BSP_QSPI_MemoryMappedMode Enable doesn't work with W25QXX

[aabba.1]

Hi,
I am trying to do a memory map with this board W25QXX and it's not working. For some reason even on the original code we can see the function for BSP_QSPI_MemoryMappedMode have a comment (https://www.waveshare.com/wiki/W25QXX_DataFlash_Board). Any idea why?

I am using this board, with STM32H743IIT the configuration of my QUADSPI is:

[KDJEM.1]

Hello @aabba.1 ,

For some reason even on the original code we can see the function for BSP_QSPI_MemoryMappedMode have a comment (https://www.waveshare.com/wiki/W25QXX_DataFlash_Board). Any idea why?

The shared code isn't supported by ST. But, I noted that the TIMEOUT Counter is enabled in the comment code line, and it mentioned in the STM32F746 errata sheet that Memory-mapped read operations may fail when timeout counter is enabled and the workaround is to disable the timeout counter.

s_mem_mapped_cfg.TimeOutActivation = QSPI_TIMEOUT_COUNTER_ENABLE;

To configure QSPI in memory mapped mode using STM32H743 devices, I advise you to start with an available QSPI_MemoryMapped example in STM32CubeH7 package.

If you using STM32CubeMX toolchain to configure the QUADSPI interface, I recommend you to follow the steps shared in AN4760 precisely section 4. QUADSPI configuration.

Thank you.

Kaouthar

[Tesla DeLorean]

What's the comment? Imagine I can't get to this on my phone, present better.

Make the command template work in direct mode, this maps directly to how the memory mapped read works, a template it stuffs an address field into.

[aabba.1 · Accepted solution]

this should be the implementation:

uint8_t BSP_QSPI_MemoryMappedMode(void)

{

QSPI_CommandTypeDef sCommand;

QSPI_MemoryMappedTypeDef sMemMappedCfg;

/* Enable Memory-Mapped mode-------------------------------------------------- */

sCommand.InstructionMode    = QSPI_INSTRUCTION_1_LINE;

sCommand.Instruction        = QUAD_INOUT_FAST_READ_CMD;

sCommand.AddressSize        = QSPI_ADDRESS_24_BITS;

sCommand.AddressMode        = QSPI_ADDRESS_4_LINES;

sCommand.Address            = 0;

sCommand.AlternateByteMode  = QSPI_ALTERNATE_BYTES_4_LINES;

sCommand.AlternateBytes     = 0xFF;

sCommand.AlternateBytesSize = QSPI_ADDRESS_8_BITS;

sCommand.DdrMode            = QSPI_DDR_MODE_DISABLE;

sCommand.DdrHoldHalfCycle   = QSPI_DDR_HHC_ANALOG_DELAY;

sCommand.SIOOMode           = QSPI_SIOO_INST_EVERY_CMD;

sCommand.DataMode           = QSPI_DATA_4_LINES;

sCommand.NbData             = 0;

sCommand.DummyCycles        = 4;

sMemMappedCfg.TimeOutActivation = QSPI_TIMEOUT_COUNTER_DISABLE;

sMemMappedCfg.TimeOutPeriod = 0;

if (HAL_QSPI_MemoryMapped(&hqspi, &sCommand, &sMemMappedCfg) != HAL_OK) {

return HAL_ERROR;

}

return HAL_OK;

}