3 Running the Demo

This section describes how to run the DRI demo, check the results on the board, and observe the frequency on an oscilloscope.

To run the demo, setup the PolarFire Evaluation board as explained in Run PROGRAM Action. This programs the evaluation kit with DRI design and ensures that all DIP switches of SW11 are ON. Execute the following tests:

TEST 1: Switch OFF SW11 DIP1 and change it back to ON to configure the transceiver in 1.25G at 31.25 MHz of TX and RX Clock frequency.

TEST 2: Switch OFF SW11 DIP2 and change it back to ON to configure the transceiver in 2.5G mode at 62.5 MHz of TX and RX Clock frequency.

TEST 3: Switch OFF SW11 DIP3 and change it back to ON to configure the transceiver in 5G mode at 125 MHz of TX and RX Clock frequency.

TEST 4: Switch OFF DIP5 and change it back to ON to configure OUT0 and OUT1 frequencies of Dynamic CCC.

TEST 5: Switch OFF DIP6 and change it back to ON to configure OUT2 and OUT3 frequencies of Dynamic CCC.

Important: The DIP switches are active-low on the Evaluation Kit. If more than one DIP switch is high, DIP1 has higher precedence over DIP2 and the XCVR ise configured for 1.2G, and so on.

The following table lists the status of LEDs as per selected inputs.

Table 3-1. Output Status-LED
Test No.Input/OutputLED4LED5LED7LED8LED9LED10LED11
TX_CLK_STABLERX_READYRX_VALStatus
TEST 1DIP1-1.25GONONONONOFFOFFOFF
TEST 2DIP2-2.5GONONONOFFONOFFOFF
TEST 3DIP3-5GONONONOFFOFFONOFF
TEST 4DIP5-CCC OUT0-OUT1ONONONOFFOFFONON
TEST 5DIP6-CCC OUT2-OUT3ONONONONONOFFOFF

Probe internal signals of the design from the PolarFire FPGA through test points to get the output frequency. Table 3-2 lists the output signals and probing points to observe the clock changes on an oscilloscope.

Important: For more information about the Jumper locations on the board, see the silkscreen in PolarFire FPGA Evaluation Kit User Guide.
Table 3-2. Output Status-Probe Test Points
SignalHeaderProbe Test Point
CC-Out2J7Pin-4
CC-Out3Pin-6
CC-Out0J8Pin-5
CC-Out1Pin-3
RX_CLK_RJ8Pin-9
TX_CLK_RJ8Pin-13