Sir,
I am working on Cortex-M4 over serial wire debug protocol, i am able to read IDCODE(0x2ba01477) which is correct as per arm cortex m4 technical reference manual, and i am writing 0x50000000 to CTRLSTAT register to enable CSYSPWRUPREQ and CDBGPWRREQ which is also success without any ACK error,but the thing is when i am trying to read the CTRLSTAT register i got 0xffffffff . I don't understand what might be the problem,Please suggest me what would be the problem??
Thanks & Regards
Please try ARMv7-M Architecture Reference Manual. You need to register on ARM web site to download this document.
(ARMv7-M Architecture Reference Manual)
Section C 1.8 for DWT (watchpoint), C 1.11 for FPB (breakpoint) and C 1.6 for debug registers in the processor for halting control.
regards,
Joseph