added TurnPeripheralsOff example

Author: cristidragomir97

Diff for: examples/TurnPeripheralsOff/TurnPeripheralsOff.ino

@@ -0,0 +1,71 @@
+/**
+ * This example builds on the Standby Example which puts the microcontroller of the Portenta H7 into
+ * standby mode for 10 seconds by also turning off most of the peripherals on the board using the PF1550 PMIC.
+ * This example turns off the following power rails on the PMIC:
+ * * LDO1 - ANX7625 video bridge 
+ * * LDO2 - onboard misc. chips
+ * * LDO3 - 1.2V for Ethernet
+ * * SW1 - Ethernet PHY, SDRAM, USB PHY
+ * * SW2 - External Power Regulator
+ * 
+ * Original author: A. Vidstrom (http://arduino.cc)
+ * Updated by: C. Dragomir (http://arduino.cc)
+ * This code is in the public domain
+ */
+
+#define NO_ETHERNET_TURN_OFF
+
+#include "Arduino_LowPowerPortentaH7.h"
+#include "Arduino_PMIC.h"
+#include "Wire.h"
+
+void setup() {
+
+  #if defined CORE_CM7
+    if (LowPowerReturnCode::success != LowPower.checkOptionBytes()) {
+        LowPower.prepareOptionBytes();
+    }
+    bootM4();
+  #endif
+
+  pinMode(LEDB, OUTPUT);
+  digitalWrite(LEDB, LOW);
+  delay(1000);
+
+  #if defined CORE_CM7
+    PMIC.begin();
+
+    // Turn off the ANX7625 video bridge
+    PMIC.getControl() -> turnLDO1Off(Ldo1Mode::Normal);
+
+    // Turn off misc onboard chips
+    PMIC.getControl() -> turnLDO2Off(Ldo2Mode::Normal);
+
+    // Turn off the 1.2V for Ethernet
+    PMIC.getControl() -> turnLDO3Off(Ldo3Mode::Normal);
+
+    // Turn off the Ethernet PHY, SDRAM, and USB PHY
+    PMIC.getControl() -> turnSw1Off(Sw1Mode::Normal);
+
+    // Turn off the external power regulator
+    PMIC.getControl() -> turnSw2Off(Sw2Mode::Normal);
+
+    // Turn off the I2C bus as the PMIC might try to communicate with the microcontroller
+    Wire1.end();
+
+    
+
+    LowPower.standbyM7(LowPowerStandbyType::untilPinActivity | LowPowerStandbyType::untilTimeElapsed, 10 s);
+    //
+    // The following is an alternative way to go into Standby Mode for 10 seconds:
+    // LowPower.standbyM7(LowPowerStandbyType::untilTimeElapsed, RTCWakeupDelay(0, 0, 10));
+    //
+    // The following is how to go to into Standby Mode waiting only for a wakeup pin:
+    // LowPower.standbyM7(LowPowerStandbyType::untilPinActivity);
+    //
+  #else
+    LowPower.standbyM4();
+  #endif
+}
+
+void loop() {}