#ifndef SPI_H #define SPI_H #define SPI_DDR DDRB #define CS PINB2 #define MOSI PINB3 #define MISO PINB4 #define SCK PINB5 #include "mystd.h" void spi_init(void); void spi_write(uint8_t data); uint8_t spi_read(void); #endif /* SPI_H */