Unable to use QuadSPI Status Flag Polling Mode with instruction on 4 lines on STM32H753

[JMate.2]

I am having issues getting the status flag polling mode to work when I try to poll with a QuadSPI command that uses all four data lines for the instruction. When using a command with a 4-line instruction in this mode, it polls the first command correctly, but the second command has one fewer clock cycles than expected, and then the chip select never goes high again. I've tried getting this to work with multiple configuration settings, but the common denominator seems to be the 4-line instruction causing the issue.

QSPI_HandleTypeDef hqspi =
{
  .Instance = QUADSPI,
  .Init.ClockPrescaler = 63,
  .Init.FifoThreshold = 1,
  .Init.SampleShifting = QSPI_SAMPLE_SHIFTING_NONE,
  .Init.FlashSize = 1,
  .Init.ChipSelectHighTime = QSPI_CS_HIGH_TIME_1_CYCLE,
  .Init.ClockMode = QSPI_CLOCK_MODE_0,
  .Init.FlashID = QSPI_FLASH_ID_1,
  .Init.DualFlash = QSPI_DUALFLASH_DISABLE,
};
 
QSPI_CommandTypeDef qspiCmd =
{
  .Instruction = 0x05,
  .Address = 0x00000000,
  .AlternateBytes = 0x00000000,
  .AddressSize = QSPI_ADDRESS_24_BITS,
  .AlternateBytesSize = QSPI_ALTERNATE_BYTES_8_BITS,
  .DummyCycles = 0,
  .InstructionMode = QSPI_INSTRUCTION_4_LINES,
  .AddressMode = QSPI_ADDRESS_NONE,
  .AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE,
  .DataMode = QSPI_DATA_4_LINES,
  .NbData = 1,
  .DdrMode = QSPI_DDR_MODE_DISABLE,
  .DdrHoldHalfCycle = QSPI_DDR_HHC_ANALOG_DELAY,
  .SIOOMode = QSPI_SIOO_INST_EVERY_CMD,
};
 
QSPI_AutoPollingTypeDef autoPollCfg =
{
  .Match = 0x12345678, // Don't match, continue polling indefinitely
  .Mask = 0xFFFFFFFF,
  .Interval = 1,
  .StatusBytesSize = 1,
  .MatchMode = QSPI_MATCH_MODE_AND,
  .AutomaticStop = QSPI_AUTOMATIC_STOP_DISABLE,
};
 
HAL_QSPI_Init(&hqspi);
HAL_QSPI_AutoPolling(&hqspi, &qspiCmd, &autoPollCfg, HAL_MAX_DELAY);

The above code produces the following output:

(Ignore the actual data being read)

Changing only the number of instruction lines seems to produce correct polling:

.InstructionMode = QSPI_INSTRUCTION_1_LINE,

 

.InstructionMode = QSPI_INSTRUCTION_2_LINES,

 

[ChahinezC]

Hello @JMate.2​,

Welcome to STM32 community. I am aware of the internal ticket regarding the issue you are facing, it is getting investigated.

Thank you.

Chahinez.

[ChahinezC · Accepted solution]

Hi @JMate.2​,

Actually, it is not possible to send any commands in Quad mode while not setting the enter Quad mode command.

Please refer to the command set table of the memory datasheet.

Chahinez.

[Tesla DeLorean]

Seem to have been several cases of odd behaviour reported. It could I suppose have to do with a mismatch between what mode the memory IC thinks it's in vs the MCU

I will note, that absent a match the process will continue until actually Aborted, and there are several library versions just exit on timeout, and don't clean up the mess they left. Subsequent code then also fails.

I would generally avoid the Auto-Polling methods, they don't work properly on Micron multi-die / stacked-die memories