Jovan Ivković / Mbed 2 deprecated Newton_s_approximation_bench

Newton's approximation - Benchmark based on Steve Curd Adruino IDE code for STM32 Nucleo F7 ARM M7 MCU's

Dependencies:   mbed

main.cpp@0:11c8121e645d, 2017-07-02 (annotated)

Committer:
JovanEps
Date:
Sun Jul 02 17:31:48 2017 +0000
Revision:
0:11c8121e645d
RC 1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
JovanEps 0:11c8121e645d 1 #include "mbed.h"
JovanEps 0:11c8121e645d 2 //********************************************************
JovanEps 0:11c8121e645d 3 //** ARM Cortex M7 MCU ******
JovanEps 0:11c8121e645d 4 //** ST Nucleo-144 Stm32F746 and Stm32F767 MCU ******
JovanEps 0:11c8121e645d 5 //** Newton's approximation - Benchmark based on ******
JovanEps 0:11c8121e645d 6 //** Steve Curd Adruino IDE code ******
JovanEps 0:11c8121e645d 7 //** Jovan Ivković - 2017. ******
JovanEps 0:11c8121e645d 8 //** JovanEps (jovan.eps@gmail.com). ******
JovanEps 0:11c8121e645d 9 //********************************************************
JovanEps 0:11c8121e645d 10
JovanEps 0:11c8121e645d 11 DigitalOut myled(LED1);
JovanEps 0:11c8121e645d 12 //DigitalOut PD13(PA_5); //introduce D13 pin-out
JovanEps 0:11c8121e645d 13 DigitalIn PD8(PF_12); //introduce D8 *-Clear port
JovanEps 0:11c8121e645d 14 Serial pc(USBTX, USBRX);
JovanEps 0:11c8121e645d 15 Timer timer;
JovanEps 0:11c8121e645d 16
JovanEps 0:11c8121e645d 17 #define ITERATIONS 10000000L // number of iterations 100k-10M
JovanEps 0:11c8121e645d 18 #define FFLASH 1000000 // blink LED every 100k-1M iterations
JovanEps 0:11c8121e645d 19
JovanEps 0:11c8121e645d 20 //#include <TM1638.h> // include the display library
JovanEps 0:11c8121e645d 21
JovanEps 0:11c8121e645d 22 // TM1638 module(DIO, CLK, STB0)
JovanEps 0:11c8121e645d 23 //TM1638 module(8, 9, 7);
JovanEps 0:11c8121e645d 24
JovanEps 0:11c8121e645d 25 //*********************************
JovanEps 0:11c8121e645d 26 //** MAIN block **
JovanEps 0:11c8121e645d 27 //*********************************
JovanEps 0:11c8121e645d 28 int main()
JovanEps 0:11c8121e645d 29 {
JovanEps 0:11c8121e645d 30 while(true) {
JovanEps 0:11c8121e645d 31 unsigned long start, ttime;
JovanEps 0:11c8121e645d 32 unsigned long niter = ITERATIONS;
JovanEps 0:11c8121e645d 33 int LEDcounter = 0;
JovanEps 0:11c8121e645d 34 bool alternate = false;
JovanEps 0:11c8121e645d 35 long i, count = 0;
JovanEps 0:11c8121e645d 36 double x = 1.0;
JovanEps 0:11c8121e645d 37 double temp, pi = 1.0;
JovanEps 0:11c8121e645d 38
JovanEps 0:11c8121e645d 39 pc.printf(" \n Beginning %d",niter );
JovanEps 0:11c8121e645d 40 pc.printf(" \n iterations...");
JovanEps 0:11c8121e645d 41 pc.printf("\n");
JovanEps 0:11c8121e645d 42
JovanEps 0:11c8121e645d 43 timer.start();
JovanEps 0:11c8121e645d 44 start = timer.read_ms();
JovanEps 0:11c8121e645d 45
JovanEps 0:11c8121e645d 46 for ( i = 2; i < niter; i++) {
JovanEps 0:11c8121e645d 47 x *= -1.0;
JovanEps 0:11c8121e645d 48 pi += x / (2.0f * (float) i - 1.0f);
JovanEps 0:11c8121e645d 49 // /*
JovanEps 0:11c8121e645d 50 if (LEDcounter++ > FFLASH) {
JovanEps 0:11c8121e645d 51 LEDcounter = 0;
JovanEps 0:11c8121e645d 52 if (alternate) {
JovanEps 0:11c8121e645d 53 myled = 1;
JovanEps 0:11c8121e645d 54 alternate = false;
JovanEps 0:11c8121e645d 55 } else {
JovanEps 0:11c8121e645d 56 myled = 0;
JovanEps 0:11c8121e645d 57 alternate = true;
JovanEps 0:11c8121e645d 58 }
JovanEps 0:11c8121e645d 59 temp = (float) 40000000.0 * pi;
JovanEps 0:11c8121e645d 60
JovanEps 0:11c8121e645d 61 //module.setDisplayToDecNumber( temp, 0x80);
JovanEps 0:11c8121e645d 62 }
JovanEps 0:11c8121e645d 63 //*/
JovanEps 0:11c8121e645d 64 }
JovanEps 0:11c8121e645d 65 ttime = timer.read_ms() - start;
JovanEps 0:11c8121e645d 66
JovanEps 0:11c8121e645d 67 pi = (double) pi * 4.0;
JovanEps 0:11c8121e645d 68
JovanEps 0:11c8121e645d 69 pc.printf("# of trials = %d \n", niter);
JovanEps 0:11c8121e645d 70 pc.printf("\n\n");
JovanEps 0:11c8121e645d 71 pc.printf("Estimate of pi = %6.10f 10 \n" , pi);
JovanEps 0:11c8121e645d 72 pc.printf("Time: %d ms \n", ttime);
JovanEps 0:11c8121e645d 73 printf("state: %d \n", alternate);
JovanEps 0:11c8121e645d 74
JovanEps 0:11c8121e645d 75 timer.stop();
JovanEps 0:11c8121e645d 76 wait(1);
JovanEps 0:11c8121e645d 77 }
JovanEps 0:11c8121e645d 78 }