QSPI连续快速读取速度很慢，时钟不太对
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_tQspiID;
__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("QSPIreset memory Error... ... \r\n");
return QSPI_ERROR;
}
i = 0x100000;
while(i --)
{
}
QSPI_Read_ID(QSPI_READ_ID_CMD, (uint8_t *) & QspiID, 3);
QSPI_AutoPollingMemReady(&hqspi);
QSPI_DummyCyclesCfg(&hqspi);
_QspiFlashInf.Id = (QspiID << 16) | (QspiID << 8) | QspiID;
#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)
returnQSPI_ERROR;
returnQSPI_OK;
}
自顶，求助，各位大佬有没有用过QSPI的探讨下，用正点原子的源码，时钟波形也是这么断续的，看不出来QSPI连续读取的样子 要么你修改读取代码里的参数，看看有什么变化 你用CUBEMX生成一个例程看看,或者看看我们的例程代码,对比一下.你这个只能自己调试进去看看,实在不行,DMA模式,QSPI高速时,轮训模式是跟不上的
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