avr/uart
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Merged changes from submodule branch

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This commit is contained in:
BlackMark 2016-10-29 17:22:34 +02:00
parent 5ba8cc4ec3
commit 8fa18f8e88
2 changed files with 184 additions and 8 deletions
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178
usart/usart.cpp
View File

@ -235,6 +235,66 @@ void USART0::setMode( Mode enmMode )
setUCSRC( ui8UCSRC );
}
//////////////////////////////////////////////////////////////////////////
uint32_t USART0::getBaudRate()
{
uint16_t ui16UBRR;
ui16UBRR = static_cast<uint16_t>( *m_vui8pUBRRH ) << 8;
ui16UBRR |= *m_vui8pUBRRL;
return F_CPU / ( static_cast<uint32_t>( 16 ) * ( ui16UBRR + 1 ) );
}
//////////////////////////////////////////////////////////////////////////
uint8_t USART0::getDataBits()
{
if( *m_vui8pUCSRB & ( 1 << UCSZ2_D ) )
{
return 9;
}
uint8_t ui8UCSRC = readUCSRC();
bool bZeroBit = ui8UCSRC & ( 1 << UCSZ0_D );
bool bOneBit = ui8UCSRC & ( 1 << UCSZ1_D );
return 5 + ( bOneBit << 1 | bZeroBit );
}
//////////////////////////////////////////////////////////////////////////
USART0::Parity USART0::getParity()
{
uint8_t ui8UCSRC = readUCSRC();
bool bZeroBit = ui8UCSRC & ( 1 << UPM0_D );
bool bOneBit = ui8UCSRC & ( 1 << UPM1_D );
if( bOneBit && !bZeroBit )
{
return Parity::EVEN;
}
if( bOneBit && bZeroBit )
{
return Parity::ODD;
}
return Parity::DISABLED;
}
//////////////////////////////////////////////////////////////////////////
USART0::StopBit USART0::getStopBits()
{
uint8_t ui8UCSRC = readUCSRC();
if( ui8UCSRC & ( 1 << USBS_D ) )
{
return StopBit::TWO;
}
return StopBit::ONE;
}
//////////////////////////////////////////////////////////////////////////
USART0::~USART0()
{
@ -300,7 +360,7 @@ bool USART0::receiveByte( uint8_t &ui8Data, uint16_t ui16TimeoutMS )
{
_delay_ms( 1 );
if( ui16DelayCounter++ >= ui16TimeoutMS )
if( ui16DelayCounter++ > ui16TimeoutMS )
{
return false;
}
@ -309,6 +369,39 @@ bool USART0::receiveByte( uint8_t &ui8Data, uint16_t ui16TimeoutMS )
return true;
}
//////////////////////////////////////////////////////////////////////////
uint8_t USART0::receiveByteBlocked()
{
uint8_t ui8Received;
while( !receiveByte( ui8Received ) );
return ui8Received;
}
//////////////////////////////////////////////////////////////////////////
uint8_t USART0::receivePeek()
{
uint8_t ui8Received;
if( !( SREG & ( 1 << SREG_I ) && m_vsizeRXBufferHead == m_vsizeRXBufferTail ) )
{
while( !( *m_vui8pUCSRA & ( 1 << RXC_D ) ) );
ui8Received = *m_vui8pUDR;
size_t sizeIndex = ( m_vsizeRXBufferHead + 1 ) % sm_sizeRXBUFFER_SIZE;
if( sizeIndex != m_vsizeRXBufferTail )
{
m_vui8aRXBuffer[m_vsizeRXBufferHead] = ui8Received;
m_vsizeRXBufferHead = sizeIndex;
}
return ui8Received;
}
while( m_vsizeRXBufferHead == m_vsizeRXBufferTail );
return m_vui8aRXBuffer[m_vsizeRXBufferTail];
}
//////////////////////////////////////////////////////////////////////////
bool USART0::receiveLine( char *szBuffer, size_t sizeBufferLength, const char *szLineTerminator /* = "\r\n" */ )
{
@ -324,6 +417,41 @@ bool USART0::receiveLine( char *szBuffer, size_t sizeBufferLength, const char *s
if( strstr( szBuffer, szLineTerminator ) )
{
szBuffer[sizeReceived - strlen( szLineTerminator )] = '\0';
return true;
}
}
return false;
}
//////////////////////////////////////////////////////////////////////////
bool USART0::receiveLine( char *szBuffer, size_t sizeBufferLength, uint16_t ui16TimeoutMS, const char *szLineTerminator /* = "\r\n" */ )
{
size_t sizeReceived = 0;
while( sizeReceived < sizeBufferLength - 1 )
{
uint8_t ui8ReceiveByte;
uint16_t ui16DelayCounter = 0;
while( !receiveByte( ui8ReceiveByte ) )
{
_delay_ms( 1 );
if( ui16DelayCounter++ > ui16TimeoutMS )
{
szBuffer[sizeReceived] = '\0';
return false;
}
}
szBuffer[sizeReceived++] = ui8ReceiveByte;
szBuffer[sizeReceived] = '\0';
if( strstr( szBuffer, szLineTerminator ) )
{
szBuffer[sizeReceived - strlen( szLineTerminator )] = '\0';
return true;
}
}
@ -334,16 +462,56 @@ bool USART0::receiveLine( char *szBuffer, size_t sizeBufferLength, const char *s
//////////////////////////////////////////////////////////////////////////
void USART0::flushReceive()
{
uint8_t ui8Received;
uint32_t ui32BaudRate = getBaudRate();
uint8_t ui8BitsPerSymbol = 1;
while( m_vsizeRXBufferHead != m_vsizeRXBufferTail )
ui8BitsPerSymbol += getDataBits();
if( getParity() != Parity::DISABLED )
{
receiveByte( ui8Received );
ui8BitsPerSymbol += 1;
}
if( !( SREG & ( 1 << SREG_I ) ) && ( *m_vui8pUCSRA & ( 1 << RXC_D ) ) )
if( getStopBits() == StopBit::ONE )
{
ui8BitsPerSymbol += 1;
}
else
{
ui8BitsPerSymbol += 2;
}
uint16_t ui16BaudDelayMS = static_cast<uint16_t>( ( 1000.0 * ui8BitsPerSymbol ) / ui32BaudRate ) + 1;
uint8_t ui8Received;
if( !( SREG & ( 1 << SREG_I ) ) )
{
while( true )
{
for( uint16_t i = 0; i < ui16BaudDelayMS; ++i )
{
_delay_ms( 1 );
}
if( m_vsizeRXBufferHead != m_vsizeRXBufferTail )
{
receiveByte( ui8Received );
continue;
}
if( ( *m_vui8pUCSRA & ( 1 << RXC_D ) ) )
{
ui8Received = *m_vui8pUDR;
continue;
}
break;
}
}
else
{
while( receiveByte( ui8Received, ui16BaudDelayMS ) );
}
}

12
usart/usart.h
View File

@ -1,7 +1,7 @@
/*
* Copyright (c) by BlackMark 2015-2016
* Date 24/05/2016
* Version 2.9
* Date 26/05/2016
* Version 3.3
*/
#ifndef USART_H
@ -128,6 +128,11 @@ private:
void setStopBits( StopBit enmStopBits );
void setMode( Mode enmMode );
uint32_t getBaudRate();
uint8_t getDataBits();
Parity getParity();
StopBit getStopBits();
~USART0();
public:
@ -139,7 +144,10 @@ public:
bool receiveByte( uint8_t &ui8Data );
bool receiveByte( uint8_t &ui8Data, uint16_t ui16TimeoutMS );
uint8_t receiveByteBlocked();
uint8_t receivePeek();
bool receiveLine( char *szBuffer, size_t sizeBufferLength, const char *szLineTerminator = "\r\n" );
bool receiveLine( char *szBuffer, size_t sizeBufferLength, uint16_t ui16TimeoutMS, const char *szLineTerminator = "\r\n" );
void flushReceive();
void transmitByte( uint8_t ui8Data );