how to run QSPI ?

[luisfynn1]

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Hi everyone,

I'm trying to interface an ICNA3306 LCD display using STM32's QSPI peripheral. The LCD uses a custom protocol where commands are sent as:

• Instruction: 0x02 (8 bits, 1-wire)
• Address: 0x00, CMD, 0x00 (24 bits, 1-wire)

Expected behavior: 32 clock pulses (8 instruction + 24 address) Actual behavior: Only 8 clock pulses (instruction only - address phase not transmitted)

Here's my code:

HAL_StatusTypeDef ICNA3306_WriteCommand(uint8_t cmd)
{
QSPI_CommandTypeDef sCommand = {0};

sCommand.InstructionMode = QSPI_INSTRUCTION_1_LINE;
sCommand.Instruction = 0x02;

sCommand.AddressMode = QSPI_ADDRESS_1_LINE;
sCommand.AddressSize = QSPI_ADDRESS_24_BITS;
sCommand.Address = (0x00 << 16) | (cmd << ‌‌ | 0x00;

sCommand.AlternateByteMode = QSPI_ALTERNATE_BYTES_NONE;
sCommand.DataMode = QSPI_DATA_NONE;
sCommand.DummyCycles = 0;
sCommand.DdrMode = QSPI_DDR_MODE_DISABLE;
sCommand.SIOOMode = QSPI_SIOO_INST_EVERY_CMD;

return HAL_QSPI_Command(&hqspi, &sCommand, HAL_MAX_DELAY);
}

QSPI Configuration:

hqspi.Init.ClockPrescaler = 13;
hqspi.Init.FifoThreshold = 4;
hqspi.Init.SampleShifting = QSPI_SAMPLE_SHIFTING_HALFCYCLE;
hqspi.Init.FlashSize = 23;
hqspi.Init.ChipSelectHighTime = QSPI_CS_HIGH_TIME_6_CYCLE;
hqspi.Init.ClockMode = QSPI_CLOCK_MODE_0;

Oscilloscope shows:

and then right waveform is below:(make QSPI using GPIO)

[mƎALLEm]

Hello,

I don't see any relation between the title and the request. Could you please clarify?

[luisfynn1]

oh I am sorry.

I fixed it.

[mƎALLEm]

You need also to provide the MCU product part number you are using.

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