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NS16450

Provided by

NS16450

Class Hierarchy

conf-object → log-object → NS16450

Interfaces Implemented

log_object, rs232_device, serial_device, event_poster, io_memory

Ports

Reset (signal)

Description

National Semiconductor's NS16450, a Universal Asynchronous Receiver/Transmitter (UART).

Attributes

Attributes inherited from class conf-object

attributes, classname, component, iface, name, object_id, queue

Attributes inherited from class log-object

access_count, log_buffer, log_buffer_last, log_buffer_size, log_group_mask, log_groups, log_level, log_type_mask

Attribute List

console

Optional attribute; read/write access; type: Object or Nil.

Console or device connected to the serial port.

dl

Optional attribute; read/write access; type: Integer.

Baud rate divisor latches (MSB|LSB).

fcr

Optional attribute; read/write access; type: Integer.

FIFO Control Register.

ier

Optional attribute; read/write access; type: Integer.

Interrupt Enable Register.

iir

Optional attribute; read/write access; type: Integer.

Interrupt Identification Register.

interrupt_mask_out2

Optional attribute; read/write access; type: Integer.

If set to non-zero, then the OUT2 pin is used to mask the output interrupt pin, meaning that no interrupt will be raised unless OUT2 is high.

interrupt_pin

Optional attribute; read/write access; type: Integer.

Interrupt pin status.

interrupt_requests

Optional attribute; read/write access; type: Integer.

Interrupt requests.

irq_dev

Optional attribute; read/write access; type: Object or Nil.

Device that interrupts are sent to.

irq_level

Optional attribute; read/write access; type: Integer.

Interrupt level.

lcr

Optional attribute; read/write access; type: Integer.

Line Control Register (Data Format Register).

link

Optional attribute; read/write access; type: Object or Nil.

Serial link that this device is connected to.

lsr

Optional attribute; read/write access; type: Integer.

Line Status Register (Serialization Status Register).

mcr

Optional attribute; read/write access; type: Integer.

Modem Control Register.

msr

Optional attribute; read/write access; type: Integer.

Modem Status Register.

overrun_debug_level

Optional attribute; read/write access; type: Integer.

Debug level for receive overrun messages.

rbr

Optional attribute; read/write access; type: Integer.

Receiver Buffer Register.

rbr_busy

Optional attribute; read/write access; type: Integer.

Receiver buffer register not read by CPU.

rcvr_fifo

Optional attribute; read/write access; type: [i*].

Contents of the 16 byte deep receive FIFO.

recorder

Required attribute; read/write access; type: Object.

Recorder device for playback of serial traffic.

scr

Optional attribute; read/write access; type: Integer.

Scratch-pad Register.

target_pace_receive

Optional attribute; read/write access; type: Integer.

If this attribute is non-zero (default), no receiver overruns will occur (except for loopback operation). Bytes will be read from the console at the same pace as they are consumed by the target operating system. This means that received bytes must be buffered by the console.

thr

Optional attribute; read/write access; type: Integer.

Transmitter Hold Register.

waiting_for_tx

Optional attribute; read/write access; type: Integer.

Set if the device is waiting to transmit a character, but the destination is blocking.

waiting_for_tx_fifo

Optional attribute; read/write access; type: Integer.

Set if the character blocking is in the fifo.

xmit_fifo

Optional attribute; read/write access; type: [i*].

Contents of the 16 byte deep transmit FIFO.

xmit_time

Optional attribute; read/write access; type: Integer.

Time between character transmits, in ns. Default is 100000.

Command List

Commands defined by interface log_object

log, log-group, log-level, log-size, log-type

Commands

info	print information about the device
status	print status of the device

Command Descriptions

<NS16450>.info

Synopsis

<NS16450>.info

Description

Print detailed information about the configuration of the device.

<NS16450>.status

Synopsis

<NS16450>.status

Description

Print detailed information about the current status of the device.

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