====== Flashing NRF52 with slstk2010a ======

===== - Requirements =====

==== - Hardware ====
  * slstk2010a : EFM8 Sleepy Bee (STK)
  * STK/WSTK Debug Adapter
  * 10-pin JTag Wires
{{:doc:software:nordic:nrf52:img_20210511_175241.jpg?400|}}

==== - Software ====
  * [[https://www.silabs.com/developers/simplicity-studio | Simplicity Studio 5 ]]
  * [[https://www.segger.com/downloads/jlink/ | J-link Softare ]]


===== - Putting the STK in Debug Out Mode =====
In Simplicity Studio 5 go to : Debug Adapters and select your STK (J-Link Silicon Labs (44....)). In Adapter Configuration, select Debug Mode : OUT.

{{:doc:software:nordic:nrf52:efm8_adaptater.png?400|}}

===== - Flashing the NRF52 =====

Plug The Debug Adapter on the STK and plug the 10-pin JTAG Cable on the Cortex Connector of the Debug Adapter :

{{:doc:software:nordic:nrf52:img_20210511_171138.jpg?400|}}

The other end of the 10-pin JTAG Cable goes to the Flipper JTAG Connector (Rose Wire is in on the Side of the white dote)

{{:doc:software:nordic:nrf52:img_20210511_183431.jpg?400|}}


Then : Open J-Link Commander V..

Type following commands in that order :
  - connect
  - NRF52840_XXAA
  - s
  - loadfile app_location/app.hex

ex with arduino bootloader :
<code>
J-Link>connect
Please specify device / core. <Default>: NRF52
Type '?' for selection dialog
Device>?
Please specify target interface:
  J) JTAG (Default)
  S) SWD
  T) cJTAG
TIF>s
Specify target interface speed [kHz]. <Default>: 4000 kHz
Speed>
Device "NRF52840_XXAA" selected.
Connecting to target via SWD
InitTarget() start
InitTarget() end
Found SW-DP with ID 0x2BA01477
Unknown DP version. Assuming DPv0
Scanning AP map to find all available APs
AP[2]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x24770011)
AP[1]: JTAG-AP (IDR: 0x02880000)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)
Found Cortex-M4 r0p1, Little endian.
FPUnit: 6 code (BP) slots and 2 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB00C SCS-M7
ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 003BB002 DWT
ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 002BB003 FPB
ROMTbl[0][3]: E0000000, CID: B105E00D, PID: 003BB001 ITM
ROMTbl[0][4]: E0040000, CID: B105900D, PID: 000BB9A1 TPIU
ROMTbl[0][5]: E0041000, CID: B105900D, PID: 000BB925 ETM
Cortex-M4 identified.
J-Link>loadfile C:\Users\Romain\AppData\Local\Arduino15\packages\strataggem\hardware\nrf52\0.3.1\bootloader\flipper_nrf52840\flipper_nrf52840_bootloader-0.3.2_s140_6.1.1.hex
Downloading file [C:\Users\Romain\AppData\Local\Arduino15\packages\strataggem\hardware\nrf52\0.3.1\bootloader\flipper_nrf52840\flipper_nrf52840_bootloader-0.3.2_s140_6.1.1.hex]...
J-Link: Flash download: Bank 0 @ 0x00000000: 1 range affected (4096 bytes)
J-Link: Flash download: Total: 0.472s (Prepare: 0.064s, Compare: 0.203s, Erase: 0.087s, Program & Verify: 0.104s, Restore: 0.012s)
J-Link: Flash download: Program & Verify speed: 38 KB/s
O.K.
</code>