Add wakeup pullup and pulldown pin modes

Author: igrr

hardware/esp8266com/esp8266/cores/esp8266/Arduino.h

@@ -51,6 +51,8 @@ void yield(void);
 #define INPUT_PULLDOWN    0x04
 #define OUTPUT            0x01
 #define OUTPUT_OPEN_DRAIN 0x03
+#define WAKEUP_PULLUP     0x05
+#define WAKEUP_PULLDOWN   0x07
 #define SPECIAL           0xF8 //defaults to the usable BUSes uart0rx/tx uart1tx and hspi
 #define FUNCTION_0        0x08
 #define FUNCTION_1        0x18

hardware/esp8266com/esp8266/cores/esp8266/core_esp8266_wiring_digital.c

@@ -53,6 +53,16 @@ extern void __pinMode(uint8_t pin, uint8_t mode) {
       } else if(mode == INPUT_PULLDOWN) {
           GPF(pin) |= (1 << GPFPD);  // Enable  Pulldown
       }
+    } else if(mode == WAKEUP_PULLUP || mode == WAKEUP_PULLDOWN){
+      GPF(pin) = GPFFS(GPFFS_GPIO(pin));//Set mode to GPIO
+      GPEC = (1 << pin); //Disable
+      if(mode == WAKEUP_PULLUP) {
+          GPF(pin) |= (1 << GPFPU);  // Enable  Pullup
+          GPC(pin) = (1 << GPCD) | (4 << GPCI) | (1 << GPCWE); //SOURCE(GPIO) | DRIVER(OPEN_DRAIN) | INT_TYPE(LOW) | WAKEUP_ENABLE(ENABLED)
+      } else {
+          GPF(pin) |= (1 << GPFPD);  // Enable  Pulldown
+          GPC(pin) = (1 << GPCD) | (5 << GPCI) | (1 << GPCWE); //SOURCE(GPIO) | DRIVER(OPEN_DRAIN) | INT_TYPE(HIGH) | WAKEUP_ENABLE(ENABLED)
+      }
     }
   } else if(pin == 16){
     GPF16 = GP16FFS(GPFFS_GPIO(pin));//Set mode to GPIO