Programming MDBT40 with Jlink: Failed to download RAMCode!

RE: Programming MDBT40 with Jlink: Failed to download RAMCode!

Shay Ohayon — Tue, 17 May 2016 17:44:05 GMT

Follow these instruction:electronut.in/.../

RE: Programming MDBT40 with Jlink: Failed to download RAMCode!

SMAG — Tue, 17 May 2016 07:31:59 GMT

Hi Shay Ohayon,

I am new on working on the MDBT40. So if you kindly guide me to the procedure to connect it with nRF51 DK using JLINK headers and how to flash our own code in it using nRFgo.

Thanks Umair

RE: Programming MDBT40 with Jlink: Failed to download RAMCode!

Shay Ohayon — Tue, 29 Mar 2016 12:39:35 GMT

Solved!. The problem was write-protection on the flash. I used nRFgo to erase the flash, then I was able to flash it with Jlink. And yes, the length should be 0x6000

RE: Programming MDBT40 with Jlink: Failed to download RAMCode!

bjorn-spockeli — Tue, 29 Mar 2016 12:37:46 GMT

The correct linker script values for the 32kB variant should be:

FLASH (rx) : ORIGIN = 0x18000, LENGTH = 0x28000 
RAM (rwx) : ORIGIN = 0x20002000, LENGTH = 0x6000

RE: Programming MDBT40 with Jlink: Failed to download RAMCode!

Shay Ohayon — Sat, 26 Mar 2016 20:08:34 GMT

I've tried to flash both. None work. The soft device should probably be the same (?). I'm using the pre-compiled one that arrives with the SDK. That was working for the 16kb version. I've tried to do a full erase (typing "erase" in Jlink), but I get the same exact error: "****** Error: Failed to download RAMCode!"

RE: Programming MDBT40 with Jlink: Failed to download RAMCode!

wlgrd — Sat, 26 Mar 2016 19:58:01 GMT

Are you sure they have the same softdevice? Also, it says "Downloading file s110.hex", so are you trying to flash the softdevice or the application? Did you do a full erase before trying?