PORTS Forum
Ports and Interfaces => Other Interfaces => Topic started by: mkjohnson84655 on February 19, 2016, 07:34:23 pm
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Hi Jan..
Well I finally retired and can not pursue all my hobby's one of which is microcontrollers.
I've put off putting together your 8052 basic circuit until now.. lol
After bread boarding Figures 3-1 and 4-3 I powered it up.
yeah, received the sign on.
wrote a quick program to loop 10 times and print the loop value.
that works great.
Set MTOP to 7FFFh as I'm using a 32k sram.
My NVRam is a Dallas DS1225AB.
However when I do a PROG or FPROG I just get the number 1 followed by ERROR: Programming.
like this
>prog
1
ERROR PROGRAMMING
READY
>
I've doubled checked all the wiring and its exactly as fig 4-3 shows. Pins 20,22,27 are all toggling.
Any Ideas?
Great book.
thanks
Mike
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The only thing that comes to mind is that the memory chip isn't working or there is a bad connection somewhere - the wiring looks ok but isn't connecting.
The fact that you can run programs is a good sign.
Sorry I don't have anything more specific.
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Thanks for the reply.. I keep looking then.
later
Mike