├── .gitignore
├── Dell_hack.ino
└── README.md


/.gitignore:
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 1 | # Object files
 2 | *.o
 3 | *.ko
 4 | *.obj
 5 | *.elf
 6 | 
 7 | # Precompiled Headers
 8 | *.gch
 9 | *.pch
10 | 
11 | # Libraries
12 | *.lib
13 | *.a
14 | *.la
15 | *.lo
16 | 
17 | # Shared objects (inc. Windows DLLs)
18 | *.dll
19 | *.so
20 | *.so.*
21 | *.dylib
22 | 
23 | # Executables
24 | *.exe
25 | *.out
26 | *.app
27 | *.i*86
28 | *.x86_64
29 | *.hex
30 | 
31 | # Debug files
32 | *.dSYM/
33 | 


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/Dell_hack.ino:
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 1 | #define turnOn10 PORTB|=B00000100
 2 | #define turnOff10 PORTB&=B11111011
 3 | 
 4 | #define output10 DDRB|=B00000100
 5 | #define input10  DDRB&=B11111011
 6 | 
 7 | byte CRC=0xFB;
 8 | 
 9 | byte data[3] = { 0x30, 0x39, 0x30};
10 | boolean restarted=false;
11 | unsigned long start=0;
12 | #define restart_time 450
13 | 
14 | boolean read10(){
15 |   byte nkj=PINB;
16 |   nkj&=B00000100;
17 |   if(nkj != 0){
18 |   return 1;
19 |   }else{
20 |     return 0;
21 |   }
22 | }
23 | 
24 | void setup() {
25 | noInterrupts();
26 | DDRB &= B11000000; //reset port
27 | PORTB &= B11000000; //reset port to disable all pull-ups
28 | }
29 | 
30 | void loop() {
31 | 
32 | if(!restarted){ //waiting for restart
33 | 
34 | if(read10() == 0 && start == 0){ //pin goes low and we are not measuring yet
35 | start=micros();
36 | }
37 | if(read10() != 0 && start != 0){ //pin goes high and we are waiting for that
38 | if(micros()-start >= restart_time){ //we have a restart
39 |   restarted=true; 
40 |   delayMicroseconds(30);
41 |   output10;
42 |   turnOff10;
43 |   delayMicroseconds(120);
44 |   turnOn10;  
45 |   input10;
46 | }else{ //we dont have restat yet
47 | start=0;
48 | }
49 | }
50 | }else{ //we have passed restart state
51 | //read crap
52 | for(int k=0; k < 4; k++){ //read skip_rom, readmem, 2 za adresu
53 | for(int i=0; i < 8; i++){
54 | while(read10() != 0);
55 | while(read10() == 0);
56 | }
57 | }
58 | 
59 | //write CRC
60 | for(int i=0; i<8; i++){
61 | if(CRC & 1<<i){ //bit is 1
62 |      while(read10() !=0); //wait zero
63 |      while(read10() ==0); //wait 1
64 |      delayMicroseconds(20);     
65 |   }else{ //bit is 0
66 |     while(read10() !=0);
67 |      output10;
68 |      turnOff10;
69 |      delayMicroseconds(20);
70 |      turnOn10;
71 |      input10;
72 |    }
73 | }
74 | //write data
75 | for(int i=0; i<3; i++){
76 |   for(int j=0; j<8; j++){
77 |   if(data[i] & 1<<j){ //bit is 1
78 |     while(read10() !=0); //wait 0
79 |      while(read10() ==0); //wait 1
80 |      delayMicroseconds(20);
81 |   }else{ //bit is 0
82 |      while(read10() !=0);
83 |      output10;
84 |      turnOff10;     
85 |      delayMicroseconds(20);
86 |     turnOn10;
87 |     input10;    
88 |   }
89 |   }
90 | }
91 | restarted=false; //expect next
92 | } //else !restarted
93 | } //loop
94 | 
95 | 


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/README.md:
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1 | # Hacking-dell-charger
2 | Arduino code for hacking dell charger so laptop think it has 90W dell charger even it does not have
3 | 


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