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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
* --------------------
* 200-213 - set digital pin 0-13 to output
* 214-227 - set digital pin 0-13 to input
* 230 - next byte sets PWM0 value
* 231 - next byte sets PWM1 value
* 232 - next byte sets PWM2 value
*
*
* 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.
*/
#define TOTAL_DIGITAL_PINS 14
byte i;
// this flag says that the next serial input will be data, not control
boolean waitForData = 0;
/* this int serves as an array of bits to store pin status
* 0 = INPUT, 1 = OUTPUT
*/
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 = OUTPUT << digitalPin;
// only read the pin if its set to input
if(digitalPinStatus & digitalPinBit) {
digitalData = 0; // pin set to OUTPUT, don't read
}
else {
digitalData = digitalRead(digitalPin);
}
digitalOutputByte = digitalOutputByte + (2^(i+1-startPin)*digitalData);
}
printByte(digitalOutputByte);
}
// -------------------------------------------------------------------------
void setPinMode(int pin, int mode) {
pinMode(pin,mode);
if(mode == INPUT) {
digitalPinStatus = digitalPinStatus &~ (1 << pin);
}
if(mode == OUTPUT) {
digitalPinStatus = digitalPinStatus | (1 << pin);
}
}
// -------------------------------------------------------------------------
void checkForInput() {
if(serialAvailable()) {
while(serialAvailable()) {
processInput(serialRead());
}
}
}
// -------------------------------------------------------------------------
void processInput(int inputData) {
if (waitForData > 0) {
// the PWM commands (230-232) have a byte of data following the command
analogWrite(waitForData,inputData);
waitForData = 0;
}
else {
switch (inputData) {
case 200:
case 201:
case 202:
case 203:
case 204:
case 205:
case 206:
case 207:
case 208:
case 209:
case 210:
case 211:
case 212:
case 213:
setPinMode(inputData-200,OUTPUT);
printByte(inputData);
printByte(inputData);
printByte(inputData);
printByte(inputData);
break;
case 214:
case 215:
case 216:
case 217:
case 218:
case 219:
case 220:
case 221:
case 222:
case 223:
case 224:
case 225:
case 226:
case 227:
setPinMode(inputData-214,INPUT);
printByte(inputData);
printByte(inputData);
printByte(inputData);
printByte(inputData);
break;
case 230:
case 231:
case 232:
// set waitForData to the PWM pin number
waitForData = inputData - 221;
printByte(inputData);
printByte(inputData);
printByte(inputData);
printByte(inputData);
break;
case 255:
break;
}
}
}
// =========================================================================
// -------------------------------------------------------------------------
void setup() {
beginSerial(9600);
for(i=0; i<TOTAL_DIGITAL_PINS; ++i) {
setPinMode(i,INPUT);
}
}
// -------------------------------------------------------------------------
void loop() {
// read all digital pins
outputDigital(0);
outputDigital(7);
/*
* get analog in
*/
/*
for(analogPin=0; analogPin<5; ++analogPin)
{
analogData = analogRead(analogPin);
// these two bytes get converted back into the whole number in Pd
printByte(analogData >> 7); // bitshift the big stuff into the output byte
printByte(analogData % 128); // mod by 32 for the small byte
}
*/
// ++analogPin;
// if (analogPin > 5) analogPin = 0;
/* end with the cycle marker */
// bitshift the big stuff into the output byte
printByte(digitalPinStatus >> 7);
// clear the 8th bit before truncating to a byte for small byte
printByte(digitalPinStatus % 128);
checkForInput();
printByte(255);
}
|
