How to use a J-LINK with ADICUP360

Question

I have been working with the ADICUP360. Awesome tool! I have progressed to where I need to connect the board to my J-LINK probe and am having trouble. I see from the schematics that the 10-pin Cortex debug connector P16 connects to the M360 SWD pins, but also to the on-board SDA interface. How han I force the SDA interface to relinquish contol and allow the J-LINK to control the SWD pins? 
 Thanks in advance!

FormerMember · Accepted Answer

Hi Steve, 
 If you would like to bypass the on board debugger, than you are welcome to do that. Make sure you have the schematic handy, https://wiki.analog.com/_media/resources/eval/user-guides/eval-adicup360/hardware/eval-adicup360_1_.pdf 
 There is a 10-pin ARM cortex connector on the ADICUP360 located at reference designator (P16) as you have already stated. That is the connector where you want to hook up the J-Link device. 
 I don't think you will need to worry about the SDA lines going to the MK20DX128 device, because there is a buffer/tristate device that is in between the MK20DX128 and the ADuCM360. So if you are not using the MK20DX128 as the programmer/debugger, those buffer enable pins (1,4,10) should stay high, allowing no communication to happen. 
 It is important that the jumpers on J3, J4, and J5 are populated when trying to use the J-Link to program from P16. And also make sure that the ribbon cable from the J-Link to the connector is facing the correct way. There are no "keyed" sides of the P16 connector. Here is a drawing I found on the internet showing the connections to the 10-pin connectore, so just make sure you match pin 1 from the ribbon cable of your J-Link with pin 1 of P16. 
 
 Cheers, 
 Brandon)