[WizFi210] SPI Interface 문의
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RE: [WizFi210] SPI Interface 문의
by ssekim ·
수동적으로 동작하는 SPI Device와는 달리 WizFi210이 SPI Slave로 동작할 때에는 SPI Master로부터 CS(& Clock)을 받지 못한 상태에서도 SPI Master에게 데이터를 전달해야 하는 상황이 있습니다.
이 때, WizFi210은 이 GPIO를 이용하여 SPI Master(Host)에게 "보낼 데이터가 있으니, 나에게 CS를 달라"라는 의미로 GPIO에 신호를 보내게 됩니다.
자세한 내용은 WizFi210 SPI 구현 소스를 참조하시면 됩니다.