# Specify root clocks
create_clock -period "50.0 MHz" [get_ports FPGA_CLK1_50]
create_clock -period "50.0 MHz" [get_ports FPGA_CLK2_50]
create_clock -period "50.0 MHz" [get_ports FPGA_CLK3_50]
create_clock -period "100.0 MHz" [get_pins -compatibility_mode *|h2f_user0_clk] 

derive_pll_clocks

# Specify PLL-generated clock(s)
create_generated_clock -source [get_pins -compatibility_mode {*|pll|pll_inst|altera_pll_i|general[1].gpll~PLL_OUTPUT_COUNTER|divclk}] \
                       -name SDRAM_CLK [get_ports {SDRAM_CLK}]

create_generated_clock -source [get_pins -compatibility_mode {pll_hdmi|pll_hdmi_inst|altera_pll_i|cyclonev_pll|counter[0].output_counter|divclk}] \
                       -name HDMI_CLK [get_ports HDMI_TX_CLK]

create_generated_clock -source [get_pins { pll_hdmi|pll_hdmi_inst|altera_pll_i|cyclonev_pll|counter[0].output_counter|divclk}] \
                       -name VID_CLK -divide_by 2 -duty_cycle 50 [get_nets {vip|output_inst|vid_clk}]


derive_clock_uncertainty


# Set acceptable delays for SDRAM chip (See correspondent chip datasheet) 
set_input_delay -max -clock SDRAM_CLK 6.4ns [get_ports SDRAM_DQ[*]]
set_input_delay -min -clock SDRAM_CLK 3.7ns [get_ports SDRAM_DQ[*]]

set_multicycle_path -from [get_clocks {SDRAM_CLK}] \
                    -to [get_clocks {*|pll|pll_inst|altera_pll_i|general[0].gpll~PLL_OUTPUT_COUNTER|divclk}] \
                                                  -setup 2

set_output_delay -max -clock SDRAM_CLK 1.6ns [get_ports {SDRAM_D* SDRAM_A* SDRAM_BA* SDRAM_n* SDRAM_CKE}]
set_output_delay -min -clock SDRAM_CLK -0.9ns [get_ports {SDRAM_D* SDRAM_A* SDRAM_BA* SDRAM_n* SDRAM_CKE}]

# Decouple different clock groups (to simplify routing)
set_clock_groups -asynchronous \
   -group [get_clocks { *|pll|pll_inst|altera_pll_i|general[*].gpll~PLL_OUTPUT_COUNTER|divclk}] \
   -group [get_clocks { pll_hdmi|pll_hdmi_inst|altera_pll_i|cyclonev_pll|counter[0].output_counter|divclk VID_CLK}] \
   -group [get_clocks { *|h2f_user0_clk}] \
   -group [get_clocks { FPGA_CLK1_50 FPGA_CLK2_50 FPGA_CLK3_50}]

set_output_delay -max -clock HDMI_CLK 2.0ns [get_ports {HDMI_TX_D[*] HDMI_TX_DE HDMI_TX_HS HDMI_TX_VS}]
set_output_delay -min -clock HDMI_CLK -1.5ns [get_ports {HDMI_TX_D[*] HDMI_TX_DE HDMI_TX_HS HDMI_TX_VS}]

# Put constraints on input ports
set_false_path -from [get_ports {KEY*}] -to *
set_false_path -from [get_ports {BTN_*}] -to *

# Put constraints on output ports
set_false_path -from * -to [get_ports {LED_*}]
set_false_path -from * -to [get_ports {VGA_*}]
set_false_path -from * -to [get_ports {AUDIO_SPDIF}]
set_false_path -from * -to [get_ports {AUDIO_L}]
set_false_path -from * -to [get_ports {AUDIO_R}]