u-blox / C027_Support

support library for C027 helper functions for Buffer Pipes, Buffered Serial Port (rtos capable) and GPS parsing. It includes modem APIs for USSD, SMS and Sockets.

Dependents:   HTTPClient_Cellular_HelloWorld Cellular_HelloMQTT MbedSmartRestMain Car_Bon_car_module ... more

This library is intended to be used with u-blox products such as the C027 or a shield with u-blox cellular and GPS modules like the cellular and positioning shield from Embedded Artist.

For 2G/GSM and 3G/UMTS you need to:

  • have a SIM card and know its PIN number
  • need to know you network operators APN setting These setting should be passed to the connect or init and join functions. You can also extend the APN database in MDMAPN.h.

For CDMA products you need to make sure that you have provisioned and activated the modem with either Sprint or Verizon.

SerialPipe.cpp

Committer:
mazgch
Date:
2017-04-20
Revision:
139:fd9fe498f142
Parent:
116:709a6386e685

File content as of revision 139:fd9fe498f142:

#include "SerialPipe.h"

SerialPipe::SerialPipe(PinName tx, PinName rx, int baudrate, int rxSize, int txSize) : 
            _SerialPipeBase(tx,rx,baudrate), 
            _pipeRx( (rx!=NC) ? rxSize : 0), 
            _pipeTx( (tx!=NC) ? txSize : 0)
{
    if (rx!=NC)
        attach(this, &SerialPipe::rxIrqBuf, RxIrq);
}

SerialPipe::~SerialPipe(void)
{
    attach(NULL, RxIrq);
    attach(NULL, TxIrq);
}

// tx channel
int SerialPipe::writeable(void)    
{
    return _pipeTx.free();
}

int SerialPipe::putc(int c)    
{
    c = _pipeTx.putc(c);
    txStart();
    return c;
}

int SerialPipe::put(const void* buffer, int length, bool blocking)    
{ 
    int count = length;
    const char* ptr = (const char*)buffer;
    if (count)
    {
        do
        {
            int written = _pipeTx.put(ptr, count, false);
            if (written) {
                ptr += written;
                count -= written;
                txStart();
            }
            else if (!blocking)
                break;
            /* nothing / just wait */;
        }
        while (count);
    }
    return (length - count);
}

void SerialPipe::txCopy(void)
{
    while (_SerialPipeBase::writeable() && _pipeTx.readable())
    {
        char c = _pipeTx.getc();
        _SerialPipeBase::_base_putc(c);
    }
}

void SerialPipe::txIrqBuf(void)
{
    txCopy();
    // detach tx isr if we are done 
    if (!_pipeTx.readable())
        attach(NULL, TxIrq);
}

void SerialPipe::txStart(void)
{
    // disable the tx isr to avoid interruption
    attach(NULL, TxIrq);
    txCopy();
    // attach the tx isr to handle the remaining data
    if (_pipeTx.readable())
        attach(this, &SerialPipe::txIrqBuf, TxIrq);
}

// rx channel
int SerialPipe::readable(void)                      
{ 
    return _pipeRx.readable(); 
} 

int SerialPipe::getc(void)                          
{ 
    if (!_pipeRx.readable())
        return EOF;
    return _pipeRx.getc(); 
} 

int SerialPipe::get(void* buffer, int length, bool blocking) 
{ 
    return _pipeRx.get((char*)buffer,length,blocking); 
}

void SerialPipe::rxIrqBuf(void)
{
    while (_SerialPipeBase::readable())
    {
        char c = _SerialPipeBase::_base_getc();
        if (_pipeRx.writeable())
            _pipeRx.putc(c);
        else 
            /* overflow */;
    }
}