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Texas Instruments TMS320C645X User Manual

Page 189

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SRIO Registers

Table 115. Port Control CSR n (SPn_CTL) Field Descriptions (continued)

Bit

Field

Value

Description

21

INPUT_PORT_E

Input port receive enable

NABLE

0b

Port is stopped and only enabled to route or respond I/O logical MAINTENANCE packets,
depending upon the functionality of the processing element. Other packets generate
packet-not-accepted control symbols to force an error condition to be signaled by the sending
device. Control symbols are not affected and are received and handled normally.

1b

Port is enabled to respond to any packet

20

ERROR_CHECK

This bit disables all RapidIO transmission error checking. Device behavior when error checking and

_DISABLE

recovery is disabled and an error condition occurs is undefined.

0b

Error checking and recovery is enabled

Error checking and recovery is disabled

1b

19

Send incoming Multi cast-event control symbols to this port (multiple port devices only)

MULTICAST_PARTICIPANT

18-4

Reserved

Reserved

3

STOP_PORT_FL

When set, this bit causes the port to set the Port Error bit in the Port n Error and Status CSR and

D_ENC_ENABLE

stop attempting to send packets to the connected device when the Output Failed-encountered bit is
set. Packets are discarded if the Drop Packet Enable bit is set. When cleared, the port continues to
attempt to transmit packets to the connected device if the Output Failed-encountered bit is set.

2

DROP_PACKET_

When set, this bit allows the output port to drop packets that are acknowledged with a

ENABLE

packet-not-accepted control symbol when the error failed threshold is exceeded. If the port "heals",
and the current error rate falls below the failed threshold, the output no longer drops packets
(switch devices only). When cleared, the output port continues to try to transmit packets that have
been rejected due to transmission errors

1

PORT_LOCKOU

Port Lockout: When cleared, this port is enabled to issue any packets. When set, this port is

T

stopped and is not enabled to issue or receive any packets; the input port can still follow the
training procedure and can still send and respond to link-requests; all received packets return
packet-not-accepted control symbols to force an error condition to be signaled by the sending
device.

0

PORT_TYPE

Port type. This indicates the port type, parallel or serial (read only).

0b

Parallel port

1b

Serial port

SPRU976 – March 2006

Serial RapidIO (SRIO)

189

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