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example: Clean up and annotate USB UART connections

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
This commit is contained in:
Alex Forencich
2025-03-20 17:32:31 -07:00
parent 315a4715ff
commit c7cf9cc1bf
33 changed files with 177 additions and 157 deletions
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18
example/KC705/fpga/fpga.xdc
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@@ -68,16 +68,16 @@ set_property -dict {LOC Y28 IOSTANDARD LVCMOS25} [get_ports {sw[3]}] ;# from SW
set_false_path -from [get_ports {sw[*]}]
set_input_delay 0 [get_ports {sw[*]}]
# UART
set_property -dict {LOC K24 IOSTANDARD LVCMOS25 SLEW SLOW DRIVE 12} [get_ports uart_txd]
set_property -dict {LOC M19 IOSTANDARD LVCMOS25} [get_ports uart_rxd]
set_property -dict {LOC L27 IOSTANDARD LVCMOS25 SLEW SLOW DRIVE 12} [get_ports uart_rts]
set_property -dict {LOC K23 IOSTANDARD LVCMOS25} [get_ports uart_cts]
# UART (U12 CP2103)
set_property -dict {LOC K24 IOSTANDARD LVCMOS18 SLEW SLOW DRIVE 8} [get_ports {uart_txd}] ;# U12.24 RXD_I
set_property -dict {LOC M19 IOSTANDARD LVCMOS18} [get_ports {uart_rxd}] ;# U12.25 TXD_O
set_property -dict {LOC L27 IOSTANDARD LVCMOS18} [get_ports {uart_rts}] ;# U12.23 RTS_O_B
set_property -dict {LOC K23 IOSTANDARD LVCMOS18 SLEW SLOW DRIVE 8} [get_ports {uart_cts}] ;# U12.22 CTS_I_B
set_false_path -to [get_ports {uart_txd uart_rts}]
set_output_delay 0 [get_ports {uart_txd uart_rts}]
set_false_path -from [get_ports {uart_rxd uart_cts}]
set_input_delay 0 [get_ports {uart_rxd uart_cts}]
set_false_path -to [get_ports {uart_txd uart_cts}]
set_output_delay 0 [get_ports {uart_txd uart_cts}]
set_false_path -from [get_ports {uart_rxd uart_rts}]
set_input_delay 0 [get_ports {uart_rxd uart_rts}]
# I2C interface
#set_property -dict {LOC K21 IOSTANDARD LVCMOS25 SLEW SLOW DRIVE 8} [get_ports i2c_scl]