Rainbow Electronics GC864-PY - Manual (Page 36)

Telit GE864 and GC864 Product Description
80273ST10008a Rev. 14 - 18/09/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 36 of 62
• The MDM interface is the most important one. It allows Python script to send AT commands,
receive responses and unsolicited indications, send data to the network and receive data from
the network during connections. It is quite the same as the usual serial port interface in the
Telit module . The difference is that this interface is not a real serial port but just an internal
software bridge between Python and mobile internal AT command handling engine. All AT
commands working in the
Telit module are working in this software interface as well. Some of
them have no meaning on this interface, such as those regarding serial port settings. The usual
concept of flow control keeps its meaning over this interface, but it's managed internally.
• The MDM2 interface is the second interface between Python and mobile internal AT
command handling. It is used to send AT commands from Python script to mobile and receive
AT responses from mobile to Python script when the classic MDM built-in module already in
use.
• The SER interface allows Python script to read from and write to the real, physical serial port
where usually the AT command interface resides, for example to read NMEA information from
a GPS device. When Python is running this serial port is free to be used by Python script
because it is not used as AT command interface since the AT parser is mapped into the
internal virtual serial port. No flow control is available from Python on this port.
• The SER2 interface allows Python script to read from and write to the real physical serial port
ASC1, that is usually available for trace and debug.
• The GPIO interface allows Python script to handle general purpose input output faster than
through AT commands, skipping the command parser and going directly to control the pins.
• The MOD interface is a collection of useful functions.
• The IIC interface is an implementation on the Python core of the IIC bus Master. It allows
Python to create one or more IIC bus on the available GPIO pins.
• The SPI interface is an implementation on the Python core of the SPI bus Master. It allows
Python to create one or more SPI bus on the available GPIO pins.
For the debug, the print command is directly forwarded on the EMMI TX pin (second serial port) at
baud rate115200bps 8N1.
4.5.4 Python core supported features
The Python core version is 1.5.2+ (string methods added to 1.5.2).
You can use all Python statements and almost all Python built-in types and functions.
.
Built-in types and functions not
supported
Available modules
(all others are not supported)
complex marshal
float imp
long _main_
docstring _builtin_
sys
md5