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-rw-r--r--Pd_firmware/Pd_firmware.pde335
1 files changed, 224 insertions, 111 deletions
diff --git a/Pd_firmware/Pd_firmware.pde b/Pd_firmware/Pd_firmware.pde
index 7e0becd..6e18df8 100644
--- a/Pd_firmware/Pd_firmware.pde
+++ b/Pd_firmware/Pd_firmware.pde
@@ -1,111 +1,224 @@
-/* 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);
-}
+/* 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);
+}
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