Added INPUT_PULLUP support and let analog write use full PWM range

arduino/cores/esp32/wiring_analog.c

@@ -38,7 +38,7 @@ void analogWrite(uint32_t pin, uint32_t value)
 
   ledc_channel_config_t ledc_conf = {
     .channel = (pin % 7),
-    .duty = (value << 2),
+    .duty = (value << 2) | ((value & 0xC0) >> 6),
     .gpio_num = pin,
     .intr_type = LEDC_INTR_DISABLE,
     .speed_mode = LEDC_HIGH_SPEED_MODE,

arduino/cores/esp32/wiring_digital.c

@@ -33,6 +33,11 @@ void pinMode(uint32_t pin, uint32_t mode)
       gpio_set_direction((gpio_num_t)pin, GPIO_MODE_OUTPUT);
       gpio_set_pull_mode((gpio_num_t)pin, GPIO_FLOATING);
       break;
+
+    case INPUT_PULLUP:
+      gpio_set_direction((gpio_num_t)pin, GPIO_MODE_INPUT);
+      gpio_set_pull_mode((gpio_num_t)pin, GPIO_PULLUP_ONLY);
+      break;
   }
 
   PIN_FUNC_SELECT(GPIO_PIN_MUX_REG[pin], PIN_FUNC_GPIO);

arduino/cores/esp32/wiring_digital.h

@@ -31,6 +31,7 @@ extern "C" {
 
 #define INPUT  0x00
 #define OUTPUT 0x01
+#define INPUT_PULLUP 0x02
 
 extern void pinMode(uint32_t pin, uint32_t mode);