arduinoで真理値表

概要

arduinoで真理値表やってみた。
シリアルから、打ち込んでRUNすると、キーパットを入力としてLCDに表示する。
簡単に言うと、論理回路エミュレータ。
in,out,wire,xor,and,orを実装。

写真

実行結果

サンプルコード

#include <LiquidCrystal.h>

#define btRIGHT             0
#define btUP                1
#define btDOWN              2
#define btLEFT              3
#define btSELECT            4
#define btNONE              5
#define err                 6
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
char buf[20];
char w[8];
char io[8];
char p0[8];
char p1[8];
char p2[8];
char p3[8];
int Ptr = 0;
int OP = 0;
char Val;
char RD(int ado)
{
    char v = buf[ado];
    return v;
}
void WR(int ado, char data)
{
    buf[ado] = data;
}
void putchr(char c)
{
    Serial.print(c);
}
boolean num()
{
    if (48 <= RD(Ptr) && RD(Ptr) <= 57) return true;
    else return false;
}
boolean getnm2()
{
    char ch;
    if (!num()) return false;
    int n = 0;
    do
    {
        n *= 10;
        ch = RD(Ptr++);
        n += ch - 48;
    } while (num());
    Val = n;
    return true;
}
int read(int adc_key_in)
{
    if (adc_key_in > 1000) return btNONE;
    if (adc_key_in < 50) return btRIGHT;
    if (adc_key_in < 250) return btUP;
    if (adc_key_in < 450) return btDOWN;
    if (adc_key_in < 650) return btLEFT;
    if (adc_key_in < 850) return btSELECT;
    return err;
}
void volt(int adc_key_in)
{
    lcd.setCursor(11, 1);
    lcd.print((float) adc_key_in * 5 / 1024);
}
void state(int lcd_key)
{
    lcd.setCursor(0, 1);
    switch (lcd_key)
    {
    case btRIGHT:
        Serial.println("RIGHT ");
    break;
    case btLEFT:
        Serial.println("LEFT  ");
        w[1] = 1;
    break;
    case btUP:
        Serial.println("UP    ");
    break;
    case btDOWN:
        Serial.println("DOWN  ");
    break;
    case btSELECT:
        Serial.println("SELECT");
        w[0] = 1;
    break;
    case btNONE:
    break;
    case err:
    break;
    }
}
void setup()
{
    Serial.begin(115200);
    Serial.println("echo");
    lcd.begin(16, 2);
    lcd.setCursor(0, 0);
}
void loop()
{
    int i;
    int lcd_key = 0;
    w[0] = 0;
    w[1] = 0;
    w[2] = 0;
    lcd_key = read(analogRead(0));
    state(lcd_key);
    while (Serial.available() > 0)
    {
        char ch = Serial.read();
        putchr(ch);
        if (ch == '\r')
        {
            WR(Ptr++, '\0');
            if (strncmp(buf, "list", 4) == 0)
            {
                Serial.println("ok");
                for (i = 0; i < OP; i++)
                {
                    Serial.print(p0[i], DEC);
                    Serial.print(" ");
                    Serial.print(p1[i], DEC);
                    Serial.print(" ");
                    Serial.print(p2[i], DEC);
                    Serial.print(" ");
                    Serial.println(p3[i], DEC);
                }
            }
            else if (strncmp(buf, "new", 3) == 0)
            {
                Serial.println("ok");
                OP = 0;
            }
            else if (strncmp(buf, "run", 3) == 0)
            {
                Serial.println("ok");
                while(1)
                {
                    for (i = 0; i < OP; i++)
                    {
                        if (p0[i] == 0) w[p3[i]] = w[p1[i]] ^ w[p2[i]];
                        if (p0[i] == 1) w[p3[i]] = w[p1[i]] & w[p2[i]];
                        if (p0[i] == 2) w[p3[i]] = w[p1[i]] | w[p2[i]];
                    }
                    for (i = 0; i < 8; i++)
                    {
                        if (io[i] == 0)
                        {
                            if (w[i] == 0)
                            {
                                lcd.setCursor(i, 0);
                                lcd.print("0");
                            }
                            else
                            {
                                lcd.setCursor(i, 0);
                                lcd.print("1");
                            }
                        }
                        if (io[i] == 2)
                        {
                            if (w[i] == 0)
                            {
                                lcd.setCursor(i, 1);
                                lcd.print("0");
                            }
                            else
                            {
                                lcd.setCursor(i, 1);
                                lcd.print("1");
                            }
                        }
                    }
                    w[0] = 0;
                    w[1] = 0;
                    w[2] = 0;
                    lcd_key = read(analogRead(0));
                    state(lcd_key);
                }
            }
            else if (strncmp(buf, "in ", 3) == 0)
            {
                Serial.println("ok");
                Ptr = 3;
                if (getnm2())
                {
                    io[Val] = 0;
                }
            }
            else if (strncmp(buf, "wire ", 5) == 0)
            {
                Serial.println("ok");
                Ptr = 5;
                if (getnm2())
                {
                    io[Val] = 1;
                }
            }
            else if (strncmp(buf, "out ", 4) == 0)
            {
                Serial.println("ok");
                Ptr = 4;
                if (getnm2())
                {
                    io[Val] = 2;
                }
            }
            else if (strncmp(buf, "xor ", 4) == 0)
            {
                Serial.println("ok");
                Ptr = 4;
                p0[OP] = 0;
                if (getnm2())
                {
                    p1[OP] = Val;
                    Ptr++;
                    if (getnm2())
                    {
                        p2[OP] = Val;
                        Ptr++;
                        if (getnm2())
                        {
                            p3[OP] = Val;
                        }
                    }
                }
                OP++;
            }
            else if (strncmp(buf, "and ", 4) == 0)
            {
                Serial.println("ok");
                Ptr = 4;
                p0[OP] = 1;
                if (getnm2())
                {
                    p1[OP] = Val;
                    Ptr++;
                    if (getnm2())
                    {
                        p2[OP] = Val;
                        Ptr++;
                        if (getnm2())
                        {
                            p3[OP] = Val;
                        }
                    }
                }
                OP++;
            }
            else if (strncmp(buf, "or ", 3) == 0)
            {
                Serial.println("ok");
                Ptr = 3;
                p0[OP] = 2;
                if (getnm2())
                {
                    p1[OP] = Val;
                    Ptr++;
                    if (getnm2())
                    {
                        p2[OP] = Val;
                        Ptr++;
                        if (getnm2())
                        {
                            p3[OP] = Val;
                        }
                    }
                }
                OP++;
            }
            else
            {
                Serial.println("err");
            }
            Ptr = 0;
        }
        else
        {
            WR(Ptr++, ch);
        }
    }
}

以上。