Bootloader setup

RE: Bootloader setup

bjorn-spockeli — Tue, 06 Sep 2016 11:05:29 GMT

@yon : Could you mark the answer as correct? (click the check mark in the circle to the left of the answer).

RE: Bootloader setup

yon — Tue, 06 Sep 2016 10:31:55 GMT

noted, thanks

RE: Bootloader setup

bjorn-spockeli — Tue, 06 Sep 2016 08:34:29 GMT

If there is a bootloader present,i.e. the bootloader start address is written to UICR, then the MBR will pass execution to it, Thus, you only need to reset the device in order to jump to the bootloader, i.e. call NVIC_SystemReset();

RE: Bootloader setup

yon — Tue, 06 Sep 2016 08:24:35 GMT

so if in my app i didn't call ble_stack_init(), i can put the same snippet to jump back from app to bootloader?

RE: Bootloader setup

yon — Tue, 06 Sep 2016 08:12:22 GMT

Excellent! It work perfectly now. Thank you very much.

RE: Bootloader setup

bjorn-spockeli — Tue, 06 Sep 2016 07:53:36 GMT

You need to call the following snippet before calling bootloader_app_start()

sd_mbr_command_t com = {SD_MBR_COMMAND_INIT_SD, };

err_code = sd_mbr_command(&com);
APP_ERROR_CHECK(err_code);

This will configure the MBR to forward interrupts to the SoftDevice, which in turn will forward them to the application.

Note: The SD_MBR_COMMAND_INIT_SD can only be issued once to the MBR, so if the application ran ble_stack_init() before jumping to the bootloader, then this snippet should not be run in the bootloader.

RE: Bootloader setup

yon — Tue, 06 Sep 2016 02:23:05 GMT

Thank for your reply.

We make use of example from nRF5_SDK_11.0.0_89a8197\examples\dfu\bootloader; and we are using Eclipse with arm gcc complier.

What we have done: (using softdevice s132)

Modified the main.c to print DFU_BANK_0_REGION_START to uart console(putty); get 0x0001C000.
Build blinky example with:

FLASH (rx) : ORIGIN = 0x1C000, LENGTH = 0x9000 RAM (rwx) : ORIGIN = 0x20002080, LENGTH = 0x6000
Add bootloader_app_start(DFU_BANK_0_REGION_START); after "print DFU_BANK_0_REGION_START" code.
Flash and run, uart console get 0x0001C000 but not jumping to blinky example.

RE: Bootloader setup

bjorn-spockeli — Mon, 29 Aug 2016 07:43:44 GMT

Hi Yon, if you are using SDK v11.0.0 and S132 v2.0.0 then you should use the following linkerscript settings for the application

MEMORY
{
  FLASH (rx) : ORIGIN = 0x1c000, LENGTH = 0x5E000
  RAM (rwx) :  ORIGIN = 0x20002080, LENGTH = 0xdf80
}