見たまんま。シールドによってはショートする危険性もある。
まあこうするしかないよね。
Netduino plusという、同じようにイーサの口を持ったボードはこうなってる。
プラスチック製で絶縁されており、基板の下に逃がしてあるので背が低い。
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/*GR-SAKURA Sketch Template Version: V1.00*/
#include <rxduino.h>
#define INTERVAL 100
#define ITERATIONS 10000 /* 1 Million Whetstone instructions */
#include "math.h"
#define PREC float
PREC x1, x2, x3, x4, x, y, z, t, t1, t2;
PREC e1[4];
int i, j, k, l, n1, n2, n3, n4, n6, n7, n8, n9, n10, n11;
void setup()
{
Serial.begin(9600);
pinMode(PIN_LED0,OUTPUT);
pinMode(PIN_LED1,OUTPUT);
pinMode(PIN_LED2,OUTPUT);
pinMode(PIN_LED3,OUTPUT);
}
void pa(PREC *e)
{
register int j;
j = 0;
lab:
e[0] = ( e[0] + e[1] + e[2] - e[3] ) * t;
e[1] = ( e[0] + e[1] - e[2] + e[3] ) * t;
e[2] = ( e[0] - e[1] + e[2] + e[3] ) * t;
e[3] = ( -e[0] + e[1] + e[2] + e[3] ) / t2;
j += 1;
if (j < 6)
goto lab;
return;
}
void p3(PREC x, PREC y, PREC *z)
{
x = t * (x + y);
y = t * (x + y);
*z = (x + y) /t2;
return;
}
void p0()
{
e1[j] = e1[k];
e1[k] = e1[l];
e1[l] = e1[j];
return;
}
#ifdef POUT
pout(int n, int j, int k, PREC x1, PREC x2, PREC x3, PREC x4)
{
printf("%6d%6d%6d %5e %5e %5e %5e\n",
n, j, k, x1, x2, x3, x4);
}
#endif
void testfloat() {
/* initialize constants */
t = 0.499975;
t1 = 0.50025;
t2 = 2.0;
/* set values of module weights */
n1 = 0 * ITERATIONS;
n2 = 12 * ITERATIONS;
n3 = 14 * ITERATIONS;
n4 = 345 * ITERATIONS;
n6 = 210 * ITERATIONS;
n7 = 32 * ITERATIONS;
n8 = 899 * ITERATIONS;
n9 = 616 * ITERATIONS;
n10 = 0 * ITERATIONS;
n11 = 93 * ITERATIONS;
/* MODULE 1: simple identifiers */
digitalWrite(PIN_LED0, 1);
x1 = 1.0;
x2 = x3 = x4 = -1.0;
for(i = 1; i <= n1; i += 1) {
x1 = ( x1 + x2 + x3 - x4 ) * t;
x2 = ( x1 + x2 - x3 - x4 ) * t;
x3 = ( x1 - x2 + x3 + x4 ) * t;
x4 = (-x1 + x2 + x3 + x4 ) * t;
}
#ifdef POUT
pout(n1, n1, n1, x1, x2, x3, x4);
#endif
/* MODULE 2: array elements */
digitalWrite(PIN_LED1, 1);
e1[0] = 1.0;
e1[1] = e1[2] = e1[3] = -1.0;
for (i = 1; i <= n2; i +=1) {
e1[0] = ( e1[0] + e1[1] + e1[2] - e1[3] ) * t;
e1[1] = ( e1[0] + e1[1] - e1[2] + e1[3] ) * t;
e1[2] = ( e1[0] - e1[1] + e1[2] + e1[3] ) * t;
e1[3] = (-e1[0] + e1[1] + e1[2] + e1[3] ) * t;
}
#ifdef POUT
pout(n2, n3, n2, e1[0], e1[1], e1[2], e1[3]);
#endif
/* MODULE 3: array as parameter */
digitalWrite(PIN_LED2, 1);
for (i = 1; i <= n3; i += 1)
pa(e1);
#ifdef POUT
pout(n3, n2, n2, e1[0], e1[1], e1[2], e1[3]);
#endif
/* MODULE 4: conditional jumps */
digitalWrite(PIN_LED3, 1);
j = 1;
for (i = 1; i <= n4; i += 1) {
if (j == 1)
j = 2;
else
j = 3;
if (j > 2)
j = 0;
else
j = 1;
if (j < 1 )
j = 1;
else
j = 0;
}
#ifdef POUT
pout(n4, j, j, x1, x2, x3, x4);
#endif
/* MODULE 5: omitted */
/* MODULE 6: integer arithmetic */
digitalWrite(PIN_LED0, 0);
j = 1;
k = 2;
l = 3;
for (i = 1; i <= n6; i += 1) {
j = j * (k - j) * (l -k);
k = l * k - (l - j) * k;
l = (l - k) * (k + j);
e1[l - 2] = j + k + l; /* C arrays are zero based */
e1[k - 2] = j * k * l;
}
#ifdef POUT
pout(n6, j, k, e1[0], e1[1], e1[2], e1[3]);
#endif
/* MODULE 7: trig. functions */
digitalWrite(PIN_LED1, 0);
x = y = 0.5;
for(i = 1; i <= n7; i +=1) {
x = t * atan(t2*sin(x)*cos(x)/(cos(x+y)+cos(x-y)-1.0));
y = t * atan(t2*sin(y)*cos(y)/(cos(x+y)+cos(x-y)-1.0));
// x = x * 2;
// y = y * 2;
}
#ifdef POUT
pout(n7, j, k, x, x, y, y);
#endif
/* MODULE 8: procedure calls */
digitalWrite(PIN_LED2, 0);
x = y = z = 1.0;
for (i = 1; i <= n8; i +=1)
p3(x, y, &z);
#ifdef POUT
pout(n8, j, k, x, y, z, z);
#endif
/* MODULE9: array references */
digitalWrite(PIN_LED3, 0);
j = 1;
k = 2;
l = 3;
e1[0] = 1.0;
e1[1] = 2.0;
e1[2] = 3.0;
for(i = 1; i <= n9; i += 1)
p0();
#ifdef POUT
pout(n9, j, k, e1[0], e1[1], e1[2], e1[3]);
#endif
/* MODULE10: integer arithmetic */
digitalWrite(PIN_LED0, 1);
digitalWrite(PIN_LED1, 1);
j = 2;
k = 3;
for(i = 1; i <= n10; i +=1) {
j = j + k;
k = j + k;
j = k - j;
k = k - j - j;
}
#ifdef POUT
pout(n10, j, k, x1, x2, x3, x4);
#endif
/* MODULE11: standard functions */
digitalWrite(PIN_LED2, 1);
digitalWrite(PIN_LED3, 1);
x = 0.75;
for(i = 1; i <= n11; i +=1)
x = sqrt( exp( log(x) / t1));
// x = x / 2;
#ifdef POUT
pout(n11, j, k, x, x, x, x);
#endif
// -----------------------------
}
void loop() {
digitalWrite(PIN_LED0, 0);
digitalWrite(PIN_LED1, 0);
digitalWrite(PIN_LED2, 0);
digitalWrite(PIN_LED3, 0);
Serial.println(millis());
testfloat();
}