Fix ESP32C3 relay toggle on restart

Fix ESP32C3 relay toggle on restart (#20030)

tasmota/tasmota_support/support.ino

@@ -1442,30 +1442,16 @@ void SetPin(uint32_t lpin, uint32_t gpio) {
   TasmotaGlobal.gpio_pin[lpin] = gpio;
 }
 
-#ifdef CONFIG_IDF_TARGET_ESP32C3
-#include "driver/gpio.h"                         // Include needed for Arduino 3
-#endif
-
 void DigitalWrite(uint32_t gpio_pin, uint32_t index, uint32_t state) {
   static uint32_t pinmode_init[2] = { 0 };       // Pins 0 to 63 !!!
 
   if (PinUsed(gpio_pin, index)) {
     uint32_t pin = Pin(gpio_pin, index) & 0x3F;  // Fix possible overflow over 63 gpios
-#ifdef CONFIG_IDF_TARGET_ESP32C3
-//    if (GPIO_REL1 == gpio_pin) {
-      gpio_hold_dis((gpio_num_t)pin);            // Allow state change
-//    }
-#endif
     if (!bitRead(pinmode_init[pin / 32], pin % 32)) {
       bitSet(pinmode_init[pin / 32], pin % 32);
       pinMode(pin, OUTPUT);
     }
     digitalWrite(pin, state &1);
-#ifdef CONFIG_IDF_TARGET_ESP32C3
-    if (GPIO_REL1 == gpio_pin) {
-      gpio_hold_en((gpio_num_t)pin);             // Retain the state when the chip or system is reset, for example, when watchdog time-out or Deep-sleep
-    }
-#endif
   }
 }
 

tasmota/tasmota_support/support_esp32.ino

@@ -978,4 +978,42 @@ uint32_t HwRandom(void) {
 #endif  // ESP_IDF_VERSION_MAJOR >= 5
 }
 
+/********************************************************************************************/
+// Since ESP-IDF 4.4, GPIO matrix or I/O is not reset during a restart
+// and GPIO configuration can get stuck because of leftovers
+//
+// This patched version of pinMode forces a full GPIO reset before setting new mode
+//
+#include "driver/gpio.h"
+
+extern "C" void ARDUINO_ISR_ATTR __pinMode(uint8_t pin, uint8_t mode);
+
+extern "C" void ARDUINO_ISR_ATTR pinMode(uint8_t pin, uint8_t mode) {
+  gpio_reset_pin((gpio_num_t)pin);
+  __pinMode(pin, mode);
+#ifdef CONFIG_IDF_TARGET_ESP32C3
+  // See GpioForceHoldRelay() below
+  gpio_hold_dis((gpio_num_t)pin);      // Allow state change
+#endif
+}
+
+#ifdef CONFIG_IDF_TARGET_ESP32C3
+void GpioForceHoldRelay(void) {
+  // Only ESP32-C3 toggles outputs on restart unless gpio_hold_en() is called before restart
+  // Retain the state when the chip or system is reset, for example, when watchdog time-out or Deep-sleep
+
+//  gpio_force_hold_all();             // This will hold flash/serial too so do not use
+
+  uint16_t real_gpio = GPIO_REL1 << 5;
+  uint16_t mask = 0xFFE0;
+  for (uint32_t i = 0; i < nitems(TasmotaGlobal.gpio_pin); i++) {
+    if ((TasmotaGlobal.gpio_pin[i] & mask) == real_gpio) {
+      gpio_hold_en((gpio_num_t)i);     // Retain the state when the chip or system is reset, for example, when watchdog time-out or Deep-sleep
+    }
+  }
+}
+#endif
+
+/********************************************************************************************/
+
 #endif  // ESP32

tasmota/tasmota_support/support_tasmota.ino

@@ -1916,24 +1916,6 @@ void TasConsoleInput(void) {
 
 /********************************************************************************************/
 
-#ifdef ESP32
-// Since ESP-IDF 4.4, GPIO matrix or I/O is not reset during a restart
-// and GPIO configuration can get stuck because of leftovers
-//
-// This patched version of pinMode forces a full GPIO reset before setting new mode
-//
-#include "driver/gpio.h"
-
-extern "C" void ARDUINO_ISR_ATTR __pinMode(uint8_t pin, uint8_t mode);
-
-extern "C" void ARDUINO_ISR_ATTR pinMode(uint8_t pin, uint8_t mode) {
-  gpio_reset_pin((gpio_num_t)pin);
-  __pinMode(pin, mode);
-}
-#endif
-
-/********************************************************************************************/
-
 void GpioInit(void)
 {
   if (!ValidModule(Settings->module)) {

tasmota/tasmota_support/support_wifi.ino

@@ -1149,12 +1149,15 @@ void WifiDisable(void) {
   TasmotaGlobal.global_state.wifi_down = 1;
 }
 
-void EspRestart(void)
+void EspRestart(void) {
-{
   ResetPwm();
   WifiShutdown(true);
   CrashDumpClear();           // Clear the stack dump in RTC
 
+#ifdef CONFIG_IDF_TARGET_ESP32C3
+  GpioForceHoldRelay();       // Retain the state when the chip or system is reset, for example, when watchdog time-out or Deep-sleep
+#endif  // CONFIG_IDF_TARGET_ESP32C3
+
   if (TasmotaGlobal.restart_halt) {  // Restart 2
     while (1) {
       OsWatchLoop();          // Feed OsWatch timer to prevent restart