Hello,
I'm trying to implement DFU support to our application on nRF52832. I got it working fine with SDK11 SD2.0, but now SDK12.2 SD3.0 is causing "gray hairs". I used the file "nrf_dfu_flash_buttonless.c" from examples to avoid peer_manager (which used huge amount or ram), but I can't get it to work.
If I understand correctly the m_dfu_settings_buffer should point to the FLASH page with DFU settings. However the target.map generated by the linker shows:
.bootloaderSettings
0x200024c0 0x1000 load address 0x00059890
.bootloaderSettings
0x200024c0 0x1000 C:/Projects/nextgen/movesense-gcc/package/lib/GCCARM/libmovesense-coreD.a(nrf_dfu_settings.c.obj)
0x200024c0 m_dfu_settings_buffer
.fs_data 0x200034c0 0x10 load address 0x0005a890
and the JLink debug output shows:
0> :INFO:running nrf_dfu_settings_init
0> :INFO:!!!!!!!!!!!!!!! Resetting bootloader settings !!!!!!!!!!!
0> :INFO:Erasing old settings at: 0x200024c0
0> :INFO:Erasing: 0x200024c0, num: 1
0> :INFO:Erase failed: 1
0> :ERROR:Erasing from flash memory failed.
The obvious problem is that the bootloaderSettings / m_dfu_settings_buffer is mapped to RAM instead of FLASH where it should be, even if it is set there in .ld -file:
/* 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 = 0x75000, LENGTH = 0x9000
/** RAM Region for bootloader. This setting is suitable when used with s132. */
RAM (rwx) : ORIGIN = 0x20002C00, LENGTH = 0x5380
/** 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
/** Location of bootloader setting in flash. */
BOOTLOADER_SETTINGS (rw) : ORIGIN = 0x0007F000, LENGTH = 0x1000
/** Location in UICR where bootloader start address is stored. */
UICR_BOOTLOADER (r) : ORIGIN = 0x10001014, LENGTH = 0x04
/** Location of mbr params page in flash. */
MBR_PARAMS_PAGE (rw) : ORIGIN = 0x0007E000, LENGTH = 0x1000
/** Location in UICR where mbr params page address is stored. */
UICR_MBR_PARAM_PAGE(r) : ORIGIN = 0x10001018, LENGTH = 0x04
}
SECTIONS
{
/* Place the bootloader settings page in flash. */
.bootloaderSettings(NOLOAD) :
{
} > BOOTLOADER_SETTINGS
/* Write the bootloader address in UICR. */
.uicrBootStartAddress :
{
KEEP(*(.uicrBootStartAddress))
} > UICR_BOOTLOADER
/* Place the mbr params page in flash. */
.mbrParamsPage(NOLOAD) :
{
} > MBR_PARAMS_PAGE
/* Write the bootloader address in UICR. */
.uicrMbrParamsPageAddress :
{
KEEP(*(.uicrMbrParamsPageAddress))
} > UICR_MBR_PARAM_PAGE
/* 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 "nrf52_common.ld"
Any ideas?