The WDCInterface is is a drop-in replacement for an EthernetInterface class that allows the user to connect to the Internet with a Wistron NeWeb Corporation (WNC) M14A2A Series data module using the standard network Socket API's. This interface class is used in the AT&T Cellular IoT Starter Kit which is sold by Avnet (http://cloudconnectkits.org/product/att-cellular-iot-starter-kit).
Dependencies: WncControllerK64F
Dependents: WNCProximityMqtt Pubnub_ATT_IoT_SK_WNC_sync BluemixDemo BluemixQS ... more
See the WNCInterface README in the Wiki tab for detailed information on this library.
Socket/WncUDPSocket.cpp
- Committer:
- JMF
- Date:
- 2017-03-24
- Revision:
- 29:b278b745fb4f
- Parent:
- 28:dceb8da78e6d
File content as of revision 29:b278b745fb4f:
/* ===================================================================== Copyright © 2016, Avnet (R) Contributors: * James M Flynn, www.em.avnet.com Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. @file WNCInterface.cpp @version 1.0 @date Sept 2016 ======================================================================== */ #include "../WNCInterface.h" #include "WncUDPSocket.h" #include <cstring> WncUDPSocket::WncUDPSocket() : _is_blocking(0), _btimeout(0){ } WncUDPSocket::~WncUDPSocket() { } int WncUDPSocket::init(void) { _is_blocking = false; // start out not blocking, user will set it if desired return ( WNCInterface::_pwnc->getWncStatus() == WNC_GOOD )? 0:-1; } int WncUDPSocket::close(void) { WncSocket::disconnect(); return ( WNCInterface::_pwnc->getWncStatus() == WNC_GOOD )? 0:-1; } // -1 if unsuccessful, else number of bytes written int WncUDPSocket::sendTo(WncEndpoint &remote, char *packet, int length) { int ret = -1; CHK_WNCFE(( WNCInterface::_pwnc->getWncStatus() == FATAL_FLAG ), fail); if( remote._epAddr.port ) { //make sure the Endpoint has an port assoicated with it if( WncSocket::connect(remote._epAddr.IP,SOCK_DGRAM,remote._epAddr.port) ) { if( WNCInterface::_pwnc->write(0,(const uint8_t*)packet,length) ) ret = length; close(); } } return ret; } // // blocking is used to make the WNC keep checking for incoming data for a // period of time. void WncUDPSocket::set_blocking (bool blocking, unsigned int timeout) { _is_blocking = blocking; // true or false _btimeout = timeout; // user specifies in msec CHK_WNCFE(( WNCInterface::_pwnc->getWncStatus() == FATAL_FLAG ), void); WNCInterface::_pwnc->setReadRetryWait(0, 0); WNCInterface::_pwnc->setReadRetries(0, 0); } // -1 if unsuccessful, else number of bytes received int WncUDPSocket::receiveFrom(WncEndpoint &remote, char *buffer, int length) { const uint8_t *ptr; Timer t; int done, ret = -1; //make sure the Endpoint has an port assoicated with it if( !remote._epAddr.port ) return -1; CHK_WNCFE(( WNCInterface::_pwnc->getWncStatus() == FATAL_FLAG ), fail); ret = WncSocket::connect(remote._epAddr.IP,SOCK_DGRAM,remote._epAddr.port); t.start(); do { ret = WNCInterface::_pwnc->read(0, &ptr); done = ret | (t.read_ms() > _btimeout); } while( _is_blocking && !done ); t.stop(); if( ret > length ) ret = length; memcpy( buffer, ptr, ret ); return ret; }