Error: Flash Download failed - "Cortex-M4" while programming the UICR

[RussM]

When I try to write a UUID into the UICR registers using the method described at - Software Development Kit > nRF5 SDK > nRF5 SDK v12.2.0 > Examples > Hardware peripheral examples My setup is:

Without changing anything in the code – and I compile the project, my resultant hex file does have the requisite: :020000041000EA :041080007856341258 :0400000500000401F2 :00000001FF

The compiler output is: *** Using Compiler 'V5.06 update 4 (build 422)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin' Build target 'nrf52832_xxaa' assembling arm_startup_nrf52.s... compiling app_error.c... compiling system_nrf52.c... compiling main.c... linking... Program Size: Code=728 RO-data=1060 RW-data=4 ZI-data=8196
FromELF: creating hex file... "._build\nrf52832_xxaa.axf" - 0 Error(s), 0 Warning(s). Build Time Elapsed: 00:00:03 Load "C:\nRF52 DK Test Apps\examples\peripheral\uicr_config\pca10040\arm5\_build\nrf52832_xxaa.axf" Set JLink Project File to "C:\nRF52 DK Test Apps\examples\peripheral\uicr_config\pca10040\arm5\JLinkSettings.ini"

• JLink Info: Device "NRF52832_XXAA" selected.

JLink info:

DLL: V6.12a, compiled Dec 2 2016 16:44:26 Firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Nov 14 2016 16:58:29 Hardware: V1.00 S/N : 682611635

• JLink Info: Found SWD-DP with ID 0x2BA01477
• JLink Info: Found SWD-DP with ID 0x2BA01477
• JLink Info: AP-IDR: 0x24770011, Type: AHB-AP
• JLink Info: Found Cortex-M4 r0p1, Little endian.
• JLink Info: FPUnit: 6 code (BP) slots and 2 literal slots
• JLink Info: CoreSight components:
• JLink Info: ROMTbl 0 @ E00FF000
• JLink Info: ROMTbl 0 [0]: FFF0F000, CID: B105E00D, PID: 000BB00C SCS
• JLink Info: ROMTbl 0 [1]: FFF02000, CID: B105E00D, PID: 003BB002 DWT
• JLink Info: ROMTbl 0 [2]: FFF03000, CID: B105E00D, PID: 002BB003 FPB
• JLink Info: ROMTbl 0 [3]: FFF01000, CID: B105E00D, PID: 003BB001 ITM
• JLink Info: ROMTbl 0 [4]: FFF41000, CID: B105900D, PID: 000BB9A1 TPIU
• JLink Info: ROMTbl 0 [5]: FFF42000, CID: B105900D, PID: 000BB925 ETM ROMTableAddr = 0xE00FF000

Target info:

Device: nRF52832_xxAA VTarget = 3.300V State of Pins: TCK: 0, TDI: 1, TDO: 1, TMS: 1, TRES: 1, TRST: 1 Hardware-Breakpoints: 6 Software-Breakpoints: 8192 Watchpoints: 4 JTAG speed: 1000 kHz

Erase Failed! Error: Flash Download failed - "Cortex-M4" Flash Load finished at 18:58:29

The only issue is that the nrf52832 is an M4 core machine, but the only option available in the PACKs for this are arm5 based.

What can I do to get it to program correctly? Any other item I have played with to get the feel of this device, have all worked well when programmed into the processor.

[Jørgen Holmefjord]

Can you try erasing the UICR using nrfjprog with the command nrfjprog --family nrf52 --eraseuicr before programming the example?

[RussM]

Tried that - same problem Tried it the old fashioned way with nrfjprog

nrfjprog --snr 682611635 --family nrf52 --memwr 0x10001080 --val 0x03DAA0D2
nrfjprog --snr 682611635 --family nrf52 --memwr 0x10001084 --val 0xF21DB07B
nrfjprog --snr 682611635 --family nrf52 --memwr 0x10001088 --val 0xB9A3000F
nrfjprog --snr 682611635 --family nrf52 --memwr 0x1000108A --val 0x030100E7
And it errored on the fourth memwr
C:\Users\RussM>nrfjprog --snr 682611635 --family nrf52 --memwr 0x1000108A --val 0x030100E7
Parsing parameters.
ERROR: Argument provided has a wrong value. Memory access not aligned, value
ERROR: outside of range or similar.
C:\Users\RussM>nrfjprog --snr 682611635 --family nRF52 --memrd 0x10001080 --w 32 --n 128
0x10001080: 03DAA0D2 F21DB07B B9A3000F FFFFFFFF   |....{...........|

This be frustrating - any suggestions

[Jørgen Holmefjord]

You are trying to write a register that is not word alligned. Try changing your last memwr to 0x1000108C.

[RussM]

Thank you Jørgen - how stupid of me - it's usually the simplest thing that brings us down.

[Jørgen Holmefjord]

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