Diff: NetServices/drv/at/ATIf.cpp

Revision:

0:f30e2135b0db

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/NetServices/drv/at/ATIf.cpp	Wed Feb 09 13:57:49 2011 +0000
@@ -0,0 +1,772 @@
+
+/*
+Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
+ 
+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.
+*/
+
+#include "ATIf.h"
+#include "mbed.h"
+#include <cstdarg>
+
+#define READ_TIMEOUT 100
+#define TMP_BUF_SIZE 128//512
+
+#define SERIAL_BUF_LEN 512 //Huge buf needed for PPP (esp. when transferring big data chunks, using TCP)
+
+#define BAUDRATE 9600//9600//115200// 19200
+
+#include "netCfg.h"
+#if NET_GPRS
+
+//#define __DEBUG
+#include "dbg/dbg.h"
+
+ATIf::ATIf() : SerialBuf(SERIAL_BUF_LEN), m_isOpen(false)//, m_signalsEnable(false), m_isOpen(false), m_pCurrentSignal(NULL), m_signals() 
+{
+  DBG("New AT If@%p\n", this);
+
+  m_readTimeout = READ_TIMEOUT; //default 1s
+  //tmpBuf = NULL;
+  m_lineMode = false;
+  m_tmpBuf = new char[TMP_BUF_SIZE];
+}
+
+ATIf::~ATIf()
+{
+  if(m_tmpBuf)
+    delete[] m_tmpBuf;
+}
+
+int ATIf::printf(const char* format, ... )
+{
+
+/*if(!m_tmpBuf)
+    m_tmpBuf = new char[TMP_BUF_SIZE]; //is it really necessary ??*/
+  *m_tmpBuf=0;
+     
+  int len = 0;
+  
+  //
+//  flushBuffer();
+//wait(1);
+  //
+    
+  va_list argp;
+  
+  va_start(argp, format);
+  len += vsprintf(m_tmpBuf, format, argp);
+  va_end(argp);
+  
+  //DBG("\r\nOutBuf is : %s, mode is %d.", m_tmpBuf, m_lineMode);
+  
+  int err = write( m_tmpBuf, m_lineMode );
+  if (err<0)
+    return 0;
+    
+  return len;
+  
+}
+
+int ATIf::scanf(const char* format, ... )
+{
+/*if(!m_tmpBuf)
+    m_tmpBuf = new char[TMP_BUF_SIZE];*/
+  int err = read( m_tmpBuf, TMP_BUF_SIZE - 1,  m_readTimeout, m_lineMode, 1/*Ensure at least one char is read*/ );
+  if (err<0)
+    return -1;//EOF
+    
+  DBG("Scanf'ing:\r\n%s\r\n",m_tmpBuf);
+    
+  int len = 0;
+  
+  if(strchr(format,'%')) //Ugly, determines wether format string is null or not
+  {
+    va_list argp;
+    
+    va_start(argp, format);
+    len += vsscanf(m_tmpBuf, format, argp);
+    va_end(argp);
+  }
+  else //No varargs, call strncmp
+  {
+ /*   if(strlen(m_tmpBuf) == 0 )
+      return -1;*/
+    if( !strncmp(m_tmpBuf, format, strlen(format)) )
+    {
+      return 0;
+    }
+    else
+    {
+      return -1;
+    }
+  }
+  
+  return len;
+  
+}
+
+void ATIf::setTimeout(int timeout) //used by scanf
+{
+  m_readTimeout = timeout;
+}
+
+void ATIf::setLineMode(bool lineMode) //Switch btw line & raw fns
+{
+  m_lineMode = lineMode;
+}
+
+#if 0
+void ATIf::setSignals(bool signalsEnable)
+{
+  m_signalsEnable=signalsEnable;
+}
+#endif
+
+#if 0
+template<class T>
+void ATIf::attachSignal( const char* sigName, T* pItem, bool (T::*pMethod)(ATIf*, bool, bool*) ) //Attach Signal ("Unsollicited response code" in Telit_AT_Reference_Guide.pdf) to an handler fn
+{
+  ATSigHandler sig(sigName, (ATSigHandler::CDummy*)pItem, (bool (ATSigHandler::CDummy::*)(ATIf*, bool, bool*))pMethod);
+  m_signals.push_back(sig);
+}
+#endif
+
+#if 0
+void ATIf::detachSignal( const char* sigName )
+{
+  list<ATSigHandler>::iterator it;
+  
+  for ( it = m_signals.begin(); it != m_signals.end(); it++ )
+  {
+    if( !strcmp((*it).m_name,sigName) )
+    {
+      m_signals.erase(it);
+      break;
+    }
+  }
+}
+#endif
+
+ATErr ATIf::open(Serial* pSerial) //Deactivate echo, etc
+{
+  DBG("Opening...\n");
+  m_isOpen = true; //Must be set so that the serial port-related fns work
+  //Setup options  
+//  pSerial->baud(BAUDRATE); //FIXME
+  SerialBuf::attach(pSerial);
+
+  setReadMode(false); //Discard chars
+  setTimeout(1000);
+  setLineMode(true); //Line Mode
+  
+  DBG("Trmt...\n");
+ // printf("AT+IPR=%d", BAUDRATE); //FIXME
+  printf("ATZ"); //Reset
+  wait(.100);
+  printf("ATE"); //Deactivate echo
+  wait(.500);
+  flushBuffer();
+  
+  DBG("ATZ ATE...\n");
+  
+  int len = writeLine("ATV1");
+  ATErr err = AT_OK;
+  if(len<0)
+    err=(ATErr)len;
+    
+  if(!err)
+  {
+    err = checkOK();
+    if (err) //No ACK from module
+    {
+      DBG("\r\nOpening port, error %d.", err);
+      if(err==AT_TIMEOUT)
+        err = AT_NOANSWER;
+    }
+  }
+  
+  if(err)
+  {
+    SerialBuf::detach();
+    m_isOpen = false;
+    return err;
+  }
+  
+  DBG("\r\nNo error.");
+  #if 0//FIXME
+  m_signalsEnable = true;
+  #endif
+  //FIXME:
+//  m_pSerial->attach<ATIf>(this, &ATIf::onSerialInterrupt);
+  
+  return AT_OK;
+}
+
+#if NET_USB_SERIAL
+ATErr ATIf::open(UsbSerial* pUsbSerial) //Deactivate echo, etc
+{
+  DBG("Opening...\n");
+  m_isOpen = true; //Must be set so that the serial port-related fns work
+  //Setup options  
+  SerialBuf::attach(pUsbSerial);
+
+  setReadMode(false); //Discard chars
+  setTimeout(1000);
+  setLineMode(true); //Line Mode
+
+  printf("ATZ"); //Reinit
+  wait(.500);  
+  //flushBuffer();
+//  printf("ATE0 ^CURC=0"); //Deactivate echo & notif
+  printf("ATE0"); //Deactivate echo & notif
+  wait(.500);
+  flushBuffer();
+  
+  DBG("ATZ ATE...\n");
+  
+  int len = writeLine("ATQ0 V1 S0=0 &C1 &D2 +FCLASS=0");//writeLine("ATQ0 V1 S0=0 &C1 &D2 +FCLASS=0");
+  ATErr err = AT_OK;
+  if(len<0)
+    err=(ATErr)len;
+    
+  if(!err)
+  {
+    err = checkOK();
+    if (err) //No ACK from module
+    {
+      DBG("Opening port, error %d.\n", err);
+      if(err==AT_TIMEOUT)
+        err = AT_NOANSWER;
+    }
+  }
+  
+  if(err)
+  {
+    SerialBuf::detach();
+    m_isOpen = false;
+    return err;
+  }
+  
+  DBG("No error.\n");
+  #if 0//FIXME
+  m_signalsEnable = true;
+  #endif
+  //FIXME:
+//  m_pSerial->attach<ATIf>(this, &ATIf::onSerialInterrupt);
+  
+  return AT_OK;
+}
+#endif
+
+ATErr ATIf::close() //Release port
+{
+  SerialBuf::detach(); //Detach serial buf
+  m_isOpen = false;
+  //m_signalsEnable = false;
+  return AT_OK;
+}
+
+ATErr ATIf::flushBuffer()
+{
+  if(!m_isOpen)
+    return AT_CLOSED;
+  
+  int len=0;
+  //char c;
+  while(readable())
+  {
+    //DBG("Readable\n"); 
+    /*c =*/ getc();
+    //DBG("\r\n[%c] discarded.", c);    
+ //   wait(0.01);
+    len++;
+  }
+  
+  DBG("\r\n%d chars discarded.", len);
+  
+  return AT_OK;
+}
+
+ATErr ATIf::flushLine(int timeout)
+{
+  if(!m_isOpen)
+    return AT_CLOSED;
+    
+  Timer timer;
+  
+  timer.start();
+  
+  int len=0;
+  char c=0;
+  while(true)
+  {
+    while(!readable())
+    {      if(timer.read_ms()>timeout)
+      {
+ //       DBG("Timeout!!0");
+        return AT_TIMEOUT;
+      }
+    }
+    if(c=='\x0D')
+    {
+      c = getc();
+      len++;
+      if(c=='\x0A')
+        break;
+    }
+    else
+    {
+      c = getc();
+      len++;
+    }
+  }
+  
+//  DBG("\r\n%d chars discarded.", len);
+  
+  return AT_OK;
+}
+
+#if 0
+bool ATIf::onRead()
+{
+  if(!m_signalsEnable)
+    return false;
+
+  //Save Usermode params
+  volatile int u_readTimeout = m_readTimeout;
+  volatile bool u_lineMode = m_lineMode;
+//  bool u_isOpen = m_isOpen;
+  SerialBuf::setReadMode(true);
+  
+  m_readTimeout = 0; //No timeout in an interrupt fn!
+  
+  bool handled;
+  if(!!flushLine(0))
+  {
+    SerialBuf::resetRead();
+    //Not a complete line here, wait...
+    handled = false;
+  }
+  else
+  {
+   SerialBuf::resetRead();
+   handled = true; 
+   if( handleSignal() ) //Was that a signal ?
+    {
+      //OK, discard data since it has been processed
+      SerialBuf::flushRead();
+    }
+    else
+    {
+      //Keep data since it has not been processed yet
+      //Have to be processed in usermode
+      SerialBuf::resetRead();
+//      handled = false; 
+    }
+  }  
+  //Restore Usermode params
+  m_readTimeout = u_readTimeout;
+  m_lineMode = u_lineMode;
+  //m_isOpen = u_isOpen;
+  return handled;
+}
+#endif
+
+ATErr ATIf::rawOpen(Serial* pSerial, int baudrate) //Simple open function for similar non-conforming protocols
+{
+  DBG("\r\nOpening...");
+  m_isOpen = true; //Must be set so that the serial port-related fns work
+  //Setup options  
+  pSerial->baud(baudrate);
+  SerialBuf::attach(pSerial);
+
+  return AT_OK;
+}
+
+#if 0
+ATErr ATIf::command(const char* cmd, char* result, int resultLen, int timeout) ////WARN/FIXME: result has to be long enough!!!
+{  
+  if(!m_isOpen)
+    return AT_CLOSED;
+  
+  flushBuffer();
+  
+  int err;
+  err = writeLine(cmd);
+  
+  if(err<0)
+    { m_receiveStatus = AT_READY; return (ATErr)err; }
+    
+  err = readLine(result, resultLen, timeout);
+  
+  if(err<0)
+    { m_receiveStatus = AT_READY; return (ATErr)err; }
+      
+  m_receiveStatus = AT_READY;
+    
+  return AT_OK;
+  
+}
+#endif
+
+ATErr ATIf::write(const char* cmd, bool lineMode /*= false*/)
+{
+  if(!m_isOpen)
+    return AT_CLOSED;
+
+  int err;  
+  err = lineMode ? writeLine(cmd) : writeRaw(cmd);
+
+  if(err<0)
+    return (ATErr)err;
+      
+  return AT_OK;
+}
+
+
+ATErr ATIf::read(char* result, int resultMaxLen, int timeout, bool lineMode /*= false*/, int resultMinLen/* = 0*/)
+{
+  if(!m_isOpen)
+    return AT_CLOSED;
+  
+  int err;  
+  err = lineMode ? readLine(result, resultMaxLen, timeout) :  readRaw(result, resultMaxLen, timeout, resultMinLen);
+  
+  if(err<0)
+    return (ATErr)err;
+    
+  return AT_OK;
+}
+
+bool ATIf::isOpen()
+{
+  return m_isOpen;
+}
+
+ATErr ATIf::checkOK() //Helper fn to quickly check that OK has been returned
+{
+  char ret[16] = {0};
+  int err = readLine(ret,16,m_readTimeout);
+  
+  if(err<0)
+  {
+    DBG("\r\nError in check (%s).\r\n", ret);
+    flushBuffer(); //Discard anything in buf to avoid misparsing in the following calls
+    return (ATErr)err;
+  }
+  
+  if(!!strcmp("OK",ret))
+  {
+    DBG("\r\nNot an OK <%s>.\r\n", ret);
+    flushBuffer();
+    return AT_ERROR;
+  }
+  
+  DBG("\r\nCHECK OK\r\n");
+  
+  return AT_OK;
+}
+
+#if 0
+void ATIf::onSerialInterrupt() //Callback from m_pSerial
+{
+return;//FIXME
+
+  if(m_receiveStatus == AT_READING)
+    return;
+
+  if( m_cbObj && m_cbMeth )
+    return (m_cbObj->*m_cbMeth)();
+}
+#endif
+
+int ATIf::readLine(char* line, int maxLen, int timeout) //Read a single line from serial port, return length or ATErr(<0)
+{
+#ifdef OLDREADLINE
+  if(!m_isOpen)
+    return AT_CLOSED;
+    
+  int len = 0;
+  
+  Timer timer;
+  
+  timer.start();
+#ifdef __START_CLRF_MANDAT
+  for( int i=0; i<2; i++ )
+  {
+    while(!readable())
+    {
+      if(timer.read_ms()>timeout)
+      {
+//        DBG("Timeout!!0");
+        return AT_TIMEOUT;
+      }
+      wait_ms(10); //Wait 10ms
+    }
+    *line = getc();
+  //  DBG("In readLine(), read : %c", *line);
+    if( ( (i == 0) && (*line!='\x0D') )
+     || ( (i == 1) && (*line!='\x0A') ) )
+     return AT_PARSE;
+  }
+#else
+  
+#endif
+
+  for( ; len < maxLen ; len++ )
+  {
+    timer.reset();
+    while(!readable())
+    {
+      if(timer.read_ms()>timeout)
+      {
+//        DBG("Timeout!!1");
+        return AT_TIMEOUT;
+      }
+      wait_ms(10); //Wait 10ms
+    }
+    *line = getc();
+    //DBG("In readLine(), read : %c", *line);
+
+    if(*line=='\x0D')
+    {
+      timer.reset();
+      while(!readable())
+      {
+        if(timer.read_ms()>timeout)
+        {
+          return AT_TIMEOUT;
+        }
+        wait_ms(10); //Wait 1ms
+      }
+      *line = getc();
+    //  DBG("In readLine(), read : %c", *line);
+      if(*line=='\x0A')
+      {
+        if(len==0)
+        {
+          //Start of line
+          len--;
+          continue;
+        }
+        else
+        {
+          *line=0; //End of line
+          break;
+        }
+      }
+      else
+      {
+        //Should not happen, must have lost some bytes somewhere or non AT protocol
+        return AT_PARSE;
+      }
+    }
+    line++;
+  }
+  
+  if(len==maxLen)
+    return AT_INCOMPLETE; //Buffer full, must call this method again to get end of line
+  
+  return len;
+#else
+ if(!m_isOpen)
+    return AT_CLOSED;
+  
+  Timer timer;  
+  timer.start();
+
+  int len = 0;
+  while( len < maxLen )
+  {
+    timer.reset();
+    while(!readable())
+    {
+      if(timer.read_ms()>timeout)
+      {
+        return AT_TIMEOUT;
+      }
+      wait_ms(10); //Wait 10ms
+    }
+    *line = getc();
+
+    if( (*line=='\x0D') || (*line=='\x0A') )
+    {
+    
+      if(len==0)
+      {
+        //Start of line
+        continue;
+      }
+      else
+      {
+        *line=0; //End of line
+        break;
+      }
+    }
+    len++;  
+    line++;
+  }
+  
+  if(len==maxLen)
+    return AT_INCOMPLETE; //Buffer full, must call this method again to get end of line
+  
+  return len;
+#endif
+}
+
+int ATIf::writeLine(const char* line) //Write a single line to serial port
+{
+//  char* line = (char*) _line;
+  if(!m_isOpen)
+    return AT_CLOSED;
+  
+//  DBG("\n\rIn writeline.");
+  
+  int len = 0;
+
+  while(*line)
+  {
+    putc(*line);
+    line++;
+    len++;
+  }
+  
+ /* putc('\r');
+  
+    putc('\n');*/
+  
+  putc('\x0D');
+//  putc('\x0A');
+
+// DBG("\n\rWritten %d + 1", len);
+  
+  return len;
+ 
+}
+
+
+    
+int ATIf::readRaw(char* str, int maxLen, int timeout /*= 0*/, int minLen /*= 0*/) //Read from serial port in buf
+{
+  if(!m_isOpen)
+    return AT_CLOSED;
+    
+  int len = 0;
+  
+  Timer timer;
+  
+  timer.start();
+
+  for( ; len < maxLen ; len++ )
+  {
+    while( (len < minLen) && !readable())
+    {
+      if(timer.read_ms()>timeout)
+      {
+        return AT_TIMEOUT;
+      }
+      wait(.01); //Wait 10ms
+    }
+    
+    if(!readable()) //Buffer read entirely
+      break;
+      
+    *str = getc();
+    str++;
+    len++;
+  }
+  
+  *str = 0; //End char
+  
+  return len;
+  
+}
+
+int ATIf::writeRaw(const char* str) //Write directly to serial port    
+{
+  if(!m_isOpen)
+    return AT_CLOSED;
+    
+  int len = 0;
+
+  while(*str)
+  {
+    putc(*str);
+    str++;
+    len++;
+  }
+  
+  return len;
+}    
+
+#if 0
+bool ATIf::handleSignal()
+{
+  bool beg = false;
+  
+//  SerialBuf::setReadMode(true); //Keep chars in buf when read  
+//  SerialBuf::resetRead();
+   
+  //if( !m_pCurrentSignal ) //If no signal asked for this line
+  if(true) //Check anyway, could have been some parsing error before
+  {
+    //Extract Signal Name
+    char sigName[32]; //Should not be longer than that
+    setLineMode(true); //Read one line  
+
+    int len = scanf("%[^:]:%*[^\n]", sigName);
+    if(len != 1)
+      return false; //This is not a signal      
+ //   DBG("\r\nGot signal %s\r\n", sigName);
+  
+    list<ATSigHandler>::iterator it;
+
+    for ( it = m_signals.begin(); it != m_signals.end(); it++ )
+    {
+      if( !strcmp((*it).m_name, sigName) )
+      {
+  //      DBG("\r\nFound signal %s\r\n", sigName);
+        m_pCurrentSignal = &(*it);
+        beg = true;
+        break;
+      }
+    }
+    
+    
+  }
+  
+  if( !m_pCurrentSignal ) 
+    return false; //This is not a signal or it cannot be handled
+    
+  bool moreData = false;
+  //Call signal handling routine
+  SerialBuf::resetRead(); //Rollback so that the handling fn can call scanf properly
+  bool result = ((m_pCurrentSignal->m_cbObj)->*(m_pCurrentSignal->m_cbMeth))(this, beg, &moreData);
+  
+  if( !moreData ) //Processing completed
+  {
+    m_pCurrentSignal = NULL;
+  }
+  
+  return result;
+}
+#endif
+
+#endif