172 lines
3.3 KiB
C++
172 lines
3.3 KiB
C++
#include "spi.h"
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//////////////////////////////////////////////////////////////////////////
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InOutPin SPI::sm_cSCK;
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InOutPin SPI::sm_cMISO;
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InOutPin SPI::sm_cMOSI;
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InOutPin SPI::sm_cSS;
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//////////////////////////////////////////////////////////////////////////
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void SPI::setCPOL( bool bCPOL )
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{
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if( bCPOL )
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{
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SPCR |= ( 1 << CPOL );
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}
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else
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{
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SPCR &= ~( 1 << CPOL );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void SPI::setCPHA( bool bCPHA )
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{
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if( bCPHA )
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{
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SPCR |= ( 1 << CPHA );
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}
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else
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{
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SPCR &= ~( 1 << CPHA );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void SPI::init( ClockDiv enmClockDiv /* = ClockDiv::CLKDIV_128 */, Mode enmMode /* = Mode::MODE_0 */, bool bMaster /* = true */, bool bLSBFirst /* = false */ )
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{
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sm_cSCK.setPin( sm_enmSCK );
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sm_cMISO.setPin( sm_enmMISO );
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sm_cMOSI.setPin( sm_enmMOSI );
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sm_cSS.setPin( sm_enmSS );
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if( bMaster )
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{
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sm_cSS.write( true );
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sm_cSCK.setDirection( InOut::Dir::D_OUT, false );
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sm_cMISO.setDirection( InOut::Dir::D_IN, false );
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sm_cMOSI.setDirection( InOut::Dir::D_OUT, false );
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sm_cSS.setDirection( InOut::Dir::D_OUT, false );
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}
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else
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{
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sm_cSCK.setDirection( InOut::Dir::D_IN, false );
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sm_cMISO.setDirection( InOut::Dir::D_OUT, false );
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sm_cMOSI.setDirection( InOut::Dir::D_IN, false );
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sm_cSS.setDirection( InOut::Dir::D_IN, true );
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}
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setClockDiv( enmClockDiv );
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setMode( enmMode );
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setMaster( bMaster );
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setBitOrder( bLSBFirst );
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SPCR |= ( 1 << SPE );
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}
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//////////////////////////////////////////////////////////////////////////
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void SPI::deinit()
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{
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SPCR = 0;
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sm_cSCK.setDirection( InOut::Dir::D_IN, false );
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sm_cMISO.setDirection( InOut::Dir::D_IN, false );
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sm_cMOSI.setDirection( InOut::Dir::D_IN, false );
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sm_cSS.setDirection( InOut::Dir::D_IN, false );
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}
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//////////////////////////////////////////////////////////////////////////
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void SPI::setClockDiv( ClockDiv enmClockDiv )
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{
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uint8_t ui8ClockDiv = static_cast<uint8_t>( enmClockDiv );
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if( ui8ClockDiv & 1 )
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{
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SPCR |= ( 1 << SPR0 );
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}
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else
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{
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SPCR &= ~( 1 << SPR0 );
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}
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if( ui8ClockDiv & ( 1 << 1 ) )
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{
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SPCR |= ( 1 << SPR1 );
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}
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else
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{
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SPCR &= ~( 1 << SPR1 );
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}
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if( ui8ClockDiv & ( 1 << 2 ) )
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{
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SPSR |= ( 1 << SPI2X );
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}
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else
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{
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SPSR &= ~( 1 << SPI2X );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void SPI::setMode( Mode enmMode )
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{
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if( enmMode == Mode::MODE_0 || enmMode == Mode::MODE_1 )
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{
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setCPOL( false );
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}
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else
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{
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setCPOL( true );
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}
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if( enmMode == Mode::MODE_0 || enmMode == Mode::MODE_2 )
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{
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setCPHA( false );
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}
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else
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{
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setCPHA( true );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void SPI::setMaster( bool bMaster )
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{
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if( bMaster )
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{
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SPCR |= ( 1 << MSTR );
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}
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else
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{
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SPCR &= ~( 1 << MSTR );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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void SPI::setBitOrder( bool bLSBFirst )
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{
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if( bLSBFirst )
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{
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SPCR |= ( 1 << DORD );
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}
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else
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{
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SPCR &= ~( 1 << DORD );
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}
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}
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//////////////////////////////////////////////////////////////////////////
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uint8_t SPI::transfer( uint8_t ui8Data )
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{
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SPDR = ui8Data;
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while( !( SPSR & ( 1 << SPIF ) ) );
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return SPDR;
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}
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//////////////////////////////////////////////////////////////////////////
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void SPI::select( bool bSelect )
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{
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sm_cSS.write( !bSelect );
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} |