Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

Comments, feedback, and questions can be sent to eewiki@digikey.com. Wiki Markup

{wiki}

{toc:style=disc|indent=20px}

h1. Availability

The original version of the MachXO2 Breakout Board featured an LCMXO2-1200ZE-1TG144C CPLD, which has now been replaced on a new version of the board by an LCMXO2-7000HE-4TG144C.


The new version of the MachXO2 breakout board (LCMXO2-7000HE-B-EVN) is available from Digi-Key [here|http://www.digikey.com/scripts/dksearch/dksus.dll?keywords=220-2625-ND].


The old version of the MachXO2 breakout board (LCMXO2-1200ZE-B-EVN) is available while supplies last from Digi-Key [here|http://www.digikey.com/product-detail/en/LCMXO2-1200ZE-B-EVN/220-1298-ND/2798385].


h1. VHDL Code for Tutorial

[^blinking_led.vhd]

















h1. Introduction

This introduction to the Lattice Diamond software (version 4.1.87) walks through creating a simple project for the MachXO2 Breakout Board Evaluation Kit.  It works with either version of the kit.  Topics include starting a new project, code entry, using the internal oscillator, compiling, making pin assignments, and programming the board.  There is a separate tutorial that covers simulation [here|LOGIC:Lattice Diamond Hierarchical Design Test Bench Tutorial].


h1. Creating a New Project

 To create a new project, select *File \-> New \-> Project...*, and the New Project Wizard launches.  Click *Next*.  Enter a project name and location as shown in Figure 1, and click *Next*.

!new_project_wizard_1.JPG!


*Figure 1. * Entering the project name and location.

This project does not use pre-existing source files.  Click *Next*.

Specify the device family as *MachXO2*, the device as *LCMXO2-7000HE* or *LCMXO2-1200ZE* (depending on which version of board you have), the package type as *TQFP144*, the performance grade as *4* (if using the 7000HE) or *1* (if using the 1200ZE), and the operating conditions as *Commercial*.  Some of these criteria must be selected before others for the proper options to populate in the drop-down lists.  The complete part number, *LCMXO2-7000HE-4TG144C* or *LCMXO2-1200ZE-1TG144C*, appears in the part name text box as depicted in Figure 2.  Click *Next*.  Click *Finish*.

!new_project_wizard_2.JPG!
*Figure 2. * Selecting the device.

h1. Code Entry and Instantiating the Internal Oscillator

To create a new source file, select *File \-> New \-> File…*.  Select the category *Source Files* and the source file type *VHDL Files* as shown in Figure 3.  Name the new file and click *New*.

!creating_vhdl_file.JPG!
*Figure 3.*  Creating a VHDL file.

The provided blinking_led.vhd example code uses the MachXO2’s internal oscillator to toggle an LED twice per second.  To use the oscillator OSCH primitive, either the “lattice” or the “machxo2” library must be instantiated:

{code}
LIBRARY lattice;
USE lattice.components.all;

LIBRARY machxo2;
USE machxo2.all;
{code}

The OSCH component is declared as follows:
{code}
   COMPONENT OSCH
      GENERIC(
            NOM_FREQ: string := "53.20"); --53.20MHz, or can select other supported frequencies
      PORT(
            STDBY    : IN  STD_LOGIC;     --'0' OSC output is active, '1' OSC output off
            OSC      : OUT STD_LOGIC;     --the oscillator output
            SEDSTDBY : OUT STD_LOGIC);    --required only for simulation when using standby
   END COMPONENT;
{code}

For this example project, the OSCH instance is instantiated as follows:

{code}
   OSCInst0: OSCH
      GENERIC MAP (NOM_FREQ  => "53.20")
      PORT MAP (STDBY => '0', OSC => clk, SEDSTDBY => OPEN);
{code}
See the appendix at the bottom of this page for a list of OSCH supported frequencies.

h1. Pin Assignments and Compilation

Select the *Process* Pane as depicted in Figure 4.  Double-click on *Translate Design* in the Process pane to perform synthesis and translation.

!process_pane.JPG|width=793,height=495!
*Figure 4.*  Selecting the Process pane.

Select *Tools \-> Spreadsheet View*.  Click on the *Pin Assignments* tab at the bottom of the Spreadsheet View.  Scroll down until *Pin 107* appears.  Double-click in the *Signal Name* column of Pin 107.  The *Assign Signals* dialog box appears as shown in Figure 5.

 !assign_signals.JPG!
*Figure 5. * Assigning pins.

Select the *led* signal and click *Assign Signals* to assign it to pin 107.  Pin 107 is connected to LED D8 on the MachXO2 breakout board.  Figure 6 shows the resulting signal assignment.

!assign_signals_complete.JPG!
*Figure 6. * Assigning pins completed.

Return to the *Process* pane, check *JEDEC File* under *Export Files*.  Double-click on *Export Files* to Map, Place & Route, and create the JEDEC programming file.  If asked to save modified files, do so.  Figure 7 illustrates the successful outcome.

 !successful_comilation.JPG!
*Figure 7.*  Successful Compilation

h1. Programming the CPLD

Plug the MachXO2 breakout board into the computer via the USB cable.

Select *Tools \-> Programmer*.  The *Programmer: Getting Started* dialog box opens as shown in Figure 8.  Click *OK*.

!opening_programmer.JPG!
*Figure 8.*  Opening the programmer.

Click the *Program* icon.  The device programs.  Once complete, the *Status* indication turns green as depicted in Figure 9.  LED D8 on the MachXO2 breakout board blinks once per second.

!programmer_success.JPG!

*Figure 9. * Programming completed successfully.

h1. Conclusion

This introduction to the Lattice Diamond software and the MachXO2 breakout board demonstrates the essential steps to create a simple project with these tools.

h1. Appendix: OSCH Supported Frequencies

The default frequency is 2.08MHz.  Supported frequencies (in MHz) include:

2.08        4.16          8.31           15.65

2.15        4.29          8.58           16.63

2.22        4.43          8.87           17.73

2.29        4.59          9.17           19.00

2.38        4.75          9.50           20.46

2.46        4.93          9.85           22.17

2.56        5.12         10.23         24.18

2.66        5.32         10.64         26.60

2.77        5.54         11.08         29.56

2.89        5.78         11.57         33.25

3.02        6.05         12.09         38.00

3.17        6.33         12.67         44.33

3.33        6.65         13.30         53.20

3.50        7.00         14.00         66.50

3.69        7.39         14.78         88.67

3.91        7.82         15.65       133.00

h1. Contact

Comments, feedback, and questions can be sent to [mailto:eewiki@digikey.com].

{wiki}