Led Flickering with analogeWrite and ds18B20 reading
Posted: Thu Feb 18, 2016 5:21 amHi there,
I found a strange behavior while working with some Led and Temperature readings. Basically I have a dimmed Led and reading out the Temperature:
(Code is minimized to explain.)
So now, my Led is flickering every second. If I comment out "curTemp = getTemp(ds);" everything works fine. I use same code on Arduino as well without problem so I can't see why. Maybe it's just a small and stupid thing I'm not seeing, so maybe someone can help me.
Greetings
I found a strange behavior while working with some Led and Temperature readings. Basically I have a dimmed Led and reading out the Temperature:
Code: Select all
float getTemp(OneWire ow) {
byte present = 0;
byte data[12];
byte addr[8];
ow.search(addr);
ow.reset();
ow.select(addr);
ow.write(0x44, 1);
present = ow.reset();
ow.select(addr);
ow.write(0xBE);
for (byte i = 0; i < 9; i++) {
data[i] = ow.read();
}
int16_t raw = (data[1] << 8) | data[0];
return (float)raw / 16.0; //celsius;
}Code: Select all
#include <OneWire.h>
float curTemp = 0;
#define PIN_TEMP 0 // GPIO0
#define PIN_PWM 13 // N-Channel Mosfet CC Driver
OneWire ds(PIN_TEMP);
void loop()
{
analogWrite(PIN_PWM, 900);
if (currentMillis - last_print > 1000) {
last_print = currentMillis;
curTemp = getTemp(ds);
Serial.println(curTemp);
}
}
(Code is minimized to explain.)
So now, my Led is flickering every second. If I comment out "curTemp = getTemp(ds);" everything works fine. I use same code on Arduino as well without problem so I can't see why. Maybe it's just a small and stupid thing I'm not seeing, so maybe someone can help me.
Greetings