AN12037 for the LPC51U68 getting Ef(50): Flash driver failed to initialize error

[BetoGreen]

I am porting AN12037 to a 51u68 demo board.

1. starting with app_blinky, I changed the memory for the 51U68

MFlash256 (rx) : ORIGIN = 0x2000, LENGTH = 0x1E000 /* 120K bytes (alias Flash) */
Ram0_32 (rwx) : ORIGIN = 0x20000200, LENGTH = 0x1c00 /* 7K bytes (alias RAM) */
Ram1_2 (rwx) : ORIGIN = 0x04000000, LENGTH = 0x800 /* 2K bytes (alias RAM2) */
Ram2USB_2 (rwx) : ORIGIN = 0x04004000, LENGTH = 0x800 /* 2K bytes (alias RAM3) */

and

app_blinky_Debug_memory.ld to same.

also changed  app_blinky_Debug_SencondImage.ld to start at 0x20000

2. I changed the cpu from 11u6x to 51u68 for the project

3.  UART Console is checked in Debug console

4. Debug probe = "LinkServer" = successfully booted

When I try to debug or use GUi flash tool and I get the error Ef(50): Flash driver failed to initialize.

My demo board works fine when I switch to other projects I created. It seems to be only the app_blinky project that gives this error.  Any Ideas?

[BetoGreen · Accepted solution]

I tried all the Reset Handling settings with no success.

I fixed it by holding the ISP0 button,  connecting USB then pressing reset. 

[BetoGreen]

I changed the Run/debugger settings for LinkServer Debugger to "Default" along with changing MCU settings flashdriver to LPC51U6x_256K.cfx and that seemed to work.  

But...Now when I try to debug I get  a window saying

SWD Configuration

0 available SWD Devices detected.
Connect a device and try again.

[Alice_Yang]

Please confirm have disconnect all the previous debug using "Clean Up Debug" button:

If still can't work, please take a video or screenshots show all your steps.

Regards,

Alice

[Alice_Yang]

Hello BetoGreen,

If you use MCUXpresso IDE, how about 

launch configuration "Reset Handling" setting is intended as SYSRESETREQ.

Regards,

Alice