FMC写信号咋总是跟片选同步呢？

云琴箫龙 · 发表于 2019-7-16 11:41:37

选用的模式1，手册上的WE写信号滞后片选信号ADDSET个HCLK周期，咋实际总是跟片选一起出来，麻烦硬汉哥给瞅瞅是不是哪儿设置错了？逻辑时序.png

/* FMC initialization function */
void MX_FMC_Init(void)
{
  FMC_NORSRAM_TimingTypeDef Timing = {0};
  FMC_SDRAM_TimingTypeDef SdramTiming = {0};

  /** Perform the SRAM1 memory initialization sequence
  */
  hsram1.Instance = FMC_NORSRAM_DEVICE;
  hsram1.Extended = FMC_NORSRAM_EXTENDED_DEVICE;
  /* hsram1.Init */
  hsram1.Init.NSBank = FMC_NORSRAM_BANK1;
  hsram1.Init.DataAddressMux = FMC_DATA_ADDRESS_MUX_DISABLE;
  hsram1.Init.MemoryType = FMC_MEMORY_TYPE_SRAM;
  hsram1.Init.MemoryDataWidth = FMC_NORSRAM_MEM_BUS_WIDTH_8;
  hsram1.Init.BurstAccessMode = FMC_BURST_ACCESS_MODE_DISABLE;
  hsram1.Init.WaitSignalPolarity = FMC_WAIT_SIGNAL_POLARITY_LOW;
  hsram1.Init.WrapMode = FMC_WRAP_MODE_DISABLE;
  hsram1.Init.WaitSignalActive = FMC_WAIT_TIMING_BEFORE_WS;
  hsram1.Init.WriteOperation = FMC_WRITE_OPERATION_ENABLE;
  hsram1.Init.WaitSignal = FMC_WAIT_SIGNAL_DISABLE;
  hsram1.Init.ExtendedMode = FMC_EXTENDED_MODE_DISABLE;
  hsram1.Init.AsynchronousWait = FMC_ASYNCHRONOUS_WAIT_DISABLE;
  hsram1.Init.WriteBurst = FMC_WRITE_BURST_DISABLE;
  hsram1.Init.ContinuousClock = FMC_CONTINUOUS_CLOCK_SYNC_ONLY;
  hsram1.Init.PageSize = FMC_PAGE_SIZE_NONE;
  /* Timing */
  Timing.AddressSetupTime = 3;
  Timing.AddressHoldTime = 2;
  Timing.DataSetupTime = 2;
  Timing.BusTurnAroundDuration = 1;
  Timing.CLKDivision = 3;
  Timing.DataLatency = 3;
  Timing.AccessMode = FMC_ACCESS_MODE_A;

  /* ExtTiming */

  if (HAL_SRAM_Init(&hsram1, &Timing, NULL) != HAL_OK)
  {
Error_Handler( );
  }