change reset pin for portenta h7 and disable the reset procedure for machine control

Author: fabik111

README.md

@@ -34,7 +34,22 @@ The procedure:
 * `Arduino MKR WiFi 1010`: short the pin 7 to GND until the led turns off
 * `Arduino GIGA R1 WiFi`: short the pin 7 to GND until the led turns off
 * `Arduino Nano RP2040 Connect`: short the pin 2 to 3.3V until the led turns off
+* `Arduino Portenta H7`: short the pin 0 to GND until the led turns off
 * Other boards: short the pin 2 to GND until the led turns off
+* `Portenta Machine Control`: currently the reset procedure is not available
+
+### More on the reconfiguration pin
+Internally, the pin indicated in the procedure is set as `INPUT_PULLUP` (except for `Arduino Opta` ) and it's attached to an ISR fired on every change of the pin's status.
+
+In order to be notified when the ISR is fired, it's possible to register a callback function using the function `NetworkConfigurator.addReconfigurePinCallback(callback)`. Please take the example as reference.
+
+### Change the reconfiguration pin
+In order to change the default pin for resetting the board, it's possible to use the function `NetworkConfigurator.setReconfigurePin(your_pin)` specifying the new pin.
+The pin must be in the list of digital pins usable for interrupts. Please refer to the Arduino documentation for more details: https://docs.arduino.cc/language-reference/en/functions/external-interrupts/attachInterrupt/
+
+### Disable the reconfiguration feature
+In order to disable the reconfiguration procedure, use this function in the sketch `NetworkConfigurator.setReconfigurePin(DISABLE_PIN)`
+
 
 ## Configurator Agents
 The library provides a set of *Configurator Agents* that added as plug-in to the sketch handle the communication between the Arduino Network Configurator and an external client ([*Arduino IoT App*](https://cloud.arduino.cc/iot-remote-app/) and Arduino IoT Cloud) for configuring the board.

examples/NetworkConfiguratorDemo/NetworkConfiguratorDemo.ino

@@ -21,6 +21,8 @@
  * - Arduino MKR WiFi 1010: short the pin 7 to GND until the led turns off
  * - Arduino GIGA R1 WiFi: short the pin 7 to GND until the led turns off
  * - Arduino Nano RP2040 Connect: short the pin 2 to 3.3V until the led turns off
+ * - Portenta H7: short the pin 0 to GND until the led turns off
+ * - Portenta Machine Control: the reset is not available
  * - Other boards: short the pin 2 to GND until the led turns off
  *
  * In this sketch the BLE and Serial interfaces are always enabled and ready for accepting

src/ANetworkConfigurator_Config.h

@@ -57,7 +57,9 @@
 #if defined(ARDUINO_PORTENTA_H7_M7)
   #define NETWORK_CONFIGURATOR_COMPATIBLE 1
   #define ZERO_TOUCH_ENABLED 1
-  #define PIN_RECONFIGURE 2
+  #define I2C_ADD_DETECT_MACHINE_CONTROL_1 0x23
+  #define I2C_ADD_DETECT_MACHINE_CONTROL_2 0x22
+  #define PIN_RECONFIGURE 0
   #define LED_RECONFIGURE LED_BUILTIN
   #define BOARD_HAS_RGB
   #define GREEN_LED LEDG

src/Arduino_NetworkConfigurator.cpp

@@ -122,6 +122,8 @@ NetworkConfiguratorStates NetworkConfiguratorClass::update() {
    * - Arduino MKR WiFi 1010: short the pin 7 to GND until the led turns off
    * - Arduino GIGA R1 WiFi: short the pin 7 to GND until the led turns off
    * - Arduino Nano RP2040 Connect: short the pin 2 to 3.3V until the led turns off
+   * - Portenta H7: short the pin 0 to GND until the led turns off
+   * - Portenta Machine Control: the reset is not available
    * - Other boards: short the pin 2 to GND until the led turns off
    */
 

src/Arduino_NetworkConfigurator.h

@@ -58,6 +58,8 @@ enum class NetworkConfiguratorStates { ZERO_TOUCH_CONFIG,
  * - Arduino MKR WiFi 1010: short the pin 7 to GND until the led turns off
  * - Arduino GIGA R1 WiFi: short the pin 7 to GND until the led turns off
  * - Arduino Nano RP2040 Connect: short the pin 2 to 3.3V until the led turns off
+ * - Portenta H7: short the pin 0 to GND until the led turns off
+ * - Portenta Machine Control: the reset is not available
  * - Other boards: short the pin 2 to GND until the led turns off
  *
  */

src/utility/ResetInput.cpp

@@ -11,6 +11,28 @@
 #include "ResetInput.h"
 #include "utility/LEDFeedback.h"
 
+#if defined(ARDUINO_PORTENTA_H7_M7)
+#include <Wire.h>
+
+
+bool isPortentaMachineControlAttached() {
+  Wire.begin();
+  Wire.beginTransmission(I2C_ADD_DETECT_MACHINE_CONTROL_1);
+  if (Wire.endTransmission() != 0) {
+    return false;
+  }
+
+  Wire.beginTransmission(I2C_ADD_DETECT_MACHINE_CONTROL_2);
+  if (Wire.endTransmission() != 0) {
+    return false;
+  }
+
+  Wire.end();
+  return true;
+}
+
+#endif
+
 ResetInput &ResetInput::getInstance() {
   static ResetInput instance;
   return instance;
@@ -25,6 +47,12 @@ ResetInput::ResetInput() {
 }
 
 void ResetInput::begin() {
+#if defined(ARDUINO_PORTENTA_H7_M7)
+  if(isPortentaMachineControlAttached()) {
+    return; // Portenta Machine Control is not supported
+  }
+#endif
+
   if(_pin == DISABLE_PIN){
     return;
   }
@@ -35,7 +63,6 @@ void ResetInput::begin() {
 #endif
   pinMode(LED_RECONFIGURE, OUTPUT);
   digitalWrite(LED_RECONFIGURE, LED_OFF);
-
   attachInterrupt(digitalPinToInterrupt(_pin),_pressedCallback, CHANGE);
 }