On CC32xx family of devices, sysrequest is disabled, and
vectreset is blocked by the boot loader (stops in a while(1)
statement). srst reset can leave the target in a state
that prevents debug.
This change enables using vectreset on SF variants by
moving the PC to the start of the user application in
internal flash. This allows for a more reliable reset,
but with two caveats:
1) This only works for the SF variant with internal
flash.
2) This only resets the CPU and not any peripherals.
Tested on CC3220SF rev B Launchpad in both SWD and
JTAG modes. Confirmed proper behavior of reset,
reset init, reset halt, and reset run commands.
Update: reworked per comment in code review. Re-tested
with CC3220SF Launchpad as both CC3220SF and as
CC32xx board to confirm reset behavior as expected.
Update: Added adapter srst delay 1100 line to the
CC3200 LaunchXL configuration file.
Change-Id: Ibc042d785c846c2223ae55b8f2410b75ed2df354
Signed-off-by: Edward Fewell <efewell@ti.com>
Reviewed-on: http://openocd.zylin.com/5489
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
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