how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

sleeper — Wed, 28 Jun 2023 08:53:27 GMT

Hi Alikhan

i'm struggling with the same issue as you. Could you share your overlay that worked for W25q32 ?

Thanks

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Thu, 13 Apr 2023 13:20:10 GMT

i have configured it, yes you were right i wasn't using the pinctrl function as i was thinking it is pre defined, Thank you Nordic community.

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

Menon — Thu, 13 Apr 2023 13:02:31 GMT

Hello,

While looking at your project file, I guess you have configured the device improperly in the overlay file. You haven't mentioned the SPI pins in the overlay and have only declared the CS pin there.

Please refer to this sample in the SDK there you can see how you can configure the overlay file properly.

You can find the overlay file under: C:\ncs\v2.2.0\nrf\samples\bluetooth\central_nfc_pairing

Kind Regards,

Abhijith

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Mon, 10 Apr 2023 04:10:43 GMT

devzone.nordicsemi.com/.../5758.spi_5F00_flash.zip

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Sun, 09 Apr 2023 19:13:59 GMT

this is my overlay file it's building perfectly but i my board is not visible

/ {
    aliases {
        spi-flash0 = &w25q32jv;
    };
};

&spi1 {
    
    compatible = "nordic,nrf-spim";
	status = "okay";
	
	cs-gpios = 	< &gpio0 4 GPIO_ACTIVE_LOW>;
	
	w25q32jv:w25q32jv@0 {
		compatible = "jedec,spi-nor";
		status = "okay";
		//label = "W25Q";
		spi-max-frequency = <8000000>;
		reg = <0>;
        jedec-id = [EF 40 16]; 
		size = <4194304>;
		/*sfdp-bfp = [
			e5 20 fb ff  ff ff ff 3f  44 eb 08 6b  08 3b 04 bb
			fe ff ff ff  ff ff 00 ff  ff ff 44 eb  0c 20 0f 52
			10 d8 00 ff  d6 49 c5 00  82 df 04 e3  44 03 67 38
			30 b0 30 b0  f7 bd d5 5c  4a 9e 29 ff  f0 50 f9 85
		];*/
	};
};

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

Menon — Fri, 31 Mar 2023 12:34:05 GMT

Hello,

I am not sure with the configuration you are following because I haven't worked with this external flash and I can't test this here. But have you configured your Chip select pin properly in the overlay file?

Can you share the project? I will try to build it here. Please attach the Zip file using insert tab.

Kind Regards,

Abhijith

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Tue, 28 Mar 2023 09:01:09 GMT

can you help me out i'm stuck

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Tue, 28 Mar 2023 06:14:28 GMT

any help?

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Fri, 24 Mar 2023 11:02:23 GMT

but now i'm getting this error

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Fri, 24 Mar 2023 11:01:37 GMT

here is my new updated overlay file

spi_flash0:&spi2
{
    compatible = "nordic,nrf-spim";
    pinctrl-0 = <&spi2_default_alt>;
    pinctrl-1 = <&spi2_sleep_alt>;
    pinctrl-names = "default", "sleep";
    status = "okay";
    // cs-gpios = <&gpio0 31 GPIO_ACTIVE_LOW>;
};
spi2_default_alt: spi2_default_alt {
    group1 {
        psels = <NRF_PSEL(SPIM_MOSI, 0, 9)>,
               <NRF_PSEL(SPIM_SCK, 0, 8)>,
                <NRF_PSEL(SPIM_MISO, 0, 10)>;
    };
    // group2 {
    //  psels = <NRF_PSEL(SPIM_MISO, 0, 7)>;
    //  bias-pull-down;
    // };
};
spi2_sleep_alt: spi2_sleep_alt {
    group1 {
       psels = <NRF_PSEL(SPIM_MOSI, 0, 9)>,
               <NRF_PSEL(SPIM_SCK, 0, 8)>,
               <NRF_PSEL(SPIM_MISO, 0, 10)>;
       low-power-enable;
    };
};

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

Menon — Thu, 23 Mar 2023 15:08:46 GMT

Hello,

When it comes to NCS v2.0.0 and higher you need to use the pinctrl for mapping the pin configuration. Please see this page and also go through Devacdemy lesson2 which explains this with an example.

Kind Regards,

Abhijith

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Thu, 23 Mar 2023 14:17:28 GMT

i am getting this error

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Thu, 23 Mar 2023 14:12:57 GMT

nrf52833dk_nrf52833.overlay

spi_flash0:&spi0 {
	compatible = "nordic,nrf-spi";
	status = "okay";
	sck-pin = <11>;
	mosi-pin = <12>;
	miso-pin = <13>;
};

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Thu, 23 Mar 2023 14:11:49 GMT

prj.conf

CONFIG_SPI=y
CONFIG_FLASH=y
CONFIG_SPI_NOR=y

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Thu, 23 Mar 2023 14:11:06 GMT

main.c

/*
 * Copyright (c) 2016 Intel Corporation.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/kernel.h>
#include <zephyr/drivers/flash.h>
#include <zephyr/device.h>
#include <zephyr/devicetree.h>
#include <stdio.h>
#include <string.h>

#if defined(CONFIG_BOARD_ADAFRUIT_FEATHER_STM32F405)
#define SPI_FLASH_TEST_REGION_OFFSET 0xf000
#elif defined(CONFIG_BOARD_ARTY_A7_ARM_DESIGNSTART_M1) || \
	defined(CONFIG_BOARD_ARTY_A7_ARM_DESIGNSTART_M3)
/* The FPGA bitstream is stored in the lower 536 sectors of the flash. */
#define SPI_FLASH_TEST_REGION_OFFSET \
	DT_REG_SIZE(DT_NODE_BY_FIXED_PARTITION_LABEL(fpga_bitstream))
#elif defined(CONFIG_BOARD_NPCX9M6F_EVB) || \
	defined(CONFIG_BOARD_NPCX7M6FB_EVB)
#define SPI_FLASH_TEST_REGION_OFFSET 0x7F000
#else
#define SPI_FLASH_TEST_REGION_OFFSET 0xff000
#endif
#define SPI_FLASH_SECTOR_SIZE        4096

void main(void)
{
	const uint8_t expected[] = { 0x55, 0xaa, 0x66, 0x99 };
	const size_t len = sizeof(expected);
	uint8_t buf[sizeof(expected)];
	const struct device *flash_dev;
	int rc;

	flash_dev = DEVICE_DT_GET(DT_ALIAS(spi_flash0));

	if (!device_is_ready(flash_dev)) {
		printk("%s: device not ready.\n", flash_dev->name);
		return;
	}

	printf("\n%s SPI flash testing\n", flash_dev->name);
	printf("==========================\n");


	/* Write protection needs to be disabled before each write or
	 * erase, since the flash component turns on write protection
	 * automatically after completion of write and erase
	 * operations.
	 */
	printf("\nTest 1: Flash erase\n");

	/* Full flash erase if SPI_FLASH_TEST_REGION_OFFSET = 0 and
	 * SPI_FLASH_SECTOR_SIZE = flash size
	 */
	rc = flash_erase(flash_dev, SPI_FLASH_TEST_REGION_OFFSET,
			 SPI_FLASH_SECTOR_SIZE);
	if (rc != 0) {
		printf("Flash erase failed! %d\n", rc);
	} else {
		printf("Flash erase succeeded!\n");
	}

	printf("\nTest 2: Flash write\n");

	printf("Attempting to write %zu bytes\n", len);
	rc = flash_write(flash_dev, SPI_FLASH_TEST_REGION_OFFSET, expected, len);
	if (rc != 0) {
		printf("Flash write failed! %d\n", rc);
		return;
	}

	memset(buf, 0, len);
	rc = flash_read(flash_dev, SPI_FLASH_TEST_REGION_OFFSET, buf, len);
	if (rc != 0) {
		printf("Flash read failed! %d\n", rc);
		return;
	}

	if (memcmp(expected, buf, len) == 0) {
		printf("Data read matches data written. Good!!\n");
	} else {
		const uint8_t *wp = expected;
		const uint8_t *rp = buf;
		const uint8_t *rpe = rp + len;

		printf("Data read does not match data written!!\n");
		while (rp < rpe) {
			printf("%08x wrote %02x read %02x %s\n",
			       (uint32_t)(SPI_FLASH_TEST_REGION_OFFSET + (rp - buf)),
			       *wp, *rp, (*rp == *wp) ? "match" : "MISMATCH");
			++rp;
			++wp;
		}
	}
}

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Thu, 23 Mar 2023 14:10:25 GMT

i've looked at this thread it's building for nrf52822 but not for nrf52833. As mentioned in the thread i have enabled CONFIG_SPI_NOR=y. I'll attach the files and can you please help me out with this.

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

Menon — Thu, 23 Mar 2023 11:21:55 GMT

Hello,

Take a look at this old thread from my colleague which explains more on creating the overlay file and configuration you need to include.

Kind Regards,

Abhijith

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

ALIKHAN — Tue, 21 Mar 2023 17:51:24 GMT

tysm that would be really helpfull to understand. Can you also guide me as to what would be the pin out configuration to connect w25qxx to nrf52833dk or if not what to refer for pin out configuration. i am attaching a photo of my flash memory pin out. Also can you guide me as to what changes has to be made or not.

RE: how to connnect external flash(w25qxx) to nrf52833dk board and validate that it the spi communication has been enabled

Shahin97 — Tue, 21 Mar 2023 16:35:50 GMT

A good place to start is the zephyr\samples\drivers\spi_flash example. It's designed for a different board but the application looks in your device tree for spi_flash0. I'd create an overlay for spi_flash0 for your flash with your SPI configurations and go from there.