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7.2.2

Policy settings

There are some situations when the SN260 must make a decision but there isn’t enough

time to consult with the Host. The Host can control what decision is made by setting the

policy in advance. The SN260 will then make decisions according to the current policy. The

Host is informed via callbacks each time a decision is made, but by the time the news

reaches the Host, it is too late to change that decision. You can change the policies at any

time by using the setPolicy command.

A policy is used for trust center behavior, external binding modification requests, datagram

replies, generating pollHandler callbacks, and the contents of the unicastSent and

messageSent

callbacks.

7.2.3

Datagram replies

The policy for datagram replies allows the Host to decide whether it wants to supply the

SN260 with a reply payload for every datagram received. If the Host sets the policy to not

supply a reply, the SN260 will automatically send an empty reply (containing no payload) for

every datagram received. If the Host sets the policy to supply the reply, then the SN260 will

only send a reply when instructed by the Host.

If the reply does not reach the sender before the transport retry timeout expires, the sender

will transmit the datagram again. The Host must process the incoming message and supply

the reply quickly enough to avoid retransmission by the sender. Provided this timing

constraint is met, multiple datagrams can be received before the first reply is supplied and

the replies can be supplied in any order.

7.2.4

Callbacks

Asynchronous callbacks from the SN260 are sent to the Host as the response to a

callback

command. The SN260 uses the interrupt line to indicate that the Host should

send a callback command. The SN260 will queue multiple callbacks while it waits for the

Host, and each response only delivers one callback. If the SN260 receives the callback

command when there are no pending callbacks, it will reply with the noCallbacks

response.

EZSP_CONFIG_RESERVED_

ROUTING_ENTRIES

(C)

entries

The number of route table entries that are

reserved for temporary aggregation routes in

the mesh stack.

EZSP_CONFIG_MOBILE_NODE_

POLL_TIMEOUT

020

quarter

seconds

The maximum amount of time that a mobile

node can wait between polls. If no poll is heard

within this timeout, then the parent removes

the mobile node from its tables.

EZSP_CONFIG_RESERVED_

MOBILE_CHILD_ENTRIES

(E)

entries

The number of child table entries reserved for

use only by mobile nodes.

EZSP_CONFIG_HOST_RAM

255

bytes

The amount of RAM available for use by the

Host.

EZSP_CONFIG_TX_POWER_MODE

Enables boost power mode and/or the

alternate transmitter output.

Table 17.

Configuration values (continued)

Value

Min.

Def.

Max.

Units

RAM

Cost

Description

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