"Single" core STM32WLE still sees AP1 but on first scan aborts gracefully
after some errors and on later runs sees AP1 as unusable. Fixes#832.
Decode the Cross trigger interface found on CPU2 on STM32WBxx.
E.g on STM32WXXX AP1 with C2BOOT not set, the AP base registers have valid
values but reading them fails and turns the AP unusable. BMDA reading CIDR
with multiple calls will will loop and finally hang up BMD. Other target
devices may show similar behaviour.
Reading CIDR with a single call allows recovery from in that case and
additional spares target transactions.
Workaround for CMSIS-DAP/Bulk debugger orbtrace that returns NO_ACK
with high values of TRNCNT. Perhaps only STM32F767 needs write to DHCSR
with high occupancy to catch the device in a moment not sleeping.
Stlink does not like low level access and aborts with STLINK_SWD_DP_ERROR.
Either our implementation still has faults or stlink can not handle
MINDP devices with BMP/Firmware also seemm not to like low level access,
either du to some hidden error in BMP or by design
E.g. AP1 on a STM32WLE5 points to a ROM table, but access to the ROM table
via AP1 hangs forever.
- Substantial reduce timeout when wait for a response. Valid access should
succeed fast.
- Abort AP access to free DP for other accesses
- Don't throw exception, only set dp->fault
- React on higher level
- RP2040 show both DPs
- Multidrop test with STM32L552 and STM32H745 allows selection
with "-m 0x4500041" (H7), "-m 1" (L552) or "-m 0x01002927" (RP2040)
This adds a TRY_CATCH around the adiv5_ap_read_id() in
adiv5_component_probe() and resets the DP when that happens.
It seems like the STM32WLE5 comes with the AP of the inactive core
enabled in a way that does not make it detectable, and the current code
times out and leaves the whole device hanging.
Catching the timeout and calling adiv5_dp_abort() seems to restore the
device to a useable state.
Tested on Seed LoRa-E5 (STM32E5JC).
STM32WLE5 has the same dual core chip as STM32WL5. For the second
core, the additional AP can be see, but access to e.g. CIDR0 for that
Romtable fails.
Aborting the scan too if again the second read of CIDR0 fails makes
sense anyways!
dragonmux
ylm
Rafael Silva
Uwe Bonnes
Koen De Vleeschauwer
Björn Mellström
James Turton
Fabio Baltieri