| 1 | //Source: http://dduino.blogspot.com/2011/11/arduino-ps2-emulator-computer-control.html |
| 2 | |
| 3 | //KBD stuff |
| 4 | #include "ps2dev.h" // to emulate a PS/2 device |
| 5 | PS2dev keyboard(19,18); // PS2dev object (2:data, 3:clock) |
| 6 | int enabled = 0; // pseudo variable for state of "keyboard" |
| 7 | unsigned char c; //char stores data recieved from computer for KBD |
| 8 | |
| 9 | //Sonar stuff |
| 10 | |
| 11 | void ack() |
| 12 | { |
| 13 | //acknowledge commands |
| 14 | while(keyboard.write(0xFA)); |
| 15 | } |
| 16 | |
| 17 | int keyboardcommand(int command) |
| 18 | { |
| 19 | unsigned char val; |
| 20 | switch (command) |
| 21 | { |
| 22 | case 0xFF: //reset |
| 23 | ack(); |
| 24 | //the while loop lets us wait for the host to be ready |
| 25 | while(keyboard.write(0xAA)!=0); |
| 26 | break; |
| 27 | case 0xFE: //resend |
| 28 | ack(); |
| 29 | break; |
| 30 | case 0xF6: //set defaults |
| 31 | //enter stream mode |
| 32 | ack(); |
| 33 | break; |
| 34 | case 0xF5: //disable data reporting |
| 35 | //FM |
| 36 | enabled = 0; |
| 37 | ack(); |
| 38 | break; |
| 39 | case 0xF4: //enable data reporting |
| 40 | //FM |
| 41 | enabled = 1; |
| 42 | ack(); |
| 43 | break; |
| 44 | case 0xF3: //set typematic rate |
| 45 | ack(); |
| 46 | keyboard.read(&val); //do nothing with the rate |
| 47 | ack(); |
| 48 | break; |
| 49 | case 0xF2: //get device id |
| 50 | ack(); |
| 51 | keyboard.write(0xAB); |
| 52 | keyboard.write(0x83); |
| 53 | break; |
| 54 | case 0xF0: //set scan code set |
| 55 | ack(); |
| 56 | keyboard.read(&val); //do nothing with the rate |
| 57 | ack(); |
| 58 | break; |
| 59 | case 0xEE: //echo |
| 60 | //ack(); |
| 61 | keyboard.write(0xEE); |
| 62 | break; |
| 63 | case 0xED: //set/reset LEDs |
| 64 | ack(); |
| 65 | keyboard.read(&val); //do nothing with the rate |
| 66 | Serial.print("LEDs: "); |
| 67 | Serial.println(val, HEX); |
| 68 | digitalWrite(LED_BUILTIN, val); |
| 69 | ack(); |
| 70 | break; |
| 71 | } |
| 72 | return 0; |
| 73 | } |
| 74 | |
| 75 | void setup() |
| 76 | { |
| 77 | // send the keyboard start up |
| 78 | while(keyboard.write(0xAA)!=0); |
| 79 | delay(10); |
| 80 | // initialize the serial port: |
| 81 | Serial.begin(9600); |
| 82 | pinMode(LED_BUILTIN, OUTPUT); |
| 83 | } |
| 84 | |
| 85 | void loop() |
| 86 | { |
| 87 | //if host device wants to send a command: |
| 88 | if(keyboard.available()) |
| 89 | { |
| 90 | while(keyboard.read(&c)); |
| 91 | //delay(100); |
| 92 | keyboardcommand(c); |
| 93 | //delay(100); |
| 94 | //c = 0; |
| 95 | } |
| 96 | |
| 97 | |
| 98 | delay(1000); |
| 99 | |
| 100 | keyboard.write(0x16); |
| 101 | keyboard.write(0xF0); |
| 102 | keyboard.write(0x16); |
| 103 | Serial.print('.'); |
| 104 | |
| 105 | //delay(1000); |
| 106 | |
| 107 | |
| 108 | } |