test environment for controller and dma project

designs/controller_dma_connective/tests/test_timing.xdc

@@ -0,0 +1,13 @@
+# Primary clocks
+create_clock -name eth_clk -period 8.000  [get_ports eth_clk_in]
+create_clock -name dac_clk -period 7.692  [get_ports dac_clk_in]
+create_clock -name adc_clk -period 15.385 [get_ports adc_clk_in]
+
+
+# Asynchronous clock groups
+# eth, dac, adc are independent domains
+
+set_clock_groups -name ASYNC_ETH_DAC_ADC -asynchronous \
+    -group [get_clocks eth_clk] \
+    -group [get_clocks dac_clk] \
+    -group [get_clocks adc_clk]