Hi @hiro33 ,
Glad to hear 0xEB works on your side, our side mainly use this as the fast read in the QSPI flash.
About 3- or 4-byte address, I think you need to check your QSPI flash chip, in my memory, some QSPI should has one bit to select 3 or 4 bytes address.
To your chip, I think you also need to check your datasheet.
You also can try 0XEC, this is 4 byte address.
Wish it helps you!
Best Regards,
Kerry
Hi Kerry!
Thank you for your answer.
I refer to MIMXRT1064-EVK board.
I use FlexSPI(not FlexSPI2).
Pin
SCK:GPIO_SD_B1_04
CS:GPIO_SD_B0_04
SI/IO0:GPIO_SD_B1_03
SO/IO1:GPIO_SD_B1_02
WP/IO2:GPIO_AD_B1_05
HOLD/IO3:GPIO_AD_B1_04
DQS uses a dummy signal for internal loopback.
I'm running the following code when using FlexSPI.
config->rxSampleClock = kFLEXSPI_ReadSampleClkLoopbackInternally;
QE bit postion
QE bit position changed for S25FL512S,
It is set to bit1 = 1 of the Configuration Register.
#define FLEXSPI_CONFIG_REG_QUAD_SET_VALUE 0x82U //!< Latency Code = 2, QUAD = 1
status_t flexspi_nor_enable_quad_mode2(FLEXSPI_Type *base, flexspi_port_t st_port)
{
flexspi_transfer_t flashXfer;
status_t status;
uint32_t writeValue = 0x0200;
uint32_t configValue;
/*! Read Configuration Register */
flashXfer.deviceAddress = 0;
flashXfer.port = st_port;
flashXfer.cmdType = kFLEXSPI_Read;
flashXfer.SeqNumber = 1;
flashXfer.seqIndex = NOR_CMD_LUT_SEQ_IDX_ENTERQPI; //!< Read Configuration Register (RDCR 35h)
flashXfer.data = &configValue;
flashXfer.dataSize = 1;
status = FLEXSPI_TransferBlocking(FLEXSPI, &flashXfer);
if (status != kStatus_Success)
{
return status;
}
//! QUAD bit set
writeValue = (configValue | FLEXSPI_CONFIG_REG_QUAD_SET_VALUE) << 8;
/* Write enable */
status = flexspi_nor_write_enable(base, 0, st_port); //!< flexspi_nor_write_enable
if (status != kStatus_Success)
{
return status;
}
/* Enable quad mode. */
flashXfer.deviceAddress = 0;
flashXfer.port = st_port;
flashXfer.cmdType = kFLEXSPI_Write;
flashXfer.SeqNumber = 1;
flashXfer.seqIndex = NOR_CMD_LUT_SEQ_IDX_WRITESTATUSREG;
flashXfer.data = &writeValue;
flashXfer.dataSize = 2;
status = FLEXSPI_TransferBlocking(base, &flashXfer);
if (status != kStatus_Success)
{
return status;
}
status = flexspi_nor_wait_bus_busy(base, st_port);
/* Do software reset. */
FLEXSPI_SoftwareReset(base);
return status;
}
Hi Kerry!
To add the FlexSPIn_MCR0[RXCLKSRC] =0 configration, I'm running the following code.
config->rxSampleClock = kFLEXSPI_ReadSampleClkLoopbackInternally;
But it didn't work.
I don't have DQS pins, does the hardware still work?
The connection looks like this.
Hi @hiro33 ,
You connect your QSPI on the FlexSPI B port, do you connect anything on your FlexSPI A port?
When you read the QSPI, which address you are reading?
What's the code you are using?
This code?
SDK_2_10_0_EVK-MIMXRT1064\boards\evkmimxrt1064\driver_examples\flexspi\nor\polling_transfer
And modify the LUT, right?
Do you modify the pinmux.c? You need to define the FLEXSPIB port pins.
Please share your project, I need to check your code.
Eg:
FLEXSPI_SetFlashConfig(base, &deviceconfig, kFLEXSPI_PortA1);
Do you call:
FLEXSPI_SetFlashConfig(base, &deviceconfig, kFLEXSPI_PortB1);
flexspi_nor_flash_init code:
/*Set AHB buffer size for reading data through AHB bus. */
config.ahbConfig.enableAHBPrefetch = true;
config.ahbConfig.enableAHBBufferable = true;
config.ahbConfig.enableReadAddressOpt = true;
config.ahbConfig.enableAHBCachable = true;
config.rxSampleClock = kFLEXSPI_ReadSampleClkLoopbackFromDqsPad;// should be kFLEXSPI_ReadSampleClkLoopbackInternally
FLEXSPI_Init(base, &config);
Just check all the related code, you need to use the B port.
Best Regards,
kerry
Hi @hiro33
I checked your code, and find your pinmux, and the port B is correctly used.
Now, you can do erase, write, just read can't work, please try 0XEB command to read:
/* Fast read quad mode - SDR */
[4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD] =
FLEXSPI_LUT_SEQ(kFLEXSPI_Command_SDR, kFLEXSPI_1PAD, 0xEB, kFLEXSPI_Command_RADDR_SDR, kFLEXSPI_4PAD, 0x18),
[4 * NOR_CMD_LUT_SEQ_IDX_READ_FAST_QUAD + 1] = FLEXSPI_LUT_SEQ(
kFLEXSPI_Command_DUMMY_SDR, kFLEXSPI_4PAD, 0x06, kFLEXSPI_Command_READ_SDR, kFLEXSPI_4PAD, 0x04),
Which is used like the SDK code, whether this command can readout OK or not?
Please try it and test it, then give me feedback.
Best Regards,
Kerry
Hi @hiro33 ,
Glad to hear 0xEB works on your side, our side mainly use this as the fast read in the QSPI flash.
About 3- or 4-byte address, I think you need to check your QSPI flash chip, in my memory, some QSPI should has one bit to select 3 or 4 bytes address.
To your chip, I think you also need to check your datasheet.
You also can try 0XEC, this is 4 byte address.
Wish it helps you!
Best Regards,
Kerry
