QSPI连续快速读取速度很慢，时钟不太对

永夜衣袂提问时间：2018-5-25 10:00 /

参考论坛一个帖子的配置方法，如下Init QSPI，以及读取时先发送 QSPI_QUAD_INOUT_FAST_READ_4_BYTE_ADDR_CMD，在接手500个字节的数据，可是时钟信号出来如图并不是连续的，然后读取速度就很慢。

QSPI_StaticTypeDef QSPI_UserInit(void)
{
  uint32_t i;
  uint8_t  QspiID[3];
  __IO QSPI_StaticTypeDef  __QspiStatus = QSPI_OUT_TIME;

if(g_isQSPIInit)
{
return QSPI_OK;
}
  g_isQSPIInit = 1;

  QUADSPI_Init();

  __QspiStatus = QSPI_ResetMemory(&hqspi);

if ( __QspiStatus != QSPI_OK)
{
printf("QSPI  reset memory Error  ... ... \r\n");
return QSPI_ERROR;
}

  i = 0x100000;
  while(i --)
  {

  }

QSPI_Read_ID(QSPI_READ_ID_CMD, (uint8_t *) & QspiID[0], 3);
QSPI_AutoPollingMemReady(&hqspi);
QSPI_DummyCyclesCfg(&hqspi);
  _QspiFlashInf.Id = (QspiID[0] << 16) | (QspiID[1] << 8) | QspiID[2];
#ifdef DEBUG
   printf("QSPI_READ_ID =  0x%X\r\n", _QspiFlashInf.Id );
#endif
  __QspiStatus = QSPI_Quad_Enter();

#ifdef DEBUG
  printf("QSPI_UserInit                OK    ... DD \r\n\r\n");
#endif
  return QSPI_OK;
}
void QUADSPI_Init(void)
{

  hqspi.Instance = QUADSPI;

  HAL_QSPI_DeInit(&hqspi);

  hqspi.Init.FifoThreshold = 10;
  hqspi.Init.SampleShifting = QSPI_SAMPLE_SHIFTING_HALFCYCLE;
  hqspi.Init.FlashSize = QSPI_FLASH_SIZE_LINE;

  hqspi.Init.ClockPrescaler = 1;
  hqspi.Init.ChipSelectHighTime = QSPI_CS_HIGH_TIME_4_CYCLE;

  hqspi.Init.ClockMode = QSPI_CLOCK_MODE_3;
  hqspi.Init.FlashID = QSPI_FLASH_ID_1;
  hqspi.Init.DualFlash = QSPI_DUALFLASH_DISABLE;
  if (HAL_QSPI_Init(&hqspi) != HAL_OK)
  {

  }
}

/*
int QSPI_Read(uint8_t* data, uint32_t address, uint32_t size) --Read data from QSPI flash
A function to read data from QSPI flash
Return an integer value (default QSPI_OK), a parameter for data buffer,
a parameter for QSPI memory address, a parameter for data size.
*/

QSPI_StaticTypeDef QSPI_ReadBuff(uint8_t* data, uint32_t address, uint32_t size)
{
  uint32_t  __InstructionMode, __AddressMode, __DataMode;
  uint8_t readBuffer_RegVal = 0;

  if(QSPI_WorkMode) // Work In QUAD Model
  {
__InstructionMode = QSPI_INSTRUCTION_4_LINES;
__AddressMode    = QSPI_ADDRESS_4_LINES;
__DataMode       = QSPI_DATA_4_LINES;
  }
  else
  {
__InstructionMode = QSPI_INSTRUCTION_1_LINE;
__AddressMode    = QSPI_ADDRESS_1_LINE;
__DataMode       = QSPI_DATA_1_LINE;
  }

  if(QSPI_SendCmdData(  QSPI_QUAD_INOUT_FAST_READ_4_BYTE_ADDR_CMD,
                     __InstructionMode,
                     __AddressMode,
                     QSPI_ADDRESS_32_BITS,
                     __DataMode,
                     size,
                     4 ,
                     address,
                     &readBuffer_RegVal,
                     QSPI_SEND_CMD
                  ) != QSPI_OK )
  {
return QSPI_ERROR;
  }

  if(QSPI_Receive(  data,  size) != QSPI_OK)
return  QSPI_ERROR;

  return  QSPI_OK;

}