According to operating system course teaching request, we will analyze the source code in WRK and write an analysis report. The report can be used by teachers who are teaching operating system courses for undergraduates as implementation examples for

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) | _B