add de1_dacHEADmaster

1 files changed, 21 insertions, 0 deletions

diff --git a/pnr/de1_dac/de1_dac_special.sdc b/pnr/de1_dac/de1_dac_special.sdc
new file mode 100644
index 0000000..17260a6
--- /dev/null
+++ b/pnr/de1_dac/de1_dac_special.sdc
@@ -0,0 +1,21 @@
+create_clock -period 20.000 -name CLOCK_50 [get_ports CLOCK_50]
+
+set default_inputs [get_ports KEY0]
+set default_inputs [add_to_collection $default_inputs [get_ports ADC_OTR*]]
+
+# Some clock for ADC/DAC Board
+set clock_outputs [get_ports ADC_CLK*]
+set clock_outputs [add_to_collection $clock_outputs [get_ports DAC_CLK*]]
+set clock_outputs [add_to_collection $clock_outputs [get_ports DAC_WRT*]]
+
+set default_outputs [remove_from_collection [all_outputs] [get_ports DAC_D*]] 
+set default_outputs [remove_from_collection $default_outputs $clock_outputs]
+
+# Default Timing Constrains for Inputs/Outputs
+set_input_delay -clock CLOCK_50 5 $default_inputs
+set_output_delay -clock CLOCK_50  5 $default_outputs
+# Special Timing for ADC and DAC Data I/O
+set_input_delay -clock CLOCK_50 17 [get_ports ADC_D*]
+set_output_delay -clock CLOCK_50 -clock_fall 7 [get_ports DAC_D*]
+# Special Timing for clock outputs 
+set_output_delay -clock CLOCK_50 2 $clock_outputs