AnsweredAssumed Answered

iMXRT1050 WDog and OpenSDA

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



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