Diff: main.cpp

Revision:

0:11c8121e645d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Jul 02 17:31:48 2017 +0000
@@ -0,0 +1,78 @@
+#include "mbed.h"
+//********************************************************
+//**               ARM Cortex M7 MCU                ******
+//**   ST Nucleo-144 Stm32F746 and Stm32F767 MCU    ******
+//**   Newton's approximation - Benchmark based on  ******
+//**   Steve Curd Adruino IDE code                  ******
+//**          Jovan Ivković - 2017.                 ******
+//**         JovanEps (jovan.eps@gmail.com).        ******
+//********************************************************
+
+DigitalOut myled(LED1);
+//DigitalOut PD13(PA_5);  //introduce D13 pin-out
+DigitalIn PD8(PF_12);  //introduce D8  *-Clear port
+Serial pc(USBTX, USBRX);
+Timer timer;
+
+#define ITERATIONS 10000000L    // number of iterations 100k-10M
+#define FFLASH 1000000            // blink LED every 100k-1M iterations
+
+//#include <TM1638.h>           // include the display library
+
+// TM1638 module(DIO, CLK, STB0)
+//TM1638 module(8, 9, 7);
+
+//*********************************
+//**         MAIN block          **
+//*********************************
+int main()
+{
+    while(true) {
+        unsigned long start, ttime;
+        unsigned long niter = ITERATIONS;
+        int LEDcounter = 0;
+        bool alternate = false;
+        long i, count = 0;
+        double x = 1.0;
+        double temp, pi = 1.0;
+
+        pc.printf(" \n Beginning  %d",niter );
+        pc.printf(" \n iterations...");
+        pc.printf("\n");
+
+        timer.start();
+        start = timer.read_ms();
+
+        for ( i = 2; i < niter; i++) {
+            x *= -1.0;
+            pi += x / (2.0f * (float) i - 1.0f);
+          // /*
+            if (LEDcounter++ > FFLASH) {
+                LEDcounter = 0;
+                if (alternate) {
+                    myled = 1;
+                    alternate = false;
+                } else {
+                    myled = 0;
+                    alternate = true;
+                }  
+                temp = (float) 40000000.0 * pi;
+
+                //module.setDisplayToDecNumber( temp, 0x80);
+            }
+          //*/           
+        }
+        ttime = timer.read_ms() - start;
+
+        pi = (double) pi * 4.0;
+
+        pc.printf("# of trials = %d \n", niter);
+        pc.printf("\n\n");
+        pc.printf("Estimate of pi = %6.10f 10 \n" , pi);
+        pc.printf("Time:   %d ms \n", ttime);
+        printf("state: %d \n", alternate);
+
+        timer.stop();
+        wait(1);
+    }
+}
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