Спойлер
Код: Выделить всё
/*
Demo Code for HDSP 2111 using SN74LS595N
Matt Joyce < matt@nycresistor.com >
Mark Tabry
*/
//Pin connected to latch pin (ST_CP) of 74HC595
const int latchPin = 8;
//Pin connected to clock pin (SH_CP) of 74HC595
const int clockPin = 12;
////Pin connected to Data in (DS) of 74HC595
const int dataPin = 11;
const int ce = 5;
const int wr = 6;
const int a2 = 4;
const int a1 = 3;
const int a0 = 2;
const int rst = 10;
const int a3 = 9;
int incomingByte = 0;
void setup() {
//set pins to output because they are addressed in the main loop
pinMode(latchPin, OUTPUT);
pinMode(dataPin, OUTPUT);
pinMode(clockPin, OUTPUT);
pinMode(a0, OUTPUT);
pinMode(a1, OUTPUT);
pinMode(a2, OUTPUT);
pinMode(a3, OUTPUT);
pinMode(rst, OUTPUT);
pinMode(ce, OUTPUT);
pinMode(wr, OUTPUT);
digitalWrite(ce, HIGH);
digitalWrite(wr, HIGH);
resetDisplay();
}
void resetDisplay() {
digitalWrite(rst, LOW);
delayMicroseconds(1);
digitalWrite(rst,HIGH);
delayMicroseconds(150);
digitalWrite(a3, HIGH);
}
void writeDisplay(char *input) {
// Serial.println(input);
for (int i=0; i<8; i++) {
digitalWrite(a0, (1&i)!=0?HIGH:LOW);
digitalWrite(a1, (2&i)!=0?HIGH:LOW);
digitalWrite(a2, (4&i)!=0?HIGH:LOW);
digitalWrite(latchPin, LOW);
shiftOut(dataPin, clockPin, MSBFIRST, input[i] );
digitalWrite(latchPin, HIGH);
delay(1);
digitalWrite(ce, LOW);
delay(1);
digitalWrite(wr, LOW);
delay(1);
digitalWrite(wr, HIGH);
delay(1);
digitalWrite(ce, HIGH);
delay(1);
}
}
void scrollDisplay(char *words) {
char buffer[9];
int i = 0;
while(words[i] != 0){
boolean blank = false;
for (int j = 0; j<8; j++) {
if ( !blank && words[i+j] == 0 ) {
blank = true;
}
if ( blank ) {
buffer[j] = ' ';
}
else {
buffer[j] = words[i+j];
}
}
buffer[8]=0;
writeDisplay(buffer);
delay(200);
i++;
}
}
void loop() {
char intro[] = " Test ";
scrollDisplay(intro);
delay(2000);
}
