nRF5340 and W25Q512NW Nor Flash R/W problem?

[G gautam]

Hello,

I am using W25Q512NW (https://www.winbond.com/resource-files/W25Q512NW%20RevB%2007192021.pdf) in my custom board. I want to store the sensor data in this flash.

My custom board use the nRF5340 MCU and the version of the nrf connect sdk is V2.5.2.

the problem i am facing that i am not able to read the data from the flash.

 

*** Booting nRF Connect SDK v2.5.2 ***
[00:00:00.252,868] <inf> main: iMedrix External flash Application Started.

Device name: w25q512nw@0
Data written. Good!!
23 22 33 44 55 66 77 88 
Data read. Good!!
FF FF FF FF FF FF FF FF 
Data not matched..!!
JEDEC ID : EF  60  20 

In above log, i am writing 8 bytes and also read those 8 bytes. but when i read data from the flash i am getting only FF. 
And when i read the JEDEC id of the flash, i am getting right JEDEC id.

Here is the prj.conf file.

# Logger module
CONFIG_USE_SEGGER_RTT=y
CONFIG_RTT_CONSOLE=y
CONFIG_LOG_BACKEND_RTT=y
CONFIG_LOG=y
CONFIG_LOG_MODE_DEFERRED=y
CONFIG_LOG_SPEED=y
CONFIG_UART_CONSOLE=n

CONFIG_DEBUG=y


# spi Configuration
CONFIG_SPI=y

#External flash configuration
CONFIG_FLASH=y
CONFIG_FLASH_JESD216_API=y
CONFIG_FLASH_PAGE_LAYOUT=y


CONFIG_NEWLIB_LIBC=y

Here is the .overlay file below.

 

&qspi {
	status = "okay";
	pinctrl-0 = <&qspi_default>;
	pinctrl-1 = <&qspi_sleep>;
	pinctrl-names = "default", "sleep";
	w25q512: w25q512nw@0 {
		compatible = "nordic,qspi-nor";
		reg = <0>;
		/* MX25R64 supports only pp and pp4io */
		writeoc = "pp4io";
		// writeoc = "pp4o";
		/* MX25R64 supports all readoc options */
		readoc = "read4io";
		sck-frequency = <8000000>;
		// jedec-id = [c2 28 17];
		jedec-id = [EF 60 20];
		sfdp-bfp = [
  			e5 20 fb ff  ff ff ff 1f  44 eb 08 6b  08 3b 42 bb
  			fe ff ff ff  ff ff 00 00  ff ff 40 eb  0c 20 0f 52
  			10 d8 00 00  33 02 a6 00  81 e7 14 d9  e9 63 76 33
  			7a 75 7a 75  f7 bd d5 5c  19 f7 5d ff  e9 70 f9 a5
  		];
		size = <536870912>;
		// address-size-32;
		has-dpd;
		// t-enter-dpd = <10000>;
		// t-exit-dpd = <35000>;
		t-enter-dpd = <3000>;
		t-exit-dpd = <30000>;
	};
};

Please give me your suggestion in this.  

Let me know if any modification is required.

Thank you in advance.

Gautam.

[Simonr]

Hi

1. Not that I'm aware. Why would you need to pull the wp pin high here?

2.The device tree uses the bias-pull-up; to create a pull-up in SW, and you can look at the nRF5340 .dtsi board files for reference here.

3. What do you mean by "ideal state" here exactly. This depends on if the QSPI is currently in use or not, as it would either be running or in sleep mode.

4. The short answer here is that it is not supported and have not been tested, but it might work for all we know. There are no drivers in Zephyr supporting this though, so you would have to stand for the implementation yourself, as this is not something we can provide help with.

5. Please check out the DevAcademy nRF Connect Fundamentals course here. Lesson 2 there takes you through and explains the devicetree better than I can do and sheds light on how an application uses pins and instances set in the devicetree.

Best regards,

Simon