描述
單片機(jī)系統(tǒng)畢竟資源有限,而利用I2C、SPI通訊接口進(jìn)行擴(kuò)展外設(shè)是最常用的方法,也是非常重要的方法。這兩個(gè)通訊接口都是串行通訊接口,典型的基礎(chǔ)實(shí)驗(yàn)就是I2C的EEPROM實(shí)驗(yàn)與SPI的SD卡讀寫實(shí)驗(yàn)。
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