Diff: USBHost3GModule/WANDongleSerialPort.cpp

Revision:

17:c7b1b8451598

Child:

18:37c948cf0dbf

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBHost3GModule/WANDongleSerialPort.cpp	Wed Oct 16 14:15:18 2013 +0100
@@ -0,0 +1,340 @@
+/* Copyright (c) 2010-2012 mbed.org, MIT License
+*
+* 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 "USBHostConf.h"
+
+#ifdef USBHOST_3GMODULE
+
+#define __DEBUG__ 0
+#ifndef __MODULE__
+#define __MODULE__ "WANDongleSerialPort.cpp"
+#endif
+
+#include "core/dbg.h"
+#include <cstdint>
+#include "rtos.h"
+
+#include "WANDongleSerialPort.h"
+
+WANDongleSerialPort::WANDongleSerialPort() : cb_tx_en(false), cb_rx_en(false), listener(NULL)
+{
+  reset();
+}
+
+void WANDongleSerialPort::init(USBHost* pHost)
+{
+  host = pHost;
+}
+
+void WANDongleSerialPort::reset()
+{
+  tx_mtx.lock();
+  rx_mtx.lock();
+
+  bulk_in = NULL;
+  bulk_out = NULL;
+
+  buf_out_len = 0;
+  max_out_size = 0;
+  lock_tx = false;
+  cb_tx_pending = false;
+
+  buf_in_len = 0;
+  buf_in_read_pos = 0;
+  lock_rx = false;
+  cb_rx_pending = false;
+  
+  tx_mtx.unlock();
+  rx_mtx.unlock();
+}
+
+int WANDongleSerialPort::readPacket()
+{
+  DBG("Read packet on %p", this);
+  rx_mtx.lock();
+  if(lock_rx)
+  {
+    ERR("Fail");
+    rx_mtx.unlock();
+    return -1;
+  }
+  
+  if( bulk_in == NULL )
+  {
+    WARN("Port is disconnected");
+    rx_mtx.unlock();
+    return -1;
+  }
+
+  lock_rx = true; //Receiving
+  rx_mtx.unlock();
+//  DBG("readPacket");
+  //lock_rx.lock();
+  USB_TYPE res = host->bulkRead(dev, (USBEndpoint *)bulk_in, buf_in, ((USBEndpoint *)bulk_in)->getSize(), false); //Queue transfer
+  if(res != USB_TYPE_PROCESSING)
+  {
+    //lock_rx.unlock();
+    ERR("host->bulkRead() returned %d", res);
+    Thread::wait(100);
+    return -1;
+  }
+  return 0;
+}
+
+int WANDongleSerialPort::writePacket()
+{
+  tx_mtx.lock();
+  if(lock_tx)
+  {
+    ERR("Fail");
+    tx_mtx.unlock();
+    return -1;
+  }
+  
+  if( bulk_out == NULL )
+  {
+    WARN("Port is disconnected");
+    tx_mtx.unlock();
+    return -1;
+  }
+
+  lock_tx = true; //Transmitting
+  tx_mtx.unlock();
+//  DBG("writePacket");
+
+  //lock_tx.lock();
+  USB_TYPE res = host->bulkWrite(dev, (USBEndpoint *)bulk_out, buf_out, buf_out_len, false); //Queue transfer
+  if(res != USB_TYPE_PROCESSING)
+  {
+    //lock_tx.unlock();
+    ERR("host->bulkWrite() returned %d", res);
+    Thread::wait(100);
+    return -1;
+  }
+  return 0;
+}
+
+int WANDongleSerialPort::putc(int c)
+{
+  tx_mtx.lock();
+  if(!lock_tx)
+  {
+    if(buf_out_len < max_out_size)
+    {
+      buf_out[buf_out_len] = (uint8_t)c;
+      buf_out_len++;
+    }
+  }
+  else
+  {
+    ERR("CAN'T WRITE!");
+  }
+  tx_mtx.unlock();
+  return c;
+}
+
+int WANDongleSerialPort::getc()
+{
+  rx_mtx.lock();
+  int c = 0;
+  if(!lock_rx)
+  {
+    if(buf_in_read_pos < buf_in_len)
+    {
+      c = (int)buf_in[buf_in_read_pos];
+      buf_in_read_pos++;
+    }
+  }
+  else
+  {
+    ERR("CAN'T READ!");
+  }
+  rx_mtx.unlock();
+  return c;
+}
+
+int WANDongleSerialPort::readable()
+{
+  rx_mtx.lock();
+  if (lock_rx)
+  {
+    rx_mtx.unlock();
+    return 0;
+  }
+
+ /* if( !lock_rx.trylock() )
+  {
+    return 0;
+  }*/
+  int res = buf_in_len - buf_in_read_pos;
+  //lock_rx.unlock();
+  rx_mtx.unlock();
+  return res;
+}
+
+int WANDongleSerialPort::writeable()
+{
+  tx_mtx.lock();
+  if (lock_tx)
+  {
+    tx_mtx.unlock();
+    return 0;
+  }
+
+  /*if( !lock_tx.trylock() )
+  {
+    return 0;
+  }*/
+  int res = max_out_size - buf_out_len;
+  tx_mtx.unlock();
+ //lock_tx.unlock();
+  return res;
+}
+
+void WANDongleSerialPort::attach(IUSBHostSerialListener* pListener)
+{
+  if(pListener == NULL)
+  {
+    setupIrq(false, RxIrq);
+    setupIrq(false, TxIrq);
+  }
+  listener = pListener;
+  if(pListener != NULL)
+  {
+    setupIrq(true, RxIrq);
+    setupIrq(true, TxIrq);
+  }
+}
+
+void WANDongleSerialPort::setupIrq(bool en, IrqType irq /*= RxIrq*/)
+{
+  switch(irq)
+  {
+  case RxIrq:
+    rx_mtx.lock();
+    cb_rx_en = en;
+    if(en && cb_rx_pending)
+    {
+      cb_rx_pending = false;
+      rx_mtx.unlock();
+      listener->readable(); //Process the interrupt that was raised
+    }
+    else
+    {
+      rx_mtx.unlock();
+    }
+    break;
+  case TxIrq:
+    tx_mtx.lock();
+    cb_tx_en = en;
+    if(en && cb_tx_pending)
+    {
+      cb_tx_pending = false;
+      tx_mtx.unlock();
+      listener->writeable(); //Process the interrupt that was raised
+    }
+    else
+    {
+      tx_mtx.unlock();
+    }
+    break;
+  }
+}
+
+
+void WANDongleSerialPort::connect( USBDeviceConnected* pDev, USBEndpoint* pInEp, USBEndpoint* pOutEp )
+{
+  dev = pDev;
+  bulk_in = pInEp;
+  bulk_out = pOutEp;
+  max_out_size = bulk_out->getSize();
+  if( max_out_size > WANDONGLE_MAX_OUTEP_SIZE )
+  {
+    max_out_size = WANDONGLE_MAX_OUTEP_SIZE;
+  }
+  bulk_in->attach(this, &WANDongleSerialPort::rxHandler);
+  bulk_out->attach(this, &WANDongleSerialPort::txHandler);
+  readPacket(); //Start receiving data
+}
+
+void WANDongleSerialPort::disconnect( )
+{
+    reset();
+}
+
+//Private methods
+
+
+void WANDongleSerialPort::rxHandler()
+{
+  if (((USBEndpoint *) bulk_in)->getState() == USB_TYPE_IDLE) //Success
+  {
+    buf_in_read_pos = 0;
+    buf_in_len = ((USBEndpoint *) bulk_in)->getLengthTransferred(); //Update length
+    //lock_rx.unlock();
+    rx_mtx.lock();
+    lock_rx = false; //Transmission complete
+    if(cb_rx_en)
+    {
+      rx_mtx.unlock();
+      listener->readable(); //Call handler from the IRQ context
+      //readPacket() should be called by the handler subsequently once the buffer has been emptied
+    }
+    else
+    {
+      cb_rx_pending = true; //Queue the callback
+      rx_mtx.unlock();
+    }
+
+  }
+  else //Error, try reading again
+  {
+    //lock_rx.unlock();
+    DBG("Trying again");
+    readPacket();
+  }
+}
+
+void WANDongleSerialPort::txHandler()
+{
+  if (((USBEndpoint *) bulk_out)->getState() == USB_TYPE_IDLE) //Success
+  {
+    tx_mtx.lock();
+    buf_out_len = 0; //Reset length
+    lock_tx = false; //Transmission complete
+    //lock_tx.unlock();
+    if(cb_tx_en)
+    {
+      tx_mtx.unlock();
+      listener->writeable(); //Call handler from the IRQ context
+      //writePacket() should be called by the handler subsequently once the buffer has been filled
+    }
+    else
+    {
+      cb_tx_pending = true; //Queue the callback
+      tx_mtx.unlock();
+    }
+  }
+  else //Error, try reading again
+  {
+    //lock_tx.unlock();
+    writePacket();
+  }
+}
+
+#endif /* USBHOST_3GMODULE */