[hal] Consistently use .hpp for C++ header content

Some headers were renamed, but others were split.

hal/src/main/native/sim/DigitalInternal.hpp

@@ -0,0 +1,60 @@
+// Copyright (c) FIRST and other WPILib contributors.
+// Open Source Software; you can modify and/or share it under the terms of
+// the WPILib BSD license file in the root directory of this project.
+
+#pragma once
+
+#include <stdint.h>
+
+#include <string>
+
+#include "PortsInternal.hpp"
+#include "wpi/hal/handles/DigitalHandleResource.hpp"
+
+namespace wpi::hal {
+/**
+ * MXP channels when used as digital output PWM are offset from actual value
+ */
+constexpr int32_t kMXPDigitalPWMOffset = 6;
+
+constexpr int32_t kExpectedLoopTiming = 40;
+
+/**
+ * kDefaultPwmPeriod is in ms
+ *
+ * - 20ms periods (50 Hz) are the "safest" setting in that this works for all
+ *   devices
+ * - 20ms periods seem to be desirable for Vex Motors
+ * - 20ms periods are the specified period for HS-322HD servos, but work
+ *   reliably down to 10.0 ms; starting at about 8.5ms, the servo sometimes hums
+ *   and get hot; by 5.0ms the hum is nearly continuous
+ * - 10ms periods work well for Victor 884
+ * - 5ms periods allows higher update rates for modern motor controllers.
+ *
+ * kDefaultPwmPeriod is the 1x period (5.05 ms).  In hardware, the period
+ * scaling is implemented as an output squelch to get longer periods for old
+ * devices.
+ */
+constexpr float kDefaultPwmPeriod = 5.05f;
+constexpr int32_t kPwmDisabled = 0;
+
+struct DigitalPort {
+  uint8_t channel;
+  int32_t filterIndex = 0;
+  std::string previousAllocation;
+};
+
+extern DigitalHandleResource<HAL_DigitalHandle, DigitalPort,
+                             kNumDigitalChannels + kNumPWMHeaders>*
+    digitalChannelHandles;
+
+/**
+ * Map DIO channel numbers from their physical number (10 to 26) to their
+ * position in the bit field.
+ */
+int32_t remapMXPChannel(int32_t channel);
+
+int32_t remapMXPPWMChannel(int32_t channel);
+
+int32_t GetDigitalInputChannel(HAL_DigitalHandle handle, int32_t* status);
+}  // namespace wpi::hal