W25Q cannot read ID

[lagzilajcsi]

Hello!

I have a W25Q128JVIQ connected to an STM32F446RE like the following:

I am trying to use QuadSPI in Dual Mode, but I am having difficulties reading ANY data, like the Device ID (ABh). This is my code: 

W25Q_STATE W25Q_ReadID(u8_t *buf)
{
    QSPI_CommandTypeDef com;

    com.InstructionMode = QSPI_INSTRUCTION_1_LINE; // QSPI_INSTRUCTION_...
    com.Instruction = W25Q_FULLID_DUAL_IO;         // Command

    com.AddressMode = QSPI_ADDRESS_1_LINE;
    com.AddressSize = QSPI_ADDRESS_24_BITS;
    com.Address = 0x0U;

    com.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
    com.AlternateBytes = QSPI_ALTERNATE_BYTES_NONE;
    com.AlternateBytesSize = QSPI_ALTERNATE_BYTES_NONE;

    com.DummyCycles = 0;
    com.DataMode = QSPI_DATA_1_LINE;
    com.NbData = 1;

    com.DdrMode = QSPI_DDR_MODE_DISABLE;
    com.DdrHoldHalfCycle = QSPI_DDR_HHC_ANALOG_DELAY;
    com.SIOOMode = QSPI_SIOO_INST_EVERY_CMD;

    if (HAL_QSPI_Command(&hqspi, &com, HAL_QSPI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
    {
        return W25Q_SPI_ERR;
    }
    if (HAL_QSPI_Receive(&hqspi, buf, HAL_QSPI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
    {
        return W25Q_SPI_ERR;
    }
    return W25Q_OK;
}

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I also tried to read instruction 92h with datamode and address mode set to DATA_2_LINES, but it returns the same.

I am pretty sure, this is not the ID, it should return 23 or 238 according to the datasheet. I tried everything I could think of. Here is my QUADSPI init:

hqspi.Instance = QUADSPI;
  hqspi.Init.ClockPrescaler = 0;
  hqspi.Init.FifoThreshold = 4;
  hqspi.Init.SampleShifting = QSPI_SAMPLE_SHIFTING_HALFCYCLE;
  hqspi.Init.FlashSize = 23;
  hqspi.Init.ChipSelectHighTime = QSPI_CS_HIGH_TIME_2_CYCLE;
  hqspi.Init.ClockMode = QSPI_CLOCK_MODE_0;
  hqspi.Init.FlashID = QSPI_FLASH_ID_1;
  hqspi.Init.DualFlash = QSPI_DUALFLASH_DISABLE;

I would really appreciate some help! thanks

[lagzilajcsi]

I also tried setting dummy cycle to 3, but the results stay the same

[Pavel A.]

com.Instruction = W25Q_FULLID_DUAL_IO;         // Command

com.DataMode = QSPI_DATA_1_LINE;

Really?

[Tesla DeLorean]

Perhaps stop random shot-gun coding.. 

0x9F would be 1-bit command (x8), and 1-bit data (x24), no address or dummy bits. Returning 0xEF,0x40,0x17  (239, 64, 23)

If that doesn't work evaluate what exactly you've wired and configured. 

Try with hqspi.Init.ClockPrescaler = 10; so as not to be maximally clocking

0xAB would need 3 dummy bytes (24 clocks), or 3-byte address of non-consequential content.

Inspect signals with a scope or logic analyzer

Show pin configuration code

[lagzilajcsi]

I managed to make it work!

My code:

W25Q_STATE W25Q_Init(void)
{
    W25Q_STATE state; // temp status variable

    // read id
    u8_t id;
    state = W25Q_ReadID(&id);
    if (state != W25Q_OK)
        return state;

    u8_t id_full[3];

    // state = W25Q_ReadID(id_full);
    state = W25Q_ReadFullID(id_full);
}

W25Q_STATE W25Q_ReadID(u8_t *buf)
{
    QSPI_CommandTypeDef com;

    com.InstructionMode = QSPI_INSTRUCTION_1_LINE; // QSPI_INSTRUCTION_...
    com.Instruction = W25Q_DEVID;                  // Command 0xAB

    com.AddressMode = QSPI_ADDRESS_NONE;
    com.AddressSize = QSPI_ADDRESS_NONE;
    com.Address = 0x0U;

    com.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
    com.AlternateBytes = QSPI_ALTERNATE_BYTES_NONE;
    com.AlternateBytesSize = QSPI_ALTERNATE_BYTES_NONE;

    com.DummyCycles = 0;
    com.DataMode = QSPI_DATA_1_LINE;
    com.NbData = 1;

    com.DdrMode = QSPI_DDR_MODE_DISABLE;
    com.DdrHoldHalfCycle = QSPI_DDR_HHC_ANALOG_DELAY;
    com.SIOOMode = QSPI_SIOO_INST_EVERY_CMD;

    if (HAL_QSPI_Command(&hqspi, &com, HAL_QSPI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
    {
        return W25Q_SPI_ERR;
    }
    if (HAL_QSPI_Receive(&hqspi, buf, HAL_QSPI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
    {
        return W25Q_SPI_ERR;
    }
    return W25Q_OK;
}

W25Q_STATE W25Q_ReadFullID(u8_t *buf)
{
    QSPI_CommandTypeDef com;

    com.InstructionMode = QSPI_INSTRUCTION_1_LINE; // QSPI_INSTRUCTION_...
    com.Instruction = W25Q_FULLID_DUAL_IO;         // Command 0x92

    com.AddressMode = QSPI_ADDRESS_2_LINES;
    com.AddressSize = QSPI_ADDRESS_24_BITS;
    com.Address = 0x0U;

    com.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
    com.AlternateBytes = QSPI_ALTERNATE_BYTES_NONE;
    com.AlternateBytesSize = QSPI_ALTERNATE_BYTES_NONE;

    com.DummyCycles = 0;
    com.DataMode = QSPI_DATA_2_LINES;
    com.NbData = 3;

    com.DdrMode = QSPI_DDR_MODE_DISABLE;
    com.DdrHoldHalfCycle = QSPI_DDR_HHC_ANALOG_DELAY;
    com.SIOOMode = QSPI_SIOO_INST_EVERY_CMD;

    if (HAL_QSPI_Command(&hqspi, &com, HAL_QSPI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
    {
        return W25Q_SPI_ERR;
    }
    if (HAL_QSPI_Receive(&hqspi, buf, HAL_QSPI_TIMEOUT_DEFAULT_VALUE) != HAL_OK)
    {
        return W25Q_SPI_ERR;
    }
    return W25Q_OK;
}

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If i call the readID twice, the second time it returns 255, because the chip is already awake. First time it returns 0. Afterwards, I call the readFullID, and it returns this:

Why is the first index 0? according to the datasheet, it should not be there. Could you help me understand this?