Laird AC4868, Руководство пользователя

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AC4868 868 MHz Transceiver
User’s Manual
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On-the-Fly Control Commands
The AC4868-250 transceiver contains static memory that holds many of the parameters that control the
transceiver operation. Using the “CC” command set allows many of these parameters to be changed during
system operation. Because the memory these commands affect is static, when the transceiver is reset, these
parameters will revert back to the settings stored in the EEPROM. While in CC Command mode using pin 17
(Command/Data), the RF interface of the transceiver is still active. Therefore, it can receive packets from
remote transceivers while in CC Command mode and forward these to the OEM Host.
While in CC Command mode using AT Commands, the RF interface of the transceiver is active, but packets
sent from other transceivers will not be received. The transceiver uses Interface Timeout/RF Packet Size to
determine when a CC Command is complete. Therefore, there should be no delay between each character as
it is sent from the OEM Host to the transceiver or the transceiver will not recognize the command. If the OEM
Host has sent a CC Command to the transceiver and an RF packet is received by the transceiver, the
transceiver will send the CC Command response to the OEM Host before sending the packet. However, if an
RF packet is received before the Interface Timeout expires on a CC Command, the transceiver will send the
packet to the OEM Host before sending the CC Command response.
When an invalid command is sent, the radio scans the command to see if it has a valid command followed by
bytes not associated with the command, in which case the radio discards the invalid bytes and accepts the
command. In all other cases, the radio returns the first byte of the invalid command back to the user and
discards the rest.
Command Name Command (All bytes in Hex) Return (All bytes in hex)
Enter AT Command
Mode 0x41 0x54 0x2B 0x2B 0x2B 0x0D 0xCC 0x43 0x4F 0x4D
Exit AT Command
Mode 0xCC 0x41 0x54 0x4F 0x0D - 0xCC 0x44 0x41 0x54
Status Request 0xCC 0x00 0x00 - - - 0xCC Firmware
Version 0x00: Server
0x01: Client in Range
0x03: Client out of range
Change Server / Client 0xCC 0x03 0x00: Server
0x03: Client
- - 0xCC Firmware
Version 0x00: Server
0x03: Client
Sleep Walk Power
Down 0xCC 0x06 - - - - 0xCC Channel - -
Sleep Walk Wake Up 0xCC 0x07 - - - - 0xCC Channel - -
Broadcast Packets 0xCC 0x08 0x00: Broadcast
0x01: Addressed
- 0xCC 0x00 or
0x01 - -
Write Destination
Address 0xCC 0x10 Byte 4 of dest. MAC Byte 5 Byte 6 0xCC Byte 4 of
Dest. MAC Byte 5 Byte 6
Read Destination
Address 0xCC 0x11 - - - - 0xCC Byte 4 of
Dest. MAC Byte 5 Byte 6
Auto Destination 0xCC 0x15 Bit 0: Auto Destination
Bit 4: Enable Auto Destination
0xCC Bit 0: Auto Destination
Bits 1-7: 0
Read Digital Inputs 0xCC 0x20 - - - - 0xCC Bit 0: GO0
Bit 1: GI1
- -
Read ADC 0xCC 0x21 0x01: AD in
0x02: Temp
- - 0xCC MSB of 10
bit ADC LSB of 10 bit ADC
Write Digital Outputs 0xCC 0x23 Bit 0: GO0 - - 0xCC Bit 0: GO0 - -