PIC16F723A模拟SPI通讯CS5550-PIC16F723A CS5550 analog SPI communication

1.按下一个按键读写卡中的内容。 2.不需按下按键，当卡靠近读写卡中的内容。(1. Press a button to read and write the contents of the card. 2. Do not press the button when the card is close to the contents of the reading and writing card.)