FMC驱动NORFLASH读取ID显示全是0值，读取ID失败

远命 · 发表于 2020-12-19 09:27:45

型号：SST39VF3201B
问题：读取ID失败
/*********************地址******************************/
#define Bank1_NOR1_ADDR//偏移
#define ADDR_SHIFT(A) (Bank1_NOR1_ADDR + (2 * (A)))
#define NOR_WRITE(Address,Data) (*(vu16 *)(Address) = (Data))
#define NOR_READ(ReadAddr) (*(vu16 *)((Bank1_NOR1_ADDR + ReadAddr)))
/*--------------FMC 总线存储器参数配置------------------------------*/
  p.FMC_AddressSetupTime = 7; //地址建立时间
  p.FMC_AddressHoldTime = 0x00; //地址保持时间
  p.FMC_DataSetupTime = 5;    //数据建立时间
  p.FMC_BusTurnAroundDuration = 1; //总线恢复时间x01
  p.FMC_CLKDivision = 0x00;       // 时钟分频因子
  p.FMC_DataLatency = 0x00;       //数据产生时间
  p.FMC_AccessMode = FMC_AccessMode_B; //FMC NOR控制器时序
  FMC_NORSRAMInitStructure.FMC_Bank = FMC_Bank1_NORSRAM1;//使用了FMC的BANK1的子板块1
  FMC_NORSRAMInitStructure.FMC_DataAddressMux = FMC_DataAddressMux_Disable;//禁止地址数据线复用
  FMC_NORSRAMInitStructure.FMC_MemoryType = FMC_MemoryType_NOR;//存储器类型为Nor
  FMC_NORSRAMInitStructure.FMC_MemoryDataWidth = FMC_NORSRAM_MemoryDataWidth_16b;//存储器数据宽度为16位
  FMC_NORSRAMInitStructure.FMC_BurstAccessMode = FMC_BurstAccessMode_Disable;//关闭突发模式访问
  //等待信号优先级，只有在使能突发访问模式才有效
  FMC_NORSRAMInitStructure.FMC_WaitSignalPolarity = FMC_WaitSignalPolarity_Low;
  //关闭Wrapped burst access mode，只有在使能突发访问模式才有效
  FMC_NORSRAMInitStructure.FMC_WrapMode = FMC_WrapMode_Disable;
  //等待信号设置，只有在使能突发访问模式才有效
  FMC_NORSRAMInitStructure.FMC_WaitSignalActive = FMC_WaitSignalActive_BeforeWaitState;
  //使能这个BANK的写操作
  FMC_NORSRAMInitStructure.FMC_WriteOperation = FMC_WriteOperation_Enable;
  //使能/关闭等待信息设置，只在使能突发访问模式才有效
  FMC_NORSRAMInitStructure.FMC_WaitSignal = FMC_WaitSignal_Disable;
  FMC_NORSRAMInitStructure.FMC_ExtendedMode = FMC_ExtendedMode_Disable;//关闭Extend Mode
  //FMC_NORSRAMInitStructure.FMC_AsyncWait = FMC_AsyncWait_Disable;
  FMC_NORSRAMInitStructure.FMC_WriteBurst = FMC_WriteBurst_Disable;//关闭Write Burst Mode
  FMC_NORSRAMInitStructure.FMC_ReadWriteTimingStruct = &p;//读操作时序参数
  FMC_NORSRAMInitStructure.FMC_WriteTimingStruct = &p;//写操作时序参数
  FMC_NORSRAMInit(&FMC_NORSRAMInitStructure);
  /*--------------使能BANK1的子板块1------------------------------*/
  FMC_NORSRAMCmd(FMC_Bank1_NORSRAM1, ENABLE);

//读取ID
void FMC_NOR_ReadID(void)
{
NOR_WRITE(ADDR_SHIFT(0x05555),0x00AA);
NOR_WRITE(ADDR_SHIFT(0x02AAA),0x0055);
NOR_WRITE(ADDR_SHIFT(0x05555),0x0090);
printf("%d %d %d %d\r\n",*(vu16 *)ADDR_SHIFT(0x0000),\
*(vu16 *)ADDR_SHIFT(0x0001),\
*(vu16 *)ADDR_SHIFT(0x000E),\
*(vu16 *)ADDR_SHIFT(0x000F));
}