Selecting between CS0 and CS1

[adi2Intel]

Hi all

I am using the example : FlexSPI_nor_polling_transfer to use some SPI features

In the CODE: how do I switch between the default CS0 to CS1 and making the erase and program operation on it ?

where do I need to modify the code??

thanks

Adi , Intel

[jeremyzhou]

Hi @adi2Intel ，
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
It needs you to assign the size range for the specific port during initializing the FlexSPI, then the AHB bus can determine which port to access according to the target address, however, when using the IP bus, you should set the similar information like the below shows manually which includes the port prior to calling the LUT commands.

    flexspi_transfer_t flashXfer;
    flashXfer.deviceAddress = 0;
    flashXfer.port          = kFLEXSPI_PortA1;
    flashXfer.cmdType       = kFLEXSPI_Read;
    flashXfer.SeqNumber     = 1;
    flashXfer.seqIndex      = NOR_CMD_LUT_SEQ_IDX_READID;
    flashXfer.data          = &temp;
    flashXfer.dataSize      = 1;

    status_t status = FLEXSPI_TransferBlocking(base, &flashXfer);

Have a great day,
TIC

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[adi2Intel]

Hi Jeremy

Thank you for your quick reply

I did not understood what exactly to modify?

for example right now we are using :

for reading vendor ID thru CS0

so we need only to change to PortB2?

Adi, Intel

[jay_heng]

Better to use SDK 2.12, then you just need to modify one MACRO in app.h

kFLEXSPI_PortA1 is for A_SS0, kFLEXSPI_PortA2 is for A_SS1

kFLEXSPI_PortB1 is for B_SS0, kFLEXSPI_PortB2 is for B_SS1

[jay_heng · Accepted solution]

There are two places you need to modify (SDK 2.12):

// in pin_mux.c, update it to SS1_B
void BOARD_InitPins(void) {
  CLOCK_EnableClock(kCLOCK_Iomuxc);           

  IOMUXC_SetPinMux(IOMUXC_GPIO_SD_B1_06_FLEXSPI_A_SS0_B, 1U); 
  IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B1_06_FLEXSPI_A_SS0_B, 0x10F1U); 
}

// in app.h, PortA1 is for CS0, PortA2 is for CS1
#define FLASH_PORT                      kFLEXSPI_PortA1