add board WiFi Slot (#3916)

variants/wifi_slot/analogRead.cpp

@@ -0,0 +1,50 @@
+#include "wiring_private.h"
+#include "pins_arduino.h"
+
+extern "C" int  __analogRead(uint8_t pin);
+
+extern "C" int analogRead(uint8_t pin) {
+
+  static uint8_t currentAin = 0;
+
+  delay(0);
+  if (pin >= ANALOG_INPUT_HARDWARE) {
+    return 0;
+  }
+  uint8_t ain = analog_pin_to_mux_channel[pin];
+  if (ain == (uint8_t)NOT_A_PIN) {
+    return 0;
+  } 
+  if (currentAin > ain) {
+    for (int i = 0; i < (8 - currentAin); ++i)
+    {
+      digitalWrite(ANALOG_INPUT_SELECTOR_PIN, HIGH);
+      digitalWrite(ANALOG_INPUT_SELECTOR_PIN, LOW);
+      digitalWrite(ANALOG_INPUT_SELECTOR_PIN, HIGH);
+      digitalWrite(ANALOG_INPUT_SELECTOR_PIN, LOW);
+    }
+    currentAin = 0;
+  }
+  for (int i = currentAin; i < ain; ++i)
+  {
+    digitalWrite(ANALOG_INPUT_SELECTOR_PIN, HIGH);
+    digitalWrite(ANALOG_INPUT_SELECTOR_PIN, LOW);
+    digitalWrite(ANALOG_INPUT_SELECTOR_PIN, HIGH);
+    digitalWrite(ANALOG_INPUT_SELECTOR_PIN, LOW);
+  }
+  currentAin = ain;
+  return __analogRead(ANALOG_INPUT_HARDWARE);
+}
+
+void initVariant() {
+  // we need to reset analog mux. When ANALOG_INPUT_SELECTOR_PIN is high
+  // on ~0.4 ms, mux channel is becoming 0.
+  // Mux channel is swithing on back \_ front. But there is no switching
+  // - rc reset is still high when ANALOG_INPUT_SELECTOR_PIN became low
+  uint16_t resetDelay = 777;
+  pinMode(ANALOG_INPUT_SELECTOR_PIN, OUTPUT);
+  digitalWrite(ANALOG_INPUT_SELECTOR_PIN, HIGH);
+  delayMicroseconds(resetDelay);
+  digitalWrite(ANALOG_INPUT_SELECTOR_PIN, LOW);
+  delayMicroseconds(resetDelay);
+}

variants/wifi_slot/pins_arduino.h

@@ -0,0 +1,86 @@
+/*
+  pins_arduino.h - Pin definition functions for Arduino
+  Part of Arduino - http://www.arduino.cc/
+
+  Copyright (c) 2007 David A. Mellis
+  Modified for ESP8266 WIFIO board by Ivan Grokhotkov, 2015.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General
+  Public License along with this library; if not, write to the
+  Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+  Boston, MA  02111-1307  USA
+
+  Changed : 24.11.2017 Vasily Basalaev
+            Definition for WiFi Slot
+            Amperka LLC
+            http://amperka.ru
+
+  $Id: wiring.h 249 2007-02-03 16:52:51Z mellis $
+*/
+
+#ifndef Pins_Arduino_h
+#define Pins_Arduino_h
+
+#define PIN_WIRE_SDA (2)
+#define PIN_WIRE_SCL (0)
+
+static const uint8_t SDA = PIN_WIRE_SDA;
+static const uint8_t SCL = PIN_WIRE_SCL;
+
+#define PIN_A0 (3)
+#define PIN_A1 (1)
+#define PIN_A2 (16)
+#define PIN_A3 (13)
+#define PIN_A4 (5)
+#define PIN_A5 (14)
+#define PIN_A6 (4)
+#define PIN_A7 (12)
+
+// A0 will be assigned in "../generic/common.h"
+// static const uint8_t A0 = PIN_A0;
+static const uint8_t A1 = PIN_A1;
+static const uint8_t A2 = PIN_A2;
+static const uint8_t A3 = PIN_A3;
+static const uint8_t A4 = PIN_A4;
+static const uint8_t A5 = PIN_A5;
+static const uint8_t A6 = PIN_A6;
+static const uint8_t A7 = PIN_A7;
+
+#define LED_BUILTIN 2
+
+static const uint8_t ANALOG_INPUT_SELECTOR_PIN = 15;
+static const uint8_t ANALOG_INPUT_HARDWARE = 17;
+
+static const uint8_t analog_pin_to_mux_channel[] = {
+    (uint8_t)NOT_A_PIN   // 0
+  , 1                    // 1
+  , (uint8_t)NOT_A_PIN   // 2
+  , 0                    // 3
+  , 6                    // 4
+  , 4                    // 5
+  , (uint8_t)NOT_A_PIN   // 6
+  , (uint8_t)NOT_A_PIN   // 7
+  , (uint8_t)NOT_A_PIN   // 8
+  , (uint8_t)NOT_A_PIN   // 9
+  , (uint8_t)NOT_A_PIN   // 10
+  , (uint8_t)NOT_A_PIN   // 11
+  , 7                    // 12
+  , 3                    // 13
+  , 5                    // 14
+  , (uint8_t)NOT_A_PIN   // 15
+  , 2                    // 16
+};
+
+#include "../generic/common.h"
+
+#endif /* Pins_Arduino_h */