Xilinx UG133 manual Updating and Generation Hardware Files

Selecting a Software Application to be Loaded with a BOOT Loader after the FPGA is

R

The Calculator_App is a simple 3 function calculator. The 3 right most push button switches are Add (BTN0), Sub (BTN1), Mult (BTN2). The left most push button switch (BTN3) is a program reset, which will clear the calculator program. If the reset is pushed at this time, then the FPGA will need to be re-loaded.

The eight toggle switches directly under the 7-Segment display are divided into two 4 bit words. When the Add, Sub, or Mult push button switches are pushed, the selected calculator operation will be performed on the value of the toggle switches. If the toggle switches are set to:

Sw7=off, Sw6=off, Sw5=off, Sw4=off, Sw3=off, Sw2=off, Sw1=off, Sw0=off

Where Word 1 is 0 and Word 0 is 0

Add: 0+0=0

Sub: 0-0=0

Mult 0*0=0

If the toggle switches are set to:

Sw7=off, Sw6=off, Sw5=off, Sw4=ON, Sw3=off, Sw2=off, Sw1=ON, Sw0=ON

Where Word 1 is 1 and Word 0 is 3

Add: 3+1=4

Sub: 3-1=2

Mult 3*1=3

Each time one of the Push Button switches is pressed, the result should be displayed in ‘decimal’ on the 7-Seg display, and it will also be sent to the hyperterminal through the UART. The hyperterminal display should show:

3 + 1 = 4

Push button to start math operation...

3 - 1 = 2

Push button to start math operation...

3 * 1 = 3

Push button to start math operation...

The next section will show how to load this same program after the FPGA has been configured.

Selecting a Software Application to be Loaded with a BOOT Loader after the FPGA is Configured and the Processor is Running

This step will show an example of how a Hardware Application can be initially loaded with a “Stub” program. This will configure the MicroBlaze Microcontroller where it is waiting to be loaded with the actual Software Application.

Updating and Generation Hardware Files

Please select the XPS software Application tab. There are 3 options that can be selected when choosing the Software Application. This example will show how a Software Application can be loaded after the FPGA is configured. A Software Applications can be

MicroBlaze Microcontroller Ref Des User Guide www.xilinx.com 8

UG133 January 7, 2005