CC2570

CC2571

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SWRS095A

– FEBRUARY 2011 – REVISED MARCH 2011

Table 4. ANT Serial Message Format

Byte

Name

Length

Description

0

SYNC

1

Sync byte = 0xA4

1

LENGTH

1

Number of data bytes in message (n)

2

ID

1

Message identifier

3 to n + 2

DATA1

–DATAn

n

Message data bytes

n + 3

CHECKSUM

1

XOR of all previous bytes.

NOTE

Important: It should be noted that for the asynchronous serial mode, the SYNC byte is

always sent as part of the messages and is always 0xA4. For the synchronous serial

protocol, the SYNC byte is always sent by ANT and is 0xA4 for ANT-to-host transactions

and 0xA5 for host-to ANT-transactions.

For complete details on the ANT/host interface, see the ANT document ANT Message Protocol and Usage.

Table 5 is a list of the command set applicable to the CC257x. The Requested column indicates that the

message must be requested by the host. The Event column indicates that the message is sent by ANT to the

host without any request from the host

—for example, after a channel event. The Reply column indicates that the

command elicits a response from ANT.

Table 5. ANT Serial Messages

Class

Message(1)

ID

Description

Reply

Requested

Event

UNASSIGN_CHANNEL_ID

0x41

Unassign a channel.

Yes

No

No

ASSIGN_CHANNEL_ID

0x42

Assign a channel.

Yes

No

No

CHANNEL_ID_ID

0x51

Set channel ID.

Yes

No

No

CHANNEL_MESG_PERIOD_ID

0x43

Set channel period.

Yes

No

No

CHANNEL_SEARCH_TIMEOUT_

Set the channel-search time-out

0x44

Yes

No

No

ID

period.

CHANNEL_RADIO_FREQ_ID

0x45

Set the channel RF frequency.

Yes

No

No

NETWORK_KEY_ID

0x46

Set the network key.

Yes

No

No

Config

RADIO_TX_POWER_ID

0x47

Set the transmit power (all channels)

Yes

No

No

messages

ID_LIST_ADD_ID

0x59

Add channel ID to search list.

Yes

No

No

ID_LIST_CONFIG_ID

0x5A

Configure search list.

Yes

No

No

CHANNEL_RADIO_TX_POWER_

0x60

Set the channel transmit power.

Yes

No

No

ID

SET_LP_SEARCH_TIMEOUT_ID

0x60

Set the low-priority search time-out.

Yes

No

No

RX_EXT_MESGS_ENABLE_ID

0x66

Enable extended messages.

Yes

No

No

AUTO_FREQ_CONFIG_ID

0x70

Configure frequency agility feature.

Yes

No

No

PROX_SEARCH_CONFIG_ID

0x71

Set proximity search.

Yes

No

No

Notification

STARTUP_MESG_ID

0x6F

Startup message (following reset).

No

No

Yes

SYSTEM_RESET_ID

0x4A

Reset system.

No

No

No

OPEN_CHANNEL_ID

0x4B

Open a channel.

Yes

No

No

Control

CLOSE_CHANNEL_ID

0x4C

Close a channel.

Yes

No

No

OPEN_RX_SCAN_ID

0x5B

Open channel in scan mode.

Yes

No

No

REQUEST_ID

0x4D

Request a message from ANT.

–

No

No

Broadcast message (ANT

→host and

BROADCAST_DATA_ID

0x4E

No

No

Yes

host

→ANT).

Data

Acknowledged message (ANT

→host

ACKNOWLEDGED_DATA_ID

0x4F

No

No

Yes

messages

and host

→ANT).

Burst message (ANT

→host and

BURST_DATA_ID

0x50

No

No

Yes

host

→ANT).

Event

RESPONSE_EVENT_ID

0x40

Channel event message.

–

No

Yes

(1)

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© 2011, Texas Instruments Incorporated

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