ZAURA Datasheet, PDF (24/99 Pages) –

ZAURA RF Wireless Library
Programmer’s Reference Manual
12
Table 3. Service Access Point Labels and Functions (Continued)
SAP
14
15
Label
SAP_UART_0
SAP_CMD_INTRPTR
Function
UART_0 Output.
Command Interpreter Input.
The application can use the SAP field as a simple means to segregate data
streams without having to use any byte(s) from the payload. It is up to the
application to implement SAP handling for receiving and transmitting
SAP_APP packets. The use of the SAP field is optional; therefore, this
field is safe to ignore for receiving and transmitting data.
The ZAURA RF Wireless Library defines two SAP values that applica-
tions may target when sending data: SAP_UART_0 and
SAP_CMD_INTRPTR. Data sent to SAP_UART_0 will be bridged to
UART_0 on the target device(s). The data field received is not interpreted
by the receiving ZAURA RF Wireless Module prior to transmission on
UART_0.
Data sent to the SAP_CMD_INTRPTR must be ASCII text that contains
a valid console command. The string is not required to be NULL termi-
nated. Upon receipt of the ASCII string, the remote ZAURA RF Wireless
Module will process the command and send any output to
ZAURA_RF_RemoteConsoleSap (a user-configurable parameter default-
ing to SAP_UART_0) of the node that issued the remote console com-
mand.
Channel Access Rules
The ZAURA RF Wireless Library can optionally be configured to per-
form a carrier sense prior to transmitting a DATA or SDATA frame to help
prevent (but not eliminate) the possibility that one node initiates a trans-
mit operation while another node is already transmitting. If more than one
The ZAURA RF Wireless Library
RM006003-1011