#ifndef SPI_H #define SPI_H #include #include "bitwise.h" #define DO_PIN PB1 #define USCK_PIN PB2 inline void initializeSPI() { DDRB |= BV(DO_PIN) | BV(USCK_PIN); // set pin directions for MOSI and SCK } void sendByteOnSPI(uint8_t byte); #endif