Diff: main.cpp

Revision:

0:e01529ec0e2d

Child:

1:4c16fd7f2821

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Nov 23 21:14:51 2010 +0000
@@ -0,0 +1,112 @@
+//
+//  DB_LCD20x4 Program
+//          Nov 7th,2010  Started
+//          Buldom  EN COURS
+//
+
+#include "mbed.h"
+#include "TextLCD.h"
+
+
+#define PERIOD 0.1              // refresh period of measurement
+
+DigitalOut myled1(LED1);        // Assign LED output port LED1 to LED4
+DigitalOut myled2(LED2);
+DigitalOut myled3(LED3);
+DigitalOut myled4(LED4);
+InterruptIn button(p25);
+
+Timer timer;
+long var;
+long count;
+long hertz;
+int pos = 0;
+int array[100];
+
+//enum LCDType {
+//         LCD16x2     /**< 16x2 LCD panel (default) */
+//         , LCD16x2B  /**< 16x2 LCD panel alternate addressing */
+//         , LCD20x2   /**< 20x2 LCD panel */
+//         , LCD20x4   /**< 20x4 LCD panel */
+//         };
+// a compilation error occurs when declaring LCDType = LCD20x4 (Identifier "LCD20x4" is undefined (E20))
+// consequently, TextLCD.h has been modified with default LCDType = LCD20x4
+// and LCDType is not declared in TextLCD function below;
+
+TextLCD lcd(p24, p26, p27, p28, p29, p30, TextLCD::LCD20x4); // rs,e,d0,d1,d2,d3,20 char's x 4 lines
+
+
+void flip() {
+    myled4 = !myled4;
+    array[pos] = timer.read_us();
+    timer.reset();
+    timer.start();
+    pos++;
+    if (pos == 100) {
+        pos = 0;
+    }
+}
+
+int main() {
+    float tim;
+    pos = 0;
+    int i;
+    for (i=0; i<100; i++) {
+        array[i] = 0;
+    }
+
+    set_time(1290443600); // 22 Nov 2010 a 16H33
+
+    lcd.cls();
+    lcd.locate(0, 0);
+    //          0        1         2
+    lcd.printf(" LCD Frequencemeter ");
+    lcd.locate(0, 1);
+    lcd.printf("LCD 20x4 test progrm");
+    lcd.locate(0, 2);
+    time_t seconds = time(NULL);
+    lcd.printf("%s", ctime(&seconds));
+    lcd.locate(0, 3);
+    lcd.printf("(c) Dominique Bultez");
+    wait(2);
+    lcd.cls();
+    lcd.locate(0, 0);
+    lcd.printf(" LCD Frequencemeter ");
+    lcd.locate(0, 3);
+    lcd.printf("(c) Dominique Bultez");
+
+    timer.reset();
+    button.rise(&flip); // attach the address of the flip function to the rising edge
+    var = 0;
+    tim = PERIOD;
+
+    while (1) {
+        for (i=0; i<100; i++) {
+            var = var + array[i];
+        }
+        count = var / 100;          // moyenne de 100 &#65533;chantillons
+        hertz = 1000000/count;
+        var = 0;
+        myled1 = 1;
+        wait(tim);
+        myled1 = 0;
+        myled2 = 1;
+        wait(tim);
+        myled2 = 0;
+        myled3 = 1;
+        wait(tim);
+        myled3 = 0;
+
+        //lcd.cls();
+        //lcd.locate(0, 0);   // 1st line top
+        //          0        1         2
+        //          12345678901234567890
+        //lcd.printf(" LCD Frequencemeter ");
+        lcd.locate(0, 1);   // 2nd line
+        lcd.printf("%d uSec   ", count);
+        lcd.locate(0, 2);
+        lcd.printf("%d Hz     ", hertz);
+        //lcd.locate(0, 3);
+        //lcd.printf("(c) Dominique Bultez");
+    }
+}
\ No newline at end of file