STM32F407 FSMC在非复用模式下，开启异步等待，会发生什么情况

只看该作者 · 2018-10-27 16:44

本帖最后由 yzzly 于 2018-10-27 17:17 编辑

STM32F407ZET6系统（168M AHB 时钟）非复用方式扩展一片IS62WV51216BLL-55，不能完全正确读写操作，找原因过程中，错误开启了异步等待模式
FSMC_NORSRAMInitStructure.FSMC_AsynchronousWait = FSMC_AsynchronousWait_Disable; //该语句被改为Enable,

下载运行后，死了，重新上电软件也不再执行，也不能重新下载代码，已经找不到器件

怎么会这样呢？？

void FSMC_Config(void)
{
      FSMC_NORSRAMInitTypeDef  FSMC_NORSRAMInitStructure;
      FSMC_NORSRAMTimingInitTypeDef  p;

      RCC_AHB3PeriphClockCmd(RCC_AHB3Periph_FSMC, ENABLE);

      p.FSMC_AddressSetupTime = 5;
      p.FSMC_AddressHoldTime = 0;
      p.FSMC_DataSetupTime = 12;
   p.FSMC_BusTurnAroundDuration = 0;
   p.FSMC_CLKDivision = 0;
   p.FSMC_DataLatency = 0;
   p.FSMC_AccessMode = FSMC_AccessMode_A;

   FSMC_NORSRAMInitStructure.FSMC_Bank = FSMC_Bank1_NORSRAM3;
   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 = &p;
  FSMC_NORSRAMInitStructure.FSMC_WriteTimingStruct = &p;
  FSMC_NORSRAMInit(&FSMC_NORSRAMInitStructure);

  FSMC_NORSRAMCmd(FSMC_Bank1_NORSRAM3, ENABLE);

}