marcoaita/malibrary/seven-segment-display

Driver for 7-segment display. It supports numbers 0-9999, decimal point position and negative sign.

seven-segment-display

@/seven-segment-display

Driver for 7-segment display. It supports numbers 0-9999, decimal point position and negative sign.

LATport

latch port (def. D4)

CLKport

clock port (def.D7)

DATAport

data port (def. D8)

VALnumber

Number to display 0 to 9999

DOTnumber

Position of decimal dot, from right. Zero means no dot, 1 after frist digit..

NEGboolean

Is a negative sign required?

ERRpulse

Input number out of range

To use the node in your project you should have the marcoaita/malibrary library installed. Use the “File → Add Library” menu item in XOD IDE if you don’t have it yet. See Using libraries for more info.

struct State {
};

{{ GENERATED_CODE }}
// Segment byte maps for numbers 0 to 9
// const byte SEGMENT_MAP[] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0X80,0X90};
//Segment byte maps for numbers 0 to 9 PLUS number with decimal dot, plus negative sign at end
const byte SEGMENT_MAP[] = {0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0X80,0X90,0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10,0xBF};
/* Byte maps to select digit 1 to 4 */
const byte SEGMENT_SELECT[] = {0xF1,0xF2,0xF4,0xF8};
// int LATCH_DIO=4;  // These are for the 7-segment on the ks0183 multifuncion shield
// int CLK_DIO=7;
// int DATA_DIO=8;
int LATCH_DIO;  // 7-segment pins
int CLK_DIO;
int DATA_DIO;
int Value;
int dot_pos;
bool neg_sign;

void wnts(int Segment, int Value) {
    digitalWrite(LATCH_DIO,LOW);
    shiftOut(DATA_DIO, CLK_DIO, MSBFIRST, SEGMENT_MAP[Value]);
    shiftOut(DATA_DIO, CLK_DIO, MSBFIRST, SEGMENT_SELECT[Segment] );
    digitalWrite(LATCH_DIO,HIGH);
    }

void evaluate(Context ctx) {
        /* Define shift register pins used for seven segment display */
        LATCH_DIO = getValue<input_LAT>(ctx);
        CLK_DIO = getValue<input_CLK>(ctx);
        DATA_DIO = getValue<input_DATA>(ctx);

    
        /* Set DIO pins to outputs */
        pinMode(LATCH_DIO,OUTPUT);
        pinMode(CLK_DIO,OUTPUT);
        pinMode(DATA_DIO,OUTPUT);

        // read value to display
        Value = int(getValue<input_VAL>(ctx));  // cast to int, because XOD doesn't allow me an easy conversion to int
        dot_pos = int(getValue<input_DOT>(ctx)); //position of decimal dot
        neg_sign = getValue<input_NEG>(ctx);//do we need a negative sign to the left ?
    
        if (Value > 9999) {
            emitValue<output_ERR>(ctx, 1);
            return;
        }
    
        if (isTimedOut(ctx)) {
//        while(true){
        Value = int(getValue<input_VAL>(ctx));
        dot_pos = int(getValue<input_DOT>(ctx)); //position of decimal dot
        neg_sign = getValue<input_NEG>(ctx); ; //do we need a negative sign to the left ?
        if (Value > 9999) {
            emitValue<output_ERR>(ctx, 1);
            return;
        }
        wnts( 0 , neg_sign ? 20: (int((Value / 1000) % 10)+(dot_pos== 3 ? 10 : 0)));
        wnts( 1 , int((Value / 100) % 10)+ (dot_pos== 2 ? 10 : 0));
        wnts( 2 , int((Value / 10) % 10)+(dot_pos== 1 ? 10 : 0));
        wnts( 3 , int((Value) % 10));
//         wnts( 0 , int((Value / 1000) % 10));
//         wnts( 1 , int((Value / 100) % 10));
//         wnts( 2 , int((Value / 10) % 10)+ (dot_pos==1 ? 10 : 0 ));
//         wnts( 3 , int((Value) % 10));
            //        }
        // Schedule immediate re-evaluation 
        setTimeout(ctx, 0);
    }
        setTimeout(ctx, 0);
}

seven-segment-display

marcoaita/malibrary/seven-segment-display

C++ implementation