lpcware

Shared SWD-bus (multi-drop)

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by Harrie on Thu Feb 18 05:31:59 MST 2016
Without result so far, I have made several attempts to share a single SWD-bus to debug two LPC11Cxx MCUs.

Debugging in LPCXpresso works fine with a single MCU on the PCB, however when the second MCU is added the I get the following error.

[color=#f00]Target error from Register access: Nn(05). ACK Fault
terminating on communication loss: Pipe has been closed by GDB.[/color]


If possible, I would like to know how to create a shared SWD-bus as discribed in the link below?

http://web.archive.org/web/20150321140036/http://www.arm.com/files/pdf/Low_Pin-Count_Debug_Interfaces_for_Multi-device_Systems.pdf

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