Using openbootloader & softdevice to switch two app

RE: Using openbootloader & softdevice to switch two app

Simonr — Mon, 16 Nov 2020 13:55:16 GMT

Please make sure that you don't forward interrupts to the start address of your application using the SD_MBR_COMMAND_IRQ_FORWARD_ADDRESS_SET command. This will cause the jump to the application to be executed successfully, but crash as the nrf_sdh_enable_request() is called. Try removing this forwarding command if you're using it.

Best regards,

Simon

RE: Using openbootloader & softdevice to switch two app

IanChen — Mon, 16 Nov 2020 07:24:22 GMT

Hi,

I have try this command, but I still can't jump the address except 0x27000.

Is there any loss in the app FW?

I only modify the *.icf file, __ICFEDIT_intvec_start__ and __ICFEDIT_region_ROM_start__.

RE: Using openbootloader & softdevice to switch two app

Simonr — Fri, 13 Nov 2020 11:36:10 GMT

As explained in this case, which seems to be very similar to yours, you can jump from the bootloader to your firmware with the following function:

static sd_mbr_command_t init_sd_command = {SD_MBR_COMMAND_INIT_SD, };

void jump_to_fw(uint32_t fwaddr)
{
	sd_mbr_command(&init_sd_command);
	sd_softdevice_vector_table_base_set(fwaddr);
	uint32_t app_start_ptr = ((uint32_t *)fwaddr)[1];  // get start address from vector table
	((void (*)()) app_start_ptr) ();
}

Best regards,

Simon