642 lines
14 KiB
C++
642 lines
14 KiB
C++
#include "usart.h"
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//////////////////////////////////////////////////////////////////////////
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USART0 USART0::sm_cInstance;
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//////////////////////////////////////////////////////////////////////////
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USART0::USART0()
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{
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#ifdef USART_SHAREDIO
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m_vui8pUCSRA = &UCSRA;
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m_vui8pUCSRB = &UCSRB;
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m_vui8pUCSRC = &UCSRC;
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m_vui8pUBRRH = &UBRRH;
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m_vui8pUBRRL = &UBRRL;
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m_vui8pUDR = &UDR;
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#endif
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#ifndef USART_SHAREDIO
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m_vui8pUCSRA = &UCSR0A;
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m_vui8pUCSRB = &UCSR0B;
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m_vui8pUCSRC = &UCSR0C;
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m_vui8pUBRRH = &UBRR0H;
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m_vui8pUBRRL = &UBRR0L;
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m_vui8pUDR = &UDR0;
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#endif
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m_vsizeRXBufferHead = 0;
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m_vsizeRXBufferTail = 0;
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m_vsizeTXBufferHead = 0;
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m_vsizeTXBufferTail = 0;
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}
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//////////////////////////////////////////////////////////////////////////
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uint8_t USART0::readUCSRC()
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{
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uint8_t ui8UCSRC;
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#ifdef USART_SHAREDIO
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ui8UCSRC = UBRRH;
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ui8UCSRC = UCSRC;
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#else
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ui8UCSRC = *m_vui8pUCSRC;
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#endif
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return ui8UCSRC;
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::setUCSRC( uint8_t ui8UCSRC )
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{
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#ifdef USART_SHAREDIO
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*m_vui8pUCSRC = ( 1 << URSEL ) | ui8UCSRC;
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#else
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*m_vui8pUCSRC = ui8UCSRC;
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#endif
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::setRXState( bool bEnable )
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{
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if( bEnable )
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{
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*m_vui8pUCSRB |= ( 1 << RXEN_D );
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}
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else
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{
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*m_vui8pUCSRB &= ~( 1 << RXEN_D );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::setTXState( bool bEnable )
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{
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if( bEnable )
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{
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*m_vui8pUCSRB |= ( 1 << TXEN_D );
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}
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else
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{
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*m_vui8pUCSRB &= ~( 1 << TXEN_D );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::setRXInterrupt( bool bEnable )
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{
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if( bEnable )
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{
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*m_vui8pUCSRB |= ( 1 << RXCIE_D );
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}
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else
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{
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*m_vui8pUCSRB &= ~( 1 << RXCIE_D );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::setUDREInterrupt( bool bEnable )
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{
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if( bEnable )
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{
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*m_vui8pUCSRB |= ( 1 << UDRIE_D );
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}
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else
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{
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*m_vui8pUCSRB &= ~( 1 << UDRIE_D );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::setBaudRate( uint32_t ui32BaudRate )
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{
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uint16_t ui16UBRR = ( ( F_CPU / ( 16 * ui32BaudRate ) ) - 1 );
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*m_vui8pUBRRH = static_cast<uint8_t>( ui16UBRR >> 8 );
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*m_vui8pUBRRL = static_cast<uint8_t>( ui16UBRR );
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::setDataBits( uint8_t ui8DataBits )
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{
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uint8_t ui8UCSRC = readUCSRC();
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if( ui8DataBits < 5 )
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{
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ui8DataBits = 5;
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}
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else if( ui8DataBits > 9 )
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{
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ui8DataBits = 9;
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}
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if( ui8DataBits <= 8 )
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{
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bool bZeroBit = ( ui8DataBits - 5 ) & 1;
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bool bOneBit = ( ( ui8DataBits - 5 ) >> 1 ) & 1;
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if( bZeroBit )
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{
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ui8UCSRC |= ( 1 << UCSZ0_D );
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}
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else
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{
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ui8UCSRC &= ~( 1 << UCSZ0_D );
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}
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if( bOneBit )
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{
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ui8UCSRC |= ( 1 << UCSZ1_D );
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}
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else
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{
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ui8UCSRC &= ~( 1 << UCSZ1_D );
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}
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*m_vui8pUCSRB &= ~( 1 << UCSZ2_D );
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}
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else
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{
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ui8UCSRC |= ( 1 << UCSZ1_D ) | ( 1 << UCSZ0_D );
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*m_vui8pUCSRB |= ( 1 << UCSZ2_D );
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}
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setUCSRC( ui8UCSRC );
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::setParity( Parity enmParity )
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{
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uint8_t ui8UCSRC = readUCSRC();
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if( enmParity == Parity::DISABLED )
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{
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ui8UCSRC &= ~( ( 1 << UPM1_D ) | ( 1 << UPM0_D ) );
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}
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else if( enmParity == Parity::ODD )
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{
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ui8UCSRC |= ( ( 1 << UPM1_D ) | ( 1 << UPM0_D ) );
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}
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else if( enmParity == Parity::EVEN )
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{
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ui8UCSRC &= ~( ( 1 << UPM0_D ) );
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ui8UCSRC |= ( ( 1 << UPM1_D ) );
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}
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setUCSRC( ui8UCSRC );
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::setStopBits( StopBit enmStopBits )
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{
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uint8_t ui8UCSRC = readUCSRC();
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if( enmStopBits == StopBit::ONE )
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{
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ui8UCSRC &= ~( 1 << USBS_D );
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}
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else if( enmStopBits == StopBit::TWO )
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{
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ui8UCSRC |= ( 1 << USBS_D );
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}
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setUCSRC( ui8UCSRC );
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::setMode( Mode enmMode )
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{
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uint8_t ui8UCSRC = readUCSRC();
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#ifdef USART_SPI
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if( enmMode == Mode::ASYNCHRONOUS )
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{
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ui8UCSRC &= ~( ( 1 << UMSEL1_D ) | ( 1 << UMSEL0_D ) );
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}
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else if( enmMode == Mode::SYNCHRONOUS )
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{
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ui8UCSRC &= ~( 1 << UMSEL1_D );
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ui8UCSRC |= ( 1 << UMSEL0_D );
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}
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else if( enmMode == Mode::MASTERSPI )
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{
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ui8UCSRC |= ( ( 1 << UMSEL1_D ) | ( 1 << UMSEL0_D ) );
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}
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#else
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if( enmMode == Mode::ASYNCHRONOUS )
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{
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ui8UCSRC &= ~( 1 << UMSEL_D );
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}
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else if( enmMode == Mode::SYNCHRONOUS )
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{
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ui8UCSRC |= ( 1 << UMSEL_D );
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}
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#endif
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setUCSRC( ui8UCSRC );
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}
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//////////////////////////////////////////////////////////////////////////
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uint32_t USART0::getBaudRate()
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{
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uint16_t ui16UBRR;
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ui16UBRR = static_cast<uint16_t>( *m_vui8pUBRRH ) << 8;
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ui16UBRR |= *m_vui8pUBRRL;
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return F_CPU / ( static_cast<uint32_t>( 16 ) * ( ui16UBRR + 1 ) );
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}
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//////////////////////////////////////////////////////////////////////////
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uint8_t USART0::getDataBits()
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{
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if( *m_vui8pUCSRB & ( 1 << UCSZ2_D ) )
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{
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return 9;
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}
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uint8_t ui8UCSRC = readUCSRC();
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bool bZeroBit = ui8UCSRC & ( 1 << UCSZ0_D );
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bool bOneBit = ui8UCSRC & ( 1 << UCSZ1_D );
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return 5 + ( bOneBit << 1 | bZeroBit );
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}
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//////////////////////////////////////////////////////////////////////////
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USART0::Parity USART0::getParity()
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{
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uint8_t ui8UCSRC = readUCSRC();
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bool bZeroBit = ui8UCSRC & ( 1 << UPM0_D );
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bool bOneBit = ui8UCSRC & ( 1 << UPM1_D );
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if( bOneBit && !bZeroBit )
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{
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return Parity::EVEN;
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}
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if( bOneBit && bZeroBit )
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{
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return Parity::ODD;
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}
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return Parity::DISABLED;
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}
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//////////////////////////////////////////////////////////////////////////
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USART0::StopBit USART0::getStopBits()
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{
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uint8_t ui8UCSRC = readUCSRC();
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if( ui8UCSRC & ( 1 << USBS_D ) )
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{
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return StopBit::TWO;
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}
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return StopBit::ONE;
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}
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//////////////////////////////////////////////////////////////////////////
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USART0::~USART0()
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{
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flushTransmit();
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setBaudRate( 0 );
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setRXState( false );
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setTXState( false );
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setRXInterrupt( false );
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setUDREInterrupt( false );
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}
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//////////////////////////////////////////////////////////////////////////
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USART0& USART0::inst()
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{
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return sm_cInstance;
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::init( uint32_t ui32BaudRate /* = 9600 */, uint8_t ui8DataBits /* = 8 */, Parity enmParity /* = Parity::DISABLED */, StopBit enmStopBits /* = StopBit::ONE */, Mode enmMode /* = Mode::ASYNCHRONOUS */ )
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{
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setBaudRate( ui32BaudRate );
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setDataBits( ui8DataBits );
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setParity( enmParity );
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setStopBits( enmStopBits );
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setMode( enmMode );
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setRXState( true );
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setTXState( true );
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setRXInterrupt( true );
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setUDREInterrupt( false );
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}
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//////////////////////////////////////////////////////////////////////////
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bool USART0::receiveByte( uint8_t &ui8Data )
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{
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if( m_vsizeRXBufferHead == m_vsizeRXBufferTail && !( SREG & ( 1 << SREG_I ) ) )
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{
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while( !( *m_vui8pUCSRA & ( 1 << RXC_D ) ) );
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ui8Data = *m_vui8pUDR;
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return true;
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}
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else if( m_vsizeRXBufferHead == m_vsizeRXBufferTail )
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{
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return false;
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}
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ui8Data = m_vui8aRXBuffer[m_vsizeRXBufferTail];
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m_vsizeRXBufferTail = ( m_vsizeRXBufferTail + 1 ) % sm_sizeRXBUFFER_SIZE;
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return true;
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}
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//////////////////////////////////////////////////////////////////////////
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bool USART0::receiveByte( uint8_t &ui8Data, uint16_t ui16TimeoutMS )
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{
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uint16_t ui16DelayCounter = 0;
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while( !receiveByte( ui8Data ) )
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{
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_delay_ms( 1 );
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if( ui16DelayCounter++ > ui16TimeoutMS )
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{
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return false;
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}
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}
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return true;
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}
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//////////////////////////////////////////////////////////////////////////
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uint8_t USART0::receiveByteBlocked()
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{
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uint8_t ui8Received;
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while( !receiveByte( ui8Received ) );
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return ui8Received;
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}
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//////////////////////////////////////////////////////////////////////////
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uint8_t USART0::receivePeek()
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{
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uint8_t ui8Received;
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if( !( SREG & ( 1 << SREG_I ) && m_vsizeRXBufferHead == m_vsizeRXBufferTail ) )
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{
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while( !( *m_vui8pUCSRA & ( 1 << RXC_D ) ) );
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ui8Received = *m_vui8pUDR;
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size_t sizeIndex = ( m_vsizeRXBufferHead + 1 ) % sm_sizeRXBUFFER_SIZE;
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if( sizeIndex != m_vsizeRXBufferTail )
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{
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m_vui8aRXBuffer[m_vsizeRXBufferHead] = ui8Received;
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m_vsizeRXBufferHead = sizeIndex;
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}
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return ui8Received;
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}
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while( m_vsizeRXBufferHead == m_vsizeRXBufferTail );
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return m_vui8aRXBuffer[m_vsizeRXBufferTail];
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}
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//////////////////////////////////////////////////////////////////////////
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bool USART0::receiveLine( char *szBuffer, size_t sizeBufferLength, const char *szLineTerminator /* = "\r\n" */ )
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{
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size_t sizeReceived = 0;
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while( sizeReceived < sizeBufferLength - 1 )
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{
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uint8_t ui8ReceiveByte;
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while( !receiveByte( ui8ReceiveByte ) );
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szBuffer[sizeReceived++] = ui8ReceiveByte;
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szBuffer[sizeReceived] = '\0';
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if( strstr( szBuffer, szLineTerminator ) )
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{
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szBuffer[sizeReceived - strlen( szLineTerminator )] = '\0';
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return true;
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}
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}
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return false;
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}
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//////////////////////////////////////////////////////////////////////////
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bool USART0::receiveLine( char *szBuffer, size_t sizeBufferLength, uint16_t ui16TimeoutMS, const char *szLineTerminator /* = "\r\n" */ )
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{
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size_t sizeReceived = 0;
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while( sizeReceived < sizeBufferLength - 1 )
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{
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uint8_t ui8ReceiveByte;
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uint16_t ui16DelayCounter = 0;
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while( !receiveByte( ui8ReceiveByte ) )
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{
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_delay_ms( 1 );
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if( ui16DelayCounter++ > ui16TimeoutMS )
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{
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szBuffer[sizeReceived] = '\0';
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return false;
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}
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}
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szBuffer[sizeReceived++] = ui8ReceiveByte;
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szBuffer[sizeReceived] = '\0';
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if( strstr( szBuffer, szLineTerminator ) )
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{
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szBuffer[sizeReceived - strlen( szLineTerminator )] = '\0';
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return true;
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}
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}
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return false;
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::flushReceive()
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{
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uint32_t ui32BaudRate = getBaudRate();
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uint8_t ui8BitsPerSymbol = 1;
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ui8BitsPerSymbol += getDataBits();
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if( getParity() != Parity::DISABLED )
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{
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ui8BitsPerSymbol += 1;
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}
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if( getStopBits() == StopBit::ONE )
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{
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ui8BitsPerSymbol += 1;
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}
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else
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{
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ui8BitsPerSymbol += 2;
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}
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uint16_t ui16BaudDelayMS = static_cast<uint16_t>( ( 1000.0 * ui8BitsPerSymbol ) / ui32BaudRate ) + 1;
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uint8_t ui8Received;
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if( !( SREG & ( 1 << SREG_I ) ) )
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{
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while( true )
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{
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for( uint16_t i = 0; i < ui16BaudDelayMS; ++i )
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{
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_delay_ms( 1 );
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}
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if( m_vsizeRXBufferHead != m_vsizeRXBufferTail )
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{
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receiveByte( ui8Received );
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continue;
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}
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if( ( *m_vui8pUCSRA & ( 1 << RXC_D ) ) )
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{
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ui8Received = *m_vui8pUDR;
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continue;
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}
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break;
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}
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}
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else
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{
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while( receiveByte( ui8Received, ui16BaudDelayMS ) );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::transmitByte( uint8_t ui8Data )
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{
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if( m_vsizeTXBufferHead == m_vsizeTXBufferTail && *m_vui8pUCSRA & ( 1 << UDRE_D ) )
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{
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*m_vui8pUDR = ui8Data;
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return;
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}
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size_t sizeIndex = ( m_vsizeTXBufferHead + 1 ) % sm_sizeTXBUFFER_SIZE;
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while( sizeIndex == m_vsizeTXBufferTail )
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{
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if( !( SREG & ( 1 << SREG_I ) ) && *m_vui8pUCSRA & ( 1 << UDRE_D ) )
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{
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transmitInterruptHandler();
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}
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}
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m_vui8aTXBuffer[m_vsizeTXBufferHead] = ui8Data;
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m_vsizeTXBufferHead = sizeIndex;
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if( !( SREG & ( 1 << SREG_I ) ) )
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{
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while( !( *m_vui8pUCSRA & ( 1 << UDRE_D ) ) );
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transmitInterruptHandler();
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}
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else
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{
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setUDREInterrupt( true );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::transmitString( const char *szString )
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{
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while( *szString )
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{
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transmitByte( *szString++ );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void USART0::flushTransmit()
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{
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while( m_vsizeTXBufferHead != m_vsizeTXBufferTail && !( *m_vui8pUCSRA & ( 1 << UDRE_D ) ) );
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}
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|
//////////////////////////////////////////////////////////////////////////
|
|
void USART0::receiveInterruptHandler()
|
|
{
|
|
uint8_t ui8ReceivedByte = *m_vui8pUDR;
|
|
size_t sizeIndex = ( m_vsizeRXBufferHead + 1 ) % sm_sizeRXBUFFER_SIZE;
|
|
|
|
if( sizeIndex != m_vsizeRXBufferTail )
|
|
{
|
|
m_vui8aRXBuffer[m_vsizeRXBufferHead] = ui8ReceivedByte;
|
|
m_vsizeRXBufferHead = sizeIndex;
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
void USART0::transmitInterruptHandler()
|
|
{
|
|
uint8_t ui8TransmitByte = m_vui8aTXBuffer[m_vsizeTXBufferTail];
|
|
m_vsizeTXBufferTail = ( m_vsizeTXBufferTail + 1 ) % sm_sizeTXBUFFER_SIZE;
|
|
|
|
*m_vui8pUDR = ui8TransmitByte;
|
|
|
|
if( m_vsizeTXBufferHead == m_vsizeTXBufferTail )
|
|
{
|
|
setUDREInterrupt( false );
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
ISR( USART0_RX_vect_D )
|
|
{
|
|
USART0::inst().receiveInterruptHandler();
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
ISR( USART0_UDRE_vect_D )
|
|
{
|
|
USART0::inst().transmitInterruptHandler();
|
|
}
|
|
|
|
/************************************************************************/
|
|
/************************************************************************/
|
|
|
|
#ifdef SECOND_USART
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
USART1 USART1::sm_cInstance;
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
USART1& USART1::inst()
|
|
{
|
|
return sm_cInstance;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
USART1::USART1()
|
|
{
|
|
m_vui8pUCSRA = &UCSR1A;
|
|
m_vui8pUCSRB = &UCSR1B;
|
|
m_vui8pUCSRC = &UCSR1C;
|
|
m_vui8pUBRRH = &UBRR1H;
|
|
m_vui8pUBRRL = &UBRR1L;
|
|
m_vui8pUDR = &UDR1;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
ISR( USART1_RX_vect_D )
|
|
{
|
|
USART1::inst().receiveInterruptHandler();
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////
|
|
ISR( USART1_UDRE_vect_D )
|
|
{
|
|
USART1::inst().transmitInterruptHandler();
|
|
}
|
|
|
|
#endif |