FSMC控制问题求助

yuanhe249 · 发表于 2014-1-27 10:16:24

最近我在用stm32f103zct6的FSMC控制一个存储器，地址是A0~A13，数据是D0~D16,下面是初始化程序，我想是不是我初始化FSMC后我就能读里面的数据了？怎么在软件上看里面的数据呢？我用的是NE4，地址是0x6C000000
void FSMC_SRAM_Init(void)
{
   FSMC_NORSRAMInitTypeDef FSMC_NORSRAMInitStructure;
   FSMC_NORSRAMTimingInitTypeDef readWriteTiming;
   GPIO_InitTypeDef GPIO_InitStructure;

     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_GPIOE|RCC_APB2Periph_GPIOF|RCC_APB2Periph_GPIOG,ENABLE);
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_FSMC,ENABLE);

    GPIO_InitStructure.GPIO_Pin = 0xFF33;                  //PORTD复用推挽输出
     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;         //复用推挽输出
     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
     GPIO_Init(GPIOD, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = 0xFF83;                  //PORTE复用推挽输出
     GPIO_Init(GPIOE, &GPIO_InitStructure);

     GPIO_InitStructure.GPIO_Pin = 0xF03F;                  //PORTF复用推挽输出
     GPIO_Init(GPIOF, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = 0x043F;                  //PORTG复用推挽输出
     GPIO_Init(GPIOG, &GPIO_InitStructure);


     readWriteTiming.FSMC_AddressSetupTime = 0x00;    //地址建立时间（ADDSET）为1个HCLK 1/36M=27ns
    readWriteTiming.FSMC_AddressHoldTime = 0x00;    //地址保持时间（ADDHLD）模式A未用到
    readWriteTiming.FSMC_DataSetupTime = 0x03;        //数据保持时间（DATAST）为3个HCLK 4/72M=55ns(对EM的SRAM芯片)
    readWriteTiming.FSMC_BusTurnAroundDuration = 0x00;
    readWriteTiming.FSMC_CLKDivision = 0x00;
    readWriteTiming.FSMC_DataLatency = 0x00;
    readWriteTiming.FSMC_AccessMode = FSMC_AccessMode_A;    //模式A


    FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM4;//这里我们使用NE4 起始地址从6C000000H开始
    FSMC_NORSRAMInitStructure.FSMC_DataAddressMux = FSMC_DataAddressMux_Disable;
    FSMC_NORSRAMInitStructure.FSMC_MemoryType =FSMC_MemoryType_SRAM;// FSMC_MemoryType_SRAM; //SRAM
    FSMC_NORSRAMInitStructure.FSMC_MemoryDataWidth = FSMC_MemoryDataWidth_16b;//存储器数据宽度为16bit 也就对应BCR[4],[5]。
    FSMC_NORSRAMInitStructure.FSMC_BurstAccessMode =FSMC_BurstAccessMode_Disable;// FSMC_BurstAccessMode_Disable;
    FSMC_NORSRAMInitStructure.FSMC_WaitSignalPolarity = FSMC_WaitSignalPolarity_Low;
    FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait=FSMC_AsynchronousWait_Disable;
    FSMC_NORSRAMInitStructure.FSMC_WrapMode = FSMC_WrapMode_Disable;
    FSMC_NORSRAMInitStructure.FSMC_WaitSignalActive = FSMC_WaitSignalActive_BeforeWaitState;
    FSMC_NORSRAMInitStructure.FSMC_WriteOperation = FSMC_WriteOperation_Enable;    //存储器写使能
    FSMC_NORSRAMInitStructure.FSMC_WaitSignal = FSMC_WaitSignal_Disable;
    FSMC_NORSRAMInitStructure.FSMC_ExtendedMode = FSMC_ExtendedMode_Disable; // 读写使用相同的时序
    FSMC_NORSRAMInitStructure.FSMC_WriteBurst = FSMC_WriteBurst_Disable;
    FSMC_NORSRAMInitStructure.FSMC_ReadWriteTimingStruct = &readWriteTiming;
    FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &readWriteTiming; //读写同样时序

    FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure); //初始化FSMC配置

       FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM4, ENABLE); // 使能BANK4

}