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experiments/uart: wire up a top-level UART for ulx3s

This commit is contained in:
David Anderson 2024-09-09 12:47:19 -07:00
parent 379ebf0411
commit a08fd421fe
2 changed files with 66 additions and 0 deletions
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33
experiments/uart/Top.bsv Normal file
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package Top;
import GetPut::*;
import UART::*;
(* always_enabled *)
interface Top;
(* prefix="" *)
method Action rx_in((* port="rx_in" *) bit b);
method bit tx_out();
method Bit#(8) leds();
endinterface
(* synthesize *)
module mkTop(Top);
let _ret <- mkUART(100_000_000, 115_200);
disableFlowControl(_ret);
Reg#(Bit#(8)) leds_out <- mkReg(0);
rule recv;
let b <- _ret.receive.get();
_ret.send.put(b);
leds_out <= b;
endrule
method rx_in = _ret.phy.rx_in;
method tx_out = _ret.phy.tx_out;
method leds = leds_out._read;
endmodule
endpackage

33
experiments/uart/pin_map.lpf Normal file
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BLOCK RESETPATHS;
BLOCK ASYNCPATHS;
LOCATE COMP "CLK" SITE "G2";
IOBUF PORT "CLK" PULLMODE=NONE IO_TYPE=LVCMOS33;
FREQUENCY PORT "CLK" 150 MHZ;
SYSCONFIG CONFIG_IOVOLTAGE=3.3 COMPRESS_CONFIG=ON MCCLK_FREQ=62 SLAVE_SPI_PORT=DISABLE MASTER_SPI_PORT=ENABLE SLAVE_PARALLEL_PORT=DISABLE;
LOCATE COMP "tx_out" SITE "L4"; # FPGA transmits to ftdi
LOCATE COMP "rx_in" SITE "M1"; # FPGA receives from ftdi
IOBUF PORT "tx_out" PULLMODE=UP IO_TYPE=LVCMOS33 DRIVE=4;
IOBUF PORT "rx_in" PULLMODE=UP IO_TYPE=LVCMOS33;
LOCATE COMP "leds[7]" SITE "H3";
LOCATE COMP "leds[6]" SITE "E1";
LOCATE COMP "leds[5]" SITE "E2";
LOCATE COMP "leds[4]" SITE "D1";
LOCATE COMP "leds[3]" SITE "D2";
LOCATE COMP "leds[2]" SITE "C1";
LOCATE COMP "leds[1]" SITE "C2";
LOCATE COMP "leds[0]" SITE "B2";
IOBUF PORT "leds[0]" PULLMODE=NONE IO_TYPE=LVCMOS33 DRIVE=4;
IOBUF PORT "leds[1]" PULLMODE=NONE IO_TYPE=LVCMOS33 DRIVE=4;
IOBUF PORT "leds[2]" PULLMODE=NONE IO_TYPE=LVCMOS33 DRIVE=4;
IOBUF PORT "leds[3]" PULLMODE=NONE IO_TYPE=LVCMOS33 DRIVE=4;
IOBUF PORT "leds[4]" PULLMODE=NONE IO_TYPE=LVCMOS33 DRIVE=4;
IOBUF PORT "leds[5]" PULLMODE=NONE IO_TYPE=LVCMOS33 DRIVE=4;
IOBUF PORT "leds[6]" PULLMODE=NONE IO_TYPE=LVCMOS33 DRIVE=4;
IOBUF PORT "leds[7]" PULLMODE=NONE IO_TYPE=LVCMOS33 DRIVE=4;
LOCATE COMP "RST_N" SITE "B3";
IOBUF PORT "RST_N" PULLMODE=DOWN IO_TYPE=LVCMOS33;