feat: Cygnet 3V3 Regulator Management

Author: zfields

variants/STM32L4xx/L433C(B-C)(T-U)_L443CC(T-U)/variant_CYGNET.h

@@ -98,6 +98,27 @@
   #define ENABLE_DISCHARGING      LOW
 #endif
 
+// Macro functions for 3V3 regulator management
+#ifndef ENABLE_3V3_REGULATOR
+  #define ENABLE_3V3_REGULATOR()  do { \
+    digitalWrite(DISCHARGE_3V3, DISABLE_DISCHARGING); \
+    digitalWrite(ENABLE_3V3, HIGH); \
+  } while (0)
+#endif
+#ifndef DISABLE_3V3_REGULATOR
+  #define DISABLE_3V3_REGULATOR() do { \
+    digitalWrite(ENABLE_3V3, LOW); \
+  } while (0)
+#endif
+#ifndef DRAIN_3V3_REGULATOR_MS
+  #define DRAIN_3V3_REGULATOR_MS(ms) do { \
+    if (digitalRead(ENABLE_3V3)) { break; } \
+    digitalWrite(DISCHARGE_3V3, ENABLE_DISCHARGING); \
+    delay(ms); \
+    digitalWrite(DISCHARGE_3V3, DISABLE_DISCHARGING); \
+  } while (0)
+#endif
+
 // Dedicated board pins
 #ifndef VMAIN_ADC
   #define VMAIN_ADC               PA4