SPI lib for atmega168. DON USE Wrk? UNOS

void spi_init(void)

{

/* Set MOSI and SCK output */

DDR_SPI |= _BV(DD_MOSI) | _BV(DD_SCK)

DDR_SPI &= ~_BV(DD_MISO)



/* Enable SPI, Master, set clock rate fck/128 */

SPCR = _BV(SPE) | _BV(MSTR) | _BV(SPR0) | _BV(SPR1)

SPSR = _BV(SPI2X)

}



uint8_t spi_send_receive_byte(uint8_t byte)

{

/* Start transmission */

SPDR = byte



/* Wait for transmission complete */

while (!(SPSR & _BV(SPIF)))



/* Read the received byte */

byte = SPDR



return byte

}-SPI lib for atmega168. DON USE Wrk? UNOS

void spi_init(void)

{

　/* Set MOSI and SCK output */

　DDR_SPI |= _BV(DD_MOSI) | _BV(DD_SCK)

　DDR_SPI &= ~_BV(DD_MISO)



　/* Enable SPI, Master, set clock rate fck/128 */

　SPCR = _BV(SPE) | _BV(MSTR) | _BV(SPR0) | _BV(SPR1)

　SPSR = _BV(SPI2X)

}



uint8_t spi_send_receive_byte(uint8_t byte)

{

　/* Start transmission */

　SPDR = byte



　/* Wait for transmission complete */

　while (!(SPSR & _BV(SPIF)))



　/* Read the received byte */

　byte = SPDR



　return byte

}