mirror of https://github.com/arendst/Tasmota.git
Merge pull request #8606 from halfbakery/support_switches_with_ac_detection
Add support for switches using an AC detection circuitry
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commit
7e8c1368a8
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@ -26,6 +26,8 @@
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\*********************************************************************************************/
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const uint8_t SWITCH_PROBE_INTERVAL = 10; // Time in milliseconds between switch input probe
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const uint8_t SWITCH_FAST_PROBE_INTERVAL =2;// Time in milliseconds between switch input probe for AC detection
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const uint8_t AC_PERIOD = (20 + SWITCH_FAST_PROBE_INTERVAL - 1) / SWITCH_FAST_PROBE_INTERVAL; // Duration of an AC wave in probe intervals
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#include <Ticker.h>
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@ -38,6 +40,7 @@ struct SWITCH {
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uint8_t last_state[MAX_SWITCHES]; // Last wall switch states
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uint8_t hold_timer[MAX_SWITCHES] = { 0 }; // Timer for wallswitch push button hold
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uint8_t virtual_state[MAX_SWITCHES]; // Virtual switch states
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uint8_t first_change = 0;
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uint8_t present = 0;
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} Switch;
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@ -81,60 +84,136 @@ void SwitchProbe(void)
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{
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if (uptime < 4) { return; } // Block GPIO for 4 seconds after poweron to workaround Wemos D1 / Obi RTS circuit
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uint8_t state_filter = Settings.switch_debounce / SWITCH_PROBE_INTERVAL; // 5, 10, 15
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uint8_t force_high = (Settings.switch_debounce % 10) &1; // 51, 101, 151 etc
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uint8_t force_low = (Settings.switch_debounce % 10) &2; // 52, 102, 152 etc
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uint8_t state_filter;
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uint8_t debounce_flags = Settings.switch_debounce % 10;
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uint8_t force_high = debounce_flags &1; // 51, 101, 151 etc
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uint8_t force_low = debounce_flags &2; // 52, 102, 152 etc
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uint8_t ac_detect = debounce_flags == 9;
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uint8_t switch_probe_interval;
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uint8_t first_change = Switch.first_change;
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if (ac_detect) {
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switch_probe_interval = SWITCH_FAST_PROBE_INTERVAL;
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if (Settings.switch_debounce < 2 * AC_PERIOD * SWITCH_FAST_PROBE_INTERVAL + 9) {
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state_filter = 2 * AC_PERIOD;
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} else if (Settings.switch_debounce > (0x7f - 2 * AC_PERIOD) * SWITCH_FAST_PROBE_INTERVAL) {
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state_filter = 0x7f;
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} else {
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state_filter = (Settings.switch_debounce - 9) / SWITCH_FAST_PROBE_INTERVAL;
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}
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} else {
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switch_probe_interval = SWITCH_PROBE_INTERVAL;
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state_filter = Settings.switch_debounce / SWITCH_PROBE_INTERVAL; // 5, 10, 15
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}
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for (uint32_t i = 0; i < MAX_SWITCHES; i++) {
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if (PinUsed(GPIO_SWT1, i)) {
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// Olimex user_switch2.c code to fix 50Hz induced pulses
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if (1 == digitalRead(Pin(GPIO_SWT1, i))) {
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if (force_high) { // Enabled with SwitchDebounce x1
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if (1 == Switch.virtual_state[i]) {
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Switch.state[i] = state_filter; // With noisy input keep current state 1 unless constant 0
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if (ac_detect) { // Enabled with SwitchDebounce x9
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Switch.state[i] |= 0x80;
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if (Switch.state[i] > 0x80) {
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Switch.state[i]--;
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if (0x80 == Switch.state[i]) {
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Switch.virtual_state[i] = 0;
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Switch.first_change = false;
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}
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}
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}
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} else {
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if (Switch.state[i] < state_filter) {
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Switch.state[i]++;
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if (state_filter == Switch.state[i]) {
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Switch.virtual_state[i] = 1;
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if (force_high) { // Enabled with SwitchDebounce x1
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if (1 == Switch.virtual_state[i]) {
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Switch.state[i] = state_filter; // With noisy input keep current state 1 unless constant 0
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}
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}
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if (Switch.state[i] < state_filter) {
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Switch.state[i]++;
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if (state_filter == Switch.state[i]) {
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Switch.virtual_state[i] = 1;
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}
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}
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}
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} else {
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if (force_low) { // Enabled with SwitchDebounce x2
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if (0 == Switch.virtual_state[i]) {
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Switch.state[i] = 0; // With noisy input keep current state 0 unless constant 1
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if (ac_detect) { // Enabled with SwitchDebounce x9
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/*
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* Moes MS-104B and similar devices using an AC detection circuitry
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* on their switch inputs generating an ~4 ms long low pulse every
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* AC wave. We start the time measurement on the falling edge.
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*
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* state: bit7: previous state, bit6..0: counter
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*/
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if (Switch.state[i] & 0x80) {
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Switch.state[i] &= 0x7f;
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if (Switch.state[i] < state_filter - 2 * AC_PERIOD) {
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Switch.state[i] += 2 * AC_PERIOD;
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} else {
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Switch.state[i] = state_filter;
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Switch.virtual_state[i] = 1;
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if (first_change) {
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Switch.last_state[i] = 1;
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Switch.first_change = false;
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}
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}
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} else {
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if (Switch.state[i] > 0x00) {
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Switch.state[i]--;
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if (0x00 == Switch.state[i]) {
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Switch.virtual_state[i] = 0;
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Switch.first_change = false;
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}
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}
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}
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}
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} else {
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if (Switch.state[i] > 0) {
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Switch.state[i]--;
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if (0 == Switch.state[i]) {
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Switch.virtual_state[i] = 0;
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if (force_low) { // Enabled with SwitchDebounce x2
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if (0 == Switch.virtual_state[i]) {
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Switch.state[i] = 0; // With noisy input keep current state 0 unless constant 1
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}
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}
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if (Switch.state[i] > 0) {
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Switch.state[i]--;
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if (0 == Switch.state[i]) {
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Switch.virtual_state[i] = 0;
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}
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}
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}
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}
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}
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}
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TickerSwitch.attach_ms(SWITCH_PROBE_INTERVAL, SwitchProbe); // Re-arm as core 2.3.0 does only support ONCE mode
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TickerSwitch.attach_ms(switch_probe_interval, SwitchProbe); // Re-arm as core 2.3.0 does only support ONCE mode
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}
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void SwitchInit(void)
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{
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uint8_t ac_detect = Settings.switch_debounce % 10 == 9;
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Switch.present = 0;
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for (uint32_t i = 0; i < MAX_SWITCHES; i++) {
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Switch.last_state[i] = 1; // Init global to virtual switch state;
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if (PinUsed(GPIO_SWT1, i)) {
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Switch.present++;
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pinMode(Pin(GPIO_SWT1, i), bitRead(Switch.no_pullup_mask, i) ? INPUT : ((16 == Pin(GPIO_SWT1, i)) ? INPUT_PULLDOWN_16 : INPUT_PULLUP));
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Switch.last_state[i] = digitalRead(Pin(GPIO_SWT1, i)); // Set global now so doesn't change the saved power state on first switch check
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if (ac_detect) {
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Switch.state[i] = 0x80 + 2 * AC_PERIOD;
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Switch.last_state[i] = 0; // Will set later in the debouncing code
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} else {
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Switch.last_state[i] = digitalRead(Pin(GPIO_SWT1, i)); // Set global now so doesn't change the saved power state on first switch check
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}
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}
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Switch.virtual_state[i] = Switch.last_state[i];
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}
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if (Switch.present) { TickerSwitch.attach_ms(SWITCH_PROBE_INTERVAL, SwitchProbe); }
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if (Switch.present) {
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if (ac_detect) {
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TickerSwitch.attach_ms(SWITCH_FAST_PROBE_INTERVAL, SwitchProbe);
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Switch.first_change = true;
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} else {
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TickerSwitch.attach_ms(SWITCH_PROBE_INTERVAL, SwitchProbe);
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}
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}
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}
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/*********************************************************************************************\
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