| ??? 07/14/12 04:35 Read: times |
#187930 - Master Code Responding to: ???'s previous message |
Sine I am designing around PIC which has a built in EEPROM, so it also required to store a checksum/CRC byte to internal EEPROM or only four digit code sufficient?
In this system there will be two code, one is user code and second is master code. Both the codes are of four digits. If user code is forgotten then by master code person can open a safe. I want to know since PIC has a inbuilt EEPROM so still in this case checksum/CRC is necessary or without it. For development purpose I am using PIC16F886 which is 28 pin device but for final I will use low pin count PIC like PIC16F690. |
| Topic | Author | Date |
| Password in EEPROM | 01/01/70 00:00 | |
| Checksum | 01/01/70 00:00 | |
| 8-digit code | 01/01/70 00:00 | |
| Master Code | 01/01/70 00:00 | |
| So what does the requirements spec say? | 01/01/70 00:00 | |
| master codes .... | 01/01/70 00:00 | |
| This is a low-security lock - or no measly 4-digit PIN | 01/01/70 00:00 | |
| language | 01/01/70 00:00 | |
| just a thought | 01/01/70 00:00 | |
| Never give access when locked | 01/01/70 00:00 | |
| PIN + PUK | 01/01/70 00:00 | |
| The eeprom doesnt hold the password | 01/01/70 00:00 | |
High/low security | 01/01/70 00:00 |