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| #include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
byte const columns = 20, rows = 4;
byte arreglo[columns];
volatile int randomizer;
// LCD不同强度指示符号
byte clearChar[8]= {0b00000,0b00000,0b00000,0b00000,0b00000,0b00000,0b00000,0b00000};
byte Char0[8] = {0b00000,0b00000,0b00000,0b00000,0b00000,0b00000,0b00000,0b11111};
byte Char1[8] = {0b00000,0b00000,0b00000,0b00000,0b00000,0b00000,0b11111,0b11111};
byte Char2[8] = {0b00000,0b00000,0b00000,0b00000,0b00000,0b11111,0b11111,0b11111};
byte Char3[8] = {0b00000,0b00000,0b00000,0b00000,0b11111,0b11111,0b11111,0b11111};
byte Char4[8] = {0b00000,0b00000,0b00000,0b11111,0b11111,0b11111,0b11111,0b11111};
byte Char5[8] = {0b00000,0b00000,0b11111,0b11111,0b11111,0b11111,0b11111,0b11111};
byte Char6[8] = {0b00000,0b11111,0b11111,0b11111,0b11111,0b11111,0b11111,0b11111};
byte Char7[8] = {0b11111,0b11111,0b11111,0b11111,0b11111,0b11111,0b11111,0b11111};
void setup()
{
lcd.begin(columns, rows);
Serial.begin(9600);
// 将音量强度符号加载到LCD
lcd.createChar(0, Char0);
lcd.createChar(1, Char1);
lcd.createChar(2, Char2);
lcd.createChar(3, Char3);
lcd.createChar(4, Char4);
lcd.createChar(5, Char5);
lcd.createChar(6, Char6);
lcd.createChar(7, Char7);
lcd.createChar(8, clearChar);
}
void loop()
{
#if 0
randomizer = generador();
arreglo[0] = randomizer;
printing();
// 从右往左显示
for (int i=(sizeof(arreglo) - 1); i>0; i--)
{
arreglo[i] = arreglo[i-1];
}
#endif
// 批量采样音量强度值
for(int i = 0;i < 20;i++)
{
arreglo[i] = generador();
}
// 显示音量强度
printing();
}
void printing()
{
for (int i=0; i < 20; i++)
{
vumetro(arreglo[i],i);
}
}
// 采样信号强度值，并映射到0-15
int generador()
{
int entrada = map(analogRead(A0),0,700,0,15);
return entrada;
}
// 将声道强度转换成LCD映射的符号
int vumetro(int character, int col)
{
switch(character)
{
case 0:
lcd.setCursor(col,0);
lcd.write(8);
lcd.setCursor(col,1);
lcd.write((byte)0);
break;
case 1:
lcd.setCursor(col,0);
lcd.write(8);
lcd.setCursor(col,1);
lcd.write(1);
break;
case 2:
lcd.setCursor(col,0);
lcd.write(8);
lcd.setCursor(col,1);
lcd.write(2);
break;
case 3:
lcd.setCursor(col,0);
lcd.write(8);
lcd.setCursor(col,1);
lcd.write(3);
break;
case 4:
lcd.setCursor(col,0);
lcd.write(8);
lcd.setCursor(col,1);
lcd.write(4);
break;
case 5:
lcd.setCursor(col,0);
lcd.write(8);
lcd.setCursor(col,1);
lcd.write(5);
break;
case 6:
lcd.setCursor(col,0);
lcd.write(8);
lcd.setCursor(col,1);
lcd.write(6);
break;
case 7:
lcd.setCursor(col,0);
lcd.write(8);
lcd.setCursor(col,1);
lcd.write(7);
break;
case 8:
lcd.setCursor(col,0);
lcd.write((byte)0);
lcd.setCursor(col,1);
lcd.write(7);
break;
case 9:
lcd.setCursor(col,0);
lcd.write(1);
lcd.setCursor(col,1);
lcd.write(7);
break;
case 10:
lcd.setCursor(col,0);
lcd.write(2);
lcd.setCursor(col,1);
lcd.write(7);
break;
case 11:
lcd.setCursor(col,0);
lcd.write(3);
lcd.setCursor(col,1);
lcd.write(7);
break;
case 12:
lcd.setCursor(col,0);
lcd.write(4);
lcd.setCursor(col,1);
lcd.write(7);
break;
case 13:
lcd.setCursor(col,0);
lcd.write(5);
lcd.setCursor(col,1);
lcd.write(7);
break;
case 14:
lcd.setCursor(col,0);
lcd.write(6);
lcd.setCursor(col,1);
lcd.write(7);
break;
case 15:
lcd.setCursor(col,0);
lcd.write(7);
lcd.setCursor(col,1);
lcd.write(7);
break;
default:
lcd.setCursor(col,0);
lcd.write(8);
lcd.setCursor(col,1);
lcd.write((byte)1);
break;
}
lcd.setCursor(col,3);
lcd.print(character, HEX);
}
|
