8 at^sspi serial protocol interface, Ac75 at command set – Siemens AC75 User Manual
Page 496
AC75 AT Command Set
19.8 AT^SSPI
s
AC75_ATC_V01.002
Page 496 of 569
10/30/06
Confidential / Released
19.8
AT^SSPI Serial Protocol Interface
The
command enables the module to be connected to external I²C or SPI devices.
The I²C/SPI datastream is mapped through an internal I²C/SPI driver to and from an ASCII hex protocol which
can be exchanged with an internal application (JAVA) or an external application via V24.
The
write command configures and activates the I²C/SPI interface and changes from command mode
into data mode. All values must be given in hexadecimal format (0 - 9, A - F) without "0x". For details on data
mode please refer to Section
Transmitting Data over AT Interface
.
Caution:
I²C and SPI cannot be operated in parallel with USB. The USB interface will be disabled as soon as the I²C or
SPI channel is opened with
. To activate the USB interface again after closing the I²C or SPI channel
it is necessary to restart the AC75 module, either by switching the ignition line or entering the command
=1,1. The Terminal program or host application connected with the USB interface must be closed
before activating the USB.
If I²C or SPI data mode is active the DCD line of the connected serial port goes high.
If I²C or SPI are opened from a Java application be sure to close the I²C or SPI channels before Java terminates.
Syntax
Test Command
AT^SSPI=?
Response(s)
^SSPI:
(list of supported
s), (list of supported
s), (list of supported
s), (list of supported
OK
Read Command
AT^SSPI?
Response(s)
,
OK
ERROR
+CME ERROR: <err>
Write Command
AT^SSPI=
[,
[,
]]]]]
Response(s)
CONNECT
(indicates that ME has entered data mode)
ERROR
+CME ERROR: <err>
Reference(s)
PIN
ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge
4
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