SERIAL_EEPROM_ID_PASSWD.zip_Communicating_EEPOROM

/******************************************************************* TEST ASSIGNMENT () FileName : EEPMtest.c Target : ATmega128 Project : ON CHIP ADC TEST Author : Hardik Shah Clock frequency : 16Mhz Dated : 19th May 2008 Description : a security system with user login. Use internal EEPROM to store valid passwords (numeric). Let the user enter his password using an external interrupt. At the start of the program compare a password entered by the user. (Hint: Use appropriate fuse settings) *******************************************************************/ #include<avr/io.h> #include<EEPROM_ATM128.h> #include<stdio.h> #include<Serial.h> void NewAccount(void); void VerifyAccount(void); int main(void) { unsigned char scan_serial; Serial_Init(); print_string("-----------------System Init------------------"); EEPROM_write(0x5,0x1); /* cli(); //clear interrupts // Enabling external interupt INT5 EICRB = 0xC0; EIMSK = 0x20; sei(); //set interrupts */ while(1) { print_string("\nEnter 1 for New Account"); print_string("\nEnter 2 for Verify Account"); print_string("\n:"); while(1) { scan_serial = USART_Receive(); USART_Transmit(scan_serial); //print the received byte if(scan_serial == '1' ||scan_serial == '2') break; else print_string("\nERROR!!!! Enter the displayed option\n:"); } switch(scan_serial) { case '1': NewAccount(); break; case '2': VerifyAccount(); break; } } /* while(1) { } */ } void NewAccount(void) { char accid[8]; //8 bytes char accpasswd[8]; //8 bytes char strtmp[50]; char count = 0; unsigned char E_readid; int startWriteAddr; for(count=0;count<=7;count++) { accid[count] = '\0'; accpasswd[count] = '\0'; } print_string("\nEnter the Name of the Account : "); count=0; do { accid[count] = USART_Receive(); //store the received byte USART_Transmit(accid[count]); //print the received byte count++; } while(accid[count-1] != '\r' && count < 7); if(count==7) while(USART_Receive() != '\r'); else accid[count-1] = '\0'; print_string("\nEnter the Password : "); count = 0; do { accpasswd[count] = USART_Receive(); //store the received byte USART_Transmit('$'); //print the received byte count++; } while(accpasswd[count-1] != '\r' && count < 7); if(count==7) while(USART_Receive() != '\r'); else accpasswd[count-1] = '\0'; /////////////////////////////////////////////////////////////////////////////////////// //void EEPROM_write(unsigned int uiAddress, unsigned char ucData); //unsigned char EEPROM_read(unsigned int uiAddress); //read the total no. of users E_readid = EEPROM_read(0x5); if(E_readid==0xFF) { print_string("\nCANNOT REGISTER MAX FULL MEM"); //break;//users full } //assing the address startWriteAddr = E_readid * 0x10; #ifdef DEBUG_ON sprintf(strtmp,"\nSTART ADDR = 0x%04x EEPROM AT 0x5 = %d",startWriteAddr,E_readid); print_string(strtmp); #endif //write to that address id n password /////// count = 0; do { #ifdef DEBUG_ON sprintf(strtmp,"\n0x%04x = %c",startWriteAddr,accid[count]); print_string(strtmp); #endif EEPROM_write(startWriteAddr++,accid[count]); //USART_Transmit(accid[count]); //print the received byte count++; } while(count<=7); count = 0; do { #ifdef DEBUG_ON sprintf(strtmp,"\n0x%04x = %c",startWriteAddr,accpasswd[count]); print_string(strtmp); #endif EEPROM_write(startWriteAddr++,accid[count]); //USART_Transmit(accpasswd[count]); //print the received byte count++; } while(count<=7); ////// //incremaent n store id EEPROM_write(0x5,++E_readid); /* print_string("\nThe Entered ID is : "); count = 0; while(accid[count] != '\0') { USART_Transmit(accid[count]); //print the received byte count++; } print_string("\nThe Entered Password is : "); count = 0; while(accpasswd[count] != '\0') { USART_Transmit(accpasswd[count]); //print the received byte count++; } */ } void VerifyAccount(void) { char accid[10]; char accpasswd[10]; char strtmp[50]; char count = 0; int startreadAddr; char E_ReadByte; char startid; char verifyfailed; unsigned char E_readmaxid; char gofornext = 0; for(count=0;count<=7;count++) { accid[count] = '\0'; accpasswd[count] = '\0'; } print_string("\nEnter the Name of the Account : "); count=0; do { accid[count] = USART_Receive(); //store the received byte USART_Transmit(accid[count]); //print the received byte count++; } while(accid[count-1] != '\r' && count < 7); if(count==7) while(USART_Receive() != '\r'); else accid[count-1] = '\0'; print_string("\nEnter the Password : "); count = 0; do { accpasswd[count] = USART_Receive(); //store the received byte USART_Transmit('$'); //print the received byte count++; } while(accpasswd[count-1] != '\r' && count < 7); if(count==7) while(USART_Receive() != '\r'); else accpasswd[count-1] = '\0'; /////////////////////////////////////////////////////////////////////////////////////// //extract the no. of id's present //search from start till last id present //if found the match with the id then go for password checking //else failed display the message as verification failed E_readmaxid = EEPROM_read(0x5); //assing the address verifyfailed = 0; for(startid = 1;startid < E_readmaxid;startid++) { startreadAddr = startid * 0x10; count = 0; do { E_ReadByte = EEPROM_read(startreadAddr); #ifdef DEBUG_ON sprintf(strtmp,"\nID 0x%04x = %02x accid[%d] = %c",startreadAddr,E_ReadByte,count,accid[count]); print_string(strtmp); #endif if(E_ReadByte == accid[count]) { startreadAddr++; count++; } else { gofornext =1; break; } } while(count <= 7); if(gofornext) { gofornext = 0; continue; } count = 0; do { E_ReadByte = EEPROM_read(startreadAddr); #ifdef DEBUG_ON sprintf(strtmp,"\nPD 0x%04x = %02x accpd[%d] = %c",startreadAddr,E_ReadByte,count,accpasswd[count]); print_string(strtmp); #endif if(E_ReadByte == accpasswd[count]) { startreadAddr++; count++; } else { verifyfailed = 1; break; } } while(count <= 7); break; } if(startid==E_readmaxid) { print_string("\nINVAILD NO RECORDS FOUND"); } else if(verifyfailed) { print_string("\nVERIFYING PASSWORD FAILED"); } else { print_string("\nSUCCESS ON VERIFY"); } } /* ISR(INT5_vect) { print_string(" IN ISR5 "); cli(); } */