AVR ATmega48 SPI最簡單測試碼！

透過spi_data[x]陣列寫入想要傳送的資料，

而x則是控制傳送第x筆數，而接腳輸出則在PortB的預設接腳內，只要修改spi_data就可以透過示波器看到SPI的信號了！-AVR ATmega48 SPI test the most simple code! Through spi_data [x] array you want to send the information to write, and x is the control of transmission of the first x amounts, while the output pin in the PORTB pin within the default, as long as the modified spi_data can see through the oscilloscope SPI the signal!