Comments (8)
aallan
commented on July 17, 2024
5
I think this is the correct wiring SWD debug using FT2232, but I haven't checked it for accuracy.
Update: Should wire the SWD GND pin to GND, and also to physical pin 3 (GND nearest the UART)
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kilograham
commented on July 17, 2024
3
But yes, it should work
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nyh-workshop
commented on July 17, 2024
3
Hello team, I've tested it again. I have to jiggle the wires and reconnect again. The diagram by @aallan is working fine.
$ openocd -f tcl/interface/ftdi/ft232h-module-swd.cfg -f tcl/target/rp2040.cfg
Open On-Chip Debugger 0.10.0+dev-g7c96119-dirty (2021-01-25-21:56)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
Info : FTDI SWD mode enabled
adapter speed: 8 kHz
Info : Hardware thread awareness created
Info : Hardware thread awareness created
Info : RP2040 Flash Bank Command
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Error: libusb_open() failed with LIBUSB_ERROR_NOT_SUPPORTED
Info : clock speed 8 kHz
Info : SWD DPIDR 0x0bc12477
Info : SWD DLPIDR 0x00000001
Info : SWD DPIDR 0x0bc12477
Info : SWD DLPIDR 0x10000001
Info : rp2040.core0: hardware has 4 breakpoints, 2 watchpoints
Info : rp2040.core1: hardware has 4 breakpoints, 2 watchpoints
Info : starting gdb server for rp2040.core0 on 3333
Info : Listening on port 3333 for gdb connections
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jimbojr
commented on July 17, 2024
2
Yes use adjacent GNDs for UART and SWD for best signal integrity. Multiple GND pins are useful - who knew... :-)
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aallan
commented on July 17, 2024
Thanks @kilograham
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aallan
commented on July 17, 2024
Thinking about it, I think the SWD GND pin should also be wired. Doesn't SWD need its own GND?
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dp111
commented on July 17, 2024
It may work without its own ground, but please use its own ground
…On Tue, 26 Jan 2021 at 15:01, Alasdair Allan ***@***.***> wrote:
Thinking about it, I think the SWD GND pin should also be wired. Doesn't
SWD need its own GND?
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dp111
commented on July 17, 2024
The same with the UART use Pin3 as well of Pico
On Tue, 26 Jan 2021 at 15:35, Dominic Plunkett <[email protected]>
wrote:
… It may work without its own ground, but please use its own ground
On Tue, 26 Jan 2021 at 15:01, Alasdair Allan ***@***.***>
wrote:
> Thinking about it, I think the SWD GND pin should also be wired. Doesn't
> SWD need its own GND?
>
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> You are receiving this because you are subscribed to this thread.
> Reply to this email directly, view it on GitHub
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