grumpydevelop/cimdit
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optional low pass filter for analog values

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This commit is contained in:
Sascha Nitsch 2022-07-22 12:22:16 +02:00
parent 9793d4e57b
commit 3a234b1969
2 changed files with 6 additions and 1 deletions
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4
cimdithal.cpp
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@ -11,7 +11,6 @@
// library includes
#include <Adafruit_MCP23X17.h>
// own includes
#include "cimdithal.h"
@ -109,6 +108,9 @@ void CimditHAL::readFromHardware(bool interrupt) {
int16_t lastAnalogValue = m_currentAnalogValues[m_analogNum];
// scan analog value
m_currentAnalogValues[m_analogNum] = analogRead(ANALOG_IN);
#ifdef ANALOG_LOW_PASS_FACTOR
m_currentAnalogValues[m_analogNum] = lastAnalogValue - (ANALOG_LOW_PASS_FACTOR * (lastAnalogValue - m_currentAnalogValues[m_analogNum]));
#endif
// set changed bits
if (lastAnalogValue != m_currentAnalogValues[m_analogNum]) {
//if (abs(lastAnalogValue - m_currentAnalogValues[m_analogNum]) > 1) {

3
defines.h
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@ -36,6 +36,9 @@
/// dead zone (noise) around the center of the joystick Y axcs
#define JOYSTICK_DEAD_ZONE_Y 20
/// optional analog filtering higher values mean faster changer, but more noise
#define ANALOG_LOW_PASS_FACTOR 0.95
/// i2c address of the external EEPROM
#define EXTERNAL_EEPROM 0x50