As this is my first venture into eprom, and I understand how to change the value and number of digits prior to compiling, my question is this: once the chip is programmed, is the eprom value fixed, or can it be changed?
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One more question
As this is my first venture into eprom, and I understand how to change the value and number of digits prior to compiling, my question is this: once the chip is programmed, is the eprom value fixed, or can it be changed?
If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
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Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants - but debt is the money of slaves
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There simply is no "Happy Spam" If you do it you will disappear from this forum.
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Do you mean the on chip eeprom (which would be easier to use and is documented in the manual and is the method I'd use) or actual program flash (which would take a bit more code and would be harder)?Originally Posted by Joe S.
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RTFMRTFMRTFM
RTFMRTFMRTFMRTFMRTFMRTFMRTFMRTFMRTFMRTFM
RTFMRTFMRTFMRTFMRTFMRTFMRTFMRTFMRTFMRTFM
RTFMRTFMRTFMRTFMRTFMRTFMRTFM . . .Darn it skimask, I got some records that do that
I'm goin' to take that as a yes, use the write command. What
I think I am trying to do is change the combination on a chip
that is already programmed with this program. SO to clarify
my question, how the heck would I do that? Would it require
another loop or a serin write, Black Cat bones?
If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
.
Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants - but debt is the money of slaves
.
There simply is no "Happy Spam" If you do it you will disappear from this forum.
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No, no, no, I didn't mean for you to RTFM...this time I was only pointing it out, making sure.RTFMRTFMRTFM
RTFMRTFMRTFMRTFMRTFMRTFMRTFMRTFMRTFMRTFM
RTFMRTFMRTFMRTFMRTFMRTFMRTFMRTFMRTFMRTFM
RTFMRTFMRTFMRTFMRTFMRTFMRTFM . . .Darn it skimask, I got some records that do that
I'm goin' to take that as a yes, use the write command. What
I think I am trying to do is change the combination on a chip
that is already programmed with this program. SO to clarify
my question, how the heck would I do that? Would it require
another loop or a serin write, Black Cat bones?
I think I would set it up with a 'stock' combo when you program it set up in eeprom, say 12345 (that's amazing, I've got the same combination on my luggage!)...
Then, there's one sequence of numbers that only you know and will never tell anybody (call it a 'back door')...say, 1234567890.. If you get that sequence, the system knows that the next 5 numbers input will be the new combination and you have to enter them twice. Then save those new 5 numbers in the eeprom (read, write), and BAM the combo is changed.
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Clever Idea, backdoor . . . like in WAR GAMES . . and I bet you thought I was going to make some jokes, That's going to be too much brain damage for now, tomorrow when I'm fresh, I will throw some spaghetti on the stove, and see what cooks out of it
Maybe if I am lucky sayzer or mister_e will send me some coffee
Thanks
JS
If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
.
Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants - but debt is the money of slaves
.
There simply is no "Happy Spam" If you do it you will disappear from this forum.
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Yep, that's what I was talking about...but not nearly as vocal (Shall we play a game?)Clever Idea, backdoor . . . like in WAR GAMES . . and I bet you thought I was going to make some jokes
Thanks
JS
But I just had another thought or eight...
You could keep all the code you've got and just add an extra couple of flags so you could go thru the loop an extra time or two. If you go thru the loop once and get the 1st half of the back door (12345), you set the flag. Then the next number is a 6. Since the flag is set, you start looking for the 2nd half of the back door, etc.etc.etc. Or just write a whole seperate block of code to handle it.
Or maybe even have another 5 digit code that has to be set while the gate is open. Then the gate stays open while you change the code. That way if you screw it up, at least the gate is open. Or maybe during that time, you forget about the keypad read code and manually scan the keypad for a multiple keypress (say 1-2-3-4 all at the same time)....
Lots of options...
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Yep, lots of options . . most of them are still above my pay grade, metephoricly speaking. I'll slog along and throw out some snippets as I do for comment or correction. I have learned a great deal from this thread, I hope lots of newbies read and understand what's in it, not just siphon the code. I think Darrel set this code up partially to do that as there is mention of High Security and Low security in the setup. Anywho, I'm getting some ideas, in my thick noggin' and I better go write them down!
JS
If you do not believe in MAGIC, Consider how currency has value simply by printing it, and is then traded for real assets.
.
Gold is the money of kings, silver is the money of gentlemen, barter is the money of peasants - but debt is the money of slaves
.
There simply is no "Happy Spam" If you do it you will disappear from this forum.
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