Then I write a bit of Arduino code:
//Very initial code borrowed from this example:
//**************************************************************//
// Name : shiftOutCode, Hello World //
// Author : Carlyn Maw,Tom Igoe //
// Date : 25 Oct, 2006 //
// Version : 1.0 //
// Notes : Code for using a 74HC595 Shift Register //
// : to count from 0 to 255 //
//****************************************************************
//Pin connected to ST_CP of 74HC595
int latchPin = 9;
//Pin connected to SH_CP of 74HC595
int clockPin = 8;
////Pin connected to DS of 74HC595
int dataPin = 11;
int enablePin = 10; //Active Low!
//int col[5] = {6,5,2,3,4};
int col[5] = {4,3,2,5,6};
byte row;
byte pattern[80];
byte frame[5] = {B00010000,
B00010000,
B00010000,
B00010000,
B00010000,
};
int i;
int cycles = 0;
int framenum = 0;
int totalframes = 100;
int newline;
int reading_flag = 0;
int readindex = 0;
unsigned long read_timeout;
unsigned long req_timeout = 0;
int nextcheck = 1000;
//——States——
int state = 0;
void setup() {
//set pins to output because they are addressed in the main loop
pinMode(latchPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(dataPin, OUTPUT);
pinMode(enablePin, OUTPUT);
for(i = 0; i pinMode(col[i], OUTPUT);
}
Serial.begin(9600);
}
void loop() {
for (int j = 0; j
//Set all the column registers high, except the columnwe want to show
for(i = 0; i digitalWrite(col[i], HIGH);
}
digitalWrite(col[j],LOW);
//ground latchPin and hold low for as long as you are transmitting
digitalWrite(latchPin, LOW);
//disable the outputs while we are shifting
digitalWrite(enablePin, HIGH);
shiftOut(dataPin, clockPin, MSBFIRST, frame[j]);
//return the latch pin high to signal chip that it
//no longer needs to listen for information
digitalWrite(latchPin, HIGH);
//enable the outputs
digitalWrite(enablePin, LOW);
delay(1);
//digitalWrite(col[j],HIGH);
}//done displaying frame
if (Serial.available() > 0) {
newline = Serial.read();
for (int j = 0; j frame[j] = frame[j] }
frame[0] = frame[0] | (newline & 1) == 1;
frame[1] = frame[1] | (newline & 2) == 2;
frame[2] = frame[2] | (newline & 4) == 4;
frame[3] = frame[3] | (newline & 8) == 8;
frame[4] = frame[4] | (newline & 16) == 16;
}
}
