blink a single led

[MINHLE]

TKS for ur reply,
no way. power supply and every thing is ok
the chip was programmed a month ago is ok (on the bread board and on the circuit), just after last month, every thing is corrupted ( even on the sam breadboard connection or the same pcb)
i reprogram mplab and pbp but no help

[towlerg]

What has changed on the PC and programmer? In post#1 you said "programmer is just updated to 5.1 last night". if you mean that you updated the firmware in the programmer, then try reverting to the previous version.

BTW RMW hardly an issue with 1 sec between writes.

[Art]

The program writes the entire port anyway

[MINHLE]

tks all,
after several attempts during a month, i tried to update the programmer firmware just a day ago.

[MINHLE]

HELLO,
HOW CAN I VERYFY a progrmmer be good or bad?
after reading the hex file from the chip,
the hex file from the compiler seems identical to that of re-reading from the chip.

in other articles in the forum also mentioned this.
such as mplab rewrite a new way of writing fuses

CONFIG FOSC = INTIO67, FCMEN = OFF, IESO = OFF
instead of
__CONFIG _CONFIG1H, _FOSC_INTIO67_1H &..
when the compiler compile the pbp file which 1 is included
i add the second way to the beginnig of a program:
__CONFIG _CONFIG1H, _FOSC_INTIO67_1H &..
is that the reason the program to be shut down?
any help i do appriciate,
thks

[richard]

HOW CAN I VERYFY a progrmmer be good or bad?

erase "blank" the chip , verify chip is blank
reprogram chip , verify program against hex file

[MINHLE]

TKS FOR YOUR REPLY,
I did it maytimes but in vain,

the chip was programmed before a month a go run well on both breadboard and pcb
but the chip programmed (the same program) later has not run at all on both breadboard and pcb
now program is reduce to a signle led to be easy to control but not run at all.
this happened some years ago but now i forgot how to fix it (nothing to fix as i remember) but now i have to find out the root of a problem