I've been trying to connect my J-Link Base to a Micoair 405v2 flight controller with no luck. The MA405 has a connector for SWD and I am using a Flying Wire Adapter. The connections are:
MA405 Adapter
SWCLK Pin 9
SWDIO Pin 7
GND GND
3V3 VTREF
When I try and connect using the JLink software, I get the following messages:
J-Link>connect
Please specify device / core. <Default>: STM32F405RG
Type '?' for selection dialog
Device>
Please specify target interface:
J) JTAG (Default)
S) SWD
T) cJTAG
TIF>S
Specify target interface speed [kHz]. <Default>: 4000 kHz
Speed>
Device "STM32F405RG" selected.
Connecting to target via SWD
InitTarget() start
SWD selected. Executing JTAG -> SWD switching sequence.
Error: Failed to initialized DAP.
Can not attach to CPU. Trying connect under reset.
SWD selected. Executing JTAG -> SWD switching sequence.
Error: Failed to initialized DAP.
Connecting to CPU via connect under reset failed.
InitTarget() end - Took 310ms
Connect failed. Resetting via Reset pin and trying again.
InitTarget() start
SWD selected. Executing JTAG -> SWD switching sequence.
Error: Failed to initialized DAP.
Can not attach to CPU. Trying connect under reset.
SWD selected. Executing JTAG -> SWD switching sequence.
Error: Failed to initialized DAP.
Connecting to CPU via connect under reset failed.
InitTarget() end - Took 311ms
Error occurred: Could not connect to the target device.
For troubleshooting steps visit: https://wiki.segger.com/J-Link_Troubleshooting
Jlink command version is V7.96t and the DLL is V7.96t
Any hints or help would be appreciated - Thanks