Commander: prevent accessing core registers unless core is halted.
Commander: prevent accessing core registers unless core is halted.

mesheven/pyOCD,mbedmicro/pyOCD,mbedmicro/pyOCD,pyocd/pyOCD,flit/pyOCD,mbedmicro/pyOCD,mesheven/pyOCD,pyocd/pyOCD,mesheven/pyOCD,flit/pyOCD