giga: sync overlay with mbed pin order

fixes #7

Author: facchinm

loader/boards/arduino_giga_r1_m7.overlay

@@ -382,29 +382,37 @@
 						<&gpiob 12 0>,
 						<&gpiod 3 0>,
 
-						<&gpiob 6 0>,		/* SDA1 */
-						<&gpioh 12 0>,
-
-						<&gpioc 4 0>,
+						<&gpioc 4 0>,			/* A0 */
 						<&gpioc 5 0>,
 						<&gpiob 0 0>,
 						<&gpiob 1 0>,
 						<&gpioc 3 0>,
 						<&gpioc 2 0>,
-						<&gpioc 0 0>,			/* A6 */
-						<&gpioa 0 0>,
-						<&gpioz 0 0>,			/* analog only */
-						<&gpioz 1 0>,			/* analog only */
-						<&gpioz 2 0>,			/* analog only */
-						<&gpioz 3 0>,			/* analog only */
-						<&gpioa 4 0>,
-						<&gpioa 5 0>,
-						<&gpiob 5 0>,			/* CAN RX */
-						<&gpiob 13 0>,			/* CAN TX */
+						<&gpioc 0 0>,
+						<&gpioa 0 0>,			/* A7 */
+						<&gpioa 4 0>,			/* A12 */
+						<&gpioa 5 0>,			/* A13 */
 
 						<&gpioi 12 GPIO_ACTIVE_LOW>,
 						<&gpioj 13 GPIO_ACTIVE_LOW>,
-						<&gpioe 3 GPIO_ACTIVE_LOW>;
+						<&gpioe 3 GPIO_ACTIVE_LOW>,
+
+						<&gpiog 9 0>,			/* SPI1 MISO */
+						<&gpiod 7 0>,			/* SPI1 MOSI */
+						<&gpiob 3 0>,			/* SPI1 SCK */
+
+						<&gpioa 15 0>,			/* USB HOST ENABLE */
+
+						<&gpiob 5 0>,			/* CAN RX */
+						<&gpiob 13 0>,			/* CAN TX */
+
+						<&gpiob 6 0>,			/* SDA1 */
+						<&gpioh 12 0>,
+
+						<&gpioz 0 0>,			/* analog only A8 */
+						<&gpioz 1 0>,			/* analog only A9 */
+						<&gpioz 2 0>,			/* analog only A10 */
+						<&gpioz 3 0>;			/* analog only A11 */
 
 		builtin-led-gpios = <&gpioi 12 GPIO_ACTIVE_LOW>,
                         <&gpioj 13 GPIO_ACTIVE_LOW>,

variants/arduino_giga_r1_m7/pure_analog_pins.cpp

@@ -0,0 +1,17 @@
+#include "pure_analog_pins.h"
+
+#undef A8
+#undef A9
+#undef A10
+#undef A11
+
+PureAnalogPin  A8_PURE(0);
+PureAnalogPin  A9_PURE(1);
+PureAnalogPin  A10_PURE(2);
+PureAnalogPin  A11_PURE(3);
+
+int getAnalogReadResolution();
+
+int analogRead(PureAnalogPin pin) {
+  return ::analogRead(A8 + pin.get());
+}

variants/arduino_giga_r1_m7/pure_analog_pins.h

@@ -0,0 +1,57 @@
+#ifndef _PURE_ANALOG_PINS_
+#define _PURE_ANALOG_PINS_
+
+/******************************************************************************
+ * INCLUDE
+ ******************************************************************************/
+
+#include "Arduino.h"
+
+/******************************************************************************
+ * PREPROCESSOR-MAGIC
+ ******************************************************************************/
+
+#define PURE_ANALOG_AS_DIGITAL_ATTRIBUTE __attribute__ ((error("Can't use pins A8-A11 as digital")))
+
+/******************************************************************************
+ * TYPEDEF
+ ******************************************************************************/
+
+class PureAnalogPin {
+public:
+	PureAnalogPin(int _pin) : pin(_pin) {};
+	int get() {
+		return pin;
+	};
+	bool operator== (PureAnalogPin const & other) const {
+		return pin == other.pin;
+	}
+	//operator int() = delete;
+	__attribute__ ((error("Change me to a #define"))) operator int();
+private:
+	int pin;
+};
+
+extern PureAnalogPin  A8_PURE;
+extern PureAnalogPin  A9_PURE;
+extern PureAnalogPin  A10_PURE;
+extern PureAnalogPin  A11_PURE;
+
+#define A8  A8_PURE
+#define A9  A9_PURE
+#define A10  A10_PURE
+#define A11  A11_PURE
+
+/******************************************************************************
+ * FUNCTION DECLARATION
+ ******************************************************************************/
+
+void      PURE_ANALOG_AS_DIGITAL_ATTRIBUTE pinMode     (PureAnalogPin pin, PinMode mode);
+PinStatus PURE_ANALOG_AS_DIGITAL_ATTRIBUTE digitalRead (PureAnalogPin pin);
+void      PURE_ANALOG_AS_DIGITAL_ATTRIBUTE digitalWrite(PureAnalogPin pin, PinStatus value);
+int       analogRead  (PureAnalogPin pin);
+void      PURE_ANALOG_AS_DIGITAL_ATTRIBUTE analogWrite (PureAnalogPin pin, int value);
+
+#undef PURE_ANALOG_AS_DIGITAL_ATTRIBUTE
+
+#endif /* _PURE_ANALOG_PINS_ */

variants/arduino_giga_r1_m7/variant.h

@@ -4,6 +4,8 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
+#include "pure_analog_pins.h"
+
 // TODO: correctly handle these legacy defines
 #define MOSI    0
 #define MISO    0