Dirk-Willem van Gulik (NXP/mbed)
/
AmpereMeter
Example self-announcing webserver which controls a servo through a smallHTML userinterface.
drv/serial/buf/SerialBuf.cpp
- Committer:
- dirkx
- Date:
- 2010-08-14
- Revision:
- 0:a259777c45a3
File content as of revision 0:a259777c45a3:
/* 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 "SerialBuf.h" #include "mbed.h" //#define __DEBUG #include "dbg/dbg.h" #include "netCfg.h" #if NET_GPRS #if NET_USB_SERIAL #define m_pStream( a ) (m_pSerial?m_pSerial->a:m_pUsbSerial->a) #else #define m_pStream( a ) (m_pSerial->a) #endif SerialBuf::SerialBuf(int len) : m_trmt(false), m_pSerial(NULL), m_intCanReadData(true), m_readMode(false) //Buffer length #if NET_USB_SERIAL , m_pUsbSerial(NULL) #endif { m_buf = new char[len]; m_bufLen=len; m_pRead=m_buf; m_pReadStart=m_buf; m_pReadByInt=m_buf; m_pWrite=m_buf; } SerialBuf::~SerialBuf() { delete[] m_buf; } void SerialBuf::attach(Serial* pSerial) { m_pSerial = pSerial; m_pSerial->attach<SerialBuf>(this, &SerialBuf::onSerialInterrupt); // onSerialInterrupt(); //Flush hw buffer into current buf } #if NET_USB_SERIAL void SerialBuf::attach(UsbSerial* pUsbSerial) { m_pUsbSerial = pUsbSerial; //m_pUsbSerial->attach<SerialBuf>(this, &SerialBuf::onSerialInterrupt); m_usbTick.attach_us<SerialBuf>(this, &SerialBuf::onSerialInterrupt, 10000); } #endif void SerialBuf::detach() { if(m_pSerial) { m_pSerial->attach(0); m_pSerial = NULL; } #if NET_USB_SERIAL else if(m_pUsbSerial) { m_usbTick.detach(); m_pUsbSerial = NULL; } #endif } void SerialBuf::onSerialInterrupt() //Callback from m_pSerial { //DBG("\r\n[INT]"); // Timer tmr; // tmr.start(); // static volatile bool incompleteData = true; // static volatile char* pLastIntReadPos = m_buf; if(!(m_pStream(readable()))) { return; } int len=0; do { if(room()>0) { len++; #ifdef __DEBUGVERBOSE char c = m_pStream(getc()); DBG("\r\n[%c]",c); put(c); #else put(m_pStream(getc())); #endif } else { DBG("\r\nWARN: SerialBuf Overrun"); m_pStream(getc()); } } while(m_pStream(readable())); // DBG("\r\n[/INT]=*%d*\r\n w len=*%d*",tmr.read_us(),len); if( m_intCanReadData ) { volatile bool u_readMode = m_readMode; //Save User context on interrupt volatile bool handled = onRead(); if(handled) { m_pReadByInt = m_pRead; if(m_pRead==m_pReadStart) { //Data has been processed } else { m_pRead = m_pReadStart; m_intCanReadData = false; //Data has to be processed in user space } } setReadMode( u_readMode ); } #if 0 if( incompleteData || ( pLastIntReadPos != m_pRead ) ) { bool u_readMode = m_readMode; //Save User context on interrupt incompleteData = onRead(); if(!incompleteData) m_pRead = m_pReadStart; pLastIntReadPos = m_pRead; } #endif } char SerialBuf::getc() { // DBG("\r\n\[GETC]"); #if 0 if(m_trmt) //Was transmitting { DBG("\r\n<\r\n"); m_trmt=false; } #endif char c; c = get(); DBG("%c", c); // DBG("\r\n[/GETC]"); return c; } void SerialBuf::putc(char c) { #if 0 if(!m_trmt) //Was receiving { DBG("\r\n>\r\n"); m_trmt=true; } #endif // m_pSerial->writeable(); // while(!m_pSerial->writeable() /*|| m_pSerial->readable()*/) // { // wait_us(100); // DBG("\r\nWait...\r\n"); // } /* NVIC_DisableIRQ(UART1_IRQn); NVIC_DisableIRQ(UART2_IRQn); NVIC_DisableIRQ(UART3_IRQn); */ // onSerialInterrupt(); m_pStream(putc(c)); /* NVIC_EnableIRQ(UART1_IRQn); NVIC_EnableIRQ(UART2_IRQn); NVIC_EnableIRQ(UART3_IRQn); */ DBG("%c", c); } /* Buffer Stuff */ bool SerialBuf::readable() { // onSerialInterrupt(); //Flush hw buffer into current buf // DBG("\r\nLen=%d",len()); return (len()>0); } bool SerialBuf::writeable() { return m_pStream(writeable()); } void SerialBuf::setReadMode(bool readMode) //If true, keeps chars in buf when read, false by default { if(m_readMode == true && readMode == false) { //Trash bytes that have been read flushRead(); } m_readMode=readMode; } void SerialBuf::flushRead() //Delete chars that have been read (only useful with readMode = true) { m_pReadStart = m_pRead; } void SerialBuf::resetRead() //Go back to initial read position (only useful with readMode = true) { m_pRead = m_pReadStart; } bool SerialBuf::onRead() { return false; //Nothing here } char SerialBuf::get() //Get a char from buf { //WARN: Must call len() before char c = *m_pRead; m_pRead++; if(m_pRead>=m_buf+m_bufLen) m_pRead=m_buf; if(!m_readMode) //If readmode=false, trash this char m_pReadStart=m_pRead; if(m_pRead==m_pReadByInt) //Next message can be processed by interrupt m_intCanReadData = true; /* else if(m_intCanReadData) //Increment this address m_pReadByInt=m_pRead;*/ return c; } void SerialBuf::put(char c) //Put a char in buf { //WARN: Must call room() before *m_pWrite = c; m_pWrite++; if(m_pWrite>=m_buf+m_bufLen) m_pWrite=m_buf; } int SerialBuf::room() //Return room available in buf { //return m_bufLen - len() - 1; //-1 is to avoid loop if ( m_pReadStart > m_pWrite ) return ( m_pReadStart - m_pWrite - 1 ); else return m_bufLen - ( m_pWrite - m_pReadStart ) - 1; } int SerialBuf::len() //Return chars length in buf { if ( m_pWrite >= m_pRead ) return ( m_pWrite - m_pRead ); else return m_bufLen - ( m_pRead - m_pWrite ); // = ( ( m_buf + m_bufLen) - m_pRead ) + ( m_pWrite - m_buf ) } #endif