FSMC方式访问DM9000以太网芯片

youk110 · 发表于 2016-3-28 09:25:17

求助：采用正点原子的例子，FSMC方式访问DM9000以太网芯片时，读取DM9000的ID号总是读取0x2b2a2928,就是读取的是ID寄存器的地址而不是寄存器的内容？是FMSC配置不正确还是其它问题啊？找了半天没找出问题？求各位解答下！typedef struct{
uint16_t REG;
uint16_t DATA;
}DM9000_TypeDef;

#define DM9000_BASE ((u32)(0x6C100006))
#define DM9000 ((DM9000_TypeDef *) DM9000_BASE)

ReadWriteTiming.FSMC_AddressSetupTime = 0; //μØÖ·½¨á￠ê±¼ä
ReadWriteTiming.FSMC_AddressHoldTime = 0;
ReadWriteTiming.FSMC_DataSetupTime = 3; //êy¾Y½¨á￠ê±¼ä
ReadWriteTiming.FSMC_BusTurnAroundDuration = 0x00;
ReadWriteTiming.FSMC_CLKDivision = 0x00;
ReadWriteTiming.FSMC_DataLatency = 0x00;
ReadWriteTiming.FSMC_AccessMode = FSMC_AccessMode_A;//ê1óÃÄ￡ê½A

FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM4; //NE4
FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
FSMC_NORSRAMInitStructure.FSMC_MemoryType = FSMC_MemoryType_SRAM;
FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;
FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode = FSMC_BurstAccessMode_Disable;
FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait = FSMC_AsynchronousWait_Disable;
FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;
FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable;
FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &ReadWriteTiming;
FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &ReadWriteTiming;
FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);
FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM4,ENABLE); //ê1ÄüFSMCμÄBank1_Bank1_NORSRAM4