RT1061 QSPI Flash configuration

[ofirshe]

Hi,
I’m working on configuring the QSPI flash peripheral for a custom board that uses the Winbond W25Q512NW flash device. This is the same flash chip used in the mimxrt1170_evk_mimxrt1176_cm4_B.overlay.
I’ve created a flexspi_nor_config.c file in my custom board directory, using configurations from other boards (like teensy4 and mm_feather) that share the same SoC family. I’ve adjusted the flash size and clock frequency to match my device. Below is my current configuration:

#include <flexspi_nor_config.h>

#ifdef CONFIG_NXP_IMXRT_BOOT_HEADER
#if defined(__CC_ARM) || defined(__ARMCC_VERSION) || defined(__GNUC__)
__attribute__((section(".boot_hdr.conf")))
#elif defined(__ICCARM__)
#pragma location = ".boot_hdr.conf"
#endif

const struct flexspi_nor_config_t Qspiflash_config = {
	.memConfig = {
		.tag = FLEXSPI_CFG_BLK_TAG,
		.version = FLEXSPI_CFG_BLK_VERSION,
		.readSampleClkSrc =
			kFlexSPIReadSampleClk_LoopbackFromDqsPad,
		.csHoldTime = 3u,
		.csSetupTime = 3u,
		.sflashPadType = kSerialFlash_4Pads,
		.serialClkFreq = kFlexSpiSerialClk_133MHz,
		.sflashA1Size = 64u * 1024u * 1024u,
		.lookupTable = {
			FLEXSPI_LUT_SEQ(CMD_SDR, FLEXSPI_1PAD,
					0xEB, RADDR_SDR,
					FLEXSPI_4PAD, 0x18),
			FLEXSPI_LUT_SEQ(DUMMY_SDR, FLEXSPI_4PAD,
					0x06, READ_SDR,
					FLEXSPI_4PAD, 0x04),
		},
	},
	.pageSize = 256u,
	.sectorSize = 4u * 1024u,
	.blockSize = 256u * 1024u,
	.isUniformBlockSize = false,
};
#endif /* CONFIG_NXP_IMXRT_BOOT_HEADER */

Does this configuration look sufficient for the W25Q512NW flash on my custom board?

Thanks

[DerekSnell]

Hi @ofirshe ,
As you found, W25Q512NW is the same flash device used on the MIMXRT1170-EVKB board. So it would be best to use that board as a reference, and setup the ROM bootloader and FlexSPI the same as that board. The flash files inluded for the MIMXRT1170-EVK board come from this CMakeLists.txt file. This line includes the flash config struct for the ROM bootloader:

    # Include flash configuration block for RT1170 EVK from NXP's HAL.
    # This configuration block may need modification if another flash chip is
    # used on your custom board. See NXP AN12238 for more information.
    zephyr_library_sources(${RT1170_BOARD_DIR}/xip/${RT1170_BOARD_NAME}_flexspi_nor_config.c)

So CMake is including this evkbmimxrt1170_flexspi_nor_config.c from the HAL. Your board should be able to include that same file from the HAL. Or if you want to control that file or make changes to it, you could copy to your board folder.

Best regards

[ofirshe]

Okay @DerekSnell, thank you.