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uartat, le910: initial implementation.

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uartat is the underlying UART driver, specifically for use with
AT-style command driven devices like modems.

The le910 support is provided in the form of examples that make use
of the uartat driver to interact with the device.

Signed-off-by: Jon Trulson <jtrulson@ics.com>
This commit is contained in:
Jon Trulson
2017-01-17 11:37:14 -07:00
parent 123e611f45
commit e8151640a1
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examples/java/LE910_Example.java Normal file
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/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2017 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
import upm_uartat.UARTAT;
public class LE910_Example
{
private static String defaultDev = "/dev/ttyUSB0";
static private final int bufferLength = 256;
public static void main(String[] args) throws InterruptedException
{
// ! [Interesting]
if (args.length > 0)
defaultDev = args[0];
System.out.println("Using device " + defaultDev);
System.out.println("Initializing...");
// Instantiate a UARTAT sensor on defaultDev at 115200 baud.
UARTAT sensor = new UARTAT(defaultDev, 115200);
// This is a simplistic example that tries to configure the LE910,
// and use it's built-in socket capabilities to connect to a
// remote host, obtain a small piece of data, and return it. It's
// mainly intended to show you how you can use the various AT
// commands supported by the LE910 to perform simple tasks.
//
// You must have a valid SIM card with an active data plan for
// this example to do anything interesting.
//
// See the LE910 AT Commands reference for full information on
// what is possible with this device. The uartat driver is
// intended to make it a little easier to control AT-style
// devices, but is by no means a full-featured communication
// infrastructure. A "real" application will probably need to be
// much more sophisticated with regard to parsing, doing retries,
// etc.
//
// For experimenting with various AT commands, try using an
// interactive terminal emulator like minicom or screen.
// make sure we are in command mode
if (!sensor.inCommandMode())
{
System.out.println("Not in command mode, switching...");
sensor.commandMode("+++", 1000);
}
// flter out CR's in responses by default
sensor.filterCR(true);
System.out.println("Configuring modem...");
// discard any waiting characters
sensor.drain();
// reset modem
sensor.command("ATZ\r");
// turn off command echo, set verbosity to 1, enable data
// connection mode
sensor.command("ATE0 V1 +FCLASS=0\r");
sensor.drain();
// Now issue some commands and output the results.
System.out.println("Modem and SIM information:");
String buffer;
buffer = sensor.commandWithResponse("AT+ICCID\r", bufferLength);
if (buffer.length() > 0)
{
System.out.println("ICCID (SIM ID): " + buffer);
}
buffer = sensor.commandWithResponse("AT+CGSN=1\r", bufferLength);
if (buffer.length() > 0)
{
System.out.println("IMEI: " + buffer);
}
// see if we are on the network....
buffer = sensor.commandWithResponse("AT+CREG?\r", bufferLength);
if (buffer.length() > 0)
{
System.out.println(buffer);
// look for "CGREG: 0,1" or "CGREG: 0,5"
if (sensor.find(buffer, "CREG: 0,1") ||
sensor.find(buffer, "CREG: 0,5"))
{
System.out.println("Connected to the cell data network.");
// wait up to 5 seconds for responses now...
sensor.setResponseWaitTime(5000);
// setup PDP context (socket 1). An ERROR repsonse is
// possible if the PDP context is already set up.
sensor.command("AT#SGACT=1,1\r");
// setup a TCP socket to nist.gov and read the timestamp.
System.out.println("Connecting to time-a.nist.gov, TCP port 13");
// Wait up to 60 seconds to find the NO CARRIER
// string, which will be present at the end, if the
// connection succeeded and the requested data was
// obtained.
buffer =
sensor.commandWaitFor("AT#SD=1,0,13,\"time-a.nist.gov\"\r",
bufferLength, "\nNO CARRIER\n", 60000);
if (buffer.length() > 0)
{
// print out the response
System.out.println("RESPONSE: ");
System.out.println(buffer);
}
else
{
System.out.println("No response.");
}
// destroy PDP context
sensor.setResponseWaitTime(250);
sensor.command("AT#SGACT=1,0\r");
}
else
{
System.out.println("You do not appear to be connected to the network...");
}
}
else
{
System.out.println("Error executing query\n");
}
// reset the modem
sensor.command("ATZ\r");
System.out.println("Exiting");
// ! [Interesting]
}
}