Sha256: 5961176aa7e90aa2a2dfa3475b4113f88cee38cff30ece58d72e67f5acd819ef
Contents?: true
Size: 941 Bytes
Versions: 23
Compression:
Stored size: 941 Bytes
Contents
class Hysteresis < ArduinoPlugin
# jdbarnhart
# 20080728
#
#
# purpose
#
# add hysteresis to analog readings, typically sensors or potentiometers
#
# use
# two steps
#
# one
# declare :device => :sensor
# example:
# input_pin 1, :as => :sensor_one, :device => :sensor
#
# two
# instead of:
# my_lcd.print analogRead sensor_two
# use add_hyst
# my_lcd.print sensor_one.with_hyst 4
#
# # note, 4 is the amount of hysteresis
#
#
void with_hysteresis(int pin, int amt)
{
with_hyst(pin, amt);
}
int with_hyst(int pin, int amt)
{
int read;
unsigned int i;
read = analogRead(pin);
for (i = 0; i < (int) (sizeof(hyst) / sizeof(hyst[0])); i++) {
if (pin == hyst[i].pin) {
if (((read - hyst[i].state) > amt ) || ((hyst[i].state - read) > amt )) {
hyst[i].state = read;
return hyst[i].state;
}
else
return hyst[i].state;
}
}
}
end
Version data entries
23 entries across 23 versions & 4 rubygems