Writing and reading data from NRF52 serial flash memory in Zephyr

[Basri Kilic]

Hello everyone. I have an nRF52832 processor and a W25Q128JVPIQ serial flash memory. I want to save data to this flash memory and read from it. I haven't done such an application before. Can you give me some tips for this application? I'm using Zephyr.

[Priyanka]

Hi,

Please take a look at the NVS sample.

Best Regards,

Priyanka

[Basri Kilic]

I used the spi_flash sample code. Below is the overlay file I created. There are no errors during the compilation of the code. However, in the terminal, I see the message 'Flash memory device not ready.

/ {
    aliases {
        spi-flash0 = &w25q128jv;
    };
};


&spi0 {
	compatible = "nordic,nrf-spi";
	status = "okay";
	cs-gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;

	pinctrl-0 = <&spi0_default_alt>;
	pinctrl-1 = <&spi0_sleep_alt>;
	pinctrl-names = "default", "sleep";
	w25q128jv:w25q128jv@0 {
		compatible = "jedec,spi-nor";
        status = "okay";
		reg = <0>;
		spi-max-frequency = <8000000>;
	jedec-id = [EF 40 16];	
		size = <4194304>;};
};

&spi1 {
	status = "disabled";
};

&spi2 {
	status = "disabled";
};


&pinctrl {
	spi0_default_alt: spi0_default_alt {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 11)>,
				<NRF_PSEL(SPIM_MOSI, 0, 12)>,
				<NRF_PSEL(SPIM_MISO, 0, 13)>;
		};

		
	};

	spi0_sleep_alt: spi0_sleep_alt {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 0, 11)>,
				<NRF_PSEL(SPIM_MOSI, 0, 12)>,
				<NRF_PSEL(SPIM_MISO, 0, 13)>;
			low-power-enable;
		};
	};

};

I have no information about the JEDEC-ID values in the overlay file. I just took them from a sample code.


The error function I see in the RTT terminal is as follows

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

[Priyanka]

Hi,

I will take a look at this. In the meantime, could you refer to this ticket and see how it goes?

-Priyanka