xiretza/splink
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Use wishbone interface for CPU port

Browse source
This commit is contained in:
Xiretza 2022-06-30 18:20:36 +02:00
parent 99e52e611e
commit bbb3ec5d30
2 changed files with 40 additions and 47 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

47
gen_liteeth.py
View file

@ -43,6 +43,9 @@ _io = [
# IP/MAC Address.
("ip_address", 0, Pins(32)),
# Interrupt
("interrupt", 0, Pins(1)),
# MII PHY Pads
("mii_eth_clocks", 0,
Subsignal("tx", Pins(1)),
@ -180,40 +183,26 @@ class UDPCore(PHYCore):
clk_freq=CLK_FREQ,
dw=8,
with_sys_datapath=False,
hybrid=True,
)
# DHCP port
data_width = 32
# CPU port
nrxslots = self.core.mac.rx_slots.constant
ntxslots = self.core.mac.tx_slots.constant
platform.add_extension(get_udp_streamer_port_ios(
"dhcp",
data_width=data_width,
))
dhcp_ios = platform.request("dhcp")
wb_bus = wishbone.Interface()
platform.add_extension(wb_bus.get_ios("wishbone"))
self.comb += wb_bus.connect_to_pads(self.platform.request("wishbone"), mode="slave")
self.add_wb_master(wb_bus)
dhcp_streamer = LiteEthUDPStreamer(
self.core.udp,
ip_address=dhcp_ios.ip_address,
udp_port=67,
data_width=data_width,
tx_fifo_depth=64,
rx_fifo_depth=64
ethmac_region_size = (nrxslots + ntxslots)*buffer_depth
ethmac_region = SoCRegion(
origin=self.mem_map.get("ethmac", None),
size=ethmac_region_size,
cached=False
)
self.submodules += dhcp_streamer
self.comb += [
# Connect UDP Sink IOs to UDP Steamer.
dhcp_streamer.sink.valid.eq(dhcp_ios.sink_valid),
dhcp_streamer.sink.last.eq(dhcp_ios.sink_last),
dhcp_ios.sink_ready.eq(dhcp_streamer.sink.ready),
dhcp_streamer.sink.data.eq(dhcp_ios.sink_data),
# Connect UDP Streamer to UDP Source IOs.
dhcp_ios.source_valid.eq(dhcp_streamer.source.valid),
dhcp_ios.source_last.eq(dhcp_streamer.source.last),
dhcp_streamer.source.ready.eq(dhcp_ios.source_ready),
dhcp_ios.source_data.eq(dhcp_streamer.source.data),
]
self.bus.add_slave(name="ethmac", slave=self.core.mac.bus, region=ethmac_region)
self.comb += self.platform.request("interrupt").eq(self.core.mac.ev.irq)
# Pixel port
data_width = 32

40
vhdl/arty_a7.vhdl
View file

@ -87,18 +87,19 @@ architecture a of arty_a7 is
ip_address : in std_logic_vector(31 downto 0);
--== DHCP PORT ==--
dhcp_ip_address : in std_logic_vector(31 downto 0);
dhcp_sink_valid : in std_logic;
dhcp_sink_last : in std_logic;
dhcp_sink_ready : out std_logic;
dhcp_sink_data : in std_logic_vector(31 downto 0);
dhcp_source_valid : out std_logic;
dhcp_source_last : out std_logic;
dhcp_source_ready : in std_logic;
dhcp_source_data : out std_logic_vector(31 downto 0);
--== WISHBONE PORT ==--
wishbone_adr : in std_logic_vector(29 downto 0);
wishbone_dat_w : in std_logic_vector(31 downto 0);
wishbone_dat_r : out std_logic_vector(31 downto 0);
wishbone_sel : in std_logic_vector(3 downto 0);
wishbone_cyc : in std_logic;
wishbone_stb : in std_logic;
wishbone_ack : out std_logic;
wishbone_we : in std_logic;
wishbone_cti : in std_logic_vector(2 downto 0);
wishbone_bte : in std_logic_vector(1 downto 0);
wishbone_err : out std_logic;
interrupt : out std_logic;
--== PIXEL DATA PORT ==--
pixel_bind_port : in std_logic_vector(15 downto 0);
@ -247,12 +248,15 @@ begin
ip_address => x"0a141e28", -- 10.20.30.40
dhcp_ip_address => x"0a141e29", -- 10.20.30.41
dhcp_sink_valid => '0',
dhcp_sink_last => '1',
dhcp_sink_data => x"cafebebe",
dhcp_source_ready => '1',
--== WISHBONE PORT ==--
wishbone_adr => (others => '1'),
wishbone_dat_w => (others => '1'),
wishbone_sel => (others => '1'),
wishbone_cyc => '1',
wishbone_stb => '1',
wishbone_we => '1',
wishbone_cti => (others => '1'),
wishbone_bte => (others => '1'),
--== PIXEL DATA PORT ==--
pixel_bind_port => x"effd", -- port 61437 - "PIXEL"