pato-z80-home-computer/prototiping-with-arduino/ps2-keyb-controller-test/ps2-keyb-controller-test.ino

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Arduino
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2021-02-12 12:19:19 +01:00
/* PS/2 Keyboard controller debugger */
#define EN 2
const byte DATA_BUS[] = {10, 9, 8, 7, 6, 5, 4, 3};
void setup() {
pinMode(EN, INPUT);
for(int pin=0; pin < 8; pin++) {
pinMode(DATA_BUS[pin], INPUT);
}
Serial.begin(57600);
Serial.println("PS/2 keyboard controller debugger");
Serial.println("DATA BUS HEX EN");
attachInterrupt(digitalPinToInterrupt(EN), onClk, FALLING);
}
void loop() {}
void onClk() {
unsigned int data = 0;
for(int pin=0; pin < 8; pin++) {
byte b = digitalRead(DATA_BUS[pin]) ? 1 : 0;
Serial.print(b);
data = (data << 1) + b; // Shifta di 1 e aggiunge il bit corrente. Serve per ricostruire il numero da binario
}
char output[50] = {};
sprintf(output, " 0x%02x %c",
data,
digitalRead(EN) ? 'D' : 'I'
);
Serial.println(output);
}