Hi
continue this topic : Re: Read Id using flex SPI on QPI mode - NXP Community
and with this FLASH device : W25Q128FV pdf, W25Q128FV Description, W25Q128FV Datasheet, W25Q128FV view ::: ALLDATASHEET :::
and with modified code for the SDK example : flexspi_nor_polling_transfer
all single SPI operations works perfect
we are trying to use operations on QPI mode
lets focus on 2 operations: Reading Jedec ID and Program Page
the enable bit on status register is set.
the LUT entry for enabling QPI mode:
[4 * NOR_CMD_LUT_SEQ_IDX_ENTERQPI] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0x38, kFLEXSPI_Command_STOP, kFLEXSPI_1PAD, 0)
and the code :
status_t flexspi_nor_enable_qpi_mode(FLEXSPI_Type *base)
{
/* Write enable */
status_t status;
flexspi_transfer_t flashXfer;
status = flexspi_nor_write_enable(base, 0);
if (status != kStatus_Success)
{
return status;
}
flashXfer.deviceAddress = 0;
flashXfer.port = FLASH_PORT;
flashXfer.cmdType = kFLEXSPI_Command;
flashXfer.SeqNumber = 1;
flashXfer.seqIndex = NOR_CMD_LUT_SEQ_IDX_ENTERQPI;
status = FLEXSPI_TransferBlocking(base, &flashXfer);
if (status != kStatus_Success)
{
return status;
}
//status = flexspi_nor_wait_bus_busy(base);
/* Do software reset. */
FLEXSPI_SoftwareReset(base);
return status;
}
the busy wait is commented because it stucks\hangs\deadlock.
as for Jedec ID, the entry is this:
/* Read ID */
[4 * NOR_CMD_LUT_SEQ_IDX_READID] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_4PAD , 0x9F, kFLEXSPI_Command_READ_SDR, kFLEXSPI_4PAD , 0x04)
and the result, after entering QPI mode, is 0x1940ff
the result on Single SPI is 0x1940ef and this is the correct one, with this LUT:
[4 * NOR_CMD_LUT_SEQ_IDX_READID] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD , 0x9F, kFLEXSPI_Command_READ_SDR, kFLEXSPI_1PAD , 0x04)
2.now we have issue with programming.
using this:
[4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_SINGLE] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_4PAD, 0x02, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_4PAD, 0x20),
[4 * NOR_CMD_LUT_SEQ_IDX_PAGEPROGRAM_SINGLE + 1] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_WRITE_SDR, kFLEXSPI_4PAD, 0x20, kFLEXSPI_Command_STOP, kFLEXSPI_4PAD, 0),
only the first programming command works, after setting 4 byte mode and entering QPI mode.
so I can only program a single page in one run. strange. what is missing? maybe the stop command is not valid?
it actually stuck on busy wait and I need to remove the busy wait command. could it be related?
from spec:
EDIT : programming issue solved. only JedecID issue left
Thanks
Adi
Intel
Here is a logic analyzer sniff from read ID command :
without drawings:
notice the issue in the manufacture ID that should be EF:
so there is an ussue on clock cycle 2
