Entity: usb_serial_ctrl_ep

• File: usb_serial_ctrl_ep.sv

Diagram

Description

Generics

Generic name	Type	Value	Description
MaxPktSizeByte	int unsigned	32
PktW	int unsigned	$clog2(MaxPktSizeByte)	Derived parameters

Ports

Port name	Direction	Type	Description
clk_i	input
rst_ni	input
dev_addr	output	[6:0]
out_ep_data_put_i	input		////////////////////////// out endpoint interface // //////////////////////////
out_ep_put_addr_i	input	[PktW - 1:0]
out_ep_data_i	input	[7:0]
out_ep_acked_i	input
out_ep_rollback_i	input
out_ep_setup_i	input
out_ep_full_o	output
out_ep_stall_o	output
in_ep_rollback_i	input		///////////////////////// in endpoint interface // /////////////////////////
in_ep_acked_i	input
in_ep_get_addr_i	input	[PktW - 1:0]
in_ep_data_get_i	input
in_ep_stall_o	output
in_ep_has_data_o	output
in_ep_data_o	output	[7:0]
in_ep_data_done_o	output

Signals

Name	Type	Description
unused_1	logic	suppress errors
unused_2	logic [PktW-1:0]
ctrl_xfr_state	state_ctrl_xfr_e
ctrl_xfr_state_next	state_ctrl_xfr_e
setup_stage_end	logic
status_stage_end	logic
send_zero_length_data_pkt	logic
dev_addr_int	logic [6:0]	the default control endpoint gets assigned the device address
new_dev_addr	logic [6:0]
pkt_start	logic	keep track of new out data start and end
pkt_end	logic
bmRequestType	logic [7:0]	need to record the 8 bytes of setup data
raw_setup_data	logic [7:0]	need to record the 8 bytes of setup data
bRequest	usb_setup_request_e	Alias for the setup bytes using names from USB spec
wValue	logic [15:0]
wLength	logic [15:0]
wIndex	logic [15:0]
setup_pkt_start	logic
has_data_stage	logic
out_data_stage	logic
in_data_stage	logic
bytes_sent	logic [7:0]
rom_length	logic [6:0]
all_data_sent	logic
more_data_to_send	logic
in_data_transfer_done	logic
rom_addr	logic [6:0]
save_dev_addr	logic
unused_bmR	logic [6:0]	suppress warning
unused_wValue	logic
unused_wIndex	logic [15:0]
dscr_type	usb_dscr_type_e	Send setup data (which will be empty in case of a SET operation and come from the ROM in the case of a GET)

Constants

Name	Type	Value	Description
PktW	int unsigned	$clog2(MaxPktSizeByte)	Derived parameters

Types

Name	Type	Description
state_ctrl_xfr_e	enum logic [2:0] { StIdle = 3'h0, StSetup = 3'h1, StDataIn = 3'h2, StDataOut = 3'h3, StStatusIn = 3'h4, StStatusOut = 3'h5 }	State machine for control transfers

Processes

• unnamed: ( )

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

• unnamed: ( @(posedge clk_i) )

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

• unnamed: ( )

Instantiations

• detect_in_data_transfer_done: rising_edge_detector