Jlink 6.12 back to 5.12G

After uninstall 6.12 by tool, open win10 regedit(start+r).

HKEY_USERS find SEGGER->J-Link
Change CurrentVersion and InstallPath to V512f's value.

HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\SEGGER\J-Link
Also change CurrentVersion and Install path to V512f.

Fix PCA10028

I don't know why but PCA10028 suddenly can't work anymore. My PC is MacBook pro-2016, and I use Parallels 12 running Win10. Win10 recognize PCA10028 to Atmel modem BOSSA port. PCA10028 even can't enter bootloader mode, so I can't recover the firmware.

After two days trying, finally I successful get it back.  I didn't have Atmel programming tools, only need usb and a line to short VDD and erace pin.

https://wiki.newae.com/Manual_SAM3U_Firmware_Update
This is a useful website, teach me how to erace.


Here are my steps.

1. I tried to erase ATSAM3U2CA by short R18 to VDD over 10s. I'm not sure need this step or not, but I did it. (Be careful, the other side of R18 is GND)

2. I use my MacBook pro download BOSSA tool from http://www.shumatech.com/web/products/bossa The BOSSA tool can't install in win10 64bit, so I change to use Mac os.

3. Use BOSSA tool Auto-Scan, and get the device name = ATSAM3U2. You can see the picture I attached.

4. Choose firmware: https://goo.gl/F71GM8  File name: firmware.bin. I put it on google drive.

5. Power cycle PCA10028(at this moment, the LED still off), and turn it off again. Then hold down the Reset button and turn on the power.

6. Now I can see it enter bootloader in windows10(LED also alive~), and I put new firmware in it. After reboot it, use nRFgo to update it, and it works as usual!  Firmware: https://goo.gl/V3UE4G  Filename: J-Link OB-SAM3U128-V2-NordicSemi 160212.bin