no init in RAM area question

RE: no init in RAM area question

Vidar Berg — Tue, 25 May 2021 09:51:23 GMT

It looks like you have done it correctly. I suggest that you review the *.map file for the bootloader and application to check if there is anything overlapping with your "no init" section.

RE: no init in RAM area question

air — Mon, 24 May 2021 08:50:36 GMT

I attach my ld file.

devzone.nordicsemi.com/.../secure_5F00_dfu_5F00_gcc_5F00_nrf51.ld

RE: no init in RAM area question

air — Mon, 24 May 2021 06:22:02 GMT

Hello,

I want to ask more.

I made 2 FW ver using 2 RAM address map and tested Case 1 / 2.

I don’t know why the new bootloader configuration is not reflected in Case 2.

I’m reviewing and hope your help.

Thanks.

********************************************************************

* FW ver 1 configuration

- application

- bootloader

  /** RAM Region for bootloader. This setting is suitable when used with s110, s120, s130, s310. */
  /* RAM (rwx) :  ORIGIN = 0x20002C00, LENGTH = 0x5380 */
  RAM (rwx) :  ORIGIN = 0x200025e0, LENGTH = 0x59A0

  /** Location of non initialized RAM. Non initialized RAM is used for exchanging bond information
   *  from application to bootloader when using buttonluss DFU OTA.
   */
  NOINIT (rwx) :  ORIGIN = 0x20007F80, LENGTH = 0x80

* FW ver 2 configuration

- application

- bootloader

  /** RAM Region for bootloader. This setting is suitable when used with s110, s120, s130, s310. */
  /* RAM (rwx) :  ORIGIN = 0x20002C00, LENGTH = 0x5380 */
  RAM (rwx) :  ORIGIN = 0x200025e0, LENGTH = 0x55A0

  /** Location of non initialized RAM. Non initialized RAM is used for exchanging bond information
   *  from application to bootloader when using buttonluss DFU OTA.
   */
  NOINIT (rwx) :  ORIGIN = 0x20007B80, LENGTH = 0x480

********************************************************************

* test *

* Case 1 : FW ver 2

Ver 2 writing using nrfutil.
Writing some data to no init RAM area
Ver 2 DFU
No init RAM area has data I wrote before DFU
Writing some data to no init RAM area
Soft reset using debugger and nrfutil with power maintained
No init RAM area has data I wrote before soft reset

* Case 2 : FW Ver 1 -> ver 2

Ver 1 writing using nrfutil.
Ver 2 DFU
Writing some data to no init RAM area
Soft reset using debugger and nrfutil with power maintained
No init RAM area has erased

RE: no init in RAM area question

air — Wed, 12 May 2021 00:53:30 GMT

Hello,

I modified the area in the *.ld file as below.

I solved it quickly thanks to your advice.

Thank you.

  /** RAM Region for bootloader. This setting is suitable when used with s110, s120, s130, s310. */
  /* RAM (rwx) :  ORIGIN = 0x20002C00, LENGTH = 0x5380 */
  /* RAM (rwx) :  ORIGIN = 0x200025e0, LENGTH = 0x59A0 ---> old area */
  RAM (rwx) :  ORIGIN = 0x200025e0, LENGTH = 0x55A0

  /** Location of non initialized RAM. Non initialized RAM is used for exchanging bond information
   *  from application to bootloader when using buttonluss DFU OTA.
   */
  /* NOINIT (rwx) :  ORIGIN = 0x20007F80, LENGTH = 0x80 --> old area */
  NOINIT (rwx) :  ORIGIN = 0x20007B80, LENGTH = 0x480

RE: no init in RAM area question

Vidar Berg — Tue, 11 May 2021 15:42:08 GMT

Hello,

Have you allocated the same ".no_init" region in both the bootloader and the application, and do you see the same if you only program the Softdevice+application without the bootloader?

Thanks,

Vidar