old pwm
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44
include/pwm.h
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44
include/pwm.h
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#pragma once
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#include "PCA9685.h"
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#define SENSOR1 15
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#define SENSOR2 12
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#define INT_TIME 20 // interrupt intervall [ms]
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class Treppe {
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private:
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uint8_t stairs;
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uint16_t time_per_stair = 200; // dimmtime per stair [ms]
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uint16_t idle_brightness = 0;
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uint16_t active_brightness = 1048;
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uint8_t direction = 0;
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uint8_t switch_direction = 0;
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uint8_t state = 0;
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uint8_t switch_state = 0;
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uint8_t finish = 1;
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// initialize with i2c-Address 0, use Wire Library
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PCA9685 pwmController;
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uint8_t softstart_led(uint8_t led, uint16_t startval, uint16_t stopval);
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void ledsequence();
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public:
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Treppe(uint8_t _stairs) : stairs(_stairs){}
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void task(); // call periodically
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void setup();
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// Parameter section
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uint16_t setIdle(uint16_t _idle_brightness);
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uint16_t setActive(uint16_t _active_brightness);
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uint16_t setTime(uint16_t _time_per_stair);
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// Runtime Parameter section
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uint8_t setDirection(uint8_t _direction);
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uint8_t setState(uint8_t _state);
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uint8_t getState() { return state;};
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uint8_t getDirection() {return direction;};
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};
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183
src/pwm.cpp
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183
src/pwm.cpp
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#include "pwm.h"
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uint8_t Treppe::softstart_led(uint8_t led, uint16_t startval, uint16_t stopval){
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/*
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softstart task
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- get's called at regular intervals (1ms at the moment)
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- dimms single led (0 - 15, PCA9685 outputs) with linear intervals vom startval to stopval
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- calculates pwm steps depending on startval, stopval and timeinterval
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- -> results in constanst speed
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- returns 1 if led dimming is running
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- returns 0 if led dimming is finished
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*/
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static uint8_t lastled = 255;
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static float current_pwm = 0;
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static float stepsize = 1.0;
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if(led != lastled){
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pwmController.setChannelPWM(led, (uint16_t)startval);
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lastled = led;
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current_pwm = startval;
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stepsize = INT_TIME*abs(stopval - startval)/(float)time_per_stair; // only valid at 1ms function call interval
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return 1;
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}
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if(startval > stopval){
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current_pwm -= stepsize;
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}
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else {
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current_pwm += stepsize;
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}
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Serial.println((uint16_t)current_pwm);
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pwmController.setChannelPWM(led, (uint16_t)current_pwm);
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if(current_pwm > stopval - stepsize && current_pwm < stopval + stepsize){
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if(stopval == 0) pwmController.setChannelPWM(led, 0);
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return 0;
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}
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return 1;
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}
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void Treppe::ledsequence(){
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static int8_t led = 0;
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static uint16_t brightness = 0;
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static uint16_t lastbrightness = 0;
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static uint16_t status = 0;
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uint16_t status_build = 0;
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status_build |= direction << 8;
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status_build |= state;
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if(status_build != status){ // check if any parameter changed
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finish = 0; // set state unfinished -> start action
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if(direction) led = 0; // reset led counter depending of direction
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else led = stairs-1;
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if(state){
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brightness = active_brightness; // set brightness value depending of on/off
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lastbrightness = idle_brightness;
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}
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else{
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brightness = idle_brightness;
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lastbrightness = active_brightness;
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}
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status = status_build; // set parameter memory
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Serial.print("----Status Changed! onoff: ");
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Serial.print(state);
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Serial.print(" dir: ");
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Serial.println(direction);
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}
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if(!finish){ // finish == 0 -> action pending
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if(!softstart_led(led,lastbrightness, brightness)){
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Serial.print("one LED finished: ");
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Serial.print(led);
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Serial.print(" last: ");
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Serial.print(lastbrightness);
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Serial.print(" curr: ");
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Serial.println(brightness);
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if(direction){
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led++;
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if(led >= stairs) {
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finish = 1;
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//lastbrightness = brightness;
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}
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}
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else{
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led--;
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if(led < 0){
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//lastbrightness = brightness;
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finish = 1;
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}
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}
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}
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}
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}
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void Treppe::setup(){
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pwmController.resetDevices();
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// Deactive PCA9685 Phase Balancer due to LED Flickering
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// https://github.com/NachtRaveVL/PCA9685-Arduino/issues/15
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// see also lib/PCA9685-Arduin/PCA9685.h:204
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pwmController.init(PCA9685_PhaseBalancer_None);
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pwmController.setPWMFrequency(200);
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pwmController.setAllChannelsPWM(idle_brightness);
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pinMode(SENSOR1, INPUT);
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pinMode(SENSOR2, INPUT);
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Serial.println("Hello from Treppe");
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Serial.print("Treppe: initial parameters: stairs=");
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Serial.println(stairs);
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}
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void Treppe::task(){
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if(finish){
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direction = switch_direction;
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state = switch_state;
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}
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static uint8_t last_sensor_state[2] = {0,0};
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uint8_t current_sensor_state[2] = {0,0};
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current_sensor_state[0] = digitalRead(SENSOR1);
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current_sensor_state[1] = digitalRead(SENSOR2);
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if(current_sensor_state[0] && !last_sensor_state[0] && state == 0){
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setDirection(1);
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setState(1);
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}
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if(current_sensor_state[1] && !last_sensor_state[1] && state == 0){
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setDirection(0);
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setState(1);
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}
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// first switch - off approach, use timer later
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if(!current_sensor_state[0] && last_sensor_state[0] && state == 1){
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setDirection(1);
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setState(0);
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}
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if(!current_sensor_state[1] && last_sensor_state[1] && state == 1){
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setDirection(0);
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setState(0);
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}
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last_sensor_state[0] = current_sensor_state[0];
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last_sensor_state[1] = current_sensor_state[1];
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ledsequence();
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}
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uint16_t Treppe::setIdle(uint16_t _idle_brightness){
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idle_brightness = _idle_brightness;
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Serial.println("Treppe: idle brightness changed!");
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return idle_brightness;
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}
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uint16_t Treppe::setActive(uint16_t _active_brightness){
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active_brightness = _active_brightness;
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Serial.println("Treppe: active brightness changed!");
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return active_brightness;
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}
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uint16_t Treppe::setTime(uint16_t _time_per_stair){
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time_per_stair = _time_per_stair;
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Serial.println("Treppe: time changed!");
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return time_per_stair;
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}
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uint8_t Treppe::setDirection(uint8_t _direction){
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switch_direction = _direction;
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Serial.println("Treppe: Direction changed!");
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if(finish) Serial.println("apply direction request immediately");
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else Serial.println("currently active, dir change afterwards");
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// to do: implement state command variable to determine dimm-state
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return switch_direction;
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}
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uint8_t Treppe::setState(uint8_t _state){
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if(state == _state) return 1;
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else{
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switch_state = _state;
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Serial.println("Treppe: State Request changed!");
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if(finish) Serial.println("apply state request immediately");
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else Serial.println("currently active, state changes after activity");
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}
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return 0;
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}
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