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This commit is contained in:
Tristan Krause 2019-04-01 15:16:47 +02:00
parent 949591a50d
commit b6d0b4c8f5
29 changed files with 0 additions and 0 deletions
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39
firmware/spi.cpp Normal file
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#include "spi.h"
SPI::SPI(void)
{
}
void SPI::init(void) const
{
// Konfiguriere SPI DDRs
DDRB |= _BV(SLSL) | _BV(MOSI) | _BV(SCLK);
DDRB &= ~_BV(MISO);
// Konfiguriere DMUX DDRs
DDRD |= _BV(DMUX1) | _BV(DMUX2) | _BV(DMUX3);
// aktiviere SPI, Master Modus, SPI Modus 0
// F_SPI = F_CPU / 2 (prescaler 2)
SPCR = _BV(SPE) | _BV(MSTR);
SPSR = _BV(SPI2X);
// waehle keinen SPI Slave aus
setAdr(SPIADR::NONE);
}
void SPI::setAdr(uint8_t adr) const
{
PORTD &= ~(_BV(DMUX1) | _BV(DMUX2) | _BV(DMUX3));
PORTD |= (adr & 0x01) ? _BV(DMUX1) : 0;
PORTD |= (adr & 0x02) ? _BV(DMUX2) : 0;
PORTD |= (adr & 0x04) ? _BV(DMUX3) : 0;
}
uint8_t SPI::pushByte(uint8_t b) const
{
SPDR = b;
while(!(SPSR & _BV(SPIF)));
return SPDR;
}