How to use JFlash to flash an nRF52840

RE: How to use JFlash to flash an nRF52840

Priyanka — Fri, 25 Oct 2024 10:14:59 GMT

Glad to help 🙂

RE: How to use JFlash to flash an nRF52840

mike1369 — Thu, 24 Oct 2024 13:59:04 GMT

That's really helpful !
This is what I get:

nrfjprog --deviceversion
682851091 - NRF52832_xxAA_REV3

so, definitely an nRF52832

I really appreciate your help.
You can consider my demand as completed and close it
Many thanks Priyanka !

RE: How to use JFlash to flash an nRF52840

Priyanka — Thu, 24 Oct 2024 13:49:23 GMT

Hi,

You can try the "nrfjprog --deviceversion". This should print out the details.

-Priyanka

RE: How to use JFlash to flash an nRF52840

mike1369 — Thu, 24 Oct 2024 13:27:27 GMT

OK, finally got it.
If I change nRF52840_xxAA to nRF52832_xxAA the flashing works

I was told that the board contained a nRF52840
Do you know an easy way to confirm (ideally by a command in a terminal) the device embedded on the board ?

RE: How to use JFlash to flash an nRF52840

mike1369 — Thu, 24 Oct 2024 12:54:15 GMT

could you provide me a nrf52840.jflash that allows to flash a nRF52840 ?

I made one with JFlash / New project, and selecting type nRF52840_xxAA

Here is the file I got :
-----------------------------------------------------------------
  AppVersion = 81001
  FileVersion = 2
[GENERAL]
  aATEModuleSel[24] = 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
  ConnectMode = 0
  CurrentFile = ""
  DataFileSAddr = 0x00000000
  GUIMode = 0
  HostName = ""
  TargetIF = 1
  USBPort = 0
  USBSerialNo = 0x00000000
  UseATEModuleSelection = 0
[JTAG]
  IRLen = 0
  MultipleTargets = 0
  NumDevices = 0
  Speed0 = 1000
  Speed1 = 1000
  TAP_Number = 0
  UseAdaptive0 = 0
  UseAdaptive1 = 0
  UseMaxSpeed0 = 0
  UseMaxSpeed1 = 0
[CPU]
  NumInitSteps = 1
  InitStep0_Action = "Reset"
  InitStep0_Value0 = 0x00000000
  InitStep0_Value1 = 0x00000000
  InitStep0_Comment = "Reset and halt target"
  NumExitSteps = 0
  UseScriptFile = 0
  ScriptFile = ""
  RAMAddr = 0x20000000
  RAMSize = 0x00040000
  CheckCoreID = 1
  CoreID = 0x4BA00477
  CoreIDMask = 0x0F000FFF
  UseAutoSpeed = 0x00000001
  ClockSpeed = 0x00000000
  EndianMode = 0
  ChipName = "Nordic Semi nRF52840_xxAA"
[FLASH]
  aRangeSel[1] = 0-256
  BankName = "Internal flash"
  BankSelMode = 1
  BaseAddr = 0x00000000
  NumBanks = 1
[PRODUCTION]
  AutoPerformsDisconnect = 0
  AutoPerformsErase = 1
  AutoPerformsProgram = 1
  AutoPerformsSecure = 0
  AutoPerformsStartApp = 0
  AutoPerformsVerify = 1
  EnableFixedVTref = 0
  EnableTargetPower = 0
  EraseType = 1
  FixedVTref = 0x00000CE4
  MonitorVTref = 0
  MonitorVTrefMax = 0x0000157C
  MonitorVTrefMin = 0x000003E8
  OverrideTimeouts = 0
  ProgramSN = 0
  SerialFile = ""
  SNAddr = 0x00000000
  SNInc = 0x00000001
  SNLen = 0x00000004
  SNListFile = ""
  SNValue = 0x00000001
  StartAppType = 0
  TargetPowerDelay = 0x00000014
  TimeoutErase = 0x00003A98
  TimeoutProgram = 0x00002710
  TimeoutVerify = 0x00002710
  VerifyType = 1
[PERFORMANCE]
  DisableSkipBlankDataOnProgram = 0x00000000
  PerfromBlankCheckPriorEraseChip = 0x00000001
  PerfromBlankCheckPriorEraseSelectedSectors = 0x00000001
-----------------------------------------------------------------

RE: How to use JFlash to flash an nRF52840

Priyanka — Thu, 24 Oct 2024 12:17:42 GMT

Hi,

Could you verify in J-Flash that you "Program the entire chip" ?

Also, please try lowering the SWD speed. I see that you are using around 4000 for J-link, but maybe try using around 1000-2000 and check.

You can also first try flashing a smaller hex file and verify if it works.

Regards,

Priyanka