{

_receivePin = receivePin;

_transmitPin = transmitPin;

_baudRate = 0;

{

_baudRate = speed;

_bitPeriod = 1000000 / _baudRate;

digitalWrite(_transmitPin, HIGH);

delayMicroseconds( _bitPeriod); // if we were low this establishes the end

{

int val = 0;

int bitDelay = _bitPeriod - clockCyclesToMicroseconds(50);

// one byte of serial data (LSB first)

// ...--\ /--\/--\/--\/--\/--\/--\/--\/--\/--...

// \--/\--/\--/\--/\--/\--/\--/\--/\--/

// start 0 1 2 3 4 5 6 7 stop

while (digitalRead(_receivePin));

// confirm that this is a real start bit, not line noise

if (digitalRead(_receivePin) == LOW) {

// frame start indicated by a falling edge and low start bit

// jump to the middle of the low start bit

delayMicroseconds(bitDelay / 2 - clockCyclesToMicroseconds(50));

// offset of the bit in the byte: from 0 (LSB) to 7 (MSB)

for (int offset = 0; offset < 8; offset++) {

// jump to middle of next bit

delayMicroseconds(bitDelay);

// read bit

val |= digitalRead(_receivePin) << offset;

}

delayMicroseconds(_bitPeriod);

return val;

}

return -1;

{

if (_baudRate == 0)

return;

int bitDelay = _bitPeriod - clockCyclesToMicroseconds(50); // a digitalWrite is about 50 cycles

byte mask;

digitalWrite(_transmitPin, LOW);

delayMicroseconds(bitDelay);

for (mask = 0x01; mask; mask <<= 1) {

if (b & mask){ // choose bit

digitalWrite(_transmitPin,HIGH); // send 1

}

else{

digitalWrite(_transmitPin,LOW); // send 1

}

delayMicroseconds(bitDelay);

}

digitalWrite(_transmitPin, HIGH);

delayMicroseconds(bitDelay);

{

while (*s)

print(*s++);

{

if (n < 0) {

print('-');

n = -n;

}

printNumber(n, 10);

{

if (base == 0)

print((char) n);

else if (base == 10)

print(n);

else

printNumber(n, base);

{

print('\r');

print('\n');

{

print(c);

println();

{

print(c);

println();

{

print(b);

println();

{

print(n);

println();

{

print(n);

println();

{

print(n);

println();

{

print(n, base);

println();

{

unsigned char buf[8 * sizeof(long)]; // Assumes 8-bit chars.

unsigned long i = 0;

if (n == 0) {

print('0');

return;

}

while (n > 0) {

buf[i++] = n % base;

n /= base;

}

for (; i > 0; i--)

print((char) (buf[i - 1] < 10 ? '0' + buf[i - 1] : 'A' + buf[i - 1] - 10));