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Re: SPI MODE-00 & ENC28J60 溝通問題
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新會員
 
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各位前輩,不好意思,是我忘了設BANK了...............
發表於: 2006/4/25 14:10
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SPI MODE-00 & ENC28J60 溝通問題
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新會員
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原本SPI模式設成(是照手冊SPI時序圖設的)
BCF SSPCON, CKP BSF SSPSTAT, CKE時, 在讀寫ETH Group register, MAC Group register及MII Group register時, 都屬正常 在讀寫PHY register 時, 卻讀寫不進去!!! 也有按照手冊上的順序與時序去驅動如下: READING PHY REGISTER 1.把想要讀的PHY位址寫入MIREGADR register 2.設定MICMD.MIIRD bit, 讀取動作時MISTAT.BUSY bit會自設1 3.等待10.24us,MISTAT.BUSY會自設0 4.清除MICMD.MIIRD bit 5.從MIRDL & MIRDH register 中讀出資料 WRITING PHY REGISTER 1.把想要寫的PHY位址寫入MIREGADR register 2.寫LOW BYTE 到MIWRL register 3.寫HIGI BYTE 到MIWRH register 4.步驟2及3要間隔10.24us 後來將SPI MODE 00(我想應該是這樣設的吧) 設成 BCF SSPCON, CKP BCF SSPSTAT, CKE時, 在讀寫ETH Group register, MAC Group register及MII Group register時, 就都不正常了 在讀寫PHY register 時, 讀出來的都是同一個値!!! (不管寫進PHY register是設什麼值!!!) 也有按照手冊上的順序與時序去驅動. 想請各位前輩能否協助我找出問題,謝謝! 事成之後,一定三牲酒禮伺候.............. 
發表於: 2006/4/25 11:14
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