Diff: main.cpp

Revision:

0:6ff38abfbe0b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Feb 18 04:48:24 2011 +0000
@@ -0,0 +1,86 @@
+#include "mbed.h"
+#include "TextLCD.h"
+// #include "math.h"
+
+TextLCD lcd(p24, p26, p27, p28, p29, p30);
+AnalogIn in(p20);
+AnalogOut out(p18);
+Ticker input;
+Ticker output;
+int freq;
+double t = 0.0 ;
+float d11 = 0.0, d12 =0.0 ;
+
+void run(){
+    float data ;
+    
+    data = in;
+    lcd.locate(3,0);
+    
+    if ( data < 0.1212){
+        freq = 0;
+        lcd.putc(0xFE);
+        lcd.putc(0xFE);
+    }else if ( data < 0.181){
+        freq = 2093;
+        lcd.putc(0xC4);
+        lcd.putc(0xDE);      
+    }else if ( data < 0.242){
+        freq = 1976;
+        lcd.putc(0xBC);
+        lcd.putc(0xFE);  
+    }else if ( data < 0.333){
+        freq = 1760;
+        lcd.putc(0xD7);
+        lcd.putc(0xFE);  
+    }else if ( data < 0.394){
+        freq = 1568;
+        lcd.putc(0xBF);
+        lcd.putc(0xFE); 
+    }else if ( data < 0.485){  
+        freq = 1397;
+        lcd.putc(0xCC);
+        lcd.putc(0xA7);                   
+    }else if ( data < 0.697 ){
+        freq = 1319;
+        lcd.putc(0xD0);
+        lcd.putc(0xFE);  
+    }else if ( data < 0.85){    
+        freq = 1175;
+        lcd.putc(0xDA);
+        lcd.putc(0xFE);
+    }else{
+        freq = 1046;
+        lcd.putc(0xC4);
+        lcd.putc(0xDE);    
+    }
+        
+    if ( 0.12 <= data){
+        float range = 26.663 * pow((data*3.3),-1.25);
+        lcd.locate(0,1);
+        lcd.printf("RANGE %4.1f[cm]",range);
+    }else{
+        lcd.locate(0,1);
+        lcd.printf("RANGE OVER!     ");
+    }
+}
+
+void wave(){
+    float a;
+
+    if ( freq != 0 ){
+        a =0.5*sin(2.0 * 3.1415 * freq * t )+0.5;
+        out = a;
+    }
+    if ( t > 1.0 ) t = 0.0 ;
+    t=t+0.00005;
+}
+       
+int main() {    
+    input.attach(&run,0.5);   
+    output.attach_us(&wave,50);
+
+    while(1){
+   
+    }
+}