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spi_engine_execution: Add constraints file

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Istvan Csomortani 2021-01-13 15:38:07 +00:00 committed by István Csomortáni
parent ab10bd136e
commit 93f46ef6e3
3 changed files with 33 additions and 0 deletions
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1
library/spi_engine/spi_engine_execution/Makefile
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@ -8,6 +8,7 @@ LIBRARY_NAME := spi_engine_execution
GENERIC_DEPS += spi_engine_execution.v
XILINX_DEPS += spi_engine_execution_ip.tcl
XILINX_DEPS += spi_engine_execution_constr.ttcl
XILINX_DEPS += ../../spi_engine/interfaces/spi_engine_ctrl.xml
XILINX_DEPS += ../../spi_engine/interfaces/spi_engine_ctrl_rtl.xml

30
library/spi_engine/spi_engine_execution/spi_engine_execution_constr.ttcl Normal file
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@ -0,0 +1,30 @@
<: set ComponentName [getComponentNameString] :>
<: setOutputDirectory "./" :>
<: setFileName [ttcl_add $ComponentName "_constr"] :>
<: setFileExtension ".xdc" :>
<: setFileProcessingOrder late :>
<: set echo_sclk [getBooleanValue "ECHO_SCLK"] :>
# Relax the timing between the SDI shift register and DMA. The shift register
# runs at negative edge of echoSCLK and the DMA runs at spi_clk. Registers
# will have valid data at worst case (fastest rate) in every 8 echoSCLK cycle.
set_multicycle_path -setup -from [get_pins -hier -filter {name=~*data_sdi_shift_reg[*]/C}] 8
set_multicycle_path -hold -from [get_pins -hier -filter {name=~*data_sdi_shift_reg[*]/C}] 7
# word_length is updated before transfer, never changes during transfer, therefor
# it's safe to define a false path between word_length and sdi_counter
set_false_path -from [get_cells -hierarchical -filter {NAME=~*word_length_reg[*]}] -to [get_cells -hierarchical -filter {NAME=~*sdi_counter_reg[*]}]
<: if { $echo_sclk } { :>
## SDI counter runs on echo_SCLK but sdi_data_valid is generated with spi_clk which
# is synchronous to SCLK. The last_sdi_bit should be transferred into spi_clk domain.
set_property ASYNC_REG true [get_cells -hier {*last_sdi_bit_m_reg[0]}]
set_property ASYNC_REG true [get_cells -hier {*last_sdi_bit_m_reg[1]}]
set_false_path -to [get_cells -hier -filter {name =~ *last_sdi_bit_m_reg[0]* && IS_SEQUENTIAL}]
# SDI shift registers are reset asynchronously after a negative edge of CSN - define the reset line as a false path
set_false_path -to [get_pins -hierarchical -filter {NAME=~*g_echo_sclk_miso_latch.*.data_sdi_shift_reg[*]/CLR}]
<: } :>

2
library/spi_engine/spi_engine_execution/spi_engine_execution_ip.tcl
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@ -4,10 +4,12 @@ source $ad_hdl_dir/library/scripts/adi_ip_xilinx.tcl
adi_ip_create spi_engine_execution
adi_ip_files spi_engine_execution [list \
"spi_engine_execution_constr.ttcl" \
"spi_engine_execution.v" \
]
adi_ip_properties_lite spi_engine_execution
adi_ip_ttcl spi_engine_execution "spi_engine_execution_constr.ttcl"
# Remove all inferred interfaces
ipx::remove_all_bus_interface [ipx::current_core]