enable missing pins?

Projects Interfacing w/ Software on the Computer
1

hello : )

I have just set up a shift register circuit on a breadboard to control a 7 segment display. arduino pins : 8, 11 and 12 are in use only, and it works great. i use max msp to control the arduino, which sends 8 bit (0-255) numbers to the arduino which converts this to serial for the 595 shift registers.

The problem I am having, is that the sketch I am using appears to be created only to demonstrate the shift register concept, therefore all the other ins and outs on the arduino are not available.

i am wondering if it is possible to add code to the sketch (below), so that all the other pins can be used on the arduino ,as well as the 3 pins assigned for the shift registers via serial?

here is a link to the breadboard and arduino sketch

and here is a link to the max msp patch:

thanks for your help on this : )

here is the arduino sketch:

//Pin connected to ST_CP of 74HC595

int latchPin = 8;

//Pin connected to SH_CP of 74HC595

int clockPin = 12;

////Pin connected to DS of 74HC595

int dataPin = 11;

byte data1;

byte data2;

byte data3;

void setup() {

Serial.begin(57600);

pinMode(latchPin, OUTPUT);

}

void loop() {

if(Serial.available() > 2) {

data1 = Serial.read();

data2 = Serial.read();

data3 = Serial.read();

digitalWrite(latchPin, 0);

shiftOut(dataPin, clockPin, data1);

shiftOut(dataPin, clockPin, data2);

shiftOut(dataPin, clockPin, data3);

digitalWrite(latchPin, 1);

}

}

void shiftOut(int myDataPin, int myClockPin, byte myDataOut) {

int i=0;

int pinState;

pinMode(myClockPin, OUTPUT);

pinMode(myDataPin, OUTPUT);

digitalWrite(myDataPin, 0);

digitalWrite(myClockPin, 0);

for (i=7; i>=0; i--) {

digitalWrite(myClockPin, 0);

if ( myDataOut & (1<<i) ) {

pinState= 1;

}

else {

pinState= 0;

}

digitalWrite(myDataPin, pinState);

digitalWrite(myClockPin, 1);

digitalWrite(myDataPin, 0);

}

digitalWrite(myClockPin, 0);

}
2

Yes, of course you can.
Just set the correct pinMode in "setup", and away you go.

3

hey, thank you HAL. : )

I wasn't sure i was making sense.

do you know of any code anywhere that i could add to the above sketch?

I've used maxuino before which uses standard firmata.

can i just add the two together ? or just copy/paste the setup section :?

: /

4

do you know of any code anywhere that i could add to the above sketch?

There is code posted every single day on the forum that you could add to the sketch. Whether you want to, or not, is a different issue.

What is it that you want the sketch to do that it is not doing? THAT is the code that you need to add.

5

thank you for that Pauls.