Entity: usb_fs_nb_in_pe

• File: usb_fs_nb_in_pe.sv

Diagram

Description

Generics

Generic name	Type	Value	Description
NumInEps	logic [4:0]	12
MaxInPktSizeByte	int unsigned	32
InEpW	int unsigned	$clog2(NumInEps)	derived parameter
PktW	int unsigned	$clog2(MaxInPktSizeByte)	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]
in_ep_current_o	output	[3:0]	Other signals addressed to this ep
in_ep_rollback_o	output		Bad termination, rollback transaction
in_ep_xfr_end_o	output		good termination, transaction complete
in_ep_get_addr_o	output	[PktW - 1:0]	Offset requested (0..pktlen)
in_ep_data_get_o	output		Accept data (get_addr advances too)
in_ep_newpkt_o	output		New IN packet starting (updates in_ep_current_o)
in_ep_stall_i	input	[NumInEps-1:0]	Endpoint in a stall state
in_ep_has_data_i	input	[NumInEps-1:0]	Endpoint has data to supply
in_ep_data_i	input	[7:0]	Data for current get_addr
in_ep_data_done_i	input	[NumInEps-1:0]	Set when out of data
in_ep_iso_i	input	[NumInEps-1:0]	Configure endpoint in isochronous mode
data_toggle_clear_i	input	[NumInEps-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]
tx_pkt_start_o	output		////////////////// tx path ////////////////// Strobe to send new packet.
tx_pkt_end_i	input
tx_pid_o	output	[3:0]	Packet type to send
tx_data_avail_o	output		Data payload to send if any
tx_data_get_i	input
tx_data_o	output	[7:0]

Signals

Name	Type	Description
unused_1	logic	suppress warnings
unused_2	logic	suppress warnings
in_xfr_state	state_in_e
in_xfr_state_next	state_in_e
in_xfr_end	logic
data_toggle_q	logic [NumInEps-1:0]	data toggle state
data_toggle_d	logic [NumInEps-1:0]	data toggle state
token_received	logic	endpoint data buffer
setup_token_received	logic	endpoint data buffer
in_token_received	logic	endpoint data buffer
ack_received	logic	endpoint data buffer
more_data_to_send	logic
ep_impl_d	logic
ep_impl_q	logic
in_ep_current_d	logic [3:0]
rx_pid_type	usb_pid_type_e	More syntax so can compare with enum
rx_pid	usb_pid_e
in_ep_index	logic [InEpW-1:0]	Make widths work - in_ep_current_d/in_ep_current_o only hold implemented endpoint IDs. These signals can be used to index signals of NumInEps width. They are only valid if ep_impl_d/q are set, i.e., if the specified endpoint is implemented.
in_ep_index_d	logic [InEpW-1:0]
rollback_in_xfr	logic	////////////////////////////////////////////////////////////////////////////// in transfer state machine //////////////////////////////////////////////////////////////////////////////

Constants

Name	Type	Value	Description
InEpW	int unsigned	$clog2(NumInEps)	derived parameter
PktW	int unsigned	$clog2(MaxInPktSizeByte)	derived parameter

Types

Name	Type	Description
state_in_e	enum logic [1:0] { StIdle, StRcvdIn, StSendData, StWaitAck }

Processes

• unnamed: ( )

• 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) )

• proc_data_toggle_d: ( )

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

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