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iMXRT1050 WDog and OpenSDA

Question asked by Henri Laidet on Dec 14, 2018
Latest reply on Dec 20, 2018 by Hui_Ma

Hello,

 

I have a problem on iMXRT1050-EVKB board.


IDE : MCUXpresso IDE v10.2.1 [Build 795]
Debug: OpenSDA included on eval board
App : SDK 2.4.2 WDOG driver application

 

Test WDog application works correctly.

 

I found WDog timout value too large (2 minutes)
then I changed timout for 1 seconde...
The application works like I would like.

 

Problem: Now I can't download a new application by OpenSDA
There is everytime a "Target error from Commit Flash write: Nn(05). Wire ACK Fault in DAP acces".

 

The only possibility I found for downloading a new application is using "PEMicro Multilink Universal" connected on JTAG connector ( and removing J32, J33)

 

When I Tested other SDK applications (except WDog 1seconde), I didn't have any problems with OpenSDA.

 

Is it an OpenSDA problem (bug) or a SWD reduced pin protocol problem?

 

My question:
For a new design, is it necessary to place JTAG connector 20pins(TMS,TCK,TDI,TDO,TRST,SRST,VRef,POW,Gnd)?
Or only SWD wires(SWD_DIO, SWD_CLK, Reset, Gnd)

 

attached screenshot IDE

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