ciao a tutti..sto sperimentando l'uso dello shifout e mi ritrovo che con il codice seguente tutto funziona
//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;
const int pulsante=10;
int pulsantecont=0;
int memoria=1;
int buttonstate=0;
int lastButtonState = LOW;
//holders for infromation you're going to pass to shifting function
byte dataRED;
byte dataArrayRED[10];
void setup() {
//set pins to output because they are addressed in the main loop
pinMode(latchPin, OUTPUT);
pinMode (pulsante,INPUT);
Serial.begin(9600);
//Arduino doesn't seem to have a way to write binary straight into the code
//so these values are in HEX. Decimal would have been fine, too.
dataArrayRED[0] = 0xFE; //11111111
dataArrayRED[1] = 0xFC; //11111110
dataArrayRED[2] = 0xF8; //11111100
dataArrayRED[3] = 0xF0; //11111000
dataArrayRED[4] = 0xE0; //11110000
dataArrayRED[5] = 0xC0; //11100000
dataArrayRED[6] = 0x80; //11000000
dataArrayRED[7] = 0xFF; //10000000
dataArrayRED[8] = 0x00; //00000000
dataArrayRED[9] = 0x40; //11100000
}
void loop() {
buttonstate = digitalRead(pulsante);
delay(20); // debounce
if (buttonstate != lastButtonState) {
if (buttonstate == HIGH && memoria==1) {
pulsantecont++ ;
if (pulsantecont >9) pulsantecont =0 ;
dataRED = dataArrayRED[pulsantecont];
Serial.println(dataRED,DEC);
//ground latchPin and hold low for as long as you are transmitting
digitalWrite(latchPin, 0);
//move 'em out
shiftOut(dataPin, clockPin, dataRED);
//return the latch pin high to signal chip that it
//no longer needs to listen for information
digitalWrite(latchPin, 1);
delay(300);
}}}
// the heart of the program
void shiftOut(int myDataPin, int myClockPin, byte myDataOut) {
// This shifts 8 bits out MSB first,
//on the rising edge of the clock,
//clock idles low
//internal function setup
int i=0;
int pinState;
pinMode(myClockPin, OUTPUT);
pinMode(myDataPin, OUTPUT);
//clear everything out just in case to
//prepare shift register for bit shifting
digitalWrite(myDataPin, 0);
digitalWrite(myClockPin, 0);
//for each bit in the byte myDataOut?
//NOTICE THAT WE ARE COUNTING DOWN in our for loop
//This means that %00000001 or "1" will go through such
//that it will be pin Q0 that lights.
for (i=7; i>=0; i--) {
digitalWrite(myClockPin, 0);
//if the value passed to myDataOut and a bitmask result
// true then... so if we are at i=6 and our value is
// %11010100 it would the code compares it to %01000000
// and proceeds to set pinState to 1.
if ( myDataOut & (1<<i) ) {
pinState= 1;
}
else {
pinState= 0;
}
//Sets the pin to HIGH or LOW depending on pinState
digitalWrite(myDataPin, pinState);
//register shifts bits on upstroke of clock pin
digitalWrite(myClockPin, 1);
//zero the data pin after shift to prevent bleed through
digitalWrite(myDataPin, 0);
}
//stop shifting
digitalWrite(myClockPin, 0);
}
ma se nel codice aggiungo un altro pulsante con il seguente codice non succede + nulla
//Pin connected to ST_CP of 74HC595
int latchPin = 8;
//Pin connected to SH_CP of 74HC595
int clockPin = 6;
////Pin connected to DS of 74HC595
int dataPin = 7;
const int pulsante=10;
const int pulsante1=9;
int pulsantecont=0;
int memoria=1;
int buttonstate=0;
int buttonstate1=0;
int lastButtonState = LOW;
int lastButtonState1 = LOW;
//holders for infromation you're going to pass to shifting function
byte dataRED;
byte dataArrayRED[10];
void setup() {
//set pins to output because they are addressed in the main loop
pinMode(latchPin, OUTPUT);
pinMode (pulsante,INPUT);
Serial.begin(9600);
//Arduino doesn't seem to have a way to write binary straight into the code
//so these values are in HEX. Decimal would have been fine, too.
dataArrayRED[0] = 0xFE; //11111111
dataArrayRED[1] = 0xFC; //11111110
dataArrayRED[2] = 0xF8; //11111100
dataArrayRED[3] = 0xF0; //11111000
dataArrayRED[4] = 0xE0; //11110000
dataArrayRED[5] = 0xC0; //11100000
dataArrayRED[6] = 0x80; //11000000
dataArrayRED[7] = 0xFF; //10000000
dataArrayRED[8] = 0x00; //00000000
dataArrayRED[9] = 0x40; //11100000
}
void loop() {
buttonstate = digitalRead(pulsante);
delay(20); // debounce
if (buttonstate != lastButtonState) {
if (buttonstate == HIGH && memoria==1) {
pulsantecont==2 ;
}
lastButtonState = buttonstate;
buttonstate1 = digitalRead(pulsante1);
delay(20); // debounce
if (buttonstate1 != lastButtonState1) {
if (buttonstate1 == HIGH && memoria==1) {
pulsantecont==8 ;
}
lastButtonState1 = buttonstate1;
dataRED = dataArrayRED[pulsantecont];
Serial.println(pulsantecont);
//ground latchPin and hold low for as long as you are transmitting
digitalWrite(latchPin, 0);
//move 'em out
shiftOut(dataPin, clockPin, dataRED);
//return the latch pin high to signal chip that it
//no longer needs to listen for information
digitalWrite(latchPin, 1);
delay(300);
}}}
// the heart of the program
void shiftOut(int myDataPin, int myClockPin, byte myDataOut) {
// This shifts 8 bits out MSB first,
//on the rising edge of the clock,
//clock idles low
//internal function setup
int i=0;
int pinState;
pinMode(myClockPin, OUTPUT);
pinMode(myDataPin, OUTPUT);
//clear everything out just in case to
//prepare shift register for bit shifting
digitalWrite(myDataPin, 0);
digitalWrite(myClockPin, 0);
//for each bit in the byte myDataOut�
//NOTICE THAT WE ARE COUNTING DOWN in our for loop
//This means that %00000001 or "1" will go through such
//that it will be pin Q0 that lights.
for (i=7; i>=0; i--) {
digitalWrite(myClockPin, 0);
//if the value passed to myDataOut and a bitmask result
// true then... so if we are at i=6 and our value is
// %11010100 it would the code compares it to %01000000
// and proceeds to set pinState to 1.
if ( myDataOut & (1<<i) ) {
pinState= 1;
}
else {
pinState= 0;
}
//Sets the pin to HIGH or LOW depending on pinState
digitalWrite(myDataPin, pinState);
//register shifts bits on upstroke of clock pin
digitalWrite(myClockPin, 1);
//zero the data pin after shift to prevent bleed through
digitalWrite(myDataPin, 0);
}
//stop shifting
digitalWrite(myClockPin, 0);
}
La variabile memoria al momento è superflua ma mi servirà successivamente..qualcuno ha idea di come posso risolvere?alla fine di tutto devo avere 10 pulsanti che richiamino il rispettivo numero nel dataarrayred...