C readCapacitivePin 代做代写

日期：2018-05-10 07:18

int ledPin = 12;

int capval1;

int capval2;

int capval3;

int capval4;

int capval5;

int capval6;

int capval7;

int capval8;

void setup()

{

 pinMode(ledPin, OUTPUT);

}

void loop ()

{

 digitalWrite(ledPin,LOW);

 capval1 = readCapacitivePin(3);

 capval2 = readCapacitivePin(4);

 capval3 = readCapacitivePin(5);

 capval4 = readCapacitivePin(6);

 capval5 = readCapacitivePin(7);

 capval6 = readCapacitivePin(8);

 capval7 = readCapacitivePin(9);

 capval8 = readCapacitivePin(10);

 if (capval1 > 2)

 {

   tone(ledPin,262,10);

 }

 if (capval2 > 2)

 {

   tone(ledPin,294,10);

 }

 if (capval3 > 2)

 {

   tone(ledPin,330,10);

 }

 if (capval4 > 2)

 {

   tone(ledPin,350,10);

 }

 if (capval5 > 2)

 {

   tone(ledPin,393,10);

 }

 if (capval6 > 2)

 {

   tone(ledPin,441,10);

 }

 if (capval7 > 2)

 {

   tone(ledPin,495,10);

 }

 if (capval8 > 2)

 {

   tone(ledPin,525,10);

 }

}

uint8_t readCapacitivePin(int pinToMeasure)

{

 // Variables used to translate from Arduino to AVR pin naming

 volatile uint8_t* port;

 volatile uint8_t* ddr;

 volatile uint8_t* pin;

 // Here we translate the input pin number from

 // Arduino pin number to the AVR PORT, PIN, DDR,

 // and which bit of those registers we care about.

 byte bitmask;

 port = portOutputRegister(digitalPinToPort(pinToMeasure));

 ddr = portModeRegister(digitalPinToPort(pinToMeasure));

 bitmask = digitalPinToBitMask(pinToMeasure);

 pin = portInputRegister(digitalPinToPort(pinToMeasure));

 // Discharge the pin first by setting it low and output

 *port &= ~(bitmask);

 *ddr |= bitmask;

 delay(1);

 // Make the pin an input with the internal pull-up on

 *ddr &= ~(bitmask);

 *port |= bitmask;

// Now see how long the pin to get pulled up. This manual unrolling of the loop

// decreases the number of hardware cycles between each read of the pin,

// thus increasing sensitivity.

uint8_t cycles = 17;

if (*pin & bitmask)

{ cycles = 0;}

else if (*pin & bitmask)

{ cycles = 1;}

else if (*pin & bitmask)

{ cycles = 2;}

else if (*pin & bitmask)

{ cycles = 3;}

else if (*pin & bitmask)

{ cycles = 4;}

else if (*pin & bitmask)

{ cycles = 5;}

else if (*pin & bitmask)

{ cycles = 6;}

else if (*pin & bitmask)

{ cycles = 7;}

else if (*pin & bitmask)

{ cycles = 8;}

else if (*pin & bitmask)

{ cycles = 9;}

else if (*pin & bitmask)

{ cycles = 10;}

else if (*pin & bitmask)

{ cycles = 11;}

else if (*pin & bitmask)

{ cycles = 12;}

else if (*pin & bitmask)

{ cycles = 13;}

else if (*pin & bitmask)

{ cycles = 14;}

else if (*pin & bitmask)

{ cycles = 15;}

else if (*pin & bitmask)

{ cycles = 16;}

// Discharge the pin again by setting it low and output

// It's important to leave the pins low if you want to

// be able to touch more than 1 sensor at a time - if

// the sensor is left pulled high, when you touch

// two sensors, your body will transfer the charge between

// sensors.*port &= ~(bitmask);*ddr |= bitmask;

return cycles;}