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Problem
Transferring firmware files via the drag-and-drop interface takes a long time (much longer than
expected)
Possible Resolution
This can be caused if the file is trying to write to QSPI/SPI flash and there is no flash attached, or
there may be other hardware on these pins and the module is causing a voltage conflict.
Try disabling QSPI/SPI flash access by creating an empty file
qspi_off.cfg
and copying it to the
virtual flash drive.
Problem
After using pyOCD, SWD access or other functionality is not working.
Possible Resolution
At time of writing with pyOCD version 0.29.0, there appears to be a bug in that SWD is not
configured but is dis-configured in some circumstances. There is currently no known workaround for
this issue other than by disconnecting and reconnecting the USB-SWD programmer to the
computer.
Problem
Data is being transmitted or received on the UART but is not visible on the host PC.
Possible Resolution
Check that the J35 header has a jumper on it. If there is no jumper, the UART lines are
disconnected from the target device/header. Check that the voltage source and level is correctly set
for the module to which it is connected. If one side is operating at 1.8v and the other at 3.3v then
UART communication is not possible.