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Tasmota/tasmota/tasmota_xdrv_driver/xdrv_68_zerocrossDimmer.ino

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/*
xdrv_68_zerocrossdimmer.ino - Zero-Cross Dimmer support for Tasmota
Copyright (C) 2023 Stefan Bode
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef USE_AC_ZERO_CROSS_DIMMER
/*********************************************************************************************\
* Zero-Cross AC Dimmer PMM 1..xx use
\*********************************************************************************************/
#define XDRV_68 68
static const uint8_t TRIGGER_PERIOD = 75;
#define ZCDIMMERSET_SHOW 1
//#define ZC_DEBUG 1
struct AC_ZERO_CROSS_DIMMER {
uint32_t cycle_time_us; // Time (in micros()) of last ZC signal
uint32_t crossed_zero_at; // Time (in micros()) of last ZC signal
bool timer_iterrupt_started = false; // verification of the interrupt running
bool dimmer_in_use = false; // Check if interrupt has to be run. Is stopped if all lights off
bool fallingEdgeDimmer = false; // Work as a fallwing edge dimmer
bool triggered[MAX_PWMS];
uint32_t enable_time_us[MAX_PWMS]; // Time since last ZC pulse to enable gate pin. 0 means no disable.
uint32_t disable_time_us[MAX_PWMS]; // 99% of cycle time
uint32_t lastlight[MAX_PWMS]; // Store the light value. Set 1 if controlled through ZCDimmerSet
uint16_t detailpower[MAX_PWMS]; // replaces dimmer and light controll 0..10000. required savedata 0.
uint32_t accurracy[MAX_PWMS]; // offset of the time to fire the triac and the real time when it fired
uint32_t intr_counter = 0; // counter internally on interrerupt calls
uint32_t missed_zero_cross; // count up all missed Zero-cross events.
uint8_t actual_tigger_Period = TRIGGER_PERIOD; // copy of tigger period to change during runtime
} ac_zero_cross_dimmer;
#ifdef ESP32
static hw_timer_t *dimmer_timer = nullptr; // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
#endif
#define D_PRFX_ZCDIMMER "ZCDimmer"
#define D_CMND_DIMMERSET "Set" // Set percent as float value for dimmer
#define D_CMND_GATEENABLE "GateTime" // Override the GATE ON time DEBUG PURPOSE
const char kZCDimmerCommands[] PROGMEM = D_PRFX_ZCDIMMER "|" D_CMND_DIMMERSET "|" D_CMND_GATEENABLE;
void (* const ZCDimmerCommand[])(void) PROGMEM = {
&CmndZCDimmerSet//,&CmndZCGateEnableTime
};
extern "C" void IRAM_ATTR ACDimmerZeroCross(uint32_t time) {
ac_zero_cross_dimmer.dimmer_in_use = false;
ac_zero_cross_dimmer.cycle_time_us = time - ac_zero_cross_dimmer.crossed_zero_at;
ac_zero_cross_dimmer.crossed_zero_at = time;
for (uint8_t i=0; i < MAX_PWMS; i++) {
if (Pin(GPIO_PWM1, i) == -1) continue;
digitalWrite(Pin(GPIO_PWM1, i), LOW ^ ac_zero_cross_dimmer.fallingEdgeDimmer);
ac_zero_cross_dimmer.dimmer_in_use |= ac_zero_cross_dimmer.lastlight[i] > 0;
ac_zero_cross_dimmer.triggered[i] = false;
}
}
void ACDimmerInit()
{
for (uint8_t i = 0 ; i < 5; i++) {
ac_zero_cross_dimmer.detailpower[i] = Settings->zcdimmerset[i];
ac_zero_cross_dimmer.fallingEdgeDimmer = Settings->flag6.zcfallingedge;
}
}
extern "C" void IRAM_ATTR ACDimmerTimer_intr() {
uint32_t time_since_zc = micros() - ac_zero_cross_dimmer.crossed_zero_at;
// If no ZC signal received yet.
if (ac_zero_cross_dimmer.crossed_zero_at == 0) return;
#ifdef ZC_DEBUG
ac_zero_cross_dimmer.intr_counter++;
// Check for missed Zero-Cross event. Single failure will correct
if (time_since_zc > 10100) {
ac_zero_cross_dimmer.crossed_zero_at += ac_zero_cross_dimmer.cycle_time_us;
ac_zero_cross_dimmer.missed_zero_cross++;
time_since_zc += ac_zero_cross_dimmer.cycle_time_us;
}
#endif
ac_zero_cross_dimmer.actual_tigger_Period = TRIGGER_PERIOD;
for (uint8_t i = 0 ; i < MAX_PWMS; i++ ) {
if (Pin(GPIO_PWM1, i) == -1) continue;
if (time_since_zc + TRIGGER_PERIOD + 30 >= ac_zero_cross_dimmer.enable_time_us[i]){
// Very close to the fire event. Loop the last µseconds to wait.
#ifdef ESP8266
// on ESP8266 we can change dynamically the trigger interval.
ac_zero_cross_dimmer.actual_tigger_Period = tmin(ac_zero_cross_dimmer.actual_tigger_Period*2,ac_zero_cross_dimmer.enable_time_us[i] - time_since_zc);
#endif
#ifdef ESP32
while (time_since_zc < ac_zero_cross_dimmer.enable_time_us[i]) {
time_since_zc = micros() - ac_zero_cross_dimmer.crossed_zero_at;
}
#endif
if (time_since_zc+5 >= ac_zero_cross_dimmer.enable_time_us[i] && !ac_zero_cross_dimmer.triggered[i] ) {
digitalWrite(Pin(GPIO_PWM1, i), HIGH ^ ac_zero_cross_dimmer.fallingEdgeDimmer );
ac_zero_cross_dimmer.triggered[i] = true;
ac_zero_cross_dimmer.accurracy[i] = time_since_zc-ac_zero_cross_dimmer.enable_time_us[i];
}
if (time_since_zc >= ac_zero_cross_dimmer.disable_time_us[i]) {
digitalWrite(Pin(GPIO_PWM1, i), LOW ^ ac_zero_cross_dimmer.fallingEdgeDimmer );
}
}
}
}
#ifdef ESP8266
extern "C" uint32_t IRAM_ATTR ACDimmerTimer_intr_ESP8266() {
ACDimmerTimer_intr();
return ac_zero_cross_dimmer.actual_tigger_Period * 80;
}
#endif // ESP8266
void ACDimmerInterruptDisable(bool disable)
{
AddLog(LOG_LEVEL_INFO, PSTR("ZCD: Zero-CrossDimmer enabled: %d"),!disable);
ac_zero_cross_dimmer.timer_iterrupt_started = !disable;
if (disable) {
//stop the interrupt
#ifdef ESP32
if (dimmer_timer != nullptr) {
#if ( defined(ESP_ARDUINO_VERSION_MAJOR) && (ESP_ARDUINO_VERSION_MAJOR >= 3) )
timerStop(dimmer_timer);
#else // ESP_ARDUINO_VERSION_MAJOR >= 3
timerAlarmDisable(dimmer_timer);
#endif // ESP_ARDUINO_VERSION_MAJOR >= 3
}
#endif
} else {
for (uint8_t i = 0 ; i < MAX_PWMS; i++) {
if (Pin(GPIO_PWM1, i) != -1) {
pinMode(Pin(GPIO_PWM1, i), OUTPUT);
AddLog(LOG_LEVEL_INFO, PSTR("ZCD: Zero-CrossDimmer Pin %d set"),Pin(GPIO_PWM1, i));
}
}
#ifdef ESP32
#if ( defined(ESP_ARDUINO_VERSION_MAJOR) && (ESP_ARDUINO_VERSION_MAJOR >= 3) )
if (dimmer_timer == nullptr) {
dimmer_timer = timerBegin(1000000); // 1 MHz
timerAttachInterrupt(dimmer_timer, &ACDimmerTimer_intr);
// For ESP32, we can't use dynamic interval calculation because the timerX functions
// are not callable from ISR (placed in flash storage).
// Here we just use an interrupt firing every 75 µs.
timerAlarm(dimmer_timer, TRIGGER_PERIOD, true, 0);
}
timerStart(dimmer_timer);
#else // ESP_ARDUINO_VERSION_MAJOR >= 3
if (dimmer_timer == nullptr) {
// 80 Divider -> 1 count=1µs
dimmer_timer = timerBegin(0, 80, true);
timerAttachInterrupt(dimmer_timer, &ACDimmerTimer_intr, true);
// For ESP32, we can't use dynamic interval calculation because the timerX functions
// are not callable from ISR (placed in flash storage).
// Here we just use an interrupt firing every 75 µs.
timerAlarmWrite(dimmer_timer, TRIGGER_PERIOD , true);
}
timerAlarmEnable(dimmer_timer);
#endif // ESP_ARDUINO_VERSION_MAJOR >= 3
#endif
}
}
void ACDimmerControllTrigger(void) {
#ifdef ESP32
if (ac_zero_cross_dimmer.timer_iterrupt_started != ac_zero_cross_dimmer.dimmer_in_use) {
AddLog(LOG_LEVEL_DEBUG_MORE, PSTR("ZCD: ZeroEnable %d --> %d ... change..."),ac_zero_cross_dimmer.timer_iterrupt_started, ac_zero_cross_dimmer.dimmer_in_use);
ACDimmerInterruptDisable(!ac_zero_cross_dimmer.dimmer_in_use);
}
#endif
for (uint8_t i = 0; i < MAX_PWMS; i++){
if (Pin(GPIO_PWM1, i) == -1) continue;
ac_zero_cross_dimmer.disable_time_us[i] = (ac_zero_cross_dimmer.cycle_time_us * 99) / 100;
if (ac_zero_cross_dimmer.detailpower[i]){
ac_zero_cross_dimmer.lastlight[i] = changeUIntScale(ac_zero_cross_dimmer.detailpower[i]/10, 0, 1000, 0, 1023);
} else {
ac_zero_cross_dimmer.lastlight[i] = Light.fade_running ? Light.fade_cur_10[i] : Light.fade_start_10[i];
}
ac_zero_cross_dimmer.enable_time_us[i] = (ac_zero_cross_dimmer.cycle_time_us * (1023 - ac_zero_cross_power(ac_zero_cross_dimmer.lastlight[i]))) / 1023;
if (ac_zero_cross_dimmer.enable_time_us[i] > ac_zero_cross_dimmer.disable_time_us[i]) {
// do not set HIGH near to the zero cross
ac_zero_cross_dimmer.enable_time_us[i] = 99999;
}
#ifdef ESP32
if (ac_zero_cross_dimmer.detailpower[i]){
float state = (float)(1 - (ac_zero_cross_dimmer.detailpower[i]/10000.0));
//state = std::acos(1 - (2 * state)) / 3.14159 * ac_zero_cross_dimmer.cycle_time_us;
state = std::acos(1 - (2 * state)) / 3.14159 * ac_zero_cross_dimmer.cycle_time_us;
//AddLog(LOG_LEVEL_DEBUG_MORE, PSTR("ZCD: Float2: %*_f"),0,&state);
ac_zero_cross_dimmer.enable_time_us[i] = (uint32_t)state;
}
#endif
}
}
void ACDimmerLogging(void)
{
bool alarmEnabled = false;
uint32_t timercounter = ac_zero_cross_dimmer.intr_counter;
#ifdef ESP32
if (dimmer_timer != nullptr) {
#if ( defined(ESP_ARDUINO_VERSION_MAJOR) && (ESP_ARDUINO_VERSION_MAJOR >= 3) )
alarmEnabled = true; // we assume it's started, there is no API to check whether it's running
timercounter = (uint32_t)timerRead(dimmer_timer);
#else // ESP_ARDUINO_VERSION_MAJOR >= 3
alarmEnabled = timerAlarmEnabled(dimmer_timer);
timercounter = (uint32_t)timerRead(dimmer_timer);
#endif // ESP_ARDUINO_VERSION_MAJOR >= 3
}
#endif
AddLog(LOG_LEVEL_DEBUG, PSTR("ZCD: ZeroEnable %d -> %d, Alarm %d, intr: %ld, cycle time: %ld µs, missed zc %ld"),
ac_zero_cross_dimmer.dimmer_in_use, ac_zero_cross_dimmer.timer_iterrupt_started, alarmEnabled, timercounter,
ac_zero_cross_dimmer.cycle_time_us, ac_zero_cross_dimmer.missed_zero_cross
);
for (uint8_t i = 0; i < MAX_PWMS; i++){
if (Pin(GPIO_PWM1, i) == -1) continue;
AddLog(LOG_LEVEL_DEBUG_MORE, PSTR("ZCD: PWM[%d] en: %ld µs, dis: %ld µs, fade: %d, cur: %d, end: %d, lastlight: %d, acc: %ld"),
i+1, ac_zero_cross_dimmer.enable_time_us[i], ac_zero_cross_dimmer.disable_time_us[i],
Light.fade_cur_10[i], Light.fade_start_10[i], Light.fade_end_10[i], ac_zero_cross_dimmer.lastlight[i],
ac_zero_cross_dimmer.accurracy[i]
);
if (ac_zero_cross_dimmer.accurracy[i]) ac_zero_cross_dimmer.accurracy[i]=0;
}
}
#ifdef USE_WEBSERVER
#ifdef ZCDIMMERSET_SHOW
void ACDimmerShow(void)
{
char c_ZCDimmerSetBuffer[8];
for (uint8_t i = 0; i < MAX_PWMS; i++){
if (Pin(GPIO_PWM1, i) == -1) continue;
if (ac_zero_cross_dimmer.detailpower[i]){
dtostrfd(ac_zero_cross_dimmer.detailpower[i]/100.0, 2, c_ZCDimmerSetBuffer);
WSContentSend_PD(PSTR("{s}ZCDimmer%d{m}%s %%{e}"), i+1, c_ZCDimmerSetBuffer);
}
}
}
#endif // ZCDIMMERSET_SHOW
#endif // USE_WEBSERVER
/*********************************************************************************************\
* Commands
\*********************************************************************************************/
void CmndZCDimmerSet(void)
{
if ((XdrvMailbox.index > 0) && (XdrvMailbox.index <= MAX_PWMS)) {
if (XdrvMailbox.data_len > 0) {
Settings->zcdimmerset[XdrvMailbox.index-1] = ac_zero_cross_dimmer.detailpower[XdrvMailbox.index-1] = (uint16_t)(100 * CharToFloat(XdrvMailbox.data));
}
ResponseCmndIdxFloat((float)(ac_zero_cross_dimmer.detailpower[XdrvMailbox.index-1]) / 100, 2);
}
}
/*********************************************************************************************\
* Interface
\*********************************************************************************************/
bool Xdrv68(uint32_t function)
{
bool result = false;
if (Settings->flag4.zerocross_dimmer) {
switch (function) {
case FUNC_INIT:
ACDimmerInit();
#ifdef ESP32
//ACDimmerInterruptDisable(false);
#endif
#ifdef ESP8266
setTimer1Callback(&ACDimmerTimer_intr_ESP8266);
#endif
break;
case FUNC_EVERY_SECOND:
ACDimmerLogging();
break;
case FUNC_EVERY_100_MSECOND:
ACDimmerControllTrigger();
break;
case FUNC_INTERRUPT_STOP:
ACDimmerInterruptDisable(true);
break;
case FUNC_INTERRUPT_START:
ACDimmerInterruptDisable(false);
break;
case FUNC_COMMAND:
result = DecodeCommand(kZCDimmerCommands, ZCDimmerCommand);
break;
#ifdef USE_WEBSERVER
#ifdef ZCDIMMERSET_SHOW
case FUNC_WEB_SENSOR:
ACDimmerShow();
break;
#endif // ZCDIMMERSET_SHOW
#endif // USE_WEBSERVER
case FUNC_ACTIVE:
result = true;
break;
}
}
return result;
}
#endif // USE_AC_ZERO_CROSS_DIMMER
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