Entity: usb_fs_nb_out_pe

• File: usb_fs_nb_out_pe.sv

Diagram

Description

Generics

Generic name	Type	Value	Description
NumOutEps	logic [4:0]	2
MaxOutPktSizeByte	int unsigned	32
OutEpW	int unsigned	$clog2(NumOutEps)	derived parameter
PktW	int unsigned	$clog2(MaxOutPktSizeByte)	derived parameter

Ports

Port name	Direction	Type	Description
clk_48mhz_i	input
rst_ni	input
link_reset_i	input
dev_addr_i	input	[6:0]
out_ep_current_o	output	[3:0]	Other signals address to this ep,
out_ep_data_put_o	output		put the data (put addr advances after)
out_ep_put_addr_o	output	[PktW - 1:0]	Offset to put data (0..pktlen)
out_ep_data_o	output	[7:0]
out_ep_newpkt_o	output		new packed, current was set
out_ep_acked_o	output		good termination, device has acked
out_ep_rollback_o	output		bad termination, discard data
out_ep_setup_o	output	[NumOutEps-1:0]
out_ep_full_i	input	[NumOutEps-1:0]	Cannot accept data
out_ep_stall_i	input	[NumOutEps-1:0]	Stalled
out_ep_iso_i	input	[NumOutEps-1:0]	Configure endpoint in isochronous mode
data_toggle_clear_i	input	[NumOutEps-1:0]	Clear the data toggles for an EP
rx_pkt_start_i	input		/////////// rx path // /////////// Strobed on reception of packet.
rx_pkt_end_i	input
rx_pkt_valid_i	input
rx_pid_i	input	[3:0]	Most recent packet received.
rx_addr_i	input	[6:0]
rx_endp_i	input	[3:0]
rx_data_put_i	input		rx_data is pushed into endpoint controller.
rx_data_i	input	[7:0]
tx_pkt_start_o	output		/////////// tx path // /////////// Strobe to send new packet.
tx_pkt_end_i	input
tx_pid_o	output	[3:0]

Signals

Name	Type	Description
unused_1	logic	suppress warnings
out_xfr_state	state_out_e
out_xfr_state_next	state_out_e
out_xfr_start	logic
new_pkt_end	logic
rollback_data	logic
nak_out_transfer	logic	set when the endpoint buffer is unable to receive the out transfer
data_toggle_q	logic [NumOutEps - 1:0]	data toggle state
data_toggle_d	logic [NumOutEps - 1:0]	data toggle state
token_received	logic	Decode the rx token
out_token_received	logic	Decode the rx token
setup_token_received	logic	Decode the rx token
invalid_packet_received	logic
data_packet_received	logic
non_data_packet_received	logic
bad_data_toggle	logic
ep_impl_d	logic
ep_impl_q	logic
out_ep_current_d	logic [3:0]
current_xfer_setup_q	logic	1: If the current transfer is a SETUP, 0: OUT
rx_pid_type	usb_pid_type_e	More syntax so can compare with enum
rx_pid	usb_pid_e
out_ep_index	logic [OutEpW-1:0]	Make widths work - out_ep_current_d/out_ep_current_o only hold implemented endpoint IDs. These signals can be used to index signals of NumOutEps width. They are only valid if ep_impl_d/q are set, i.e., if the specified endpoint is implemented.
out_ep_index_d	logic [OutEpW-1:0]
increment_addr	logic	address increment whenever there is a data put unless -- already going to NAK transaction and replay things -- the address is at max packet size NOTE if more than max packet size received then data is lost

Constants

Name	Type	Value	Description
OutEpW	int unsigned	$clog2(NumOutEps)	derived parameter
PktW	int unsigned	$clog2(MaxOutPktSizeByte)	derived parameter

Types

Name	Type	Description
state_out_e	enum logic [2:0] { StIdle, StRcvdOut, StRcvdDataStart, StRcvdDataEnd, StRcvdIsoDataEnd }

Processes

• unnamed: ( @(posedge clk_48mhz_i or negedge rst_ni) )

• unnamed: ( @(posedge clk_48mhz_i or negedge rst_ni) )

• unnamed: ( )

• unnamed: ( @(posedge clk_48mhz_i or negedge rst_ni) )

• proc_data_toggle_d: ( )

• unnamed: ( @(posedge clk_48mhz_i or negedge rst_ni) )

• unnamed: ( @(posedge clk_48mhz_i or negedge rst_ni) )

• unnamed: ( @(posedge clk_48mhz_i or negedge rst_ni) )

• unnamed: ( @(posedge clk_48mhz_i or negedge rst_ni) )

• unnamed: ( @(posedge clk_48mhz_i or negedge rst_ni) )