54 lines
985 B
C++
54 lines
985 B
C++
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#include "spi.h"
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void spiInit()
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{
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SPCR |= ( 1 << SPE ) | ( 1 << MSTR );
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}
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void spiEnd()
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{
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SPCR = 0;
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SPSR = 0;
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}
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void spiSetClockDiv( SPIClock enmClockDiv )
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{
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bool bSPI2X = ( static_cast<uint8_t>( enmClockDiv ) >> 2 ) & 1;
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bool bSPR1 = ( static_cast<uint8_t>( enmClockDiv ) >> 1 ) & 1;
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bool bSPR0 = ( static_cast<uint8_t>( enmClockDiv ) >> 0 ) & 1;
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SPCR &= ~( 1 << SPR1 | 1 << SPR0 );
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SPSR &= ~( 1 << SPI2X );
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SPCR |= ( bSPR1 << SPR1 | bSPR0 << SPR0 );
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SPSR |= ( bSPI2X << SPI2X );
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}
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void spiSetDataMode( SPIMode enmMode )
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{
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bool bCPOL = ( static_cast<uint8_t>( enmMode ) >> 1 ) & 1;
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bool bCPHA = ( static_cast<uint8_t>( enmMode ) >> 0 ) & 1;
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SPCR &= ~( 1 << CPOL | 1 << CPHA );
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SPCR |= ( bCPOL << CPOL | bCPHA << CPHA );
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}
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void spiSetBitOrder( 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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uint8_t spiTransfer( 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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