Hello,
I am using a custom board and my setup looks like this:
- nrf51 chip
- 16KB RAM
- 256KB of Flash
- external crystal of 32MHz
- SDK12.1
- Compiling on Linux using GCC
I am trying to port the bootloader_secure example to the custom board. I have been able to run this example to the pca10028 board. Same code, some build system. Only with a few needed adjustments for the pca10028 of course. No issues currently.
Now, with the same build system I just compile this for the custom board. To make things more interesting, I am using the same linker script for both the pca10028 and the custom one - that is the adjusted one for the 16KB of RAM (remember the example runs OK on pca10028). This looks like this:
/* Linker script to configure memory regions. */
SEARCH_DIR(.)
GROUP(-lgcc -lc -lnosys)
MEMORY
{
/** Flash start address for the bootloader. This setting will also be stored in UICR to allow the
* MBR to init the bootloader when starting the system. This value must correspond to
* BOOTLOADER_REGION_START found in dfu_types.h. The system is prevented from starting up if
* those values do not match. The check is performed in main.c, see
* APP_ERROR_CHECK_BOOL(*((uint32_t *)NRF_UICR_BOOT_START_ADDRESS) == BOOTLOADER_REGION_START);
*/
/*FLASH (rx) : ORIGIN = 0x35C00, LENGTH = 0xA000*/
FLASH (rx) : ORIGIN = 0x35C00, LENGTH = 0xA000
/** RAM Region for bootloader. This setting is suitable when used with s110, s120, s130, s310. */
/* RAM (rwx) : ORIGIN = 0x20002560, LENGTH = 0x1A20 */
RAM (rwx) : ORIGIN = 0x20002C00, LENGTH = 0x1380
/** 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 = 0x20003F80, LENGTH = 0x80
/** Location of bootloader setting in at the last flash page. */
BOOTLOADER_SETTINGS (rw) : ORIGIN = 0x0003FC00, LENGTH = 0x0400
/** Location in UICR where bootloader start address is stored. */
UICR_BOOTLOADER (r) : ORIGIN = 0x10001014, LENGTH = 0x04
}
SECTIONS
{
/* Ensures the bootloader settings are placed at the last flash page. */
.bootloaderSettings(NOLOAD) :
{
} > BOOTLOADER_SETTINGS
/* Ensures the Bootloader start address in flash is written to UICR when flashing the image. */
.uicrBootStartAddress :
{
KEEP(*(.uicrBootStartAddress))
} > UICR_BOOTLOADER
/* No init RAM section in bootloader. Used for bond information exchange. */
.noinit(NOLOAD) :
{
} > NOINIT
/* other placements follow here... */
}
SECTIONS
{
. = ALIGN(4);
.fs_data :
{
PROVIDE(__start_fs_data = .);
KEEP(*(.fs_data))
PROVIDE(__stop_fs_data = .);
} > RAM
. = ALIGN(4);
.svc_data :
{
PROVIDE(__start_svc_data = .);
KEEP(*(.svc_data))
PROVIDE(__stop_svc_data = .);
} > RAM
. = ALIGN(4);
.dfu_trans :
{
PROVIDE(__start_dfu_trans = .);
KEEP(*(.dfu_trans))
PROVIDE(__stop_dfu_trans = .);
} > RAM
} INSERT AFTER .data
INCLUDE "nrf51_common.ld"
Stack size for both examples is at 255 bytes. Heap is zero.
This is the debug output of the custom board:
ain) Inside main
(nrf_bootloader_init) In nrf_bootloader_init
(nrf_dfu_init) In real nrf_dfu_init
(nrf_dfu_settings_init) running nrf_dfu_settings_init
(nrf_dfu_continue) Enter nrf_dfu_continue
(nrf_dfu_continue_bank) Single: Invalid bank
(nrf_dfu_app_is_valid) Enter nrf_dfu_app_is_valid
(nrf_dfu_app_is_valid) Return false in valid app check
(nrf_dfu_transports_init) In nrf_dfu_transports_init
(nrf_dfu_transports_init) num transports: 1
(ble_stack_init) vector table: 0x00035C00
(softdevice_enable) sd_ble_enable: RAM START at 0x20001FE8
(softdevice_enable) sd_ble_enable: app_ram_base should be adjusted to 0x200025E0
(softdevice_enable) ram size should be adjusted to 0x5A20
(nrf_dfu_transports_init) After nrf_dfu_transports_init
(nrf_dfu_init) Could not initalize DFU transport: 0x00F42400
ain) Inside main
The program reaches a point where it resets itself. And this happens forever. The softdevice has no chance in getting into advertising mode.
Any clues? Any ideas how to move forward?
Thanks!
