Post by thread:[PIC]: safe safe

One of my first projects was to make a "safe" safe. I have two pic16f84a inside a safe, the first pic scans the keypad and controls passwords on the safe and send a code to the second pic that checks the safe's "attack" status and drives a servo, led's and a buzzer. Are there a "safe" way to unprotect code on a 16f84a. If there are please let me know...I have access to the first pic's serial programming pins(GND, Vcc, Mclr, RB6, RB7) and the other pins that is connected to the keypad. The owner of the safe lost his user and master pin and I have long ago discard the hard coded master pin... To override the first pic with a new program will also not work, because I also do not have the hard coded pin on the second pic. If I can get around the protection bit, I would be able to read the information on the pic to open the safe again. Regards Francois spam_OUTfr10TakeThisOuTmweb.co.za -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

> One of my first projects was to make a "safe" safe. > > I have two pic16f84a inside a safe, the first pic scans the keypad and > controls passwords on the safe and send a code to the second pic that checks > the safe's "attack" status and drives a servo, led's and a buzzer. > > Are there a "safe" way to unprotect code on a 16f84a. If there are please > let me know...I have access to the first pic's serial programming pins(GND, {Quote hidden}> Vcc, Mclr, RB6, RB7) and the other pins that is connected to the keypad. > > The owner of the safe lost his user and master pin and I have long ago > discard the hard coded master pin... > > To override the first pic with a new program will also not work, because I > also do not have the hard coded pin on the second pic. > > If I can get around the protection bit, I would be able to read the > information on the pic to open the safe again. It makes no sense to persue this. Succeeding would only prove that you did a poor job the first time around. How is anyone supposed to trust you in the future if you show them how you could have cracked your own safe all along? ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, .....olinKILLspam@spam@embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

>It makes no sense to persue this. Succeeding would only prove that you did >a poor job the first time around. How is anyone supposed to trust you in >the future if you show them how you could have cracked your own safe all >along? But hey.. if you can't pick your own lock perhaps you really do have a future in the biz :-) Regards, James Caska caskaKILLspamvirtualbreadboard.com, http://www.virtualbreadboard.com ujVM - 'The worlds smallest java virtual machine' {Original Message removed}

What is the penalty for a wrong code entered? If there is no penalty, use another pic to interface with the keypad to try all combinations. -Adam Francois Robbertze wrote: {Quote hidden}>One of my first projects was to make a "safe" safe. > >I have two pic16f84a inside a safe, the first pic scans the keypad and >controls passwords on the safe and send a code to the second pic that checks >the safe's "attack" status and drives a servo, led's and a buzzer. > >Are there a "safe" way to unprotect code on a 16f84a. If there are please >let me know...I have access to the first pic's serial programming pins(GND, >Vcc, Mclr, RB6, RB7) and the other pins that is connected to the keypad. > >The owner of the safe lost his user and master pin and I have long ago >discard the hard coded master pin... > >To override the first pic with a new program will also not work, because I >also do not have the hard coded pin on the second pic. > >If I can get around the protection bit, I would be able to read the >information on the pic to open the safe again. > >Regards > >Francois >.....fr10KILLspam.....mweb.co.za > >-- >http://www.piclist.com hint: PICList Posts must start with ONE topic: >[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads > > > > > -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads