Make sure that we have channels available

Author: me-no-dev

Diff for: cores/esp32/esp32-hal-ledc.c

@@ -339,6 +339,10 @@ void analogWrite(uint8_t pin, int value) {
   // Use ledc hardware for internal pins
   if (pin < SOC_GPIO_PIN_COUNT) {
     if (pin_to_channel[pin] == 0) {
+      if (!cnt_channel) {
+          log_e("No more analogWrite channels available! You can have maximum %u", SOC_LEDC_CHANNEL_NUM);
+          return;
+      }
       pin_to_channel[pin] = cnt_channel--;
       ledcAttachPin(pin, cnt_channel);
       ledcSetup(cnt_channel, 1000, 8);