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/* Pd_firmware
* ------------------
*
*
* It was designed to work with the Pd patch of the same
* name in: Help -> Browser -> examples -> hardware
*
* (cleft) 2006 Hans-Christoph Steiner
* @author: Hans-Christoph Steiner
* @date: 2006-03-10
* @location: Polytechnic University, Brooklyn, New York, USA
*/
/*
* Pduino protocol
* ===============
* data: 0-127 control: 128-255
*
* Pd->Arduino commands
* --------------------
* 150 - next byte sets PWM0 value
* 151 - next byte sets PWM1 value
* 152 - next byte sets PWM2 value
* 200-213 - set digital pin 0-13 to input
* 220-233 - set digital pin 0-13 to output
*
*
* Pd->Arduino byte cycle
* ----------------------
* 0 cycle marker (255/11111111)
* 1 digitalOut 0-6 bitmask
* 2 digitalOut 7-13 bitmask
*
* Arduino->Pd byte cycle
* ----------------------
* 0 digitalIn 0-6 bitmask
* 1 digitalIn 7-13 bitmask
* 2 analogIn0 byte0
* 3 analogIn0 byte1
* 4 analogIn1 byte0
* 5 analogIn1 byte1
* 6 analogIn2 byte0
* 7 analogIn2 byte1
* 8 analogIn3 byte0
* 9 analogIn3 byte1
* 10 analogIn4 byte0
* 11 analogIn4 byte1
* 12 analogIn5 byte0
* 13 analogIn5 byte1
* 14 cycle marker (255/11111111)
*
*
* TX RX
* -----------------------
*
*/
/*
* CAUTION!! Be careful with the Serial Monitor, it could freeze
* your computer with this firmware running! It outputs data
* without a delay() so its very fast.
*/
byte i;
// this int serves as an array of bits to store pin status
int digitalPinStatus;
byte analogPin;
int analogData;
void outputDigital(byte startPin) {
byte digitalPin;
byte digitalPinBit;
byte digitalOutputByte;
byte digitalData;
for(i=0;i<7;++i)
{
digitalPin = i+startPin;
digitalPinBit = 2^digitalPin;
// only read the pin if its set to input
if(digitalPinStatus & digitalPinBit)
digitalData = digitalRead(digitalPin);
else
digitalData = 0;
digitalOutputByte = digitalOutputByte + (2^(i+1-startPin)*digitalData);
}
printByte(digitalOutputByte);
}
void setup() {
beginSerial(9600);
}
void loop() {
// read all digital pins
outputDigital(0);
outputDigital(7);
/*
* get analog in
*/
analogData = analogRead(analogPin);
// these two bytes get converted back into the whole number in Pd
printByte(analogData / 32); // div by 32 for the big byte
printByte(analogData % 32); // mod by 32 for the small byte
++analogPin;
if (analogPin > 5) analogPin = 0;
/* end with the cycle marker */
printByte(255);
}
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