axi4lite_HighResolutionClock

Based on axi4lite_Register, IP/clock_highresolution

Instantiation

Todo

needs documentation

HRC : entity PoC.axi4lite_HighResolutionClock
generic map (
   CLOCK_FREQUENCY => 100 MHz
) port map (
  Clock        => Clock,
  Reset        => Reset,
  Nanoseconds  => Nanoseconds,
  Datetime     => Datetime,

  AXI_clock    => AXI_clock,
  AXI_reset    => AXI_reset,
  AXI4Lite_m2s => AXI4Lite_m2s,
  AXI4Lite_s2m => AXI4Lite_s2m
);

Interface

Generics

CLOCK_FREQUENCY

Name:

CLOCK_FREQUENCY

Type:

FREQ

Default Value:

— — — —

Description:

Frequency of input clock signal used by internal time counters.

USE_CDC

Name:

USE_CDC

Type:

boolean

Default Value:

False

Description:

Enable/disable CDC FIFO.

REGISTER_NANOSECONDS

Name:

REGISTER_NANOSECONDS

Type:

natural

Default Value:

0

Description:

Amount of pipelining stages.

SECOND_RESOLUTION

Name:

SECOND_RESOLUTION

Type:

T_SECOND_RESOLUTION

Default Value:

NANOSECONDS

Description:

Set unit for Time_sec_res register (NANOSECONDS, MICROSECONDS or MILLISECONDS).

Ports

Clock

Name:

Clock

Type:

std_logic

Mode:

in

Default Value:

— — — —

Description:

Clock

Reset

Name:

Reset

Type:

std_logic

Mode:

in

Default Value:

— — — —

Description:

synchronous high-active reset

Nanoseconds

Name:

Nanoseconds

Type:

unsigned(63 downto 0)

Mode:

out

Default Value:

— — — —

Description:

Current time in nanoseconds.

Datetime

Name:

Datetime

Type:

T_CLOCK_DATETIME

Mode:

out

Default Value:

— — — —

Description:

Curent time in datetime.

AXI_clock

Name:

AXI_clock

Type:

std_logic

Mode:

in

Default Value:

— — — —

Description:

AXI clock.

AXI_reset

Name:

AXI_reset

Type:

std_logic

Mode:

in

Default Value:

— — — —

Description:

AXI reset.

AXI4Lite_m2s

Name:

AXI4Lite_m2s

Type:

axi4lite.T_AXI4Lite_Bus_m2s

Mode:

in

Default Value:

— — — —

Description:

AXI4-Lite manager to subordinate signals.

AXI4Lite_s2m

Name:

AXI4Lite_s2m

Type:

axi4lite.T_AXI4Lite_Bus_s2m

Mode:

out

Default Value:

— — — —

Description:

AXI4-Lite subordinate to manager signals.

Configuration

Todo

tbd

Register Map

Offset

R/W Config

Name

Description

0x0000

—

Reserved

Dummy register for later use

0x0004

ReadWrite

Config_reg

Configuration register for correction counter:
Config_reg[31]: enable
Config_reg[30]: increment
Config_reg[29..0]: correction_threshold

0x0008

ReadOnly

Nanoseconds_lower

Current time in nanoseconds (lower 32-bit)

0x000C

ReadOnly

Nanoseconds_upper

Current time in nanoseconds (upper 32-bit)

0x0010

ReadOnly

Time_HMS

current time:
Time_HMS(31..17): reserved
Time_HMS(16..12): hours
Time_HMS(11..6): minutes
Time_HMS(5..0): seconds

0x0014

ReadOnly

Date_Ymd

current date:
Date_Ymd(31..22): reserved
Date_Ymd(21..9): year
Date_Ymd(8..5): month
Date_Ymd(4..0): day

0x0018

ReadOnly

Time_sec_res

Counter in ms, us or ns (specified by user with a generic)

0x001C

—

Reserved

Reserved

0x0020

ReadWrite_NotRegistered

Nanoseconds_to_load_lower

Nanoseconds to load (lower 32-bit)

0x0024

ReadWrite_NotRegistered

Nanoseconds_to_load_uppper

Nanoseconds to load (upper 32-bit)

0x0028

ReadWrite_NotRegistered

Datetime_to_load_HMS

Time to load (as described for Time_HMS)

0x002C

ReadWrite_NotRegistered

Datetime_to_load_Ymd

Date to load (as described for Date_Ymd)