SDK 2.8.0: NOR flash driver fixed to DQS loopback

[rshipman]

Hi

Platform: RT1021 with NOR flash on 2nd pinmux and not using DQS.

(Flash device same as RT1020-EVK.)

See function: Nor_Flash_Init

File: nor_flash/fsl_flexspi_nor_flash.c

Lines: 3520 - 3529

    /* Get FLEXSPI default settings and configure the flexspi. */

    FLEXSPI_GetDefaultConfig(&flexspiConfig);

    /*Set AHB buffer size for reading data through AHB bus. */

    flexspiConfig.ahbConfig.enableAHBPrefetch    = true;

    flexspiConfig.ahbConfig.enableAHBBufferable  = true;

    flexspiConfig.ahbConfig.enableReadAddressOpt = true;

    flexspiConfig.ahbConfig.enableAHBCachable    = true;

    flexspiConfig.rxSampleClock                  = kFLEXSPI_ReadSampleClkLoopbackFromDqsPad;

    FLEXSPI_Init((FLEXSPI_Type *)handle->driverBaseAddr, &flexspiConfig);

This FLEXSPI_Init code was added to Nor_Flash_Init in SDK 2.8.0 (used to be called separately in the demo evkmimxrt1020_flash_component_nor). Which means I cannot set flexspiConfig.rxSampleClock to something different.

Please revert this modification.

Many thanks and regards,

Ronnie

[victorjimenez]

Hello Ronnie, 

Could you please specify where did you see that function? In my case, I imported the example flexspi_nor_polling_transfer from SDK 2.8.0 and I checked the function flexspi_nor_flash_init in the file flexspi_nor_flash_ops.c and inside this function, we never call the FLEXSPI_Init function. 

Regards, 

Victor 

[rshipman]

Hi Victor,

Both these demos have the same problem in SDK 2.8.0:

File: evkmimxrt1020_flash_component_nor\nor_flash\fsl_flexspi_nor_flash.c

Function:

status_t Nor_Flash_Init(nor_config_t *config, nor_handle_t *handle)

Lines: 3520 - 3529

(File also found here: SDK_2.8.0_EVK-MIMXRT1020\components\flash\nor\flexspi\fsl_flexspi_nor_flash.c)

File: evkmimxrt1020_flexspi_nor_polling_transfer\source\flexspi_nor_flash_ops.c

Function:

void flexspi_nor_flash_init(FLEXSPI_Type *base)

Lines:  331 - 339

(File also found here: SDK_2.8.0_EVK-MIMXRT1020\boards\evkmimxrt1020\driver_examples\flexspi\nor\polling_transfer\flexspi_nor_flash_ops.c)

Many thanks,

Ronnie

[victorjimenez]

Hi Ronnie, 

I just compared the function void flexspi_nor_flash_init(FLEXSPI_Type *base) of these two SDKs (2.7.0 and 2.7.8) and the function is exactly the same in both cases. Am I missing something? 

Regards, 

Victor