nRF52833 Secure DFU Bootloader Issue with Keil uVision 5 and ARM Compiler 6

RE: nRF52833 Secure DFU Bootloader Issue with Keil uVision 5 and ARM Compiler 6

Rohit15 — Fri, 29 May 2026 13:57:55 GMT

Thank You Vidar

RE: nRF52833 Secure DFU Bootloader Issue with Keil uVision 5 and ARM Compiler 6

Vidar Berg — Thu, 21 May 2026 11:18:28 GMT

To use ARM clang you would need to add support for it first in the SDK code. This posts gives some details about what is currently missing for it to work: https://devzone.nordicsemi.com/f/nordic-q-a/50605/nrf52-development-using-clang/203490

RE: nRF52833 Secure DFU Bootloader Issue with Keil uVision 5 and ARM Compiler 6

Rohit15 — Thu, 21 May 2026 10:23:28 GMT

Hello Vidar, actually I want to use ARM Compiler 6, but I am facing an issue.
When I manually write the UICR and then read the register, the value is read correctly, but I still get an error and BLE advertising does not start.

C:\Users\admin>nrfjprog --memwr 0x10001014 --val 0x73000
Parsing parameters.
Writing.

C:\Users\admin>nrfjprog --reset
Applying system reset.
Run.

C:\Users\admin>nrfjprog --readregs
R0: 0x0007321D
R1: 0x00073215
R2: 0x20000000
R3: 0x00000417
R4: 0x00000FFC
R5: 0x0007E080
R6: 0x10001000
R7: 0x0007E000
R8: 0x00000000
R9: 0x00000000
R10: 0x00000000
R11: 0x00000000
R12: 0x00000000
SP: 0x00073214
LR: 0x000004EF
PC: 0x0007321C
xPSR: 0x01000000
MSP: 0x00073214
PSP: 0x00000000
RAZ: 0x00000000
CFBP: 0x00000000
APSR: 0x00000000
EPSR: 0x01000000
IPSR: 0x00000000

RE: nRF52833 Secure DFU Bootloader Issue with Keil uVision 5 and ARM Compiler 6

Vidar Berg — Mon, 18 May 2026 12:20:45 GMT

Hello,

The register readout show that a fault exception was raised. The likely reason for this is that you are using the ARM Clang compiler which is not compatible with this SDK. Please use ARM Compiler 5 and try again. This compiler is available in MDK-ARM version 5.25

(https://docs.nordicsemi.com/bundle/sdk_nrf5_v17.1.0/page/index.html)

Best regards,

Vidar