Comments on: Moving code from Arduino to Raspberry Pi

By: Nick

Nick — Sun, 28 Apr 2013 09:30:39 +0000

Hi Schuyler, I have archived my working folder and uploaded it to http://www.brokentoaster.com/RasPi/files/WiringPi_nick.tgz I hope this helps, my finished example from this blog post is in the sub directory mlmc_temp. I may have modified some of the other files in the WiringPi Library or other examples.

By: Schuyler

Schuyler — Fri, 05 Apr 2013 01:24:00 +0000

Is there any chance you could share your libraries and example code? I am actually currently trying to get thermocouple readings from a MAX6675 to my raspberry pi, and have had no luck so far…

By: Nick

Nick — Thu, 05 Jul 2012 16:43:50 +0000

Absolutely. Have a look at the examples at the WiringPi examples page. You should be able to use the PWM signal on pin 1 provided your happy with a 3.3V output and changing the scale factor from 0-255 to 0-1023.

By: cellfreak

cellfreak — Thu, 05 Jul 2012 13:08:53 +0000

Could this code be converted to the Raspberry Pi. Either for a PWM output or a 0-100 pin output to drive an LED for a reef tank.

byte MoonPhase()
{
int m,d,y;
int yy,mm;
long K1,K2,K3,J,V;
byte PWMvalue;
m = month();
d = day();
y = year();
yy = y-((12-m)/10);
mm = m+9;
if (mm>=12) mm -= 12;
K1 = 365.25*(yy+4712);
K2 = 30.6*mm+.5;
K3 = int(int((yy/100)+49)*.75)-38;
J = K1+K2+d+59-K3;
V = (J-2451550.1)/0.29530588853;
V -= int(V/100)*100;
V = abs(V-50);
PWMvalue = 4*abs(50-V); // 5.12=100% 4=~80%
//pinMode(lowATOPin,OUTPUT);
return (PWMvalue*100)/255;
}

It returns 0-100.
You can comment the kast line and return PWMvalue for 0-255.