

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.