Help me to reduce sketch size, for uploading on atmega8 (with bootloader).
I have read lot of posts on this forum, and changed all like : font, variables, port manipulating. But code still big. Maybe someone can add something especially for MY code. Thanks.
/*
arduino数字示波器
作者:�ntwhq@tom.com
2013 08
*/
#include <U8glib.h> //声明库
U8GLIB_PCD8544 u8g(7, 5, 6);
const int Input = A0; //声明输入引脚
const int Key_add = 8; //声明按钮引脚
const int Key_sub = 9;
const int Key_hold = 10;
int x, y; //声明坐标
int i, i1, i2, V_min, V_max, V_mid, t, sta, Key = 1, hold = 0;
long Freq;
float Vpp;
int Y[96]; //声明信号值储存数组
int Buffer[192];
void setup( )
{
pinMode(Key_add, INPUT);
digitalWrite(Key_add, HIGH);
pinMode(Key_sub, INPUT);
digitalWrite(Key_sub, HIGH);
pinMode(Key_hold, INPUT);
digitalWrite(Key_hold, HIGH);
ADMUX = 0x60;
ADCSRA = 0xe2;
u8g.setFont(u8g_font_micro);
}
void loop( )
{
sample( );
Measure( );
Transform( );
Key_scan( );
if (hold == 0)
{
u8g.firstPage( );
do
{
draw( );
}
while ( u8g.nextPage( ));
}
}
void sample( )
{ for (i = 0; i < 192; i++)
{
Buffer[i] = ADCH;
switch (Key)
{
case 1:
break;
case 2:
delayMicroseconds(4);
break;
case 3:
delayMicroseconds(10);
break;
case 4:
delayMicroseconds(23);
break;
case 5:
delayMicroseconds(60);
break;
case 6:
delayMicroseconds(123);
break;
case 7:
delayMicroseconds(248);
break;
case 8:
delayMicroseconds(623);
break;
case 9:
delayMicroseconds(1247);
break;
default: break;
}
}
}
void Measure()
{
V_max = Buffer[0];
V_min = Buffer[0];
for (i = 0; i < 192; i++)
{
if (Buffer[i] > V_max)
V_max = Buffer[i];
if (Buffer[i] < V_min)
V_min = Buffer[i];
}
V_mid = (V_max + V_min) / 2;
Vpp = (V_max - V_min) * 50.0 / 255;
for (i = 0; i < 97; i++)
{
if (Buffer[i] < V_mid && Buffer[i + 1] >= V_mid)
{
i1 = i;
break;
}
}
for (i = i1 + 1; i < 98 + i1; i++)
{
if (Buffer[i] < V_mid && Buffer[i + 1] >= V_mid)
{
i2 = i;
break;
}
}
t = i2 - i1;
if (t > 0)
Freq = 8000 / t;
else
Freq = 0;
}
void Transform( )
{
for (sta = 0; sta < 96; sta++)
{
if (Buffer[sta] < 128 && Buffer[sta + 2] > 128)
break;
}
for (i = 0; i < 96; i++)
Y[i] = 63 - (Buffer[i + sta] >> 2);
}
void draw( )
{
for (x = 0; x < 60; x++)
u8g.drawLine(x, Y[x], x, Y[x + 1]); //画线
//画边框
// u8g.drawFrame(0, 0, 60, 48);
// 画坐标轴
u8g.drawLine(30, 0, 30, 48);
u8g.drawLine(0, 24, 60, 24);
for (x = 0; x < 60; x += 6)
u8g.drawLine(x, 23, x, 25);
for (y = 0; y < 48; y += 6)
u8g.drawLine(29, y, 31, y);
//画网格
for (x = 6; x < 60; x += 6)
{
for (y = 6; y < 48; y += 6)
u8g.drawPixel(x, y);
}
//显示参数
u8g.drawStr(62, 6, "MS");
// u8g.drawStr(62, 18, "V");
// u8g.drawStr(62, 24, "0.324");
u8g.drawStr(62, 30, "Vpp");
u8g.setPrintPos( 62, 36);
u8g.print(Vpp);
u8g.drawStr(78, 36, "V");
u8g.drawStr(62, 42, "F(HZ)");
switch (Key)
{
case 1:
u8g.drawStr(62, 12, "0.02");
u8g.setPrintPos( 62, 48);
u8g.print(Freq * 50);
break;
case 2:
u8g.drawStr(62, 12, "0.05");
u8g.setPrintPos( 62, 48);
u8g.print(Freq * 20);
break;
case 3:
u8g.drawStr(62, 12, " 0.1");
u8g.setPrintPos( 62, 48);
u8g.print(Freq * 10);
break;
case 4:
u8g.drawStr(62, 12, " 0.2");
u8g.setPrintPos( 62, 48);
u8g.print(Freq * 5);
break;
case 5:
u8g.drawStr(62, 12, " 0.5");
u8g.setPrintPos( 62, 48);
u8g.print(Freq * 2);
break;
case 6:
u8g.drawStr(62, 12, " 1");
u8g.setPrintPos( 62, 48);
u8g.print(Freq);
break;
case 7:
u8g.drawStr(62, 12, " 2");
u8g.setPrintPos( 62, 48);
u8g.print(Freq / 2);
break;
case 8:
u8g.drawStr(62, 12, " 5");
u8g.setPrintPos( 62, 48);
u8g.print(Freq / 5);
break;
case 9:
u8g.drawStr(62, 12, " 10");
u8g.setPrintPos( 62, 48);
u8g.print(Freq / 10);
break;
default: break;
}
}
//键盘扫描
void Key_scan()
{
if (digitalRead(Key_add) == LOW)
{
while (digitalRead(Key_add) == LOW);
Key++;
if (Key == 10)
Key = 9;
delay(10);
}
if (digitalRead(Key_sub) == LOW)
{
while (digitalRead(Key_sub) == LOW);
Key--;
if (Key == 0)
Key = 1;
delay(10);
}
if (digitalRead(Key_hold) == LOW)
{
while (digitalRead(Key_hold) == LOW);
hold = ~hold;
delay(10);
}
}
